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authorGlenn L McGrath <bug1@ihug.co.nz>2003-02-09 06:51:14 +0000
committerGlenn L McGrath <bug1@ihug.co.nz>2003-02-09 06:51:14 +0000
commit06e9565b6c365668dafeef1fdc0e60c9a1154623 (patch)
treec75619aad6d3ca6f4c32cd8d1dffbe4f6c53367b /networking
parent877d418b39421361800afe4e1d4ca69b80edc121 (diff)
downloadbusybox-06e9565b6c365668dafeef1fdc0e60c9a1154623.tar.gz
New applet, inetd, make httpd features more configurable, update authors, last_patch_80
from Vladimir N. Oleynik
Diffstat (limited to 'networking')
-rw-r--r--networking/Config.in113
-rw-r--r--networking/Makefile.in1
-rw-r--r--networking/httpd.c1948
-rw-r--r--networking/inetd.c1280
4 files changed, 2601 insertions, 741 deletions
diff --git a/networking/Config.in b/networking/Config.in
index 22676c085..527aebbac 100644
--- a/networking/Config.in
+++ b/networking/Config.in
@@ -41,6 +41,15 @@ config CONFIG_HTTPD
help
Serve web pages via an HTTP server.
+config CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
+ bool " Support call from inetd only"
+ default n
+ depends on CONFIG_HTTPD
+ help
+ This option disabling uid and port options for httpd applet
+ and more others reducing size moments, but require
+ internet superserver daemon for usaging.
+
config CONFIG_FEATURE_HTTPD_BASIC_AUTH
bool " Enable Basic Authentication and IP address checking"
default n
@@ -49,6 +58,66 @@ config CONFIG_FEATURE_HTTPD_BASIC_AUTH
Utilizes /etc/httpd.conf for security settings allowing
ip address filtering and basic authentication on a per url basis.
+config CONFIG_FEATURE_HTTPD_CGI
+ bool " Enable support Common Gateway Interface"
+ default n
+ depends on CONFIG_HTTPD
+ help
+ Disable this for do very small module
+
+config CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
+ bool " Enable support reload global config file after hup signaled"
+ default n
+ depends on CONFIG_HTTPD
+ help
+ Disable this for do very small module
+
+config CONFIG_FEATURE_HTTPD_SETUID
+ bool " Enable support -u user option"
+ default n
+ depends on CONFIG_HTTPD
+ help
+ Require for drop privilegies after bind() to privilegies port
+
+config CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
+ bool " Enable support load from config file mime types"
+ default n
+ depends on CONFIG_HTTPD
+ help
+ After set this you can adding or change mime types from file
+ suffixes in config files
+
+config CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
+ bool " Enable support set eviroment REMOTE_PORT"
+ default n
+ depends on CONFIG_FEATURE_HTTPD_CGI
+ help
+ After set this your CGI script can know own remote port connecting
+
+config CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV
+ bool " Enable support nonstandart httpd feature set CGI_var=value"
+ default n
+ depends on CONFIG_FEATURE_HTTPD_CGI
+ help
+ After set this your CGI script can have trivial parse getted vars
+
+config CONFIG_FEATURE_HTTPD_DECODE_URL_STR
+ bool " Support nonstandart httpd feature decode URL to stdout"
+ default n
+ depends on CONFIG_HTTPD
+ help
+ After set this your can decode URL from -d argument to stdout,
+ example -d "Hello%20World" as "Hello World"
+
+config CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
+ bool " Support nonstandart httpd feature encode argument to URL"
+ default n
+ depends on CONFIG_HTTPD
+ help
+ After set this your can encode from -d argument to stdout as URL,
+ example -e "<Hello World>" as "%3CHello%20World%3E"
+
+
config CONFIG_IFCONFIG
bool "ifconfig"
default n
@@ -132,6 +201,48 @@ config CONFIG_FEATURE_IFUPDOWN_MAPPING
This enables support for the "mapping" stanza, unless you have
a weird network setup you dont need it.
+config CONFIG_INETD
+ bool "inetd"
+ default n
+ help
+ Internet superserver daemon
+
+config CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO
+ bool " Support echo service"
+ default y
+ depends on CONFIG_INETD
+ help
+ Echo received data internal inetd service
+
+config CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD
+ bool " Support discard service"
+ default y
+ depends on CONFIG_INETD
+ help
+ Internet /dev/null internal inetd service
+
+config CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME
+ bool " Support time service"
+ default y
+ depends on CONFIG_INETD
+ help
+ Return 32 bit time since 1900 internal inetd service
+
+config CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME
+ bool " Support daytime service"
+ default y
+ depends on CONFIG_INETD
+ help
+ Return human-readable time internal inetd service
+
+config CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
+ bool " Support chargen service"
+ default y
+ depends on CONFIG_INETD
+ help
+ Familiar character generator internal inetd service
+
+
config CONFIG_IP
bool "ip"
default n
@@ -316,7 +427,7 @@ config CONFIG_TELNETD
Please submit a patch to add help text for this item.
config CONFIG_FEATURE_TELNETD_INETD
- bool " Use inetd"
+ bool " Support call from inetd only"
default n
depends on CONFIG_TELNETD
help
diff --git a/networking/Makefile.in b/networking/Makefile.in
index 12fc8ddbd..95709ee42 100644
--- a/networking/Makefile.in
+++ b/networking/Makefile.in
@@ -30,6 +30,7 @@ NETWORKING-$(CONFIG_HOSTNAME) += hostname.o
NETWORKING-$(CONFIG_HTTPD) += httpd.o
NETWORKING-$(CONFIG_IFCONFIG) += ifconfig.o
NETWORKING-$(CONFIG_IFUPDOWN) += ifupdown.o
+NETWORKING-$(CONFIG_INETD) += inetd.o
NETWORKING-$(CONFIG_IP) += ip.o
NETWORKING-$(CONFIG_IPCALC) += ipcalc.o
NETWORKING-$(CONFIG_IPADDR) += ipaddr.o
diff --git a/networking/httpd.c b/networking/httpd.c
index bceb89ba3..e61518c20 100644
--- a/networking/httpd.c
+++ b/networking/httpd.c
@@ -1,8 +1,10 @@
/*
* httpd implementation for busybox
*
- * Copyright (C) 2002 Glenn Engel <glenne@engel.org>
+ * Copyright (C) 2002,2003 Glenn Engel <glenne@engel.org>
+ * Copyright (C) 2003 Vladimir Oleynik <dzo@simtreas.ru>
*
+ * simplify patch stolen from libbb without using strdup
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -20,100 +22,252 @@
*
*****************************************************************************
*
- * Typical usage:
- * cd /var/www
- * httpd
- * This is equivalent to
- * cd /var/www
- * httpd -p 80 -c /etc/httpd.conf -r "Web Server Authentication"
+ * Typical usage:
+ * for non root user
+ * httpd -p 8080 -h $HOME/public_html
+ * or for daemon start from rc script with uid=0:
+ * httpd -u www
+ * This is equivalent if www user have uid=80 to
+ * httpd -p 80 -u 80 -h /www -c /etc/httpd.conf -r "Web Server Authentication"
+ *
*
* When a url contains "cgi-bin" it is assumed to be a cgi script. The
* server changes directory to the location of the script and executes it
* after setting QUERY_STRING and other environment variables. If url args
* are included in the url or as a post, the args are placed into decoded
* environment variables. e.g. /cgi-bin/setup?foo=Hello%20World will set
- * the $CGI_foo environment variable to "Hello World".
+ * the $CGI_foo environment variable to "Hello World" while
+ * CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV enabled.
*
* The server can also be invoked as a url arg decoder and html text encoder
* as follows:
- * foo=`httpd -d $foo` # decode "Hello%20World" as "Hello World"
- * bar=`httpd -e "<Hello World>"` # encode as "&#60Hello&#32World&#62"
+ * foo=`httpd -d $foo` # decode "Hello%20World" as "Hello World"
+ * bar=`httpd -e "<Hello World>"` # encode as "%3CHello%20World%3E"
*
* httpd.conf has the following format:
-
-ip:10.10. # Allow any address that begins with 10.10.
-ip:172.20. # Allow 172.20.x.x
-ip:127.0.0.1 # Allow local loopback connections
-/cgi-bin:foo:bar # Require user foo, pwd bar on urls starting with /cgi-bin
-/:admin:setup # Require user admin, pwd setup on urls starting with /
- *
- * To open up the server:
- * ip:* # Allow any IP address
- * /:* # no password required for urls starting with / (all)
- *
- * Processing of the file stops on the first sucessful match. If the file
- * is not found, the server is assumed to be wide open.
- *
- *****************************************************************************
- *
- * Desired enhancements:
- * cache httpd.conf
- * support tinylogin
- *
+A:172.20. # Allow any address that begins with 172.20
+A:10.10. # Allow any address that begins with 10.10.
+A:10.10 # Allow any address that previous set and 10.100-109.X.X
+A:127.0.0.1 # Allow local loopback connections
+D:* # Deny from other IP connections
+/cgi-bin:foo:bar # Require user foo, pwd bar on urls starting with /cgi-bin/
+/adm:admin:setup # Require user admin, pwd setup on urls starting with /adm/
+/adm:toor:PaSsWd # or user toor, pwd PaSsWd on urls starting with /adm/
+.au:audio/basic # additional mime type for audio.au files
+
+A shortes path and D:from[^*] automaticaly sorting to top.
+All longest path can`t reset user:password if shorted protect setted.
+
+A/D may be as a/d or allow/deny - first char case unsensitive parsed only.
+
+Each subdir can have config file.
+For protect as user:pass current subdir and subpathes set from subdir config:
+/:user:pass
+if not, other subpathes for give effect must have path from httpd root
+/current_subdir_path_from_httpd_root/subpath:user:pass
+
+The Deny/Allow IP logic:
+
+ 1. Allow all:
+The config don`t set D: lines
+
+ 2. Allow from setted only:
+see the begin format example
+
+ 3. Set deny, allow from other:
+D:1.2.3. # deny from 1.2.3.0 - 1.2.3.255
+D:2.3.4. # deny from 2.3.4.0 - 2.3.4.255
+A:* # allow from other, this line not strongly require
+
+ A global and subdirs config merging logic:
+allow rules reducing, deny lines strongled.
+ The algorithm combinations:
+
+ 4. If current config have
+A:from
+D:*
+ subdir config A: lines skiping, D:from - moving top
+
+ 5. If current config have
+D:from
+A:*
+ result config:
+D:from current
+D:from subdir
+A:from subdir
+ and seting D:* if subdir config have this
+
+ If -c don`t setted, used httpd root config, else httpd root config skiped.
+ Exited with fault if can`t open start config.
+ For set wide open server, use -c /dev/null ;=)
*/
+
#include <stdio.h>
#include <ctype.h> /* for isspace */
-#include <stdarg.h> /* for varargs */
-#include <string.h> /* for strerror */
+#include <string.h>
#include <stdlib.h> /* for malloc */
#include <time.h>
-#include <errno.h>
#include <unistd.h> /* for close */
#include <signal.h>
#include <sys/types.h>
#include <sys/socket.h> /* for connect and socket*/
#include <netinet/in.h> /* for sockaddr_in */
-#include <sys/types.h>
+#include <sys/time.h>
#include <sys/stat.h>
#include <sys/wait.h>
-#include <fcntl.h>
+#include <fcntl.h> /* for open modes */
+#include "busybox.h"
+
-static const char httpdVersion[] = "busybox httpd/1.13 3-Jan-2003";
+static const char httpdVersion[] = "busybox httpd/1.20 31-Jan-2003";
+static const char default_patch_httpd_conf[] = "/etc";
+static const char httpd_conf[] = "httpd.conf";
+static const char home[] = "/www";
-// #define DEBUG 1
-#ifndef HTTPD_STANDALONE
-#include <config.h>
-#include <busybox.h>
// Note: xfuncs are not used because we want the server to keep running
// if something bad happens due to a malformed user request.
-// As a result, all memory allocation is checked rigorously
-#else
-/* standalone */
+// As a result, all memory allocation after daemonize
+// is checked rigorously
+
+//#define DEBUG 1
+
+/* Configure options, disabled by default as nonstandart httpd feature */
+//#define CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV
+//#define CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
+//#define CONFIG_FEATURE_HTTPD_DECODE_URL_STR
+
+/* disabled as not necessary feature */
+//#define CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
+//#define CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
+//#define CONFIG_FEATURE_HTTPD_SETUID
+//#define CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
+
+/* If seted this you can use this server from internet superserver only */
+//#define CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
+
+/* You can use this server as standalone, require libbb.a for linking */
+//#define HTTPD_STANDALONE
+
+/* Config options, disable this for do very small module */
+//#define CONFIG_FEATURE_HTTPD_CGI
+//#define CONFIG_FEATURE_HTTPD_BASIC_AUTH
+
+#ifdef HTTPD_STANDALONE
+/* standalone, enable all features */
+#undef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
+/* unset config option for remove warning as redefined */
+#undef CONFIG_FEATURE_HTTPD_BASIC_AUTH
+#undef CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV
+#undef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
+#undef CONFIG_FEATURE_HTTPD_DECODE_URL_STR
+#undef CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
+#undef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
+#undef CONFIG_FEATURE_HTTPD_CGI
+#undef CONFIG_FEATURE_HTTPD_SETUID
+#undef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
+/* enable all features now */
#define CONFIG_FEATURE_HTTPD_BASIC_AUTH
-void show_usage()
+#define CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV
+#define CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
+#define CONFIG_FEATURE_HTTPD_DECODE_URL_STR
+#define CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
+#define CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
+#define CONFIG_FEATURE_HTTPD_CGI
+#define CONFIG_FEATURE_HTTPD_SETUID
+#define CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
+
+/* require from libbb.a for linking */
+const char *applet_name = "httpd";
+
+void show_usage(void)
{
- fprintf(stderr,"Usage: httpd [-p <port>] [-c configFile] [-d/-e <string>] [-r realm]\n");
+ fprintf(stderr, "Usage: %s [-p <port>] [-c configFile] [-d/-e <string>] "
+ "[-r realm] [-u user]\n", applet_name);
+ exit(1);
}
#endif
-/* minimal global vars for busybox */
-#ifndef ENVSIZE
-#define ENVSIZE 50
+#ifdef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
+#undef CONFIG_FEATURE_HTTPD_SETUID /* use inetd user.group config settings */
+#undef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP /* so is not daemon */
+/* inetd set stderr to accepted socket and we can`t true see debug messages */
+#undef DEBUG
+#endif
+
+/* CGI environ size */
+#ifdef CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV
+#define ENVSIZE 50 /* set max 35 CGI_variable */
+#else
+#define ENVSIZE 15 /* minimal requires */
#endif
-int debugHttpd;
-static char **envp;
-static int envCount;
-static char *realm = "Web Server Authentication";
-static char *configFile;
+
+#define MAX_POST_SIZE (64*1024) /* 64k. Its Small? May be ;) */
+
+#define MAX_MEMORY_BUFF 8192 /* IO buffer */
+
+typedef struct HT_ACCESS {
+ char *after_colon;
+ struct HT_ACCESS *next;
+ char before_colon[1]; /* really bigger, must last */
+} Htaccess;
+
+typedef struct
+{
+#ifdef CONFIG_FEATURE_HTTPD_CGI
+ char *envp[ENVSIZE+1];
+ int envCount;
+#endif
+ char buf[MAX_MEMORY_BUFF];
+
+#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
+ const char *realm;
+#endif
+ const char *configFile;
+
+ char rmt_ip[16]; /* for set env REMOTE_ADDR */
+ unsigned port; /* server initial port and for
+ set env REMOTE_PORT */
+
+ const char *found_mime_type;
+ off_t ContentLength; /* -1 - unknown */
+ time_t last_mod;
+#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
+ int accepted_socket;
+#define a_c_r config->accepted_socket
+#define a_c_w config->accepted_socket
+ int debugHttpd; /* if seted, don`t stay daemon */
+#else
+#define a_c_r 0
+#define a_c_w 1
+#endif
+ Htaccess *Httpd_conf_parsed;
+} HttpdConfig;
+
+static HttpdConfig *config;
+
+static const char request_GET[] = "GET"; /* size algorithic optimize */
static const char* const suffixTable [] = {
+/* Warning: shorted equalent suffix in one line must be first */
".htm.html", "text/html",
".jpg.jpeg", "image/jpeg",
".gif", "image/gif",
".png", "image/png",
".txt.h.c.cc.cpp", "text/plain",
- 0,0
+ ".css", "text/css",
+ ".wav", "audio/wav",
+ ".avi", "video/x-msvideo",
+ ".qt.mov", "video/quicktime",
+ ".mpe.mpeg", "video/mpeg",
+ ".mid.midi", "audio/midi",
+ ".mp3", "audio/mpeg",
+#if 0 /* unpopular */
+ ".au", "audio/basic",
+ ".pac", "application/x-ns-proxy-autoconfig",
+ ".vrml.wrl", "model/vrml",
+#endif
+ 0, "application/octet-stream" /* default */
};
typedef enum
@@ -121,9 +275,10 @@ typedef enum
HTTP_OK = 200,
HTTP_UNAUTHORIZED = 401, /* authentication needed, respond with auth hdr */
HTTP_NOT_FOUND = 404,
+ HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
+ HTTP_BAD_REQUEST = 400, /* malformed syntax */
+ HTTP_FORBIDDEN = 403,
HTTP_INTERNAL_SERVER_ERROR = 500,
- HTTP_NOT_IMPLEMENTED = 501, /* used for unrecognized requests */
- HTTP_BAD_REQUEST = 400, /* malformed syntax */
#if 0 /* future use */
HTTP_CONTINUE = 100,
HTTP_SWITCHING_PROTOCOLS = 101,
@@ -136,7 +291,6 @@ typedef enum
HTTP_MOVED_TEMPORARILY = 302,
HTTP_NOT_MODIFIED = 304,
HTTP_PAYMENT_REQUIRED = 402,
- HTTP_FORBIDDEN = 403,
HTTP_BAD_GATEWAY = 502,
HTTP_SERVICE_UNAVAILABLE = 503, /* overload, maintenance */
HTTP_RESPONSE_SETSIZE=0xffffffff
@@ -152,15 +306,16 @@ typedef struct
static const HttpEnumString httpResponseNames[] = {
{ HTTP_OK, "OK" },
- { HTTP_NOT_IMPLEMENTED, "Not Implemented",
+ { HTTP_NOT_IMPLEMENTED, "Not Implemented",
"The requested method is not recognized by this server." },
{ HTTP_UNAUTHORIZED, "Unauthorized", "" },
{ HTTP_NOT_FOUND, "Not Found",
"The requested URL was not found on this server." },
+ { HTTP_BAD_REQUEST, "Bad Request" ,
+ "Unsupported method." },
+ { HTTP_FORBIDDEN, "Forbidden", "" },
{ HTTP_INTERNAL_SERVER_ERROR, "Internal Server Error"
"Internal Server Error" },
- { HTTP_BAD_REQUEST, "Bad Request" ,
- "Unsupported method.\n" },
#if 0
{ HTTP_CREATED, "Created" },
{ HTTP_ACCEPTED, "Accepted" },
@@ -169,12 +324,247 @@ static const HttpEnumString httpResponseNames[] = {
{ HTTP_MOVED_PERMANENTLY, "Moved Permanently" },
{ HTTP_MOVED_TEMPORARILY, "Moved Temporarily" },
{ HTTP_NOT_MODIFIED, "Not Modified" },
- { HTTP_FORBIDDEN, "Forbidden", "" },
{ HTTP_BAD_GATEWAY, "Bad Gateway", "" },
{ HTTP_SERVICE_UNAVAILABLE, "Service Unavailable", "" },
#endif
};
+
+static const char RFC1123FMT[] = "%a, %d %b %Y %H:%M:%S GMT";
+static const char Content_length[] = "Content-length:";
+
+
+/*
+ * sotring to:
+ * .ext:mime/type
+ * /path:user:pass
+ * /path/subdir:user:pass
+ * D:from
+ * A:from
+ * D:*
+ */
+static int conf_sort(const void *p1, const void *p2)
+{
+ const Htaccess *cl1 = *(const Htaccess **)p1;
+ const Htaccess *cl2 = *(const Htaccess **)p2;
+ char c1 = cl1->before_colon[0];
+ char c2 = cl2->before_colon[0];
+ int test;
+
+#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
+ /* .ext line up before other lines for simlify algorithm */
+ test = c2 == '.';
+ if(c1 == '.')
+ return -(!test);
+ if(test)
+ return test;
+#endif
+
+#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
+ test = c1 == '/';
+ /* /path line up before A/D lines for simlify algorithm */
+ if(test) {
+ if(c2 != '/')
+ return -test;
+ /* a shortes path with user:pass must be first */
+ return strlen(cl1->before_colon) - strlen(cl2->before_colon);
+ } else if(c2 == '/')
+ return !test;
+#endif
+
+ /* D:from must move top */
+ test = c2 == 'D' && cl2->after_colon[0] != 0;
+ if(c1 == 'D' && cl1->after_colon[0] != 0) {
+ return -(!test);
+ }
+ if(test)
+ return test;
+
+ /* next lines - A:from */
+ test = c2 == 'A' && cl2->after_colon[0] != 0;
+ if(c1 == 'A' && cl1->after_colon[0] != 0) {
+ return -(!test);
+ }
+ if(test)
+ return test;
+
+ /* end lines - D:* */
+ test = c2 == 'D' && cl2->after_colon[0] == 0;
+ if(c1 == 'D' && cl1->after_colon[0] == 0) {
+ return -(!test);
+ }
+#ifdef DEBUG
+ if(!test)
+ error_msg_and_die("sort: can`t found compares!");
+#endif
+ return test;
+}
+
+
+/* flag */
+#define FIRST_PARSE 0
+#define SUBDIR_PARSE 1
+#define SIGNALED_PARSE 2
+
+static void parse_conf(const char *path, int flag)
+{
+#define bc cur->before_colon[0]
+#define ac cur->after_colon[0]
+ FILE *f;
+ Htaccess *prev;
+ Htaccess *cur;
+ const char *cf = config->configFile;
+ char buf[80];
+ char *p0 = NULL;
+ int deny_all = 0; /* default A:* */
+ int n = 0; /* count config lines */
+
+ if(flag == SUBDIR_PARSE || cf == NULL) {
+ cf = p0 = alloca(strlen(path) + sizeof(httpd_conf) + 2);
+ if(p0 == NULL) {
+ if(flag == FIRST_PARSE)
+ error_msg_and_die(memory_exhausted);
+ return;
+ }
+ sprintf(p0, "%s/%s", path, httpd_conf);
+ }
+
+ while((f = fopen(cf, "r")) == NULL) {
+ if(flag != FIRST_PARSE)
+ return; /* subdir config not found */
+ if(p0 == NULL) /* if -c option gived */
+ perror_msg_and_die("%s", cf);
+ p0 = NULL;
+ cf = httpd_conf; /* set -c ./httpd_conf */
+ }
+
+ prev = config->Httpd_conf_parsed;
+ if(flag != SUBDIR_PARSE) {
+ /* free previous setuped */
+ while( prev ) {
+ cur = prev;
+ prev = cur->next;
+ free(cur);
+ }
+ config->Httpd_conf_parsed = prev; /* eq NULL */
+ } else {
+ /* parse previous IP logic for merge */
+ for(cur = prev; cur; cur = cur->next) {
+ if(bc == 'D' && ac == 0)
+ deny_all++;
+ n++;
+ /* find last for set prev->next of merging */
+ if(cur != prev)
+ prev = prev->next;
+ }
+ }
+
+ /* This could stand some work */
+ while ( (p0 = fgets(buf, 80, f)) != NULL) {
+ char *p;
+ char *colon;
+
+ for(p = colon = p0; *p; p++) {
+ if(*p == '#') {
+ *p = 0;
+ break;
+ }
+ if(isspace(*p)) {
+ if(p != p0) {
+ *p = 0;
+ break;
+ }
+ p0++;
+ }
+ else if(*p == ':' && colon <= p0)
+ colon = p;
+ }
+
+ /* test for empty or strange line */
+ if (colon <= p0 || colon[1] == 0)
+ continue;
+ if(colon[1] == '*')
+ colon[1] = 0; /* Allow all */
+ if(*p0 == 'a')
+ *p0 = 'A';
+ if(*p0 == 'd')
+ *p0 = 'D';
+ if(*p0 != 'A' && *p0 != 'D'
+#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
+ && *p0 != '/'
+#endif
+#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
+ && *p0 != '.'
+#endif
+ )
+ continue;
+#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
+ if(*p0 == '/' && colon[1] == 0) {
+ /* skip /path:* */
+ continue;
+ }
+#endif
+
+ if(*p0 == 'A' || *p0 == 'D') {
+ if(colon[1] == 0) {
+ if(*p0 == 'A' || deny_all != 0)
+ continue; /* skip default A:* or double D:* */
+ }
+ if(deny_all != 0 && *p0 == 'A')
+ continue; // if previous setted rule D:* skip all subdir A:
+ }
+
+ /* storing current config line */
+ cur = calloc(1, sizeof(Htaccess) + (p-p0));
+ if(cur) {
+ if(*(colon-1) == '/' && (colon-1) != p0)
+ colon[-1] = 0; // remove last / from /path/
+ cur->after_colon = strcpy(cur->before_colon, p0);
+ cur->after_colon += (colon-p0);
+ *cur->after_colon++ = 0;
+
+ if(prev == NULL) {
+ /* first line */
+ config->Httpd_conf_parsed = prev = cur;
+ } else {
+ prev->next = cur;
+ prev = cur;
+ }
+ n++;
+ }
+ }
+ fclose(f);
+
+ if(n > 1) {
+ /* sorting conf lines */
+ Htaccess ** pcur; /* array for qsort */
+
+ prev = config->Httpd_conf_parsed;
+ pcur = alloca((n + 1) * sizeof(Htaccess *));
+ if(pcur == NULL) {
+ if(flag == FIRST_PARSE)
+ error_msg_and_die(memory_exhausted);
+ return;
+ }
+ n = 0;
+ for(cur = prev; cur; cur = cur->next)
+ pcur[n++] = cur;
+ pcur[n] = NULL;
+
+ qsort(pcur, n, sizeof(Htaccess *), conf_sort);
+
+ /* storing sorted config */
+ config->Httpd_conf_parsed = *pcur;
+ for(cur = *pcur; cur; cur = cur->next) {
+#ifdef DEBUG
+ error_msg("%s: %s:%s", cf, cur->before_colon, cur->after_colon);
+#endif
+ cur->next = *++pcur;
+ }
+ }
+}
+
+#ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
/****************************************************************************
*
> $Function: encodeString()
@@ -197,20 +587,22 @@ static char *encodeString(const char *string)
/* take the simple route and encode everything */
/* could possibly scan once to get length. */
int len = strlen(string);
- char *out = (char*)malloc(len*5 +1);
+ char *out = malloc(len*5 +1);
char *p=out;
char ch;
+
if (!out) return "";
- while ((ch = *string++))
- {
+ while ((ch = *string++)) {
// very simple check for what to encode
if (isalnum(ch)) *p++ = ch;
- else p += sprintf(p,"&#%d", (unsigned char) ch);
+ else p += sprintf(p, "&#%d", (unsigned char) ch);
}
*p=0;
return out;
}
+#endif /* CONFIG_FEATURE_HTTPD_ENCODE_URL_STR */
+#ifdef CONFIG_FEATURE_HTTPD_DECODE_URL_STR
/****************************************************************************
*
> $Function: decodeString()
@@ -236,12 +628,11 @@ static char *decodeString(char *string)
char *ptr = string;
while (*ptr)
{
- if (*ptr == '+') { *string++ = ' '; ptr++; }
+ if (*ptr == '+') { *string++ = ' '; ptr++; }
else if (*ptr != '%') *string++ = *ptr++;
- else
- {
+ else {
unsigned int value;
- sscanf(ptr+1,"%2X",&value);
+ sscanf(ptr+1, "%2X", &value);
*string++ = value;
ptr += 3;
}
@@ -249,8 +640,10 @@ static char *decodeString(char *string)
*string = '\0';
return orig;
}
+#endif /* CONFIG_FEATURE_HTTPD_DECODE_URL_STR */
+#ifdef CONFIG_FEATURE_HTTPD_CGI
/****************************************************************************
*
> $Function: addEnv()
@@ -260,28 +653,47 @@ static char *decodeString(char *string)
* environment settings passed to the cgi execution script.
*
* $Parameters:
- * (char *) name . . . The environment variable name.
- * (char *) value . . The value to which the env variable is set.
+ * (char *) name_before_underline - The first part environment variable name.
+ * (char *) name_after_underline - The second part environment variable name.
+ * (char *) value . . The value to which the env variable is set.
*
- * $Return: (void)
+ * $Return: (void)
*
* $Errors: Silently returns if the env runs out of space to hold the new item
*
****************************************************************************/
-static void addEnv(const char *name, const char *value)
+static void addEnv(const char *name_before_underline,
+ const char *name_after_underline, const char *value)
{
char *s;
- if (envCount >= ENVSIZE) return;
- if (!value) value = "";
- s=(char*)malloc(strlen(name)+strlen(value)+2);
- if (s)
- {
- sprintf(s,"%s=%s",name, value);
- envp[envCount++]=s;
- envp[envCount]=0;
+
+ if (config->envCount >= ENVSIZE)
+ return;
+ if (!value)
+ value = "";
+ s = malloc(strlen(name_before_underline) + strlen(name_after_underline) +
+ strlen(value) + 3);
+ if (s) {
+ const char *underline = *name_after_underline ? "_" : "";
+
+ sprintf(s,"%s%s%s=%s", name_before_underline, underline,
+ name_after_underline, value);
+ config->envp[config->envCount++] = s;
+ config->envp[config->envCount] = 0;
}
}
+/* set environs SERVER_PORT and REMOTE_PORT */
+static void addEnvPort(const char *port_name)
+{
+ char buf[16];
+
+ sprintf(buf, "%u", config->port);
+ addEnv(port_name, "PORT", buf);
+}
+#endif /* CONFIG_FEATURE_HTTPD_CGI */
+
+#ifdef CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV
/****************************************************************************
*
> $Function: addEnvCgi
@@ -289,7 +701,8 @@ static void addEnv(const char *name, const char *value)
* $Description: Create environment variables given a URL encoded arg list.
* For each variable setting the URL encoded arg list, create a corresponding
* environment variable. URL encoded arguments have the form
- * name1=value1&name2=value2&name3=value3
+ * name1=value1&name2=value2&name3=&ignores
+ * from this example, name3 set empty value, tail without '=' skiping
*
* $Parameters:
* (char *) pargs . . . . A pointer to the URL encoded arguments.
@@ -302,65 +715,29 @@ static void addEnv(const char *name, const char *value)
static void addEnvCgi(const char *pargs)
{
char *args;
+ char *memargs;
if (pargs==0) return;
-
+
/* args are a list of name=value&name2=value2 sequences */
- args = strdup(pargs);
- while (args && *args)
- {
- char *sep;
- char *name=args;
- char *value=strchr(args,'=');
- char *cginame;
- if (!value) break;
- *value++=0;
- sep=strchr(value,'&');
- if (sep)
- {
- *sep=0;
- args=sep+1;
- }
- else
- {
- sep = value + strlen(value);
- args = 0; /* no more */
- }
- cginame=(char*)malloc(strlen(decodeString(name))+5);
- if (!cginame) break;
- sprintf(cginame,"CGI_%s",name);
- addEnv(cginame,decodeString(value));
- free(cginame);
+ memargs = args = strdup(pargs);
+ while (args && *args) {
+ const char *name = args;
+ char *value = strchr(args, '=');
+
+ if (!value) /* &XXX without '=' */
+ break;
+ *value++ = 0;
+ args = strchr(value, '&');
+ if (args)
+ *args++ = 0;
+ addEnv("CGI", name, decodeString(value));
}
+ free(memargs);
}
+#endif /* CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV */
-#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
-static const unsigned char base64ToBin[] = {
- 255 /* ' ' */, 255 /* '!' */, 255 /* '"' */, 255 /* '#' */,
- 1 /* '$' */, 255 /* '%' */, 255 /* '&' */, 255 /* ''' */,
- 255 /* '(' */, 255 /* ')' */, 255 /* '*' */, 62 /* '+' */,
- 255 /* ',' */, 255 /* '-' */, 255 /* '.' */, 63 /* '/' */,
- 52 /* '0' */, 53 /* '1' */, 54 /* '2' */, 55 /* '3' */,
- 56 /* '4' */, 57 /* '5' */, 58 /* '6' */, 59 /* '7' */,
- 60 /* '8' */, 61 /* '9' */, 255 /* ':' */, 255 /* ';' */,
- 255 /* '<' */, 00 /* '=' */, 255 /* '>' */, 255 /* '?' */,
- 255 /* '@' */, 00 /* 'A' */, 01 /* 'B' */, 02 /* 'C' */,
- 03 /* 'D' */, 04 /* 'E' */, 05 /* 'F' */, 06 /* 'G' */,
- 7 /* 'H' */, 8 /* 'I' */, 9 /* 'J' */, 10 /* 'K' */,
- 11 /* 'L' */, 12 /* 'M' */, 13 /* 'N' */, 14 /* 'O' */,
- 15 /* 'P' */, 16 /* 'Q' */, 17 /* 'R' */, 18 /* 'S' */,
- 19 /* 'T' */, 20 /* 'U' */, 21 /* 'V' */, 22 /* 'W' */,
- 23 /* 'X' */, 24 /* 'Y' */, 25 /* 'Z' */, 255 /* '[' */,
- 255 /* '\' */, 255 /* ']' */, 255 /* '^' */, 255 /* '_' */,
- 255 /* '`' */, 26 /* 'a' */, 27 /* 'b' */, 28 /* 'c' */,
- 29 /* 'd' */, 30 /* 'e' */, 31 /* 'f' */, 32 /* 'g' */,
- 33 /* 'h' */, 34 /* 'i' */, 35 /* 'j' */, 36 /* 'k' */,
- 37 /* 'l' */, 38 /* 'm' */, 39 /* 'n' */, 40 /* 'o' */,
- 41 /* 'p' */, 42 /* 'q' */, 43 /* 'r' */, 44 /* 's' */,
- 45 /* 't' */, 46 /* 'u' */, 47 /* 'v' */, 48 /* 'w' */,
- 49 /* 'x' */, 50 /* 'y' */, 51 /* 'z' */, 255 /* '{' */,
- 255 /* '|' */, 255 /* '}' */, 255 /* '~' */, 255 /* '' */
-};
+#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
/****************************************************************************
*
> $Function: decodeBase64()
@@ -370,186 +747,96 @@ static const unsigned char base64ToBin[] = {
* Since the decode always results in a shorter size than the input, it is
* OK to pass the input arg as an output arg.
*
- * $Parameters:
- * (void *) outData. . . Where to place the decoded data.
- * (size_t) outDataLen . The length of the output data string.
- * (void *) inData . . . A pointer to a base64 encoded string.
- * (size_t) inDataLen . The length of the input data string.
+ * $Parameter:
+ * (char *) Data . . . . A pointer to a base64 encoded string.
+ * Where to place the decoded data.
*
- * $Return: (char *) . . . . A pointer to the decoded string (same as input).
+ * $Return: void
*
* $Errors: None
*
****************************************************************************/
-static size_t decodeBase64(void *outData, size_t outDataLen,
- void *inData, size_t inDataLen)
+static void decodeBase64(char *Data)
{
int i = 0;
- unsigned char *in = inData;
- unsigned char *out = outData;
+ static const char base64ToBin[] =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+ const unsigned char *in = Data;
+ // The decoded size will be at most 3/4 the size of the encoded
unsigned long ch = 0;
- while (inDataLen && outDataLen)
- {
+
+ while (*in) {
unsigned char conv = 0;
- unsigned char newch;
-
- while (inDataLen)
- {
- inDataLen--;
- newch = *in++;
- if ((newch < '0') || (newch > 'z')) continue;
- conv = base64ToBin[newch - 32];
- if (conv == 255) continue;
+
+ while (*in) {
+ const char *p64;
+
+ p64 = strchr(base64ToBin, *in++);
+ if(p64 == NULL)
+ continue;
+ conv = (p64 - base64ToBin);
break;
}
ch = (ch << 6) | conv;
i++;
- if (i== 4)
- {
- if (outDataLen >= 3)
- {
- *(out++) = (unsigned char) (ch >> 16);
- *(out++) = (unsigned char) (ch >> 8);
- *(out++) = (unsigned char) ch;
- outDataLen-=3;
- }
-
+ if (i== 4) {
+ *Data++ = (char) (ch >> 16);
+ *Data++ = (char) (ch >> 8);
+ *Data++ = (char) ch;
i = 0;
}
-
- if ((inDataLen == 0) && (i != 0))
- {
- /* error - non multiple of 4 chars on input */
- break;
- }
-
}
-
- /* return the actual number of chars in output array */
- return out-(unsigned char*) outData;
+ *Data = 0;
}
#endif
-/****************************************************************************
- *
- > $Function: perror_and_exit()
- *
- > $Description: A helper function to print an error and exit.
- *
- * $Parameters:
- * (const char *) msg . . . A 'context' message to include.
- *
- * $Return: None
- *
- * $Errors: None
- *
- ****************************************************************************/
-static void perror_exit(const char *msg)
-{
- perror(msg);
- exit(1);
-}
-
-
-/****************************************************************************
- *
- > $Function: strncmpi()
- *
- * $Description: compare two strings without regard to case.
- *
- * $Parameters:
- * (char *) a . . . . . The first string.
- * (char *) b . . . . . The second string.
- * (int) n . . . . . . The number of chars to compare.
- *
- * $Return: (int) . . . . . . 0 if strings equal. 1 if a>b, -1 if b < a.
- *
- * $Errors: None
- *
- ****************************************************************************/
-#define __toupper(c) ((('a' <= (c))&&((c) <= 'z')) ? ((c) - 'a' + 'A') : (c))
-#define __tolower(c) ((('A' <= (c))&&((c) <= 'Z')) ? ((c) - 'A' + 'a') : (c))
-static int strncmpi(const char *a, const char *b,int n)
-{
- char a1,b1;
- a1 = b1 = 0;
-
- while(n-- && ((a1 = *a++) != '\0') && ((b1 = *b++) != '\0'))
- {
- if(a1 == b1) continue; /* No need to convert */
- a1 = __tolower(a1);
- b1 = __tolower(b1);
- if(a1 != b1) break; /* No match, abort */
- }
- if (n>=0)
- {
- if(a1 > b1) return 1;
- if(a1 < b1) return -1;
- }
- return 0;
-}
+#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
/****************************************************************************
*
> $Function: openServer()
*
* $Description: create a listen server socket on the designated port.
*
- * $Parameters:
- * (int) port . . . The port to listen on for connections.
- *
* $Return: (int) . . . A connection socket. -1 for errors.
*
* $Errors: None
*
****************************************************************************/
-static int openServer(int port)
+static int openServer(void)
{
struct sockaddr_in lsocket;
int fd;
-
+
/* create the socket right now */
/* inet_addr() returns a value that is already in network order */
memset(&lsocket, 0, sizeof(lsocket));
lsocket.sin_family = AF_INET;
lsocket.sin_addr.s_addr = INADDR_ANY;
- lsocket.sin_port = htons(port) ;
+ lsocket.sin_port = htons(config->port) ;
fd = socket(AF_INET, SOCK_STREAM, 0);
- if (fd >= 0)
- {
+ if (fd >= 0) {
/* tell the OS it's OK to reuse a previous address even though */
/* it may still be in a close down state. Allows bind to succeed. */
- int one = 1;
+ int on = 1;
#ifdef SO_REUSEPORT
- setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, (char*)&one, sizeof(one)) ;
+ setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, (void *)&on, sizeof(on)) ;
#else
- setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&one, sizeof(one)) ;
+ setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *)&on, sizeof(on)) ;
#endif
- if (bind(fd, (struct sockaddr *)&lsocket, sizeof(lsocket)) == 0)
- {
+ if (bind(fd, (struct sockaddr *)&lsocket, sizeof(lsocket)) == 0) {
listen(fd, 9);
signal(SIGCHLD, SIG_IGN); /* prevent zombie (defunct) processes */
+ } else {
+ perror_msg_and_die("bind");
}
- else
- {
- perror("failure to bind to server port");
- shutdown(fd,0);
- close(fd);
- fd = -1;
- }
- }
- else
- {
- fprintf(stderr,"httpd: unable to create socket \n");
- }
+ } else {
+ perror_msg_and_die("create socket");
+ }
return fd;
}
-
-static int sendBuf(int s, char *buf, int len)
-{
- if (len == -1) len = strlen(buf);
- return send(s, buf, len, 0);
-}
+#endif /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */
/****************************************************************************
*
@@ -558,84 +845,65 @@ static int sendBuf(int s, char *buf, int len)
* $Description: Create and send HTTP response headers.
* The arguments are combined and sent as one write operation. Note that
* IE will puke big-time if the headers are not sent in one packet and the
- * second packet is delayed for any reason. If contentType is null the
- * content type is assumed to be text/html
+ * second packet is delayed for any reason.
*
- * $Parameters:
- * (int) s . . . The http socket.
+ * $Parameter:
* (HttpResponseNum) responseNum . . . The result code to send.
- * (const char *) contentType . . . . A string indicating the type.
- * (int) contentLength . . . . . . . . Content length. -1 if unknown.
- * (time_t) expire . . . . . . . . . . Expiration time (secs since 1970)
*
- * $Return: (int) . . . . Always 0
- *
- * $Errors: None
+ * $Return: (int) . . . . writing errors
*
****************************************************************************/
-static int sendHeaders(int s, HttpResponseNum responseNum ,
- const char *contentType,
- int contentLength, time_t expire)
+static int sendHeaders(HttpResponseNum responseNum)
{
- char buf[1200];
+ char *buf = config->buf;
const char *responseString = "";
const char *infoString = 0;
unsigned int i;
time_t timer = time(0);
char timeStr[80];
- for (i=0;
- i < (sizeof(httpResponseNames)/sizeof(httpResponseNames[0])); i++)
- {
- if (httpResponseNames[i].type != responseNum) continue;
- responseString = httpResponseNames[i].name;
- infoString = httpResponseNames[i].info;
- break;
+ int len;
+
+ for (i = 0;
+ i < (sizeof(httpResponseNames)/sizeof(httpResponseNames[0])); i++) {
+ if (httpResponseNames[i].type == responseNum) {
+ responseString = httpResponseNames[i].name;
+ infoString = httpResponseNames[i].info;
+ break;
+ }
}
- if (infoString || !contentType)
- {
- contentType = "text/html";
+ if (responseNum != HTTP_OK) {
+ config->found_mime_type = "text/html"; // error message is HTML
}
-
- sprintf(buf, "HTTP/1.0 %d %s\nContent-type: %s\r\n",
- responseNum, responseString, contentType);
/* emit the current date */
- strftime(timeStr, sizeof(timeStr),
- "%a, %d %b %Y %H:%M:%S GMT",gmtime(&timer));
- sprintf(buf+strlen(buf), "Date: %s\r\n", timeStr);
- sprintf(buf+strlen(buf), "Connection: close\r\n");
- if (expire)
- {
- strftime(timeStr, sizeof(timeStr),
- "%a, %d %b %Y %H:%M:%S GMT",gmtime(&expire));
- sprintf(buf+strlen(buf), "Expire: %s\r\n", timeStr);
- }
+ strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&timer));
+ len = sprintf(buf,
+ "HTTP/1.0 %d %s\nContent-type: %s\r\n"
+ "Date: %s\r\nConnection: close\r\n",
+ responseNum, responseString, config->found_mime_type, timeStr);
- if (responseNum == HTTP_UNAUTHORIZED)
- {
- sprintf(buf+strlen(buf),
- "WWW-Authenticate: Basic realm=\"%s\"\r\n", realm);
+ if (responseNum == HTTP_UNAUTHORIZED) {
+ len += sprintf(buf+len, "WWW-Authenticate: Basic realm=\"%s\"\r\n",
+ config->realm);
}
- if (contentLength != -1)
- {
- int len = strlen(buf);
- sprintf(buf+len,"Content-length: %d\r\n", contentLength);
+ if (config->ContentLength != -1) { /* file */
+ strftime(timeStr, sizeof(timeStr), RFC1123FMT, gmtime(&config->last_mod));
+ len += sprintf(buf+len, "Last-Modified: %s\r\n%s %ld\r\n",
+ timeStr, Content_length, config->ContentLength);
}
- strcat(buf,"\r\n");
- if (infoString)
- {
- sprintf(buf+strlen(buf),
+ strcat(buf, "\r\n");
+ len += 2;
+ if (infoString) {
+ len += sprintf(buf+len,
"<HEAD><TITLE>%d %s</TITLE></HEAD>\n"
"<BODY><H1>%d %s</H1>\n%s\n</BODY>\n",
responseNum, responseString,
- responseNum, responseString,
- infoString);
+ responseNum, responseString, infoString);
}
#ifdef DEBUG
- if (debugHttpd) fprintf(stderr,"Headers:'%s'", buf);
+ if (config->debugHttpd) fprintf(stderr, "Headers: '%s'", buf);
#endif
- sendBuf(s, buf,-1);
- return 0;
+ return full_write(a_c_w, buf, len);
}
/****************************************************************************
@@ -647,30 +915,29 @@ static int sendHeaders(int s, HttpResponseNum responseNum ,
* Characters are read one at a time until an eol sequence is found.
*
* $Parameters:
- * (int) s . . . . . The socket fildes.
* (char *) buf . . Where to place the read result.
- * (int) maxBuf . . Maximum number of chars to fit in buf.
*
* $Return: (int) . . . . number of characters read. -1 if error.
*
****************************************************************************/
-static int getLine(int s, char *buf, int maxBuf)
+static int getLine(char *buf)
{
int count = 0;
- while (recv(s, buf+count, 1, 0) == 1)
- {
+
+ while (read(a_c_r, buf + count, 1) == 1) {
if (buf[count] == '\r') continue;
- if (buf[count] == '\n')
- {
+ if (buf[count] == '\n') {
buf[count] = 0;
return count;
}
- count++;
+ if(count < (MAX_MEMORY_BUFF-1)) /* check owerflow */
+ count++;
}
if (count) return count;
else return -1;
}
+#ifdef CONFIG_FEATURE_HTTPD_CGI
/****************************************************************************
*
> $Function: sendCgi()
@@ -682,193 +949,215 @@ static int getLine(int s, char *buf, int maxBuf)
* data in addition to setting the QUERY_STRING variable (for GETs or POSTs).
*
* $Parameters:
- * (int ) s . . . . . . . . The session socket.
* (const char *) url . . . The requested URL (with leading /).
* (const char *urlArgs). . Any URL arguments.
* (const char *body) . . . POST body contents.
* (int bodyLen) . . . . . Length of the post body.
-
+ * (const char *cookie) . . For set HTTP_COOKIE.
+
*
* $Return: (char *) . . . . A pointer to the decoded string (same as input).
*
* $Errors: None
*
****************************************************************************/
-static int sendCgi(int s, const char *url,
- const char *request, const char *urlArgs,
- const char *body, int bodyLen)
+static int sendCgi(const char *url,
+ const char *request, const char *urlArgs,
+ const char *body, int bodyLen, const char *cookie)
{
int fromCgi[2]; /* pipe for reading data from CGI */
int toCgi[2]; /* pipe for sending data to CGI */
-
- char *argp[] = { 0, 0 };
- int pid=0;
- int inFd=inFd;
+
+ static char * argp[] = { 0, 0 };
+ int pid = 0;
+ int inFd;
int outFd;
- int firstLine=1;
+ int firstLine = 1;
- do
- {
- if (pipe(fromCgi) != 0)
- {
+ do {
+ if (pipe(fromCgi) != 0) {
break;
}
- if (pipe(toCgi) != 0)
- {
+ if (pipe(toCgi) != 0) {
break;
}
pid = fork();
- if (pid < 0)
- {
+ if (pid < 0) {
pid = 0;
- break;;
+ break;
}
-
- if (!pid)
- {
+
+ if (!pid) {
/* child process */
char *script;
- char *directory;
- inFd=toCgi[0];
- outFd=fromCgi[1];
+ char *purl = strdup( url );
+ char realpath_buff[MAXPATHLEN];
+
+ if(purl == NULL)
+ _exit(242);
+
+ inFd = toCgi[0];
+ outFd = fromCgi[1];
dup2(inFd, 0); // replace stdin with the pipe
dup2(outFd, 1); // replace stdout with the pipe
- if (!debugHttpd) dup2(outFd, 2); // replace stderr with the pipe
+
+#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
+ if (!config->debugHttpd)
+#endif
+ dup2(outFd, 2); // replace stderr with the pipe
+
close(toCgi[0]);
close(toCgi[1]);
close(fromCgi[0]);
close(fromCgi[1]);
-#if 0
- fcntl(0,F_SETFD, 1);
- fcntl(1,F_SETFD, 1);
- fcntl(2,F_SETFD, 1);
-#endif
-
- script = (char*) malloc(strlen(url)+2);
- if (!script) _exit(242);
- sprintf(script,".%s",url);
-
- envCount=0;
- addEnv("SCRIPT_NAME",script);
- addEnv("REQUEST_METHOD",request);
- addEnv("QUERY_STRING",urlArgs);
- addEnv("SERVER_SOFTWARE",httpdVersion);
- if (strncmpi(request,"POST",4)==0) addEnvCgi(body);
- else addEnvCgi(urlArgs);
-
/*
- * Most HTTP servers chdir to the cgi directory.
+ * Find PATH_INFO.
*/
- while (*url == '/') url++; // skip leading slash(s)
- directory = strdup( url );
- if ( directory == (char*) 0 )
- script = (char*) (url); /* ignore errors */
- else
- {
- script = strrchr( directory, '/' );
- if ( script == (char*) 0 )
- script = directory;
- else
- {
- *script++ = '\0';
- (void) chdir( directory ); /* ignore errors */
+ script = purl;
+ while((script = strchr( script + 1, '/' )) != NULL) {
+ /* have script.cgi/PATH_INFO or dirs/script.cgi[/PATH_INFO] */
+ struct stat sb;
+
+ *script = '\0';
+ if(is_directory(purl + 1, 1, &sb) == 0) {
+ /* not directory, found script.cgi/PATH_INFO */
+ *script = '/';
+ break;
}
+ *script = '/'; /* is directory, find next '/' */
+ }
+ addEnv("PATH", "INFO", script); /* set /PATH_INFO or NULL */
+ addEnv("PATH", "", getenv("PATH"));
+ addEnv("REQUEST", "METHOD", request);
+ if(urlArgs) {
+ char *uri = alloca(strlen(purl) + 2 + strlen(urlArgs));
+ if(uri)
+ sprintf(uri, "%s?%s", purl, urlArgs);
+ addEnv("REQUEST", "URI", uri);
+ } else {
+ addEnv("REQUEST", "URI", purl);
+ }
+ if(script != NULL)
+ *script = '\0'; /* reduce /PATH_INFO */
+ /* set SCRIPT_NAME as full path: /cgi-bin/dirs/script.cgi */
+ addEnv("SCRIPT_NAME", "", purl);
+ addEnv("QUERY_STRING", "", urlArgs);
+ addEnv("SERVER", "SOFTWARE", httpdVersion);
+ addEnv("SERVER", "PROTOCOL", "HTTP/1.0");
+ addEnv("GATEWAY_INTERFACE", "", "CGI/1.1");
+#ifdef CONFIG_FEATURE_HTTPD_SET_REMOTE_PORT_TO_ENV
+ addEnv("REMOTE", "ADDR", config->rmt_ip);
+ addEnvPort("REMOTE");
+#else
+ addEnv("REMOTE_ADDR", "", config->rmt_ip);
+#endif
+ if(bodyLen) {
+ char sbl[32];
+
+ sprintf(sbl, "%d", bodyLen);
+ addEnv("CONTENT_LENGTH", "", sbl);
+ }
+ if(cookie)
+ addEnv("HTTP_COOKIE", "", cookie);
+
+#ifdef CONFIG_FEATURE_HTTPD_SET_CGI_VARS_TO_ENV
+ if (request != request_GET) {
+ addEnvCgi(body);
+ } else {
+ addEnvCgi(urlArgs);
}
+#endif
+
+ /* set execve argp[0] without path */
+ argp[0] = strrchr( purl, '/' ) + 1;
+ /* but script argp[0] must have absolute path and chdiring to this */
+ if(realpath(purl + 1, realpath_buff) != NULL) {
+ script = strrchr(realpath_buff, '/');
+ if(script) {
+ *script = '\0';
+ if(chdir(realpath_buff) == 0) {
+ *script = '/';
// now run the program. If it fails, use _exit() so no destructors
// get called and make a mess.
- execve(script, argp, envp);
-
-#ifdef DEBUG
- fprintf(stderr, "exec failed\n");
+ execve(realpath_buff, argp, config->envp);
+ }
+ }
+ }
+#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
+ config->accepted_socket = 1; /* send to stdout */
#endif
- close(2);
- close(1);
- close(0);
+ sendHeaders(HTTP_NOT_FOUND);
_exit(242);
} /* end child */
+ } while (0);
+
+ if (pid) {
/* parent process */
- inFd=fromCgi[0];
- outFd=toCgi[1];
+ int status;
+
+ inFd = fromCgi[0];
+ outFd = toCgi[1];
close(fromCgi[1]);
close(toCgi[0]);
- if (body) write(outFd, body, bodyLen);
+ if (body) full_write(outFd, body, bodyLen);
close(outFd);
- } while (0);
-
- if (pid)
- {
- int status;
- pid_t dead_pid;
-
- while (1)
- {
+ while (1) {
struct timeval timeout;
fd_set readSet;
char buf[160];
int nfound;
int count;
-
+
FD_ZERO(&readSet);
FD_SET(inFd, &readSet);
-
+
/* Now wait on the set of sockets! */
timeout.tv_sec = 0;
timeout.tv_usec = 10000;
- nfound = select(inFd+1, &readSet, 0, 0, &timeout);
+ nfound = select(inFd + 1, &readSet, 0, 0, &timeout);
- if (nfound <= 0)
- {
- dead_pid = waitpid(pid, &status, WNOHANG);
- if (dead_pid != 0)
- {
- close(fromCgi[0]);
- close(fromCgi[1]);
- close(toCgi[0]);
- close(toCgi[1]);
+ if (nfound <= 0) {
+ if (waitpid(pid, &status, WNOHANG) > 0) {
+ close(inFd);
#ifdef DEBUG
- if (debugHttpd)
- {
+ if (config->debugHttpd) {
if (WIFEXITED(status))
- fprintf(stderr,"piped has exited with status=%d\n", WEXITSTATUS(status));
+ error_msg("piped has exited with status=%d", WEXITSTATUS(status));
if (WIFSIGNALED(status))
- fprintf(stderr,"piped has exited with signal=%d\n", WTERMSIG(status));
+ error_msg("piped has exited with signal=%d", WTERMSIG(status));
}
-#endif
+#endif
pid = -1;
break;
}
- }
- else
- {
+ } else {
+ int s = a_c_w;
+
// There is something to read
- count = read(inFd,buf,sizeof(buf)-1);
+ count = full_read(inFd, buf, sizeof(buf)-1);
// If a read returns 0 at this point then some type of error has
// occurred. Bail now.
if (count == 0) break;
- if (count > 0)
- {
- if (firstLine)
- {
+ if (count > 0) {
+ if (firstLine) {
/* check to see if the user script added headers */
- if (strcmp(buf,"HTTP")!= 0)
- {
- write(s,"HTTP/1.0 200 OK\n", 16);
+ if (strncmp(buf, "HTTP/1.0 200 OK\n", 4) != 0) {
+ full_write(s, "HTTP/1.0 200 OK\n", 16);
}
- if (strstr(buf,"ontent-") == 0)
- {
- write(s,"Content-type: text/plain\n\n", 26);
+ if (strstr(buf, "ontent-") == 0) {
+ full_write(s, "Content-type: text/plain\n\n", 26);
}
-
firstLine=0;
}
- write(s,buf,count);
+ full_write(s, buf, count);
#ifdef DEBUG
- if (debugHttpd) fprintf(stderr,"cgi read %d bytes\n", count);
+ if (config->debugHttpd)
+ fprintf(stderr, "cgi read %d bytes\n", count);
#endif
}
}
@@ -876,6 +1165,7 @@ static int sendCgi(int s, const char *url,
}
return 0;
}
+#endif /* CONFIG_FEATURE_HTTPD_CGI */
/****************************************************************************
*
@@ -883,55 +1173,66 @@ static int sendCgi(int s, const char *url,
*
* $Description: Send a file response to an HTTP request
*
- * $Parameters:
- * (int) s . . . . . . . The http session socket.
+ * $Parameter:
* (const char *) url . . The URL requested.
+ * (char *) buf . . . . . The stack buffer.
*
* $Return: (int) . . . . . . Always 0.
*
****************************************************************************/
-static int sendFile(int s, const char *url)
+static int sendFile(const char *url, char *buf)
{
- char *suffix = strrchr(url,'.');
- const char *content = "application/octet-stream";
+ char * suffix;
int f;
+ const char * const * table;
+ const char * try_suffix;
- if (suffix)
- {
- const char ** table;
- for (table = (const char **) &suffixTable[0];
- *table && (strstr(*table, suffix) == 0); table+=2);
- if (table) content = *(table+1);
+ suffix = strrchr(url, '.');
+
+ for (table = suffixTable; *table; table += 2)
+ if(suffix != NULL && (try_suffix = strstr(*table, suffix)) != 0) {
+ try_suffix += strlen(suffix);
+ if(*try_suffix == 0 || *try_suffix == '.')
+ break;
+ }
+ /* also, if not found, set default as "application/octet-stream"; */
+ config->found_mime_type = *(table+1);
+#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
+ if (suffix) {
+ Htaccess * cur;
+
+ for (cur = config->Httpd_conf_parsed; cur; cur = cur->next) {
+ if(strcmp(cur->before_colon, suffix) == 0) {
+ config->found_mime_type = cur->after_colon;
+ break;
+ }
+ }
}
-
- if (*url == '/') url++;
- suffix = strchr(url,'?');
- if (suffix) *suffix = 0;
+#endif /* CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES */
#ifdef DEBUG
- fprintf(stderr,"Sending file '%s'\n", url);
+ if (config->debugHttpd)
+ fprintf(stderr, "Sending file '%s' Content-type: %s\n",
+ url, config->found_mime_type);
#endif
-
- f = open(url,O_RDONLY, 0444);
- if (f >= 0)
- {
- char buf[1450];
- int count;
- sendHeaders(s, HTTP_OK, content, -1, 0 );
- while ((count = read(f, buf, sizeof(buf))))
- {
- sendBuf(s, buf, count);
- }
- close(f);
- }
- else
- {
+
+ f = open(url, O_RDONLY);
+ if (f >= 0) {
+ int count;
+
+ sendHeaders(HTTP_OK);
+ while ((count = full_read(f, buf, MAX_MEMORY_BUFF)) > 0) {
+ full_write(a_c_w, buf, count);
+ }
+ close(f);
+ } else {
#ifdef DEBUG
- fprintf(stderr,"Unable to open '%s'\n", url);
+ if (config->debugHttpd)
+ perror_msg("Unable to open '%s'", url);
#endif
- sendHeaders(s, HTTP_NOT_FOUND, "text/html", -1, 0);
+ sendHeaders(HTTP_NOT_FOUND);
}
-
+
return 0;
}
@@ -941,93 +1242,85 @@ static int sendFile(int s, const char *url)
*
* $Description: Check the permission file for access.
*
- * Both IP addresses as well as url pathnames can be specified. If an IP
- * address check is desired, the 'path' should be specified as "ip" and the
- * dotted decimal IP address placed in request.
- *
- * For url pathnames, place the url (with leading /) in 'path' and any
- * authentication information in request. e.g. "user:pass"
- *
- *******
- *
- * Keep the algorithm simple.
* If config file isn't present, everything is allowed.
- * Run down /etc/httpd.hosts a line at a time.
- * Stop if match is found.
- * Entries are of the form:
- * ip:10.10 # any address that begins with 10.10
- * dir:user:pass # dir security for dirs that start with 'dir'
- *
- * httpd.conf has the following format:
- * ip:10.10. # Allow any address that begins with 10.10.
- * ip:172.20. # Allow 172.20.x.x
- * /cgi-bin:foo:bar # Require user foo, pwd bar on urls starting with /cgi-bin
- * /:foo:bar # Require user foo, pwd bar on urls starting with /
- *
- * To open up the server:
- * ip:* # Allow any IP address
- * /:* # no password required for urls starting with / (all)
+ * Entries are of the form you can see example from header source
*
* $Parameters:
- * (const char *) path . . . . The file path or "ip" for ip addresses.
+ * (const char *) path . . . . The file path or NULL for ip addresses.
* (const char *) request . . . User information to validate.
*
* $Return: (int) . . . . . . . . . 1 if request OK, 0 otherwise.
*
****************************************************************************/
+
+
static int checkPerm(const char *path, const char *request)
{
- FILE *f=NULL;
- int rval;
- char buf[80];
- char *p;
- int ipaddr=0;
-
- /* If httpd.conf not there assume anyone can get in */
- if (configFile) f = fopen(configFile,"r");
- if(f == NULL) f = fopen("/etc/httpd.conf","r");
- if(f == NULL) f = fopen("httpd.conf","r");
- if(f == NULL) {
- return(1);
- }
- if (strcmp("ip",path) == 0) ipaddr=1;
+ Htaccess * cur;
+ const char *p;
- rval=0;
+#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
+ int ipaddr = path == NULL;
+ const char *prev = NULL;
+#else
+# define ipaddr 1
+#endif
/* This could stand some work */
- while ( fgets(buf, 80, f) != NULL)
- {
- if(buf[0] == '#') continue;
- if(buf[0] == '\0') continue;
- for(p = buf + (strlen(buf) - 1); p >= buf; p--)
- {
- if(isspace(*p)) *p = 0;
- }
-
- p = strchr(buf,':');
- if (!p) continue;
- *p++=0;
+ for (cur = config->Httpd_conf_parsed; cur; cur = cur->next) {
+ const char *p0 = cur->before_colon;
+
+ if(*p0 == 'A' || *p0 == 'D') {
+ if(!ipaddr)
+ continue;
+ } else {
+ if(ipaddr)
+ continue;
+#ifdef CONFIG_FEATURE_HTTPD_CONFIG_WITH_MIME_TYPES
+ if(*p0 == '.')
+ continue;
+#endif
+#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
+ if(prev != NULL && strcmp(prev, p0) != 0)
+ continue; /* find next identical */
+#endif
+ }
+
+ p = cur->after_colon;
#ifdef DEBUG
- fprintf(stderr,"checkPerm: '%s' ? '%s'\n",buf,path);
+ if (config->debugHttpd)
+ fprintf(stderr,"checkPerm: '%s' ? '%s'\n",
+ (ipaddr ? p : p0), request);
#endif
- if((ipaddr ? strcmp(buf,path) : strncmp(buf, path, strlen(buf))) == 0)
- {
- /* match found. Check request */
- if ((strcmp("*",p) == 0) ||
- (strcmp(p, request) == 0) ||
- (ipaddr && (strncmp(p, request, strlen(p)) == 0)))
- {
- rval = 1;
- break;
- }
+ if(ipaddr) {
+ if(strncmp(p, request, strlen(p)) != 0)
+ continue;
+ return *p0 == 'A'; /* Allow/Deny */
- /* reject on first failure for non ipaddresses */
- if (!ipaddr) break;
}
- };
- fclose(f);
- return(rval);
-};
+#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
+ else {
+ int l = strlen(p0);
+
+ if(strncmp(p0, path, l) == 0 &&
+ (l == 1 || path[l] == '/' || path[l] == 0)) {
+ /* path match found. Check request */
+ if (strcmp(p, request) == 0)
+ return 1; /* Ok */
+ /* unauthorized, but check next /path:user:password */
+ prev = p0;
+ }
+ }
+#endif
+ } /* for */
+
+#ifndef CONFIG_FEATURE_HTTPD_BASIC_AUTH
+ /* if uncofigured, return 1 - access from all */
+ return 1;
+#else
+ return prev == NULL;
+#endif
+}
/****************************************************************************
@@ -1036,156 +1329,242 @@ static int checkPerm(const char *path, const char *request)
*
* $Description: Handle an incoming http request.
*
- * $Parameters:
- * (s) s . . . . . The http request socket.
- *
- * $Return: (int) . . . Always 0.
- *
****************************************************************************/
-static int handleIncoming(int s)
+static void handleIncoming(void)
{
- char buf[8192];
- char url[8192]; /* hold args too initially */
- char credentials[80];
- char request[20];
- long length=0;
- int major;
- int minor;
+ char *buf = config->buf;
+ char *url;
+ char *purl;
+ int blank = -1;
char *urlArgs;
- char *body=0;
+#ifdef CONFIG_FEATURE_HTTPD_CGI
+ const char *prequest = request_GET;
+ char *body = 0;
+ long length=0;
+ char *cookie = 0;
+#endif
+ char *test;
+ struct stat sb;
- credentials[0] = 0;
- do
- {
- int count = getLine(s, buf, sizeof(buf));
- int blank;
- if (count <= 0) break;
- count = sscanf(buf, "%9s %1000s HTTP/%d.%d", request,
- url, &major, &minor);
-
- if (count < 2)
- {
- /* Garbled request/URL */
-#if 0
- genHttpHeader(&requestInfo,
- HTTP_BAD_REQUEST, requestInfo.dataType,
- HTTP_LENGTH_UNKNOWN);
+#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
+ int credentials = -1; /* if not requred this is Ok */
#endif
+
+ do {
+ int count;
+
+ if (getLine(buf) <= 0)
+ break; /* closed */
+
+ purl = strpbrk(buf, " \t");
+ if(purl == NULL) {
+BAD_REQUEST:
+ sendHeaders(HTTP_BAD_REQUEST);
break;
}
-
- /* If no version info, assume 0.9 */
- if (count != 4)
- {
- major = 0;
- minor = 9;
+ *purl = 0;
+#ifdef CONFIG_FEATURE_HTTPD_CGI
+ if(strcasecmp(buf, prequest) != 0) {
+ prequest = "POST";
+ if(strcasecmp(buf, prequest) != 0) {
+ sendHeaders(HTTP_NOT_IMPLEMENTED);
+ break;
+ }
+ }
+#else
+ if(strcasecmp(buf, request_GET) != 0) {
+ sendHeaders(HTTP_NOT_IMPLEMENTED);
+ break;
}
+#endif
+ *purl = ' ';
+ count = sscanf(purl, " %[^ ] HTTP/%d.%*d", buf, &blank);
+ if (count < 1 || buf[0] != '/') {
+ /* Garbled request/URL */
+ goto BAD_REQUEST;
+ }
+ url = alloca(strlen(buf) + 12); /* + sizeof("/index.html\0") */
+ if(url == NULL) {
+ sendHeaders(HTTP_INTERNAL_SERVER_ERROR);
+ break;
+ }
+ strcpy(url, buf);
/* extract url args if present */
- urlArgs = strchr(url,'?');
- if (urlArgs)
- {
- *urlArgs=0;
- urlArgs++;
+ urlArgs = strchr(url, '?');
+ if (urlArgs) {
+ *urlArgs++ = 0; /* next code can set '/' to this pointer,
+ but CGI script can`t be a directory */
+ }
+
+ /* algorithm stolen from libbb simplify_path(),
+ but don`t strdup and reducing trailing slash */
+ purl = test = url;
+
+ do {
+ if (*purl == '/') {
+ if (*test == '/') { /* skip duplicate (or initial) slash */
+ continue;
+ } else if (*test == '.') {
+ if (test[1] == '/' || test[1] == 0) { /* skip extra '.' */
+ continue;
+ } else if ((test[1] == '.') && (test[2] == '/' || test[2] == 0)) {
+ ++test;
+ if (purl == url) {
+ /* protect out root */
+ goto BAD_REQUEST;
+ }
+ while (*--purl != '/'); /* omit previous dir */
+ continue;
+ }
+ }
+ }
+ *++purl = *test;
+ } while (*++test);
+
+ *++purl = 0; /* so keep last character */
+ test = purl; /* end ptr */
+
+ /* If URL is directory, adding '/' */
+ if(test[-1] != '/') {
+ if ( is_directory(url + 1, 1, &sb) ) {
+ *test++ = '/';
+ *test = 0;
+ purl = test; /* end ptr */
+ }
}
-
#ifdef DEBUG
- if (debugHttpd) fprintf(stderr,"url='%s', args=%s\n", url, urlArgs);
-#endif
-
- // read until blank line(s)
- blank = 0;
- while ((count = getLine(s, buf, sizeof(buf))) >= 0)
- {
- if (count == 0)
- {
- if (major > 0) break;
- blank++;
- if (blank == 2) break;
- }
+ if (config->debugHttpd)
+ fprintf(stderr, "url='%s', args=%s\n", url, urlArgs);
+#endif
+
+ test = url;
+ while((test = strchr( test + 1, '/' )) != NULL) {
+ /* have path1/path2 */
+ *test = '\0';
+ if( is_directory(url + 1, 1, &sb) ) {
+ /* may be having subdir config */
+ parse_conf(url + 1, SUBDIR_PARSE);
+ }
+ *test = '/';
+ }
+
+ // read until blank line for HTTP version specified, else parse immediate
+ while (blank >= 0 && (count = getLine(buf)) > 0) {
+
#ifdef DEBUG
- if (debugHttpd) fprintf(stderr,"Header: '%s'\n", buf);
-#endif
+ if (config->debugHttpd) fprintf(stderr, "Header: '%s'\n", buf);
+#endif
+#ifdef CONFIG_FEATURE_HTTPD_CGI
/* try and do our best to parse more lines */
- if ((strncmpi(buf, "Content-length:", 15) == 0))
- {
- sscanf(buf, "%*s %ld", &length);
- }
+ if ((strncasecmp(buf, Content_length, 15) == 0)) {
+ if(prequest != request_GET)
+ length = strtol(buf + 15, 0, 0); // extra read only for POST
+ } else if ((strncasecmp(buf, "Cookie:", 7) == 0)) {
+ for(test = buf + 7; isspace(*test); test++)
+ ;
+ cookie = strdup(test);
+ }
+#endif
+
#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
- else if (strncmpi(buf, "Authorization:", 14) == 0)
- {
+ if (strncasecmp(buf, "Authorization:", 14) == 0) {
/* We only allow Basic credentials.
* It shows up as "Authorization: Basic <userid:password>" where
* the userid:password is base64 encoded.
*/
- char *ptr = buf+14;
- while (*ptr == ' ') ptr++;
- if (strncmpi(ptr, "Basic", 5) != 0) break;
- ptr += 5;
- while (*ptr == ' ') ptr++;
- memset(credentials, 0, sizeof(credentials));
- decodeBase64(credentials,
- sizeof(credentials)-1,
- ptr,
- strlen(ptr) );
-
+ for(test = buf + 14; isspace(*test); test++)
+ ;
+ if (strncasecmp(test, "Basic", 5) != 0)
+ continue;
+
+ test += 5; /* decodeBase64() skiping space self */
+ decodeBase64(test);
+ credentials = checkPerm(url, test);
}
+#endif /* CONFIG_FEATURE_HTTPD_BASIC_AUTH */
+
+ } /* while extra header reading */
+
+
+ if (strcmp(strrchr(url, '/') + 1, httpd_conf) == 0 ||
+ checkPerm(NULL, config->rmt_ip) == 0) {
+ /* protect listing [/path]/httpd_conf or IP deny */
+#ifdef CONFIG_FEATURE_HTTPD_CGI
+FORBIDDEN: /* protect listing /cgi-bin */
+#endif
+ sendHeaders(HTTP_FORBIDDEN);
+ break;
}
- if (!checkPerm(url, credentials))
- {
- sendHeaders(s, HTTP_UNAUTHORIZED, 0, -1, 0);
- length=-1;
- break; /* no more processing */
- }
-#else
+
+#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
+ if (credentials <= 0 && checkPerm(url, ":") == 0) {
+ sendHeaders(HTTP_UNAUTHORIZED);
+ break;
}
-#endif /* CONFIG_FEATURE_HTTPD_BASIC_AUTH */
+#endif
- /* we are done if an error occurred */
- if (length == -1) break;
+ test = url + 1; /* skip first '/' */
- if (strcmp(url,"/") == 0) strcpy(url,"/index.html");
+#ifdef CONFIG_FEATURE_HTTPD_CGI
+ /* if strange Content-Length */
+ if (length < 0 || length > MAX_POST_SIZE)
+ break;
- if (length>0)
- {
- body=(char*) malloc(length+1);
- if (body)
- {
- length = read(s,body,length);
- body[length]=0; // always null terminate for safety
- urlArgs=body;
+ if (length > 0) {
+ body = malloc(length + 1);
+ if (body) {
+ length = full_read(a_c_r, body, length);
+ if(length < 0) // closed
+ length = 0;
+ body[length] = 0; // always null terminate for safety
+ urlArgs = body;
}
}
-
- if (strstr(url,"..") || strstr(url, "httpd.conf"))
- {
- /* protect from .. path creep */
- sendHeaders(s, HTTP_NOT_FOUND, "text/html", -1, 0);
- }
- else if (strstr(url,"cgi-bin"))
- {
- sendCgi(s, url, request, urlArgs, body, length);
- }
- else if (strncmpi(request,"GET",3) == 0)
- {
- sendFile(s, url);
- }
- else
- {
- sendHeaders(s, HTTP_NOT_IMPLEMENTED, 0, -1, 0);
+
+ if (strncmp(test, "cgi-bin", 7) == 0) {
+ if(test[7] == 0 || (test[7] == '/' && test[8] == 0))
+ goto FORBIDDEN; // protect listing cgi-bin
+ sendCgi(url, prequest, urlArgs, body, length, cookie);
+ } else {
+ if (prequest != request_GET)
+ sendHeaders(HTTP_NOT_IMPLEMENTED);
+ else {
+#endif /* CONFIG_FEATURE_HTTPD_CGI */
+ if(purl[-1] == '/')
+ strcpy(purl, "index.html");
+ if ( stat(test, &sb ) == 0 ) {
+ config->ContentLength = sb.st_size;
+ config->last_mod = sb.st_mtime;
+ }
+ sendFile(test, buf);
+#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
+ /* unset if non inetd looped */
+ config->ContentLength = -1;
+#endif
+
+#ifdef CONFIG_FEATURE_HTTPD_CGI
+ }
}
+#endif
+
} while (0);
-#ifdef DEBUG
- if (debugHttpd) fprintf(stderr,"closing socket\n");
-#endif
- if (body) free(body);
- shutdown(s,SHUT_WR);
- shutdown(s,SHUT_RD);
- close(s);
-
- return 0;
+
+#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
+/* from inetd don`t looping: freeing, closing automatic from exit always */
+# ifdef DEBUG
+ if (config->debugHttpd) fprintf(stderr, "closing socket\n");
+# endif
+# ifdef CONFIG_FEATURE_HTTPD_CGI
+ free(body);
+ free(cookie);
+# endif
+ shutdown(a_c_w, SHUT_WR);
+ shutdown(a_c_r, SHUT_RD);
+ close(config->accepted_socket);
+#endif /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */
}
/****************************************************************************
@@ -1203,24 +1582,23 @@ static int handleIncoming(int s)
* $Return: (int) . . . . Always 0.
*
****************************************************************************/
+#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
static int miniHttpd(int server)
{
fd_set readfd, portfd;
int nfound;
-
+
FD_ZERO(&portfd);
FD_SET(server, &portfd);
-
+
/* copy the ports we are watching to the readfd set */
- while (1)
- {
- readfd = portfd ;
-
+ while (1) {
+ readfd = portfd;
+
/* Now wait INDEFINATELY on the set of sockets! */
- nfound = select(server+1, &readfd, 0, 0, 0);
-
- switch (nfound)
- {
+ nfound = select(server + 1, &readfd, 0, 0, 0);
+
+ switch (nfound) {
case 0:
/* select timeout error! */
break ;
@@ -1228,48 +1606,41 @@ static int miniHttpd(int server)
/* select error */
break;
default:
- if (FD_ISSET(server, &readfd))
- {
- char on;
+ if (FD_ISSET(server, &readfd)) {
+ int on;
struct sockaddr_in fromAddr;
- char rmt_ip[20];
- int addr;
+
+ unsigned int addr;
socklen_t fromAddrLen = sizeof(fromAddr);
int s = accept(server,
- (struct sockaddr *)&fromAddr, &fromAddrLen) ;
- if (s < 0)
- {
+ (struct sockaddr *)&fromAddr, &fromAddrLen);
+
+ if (s < 0) {
continue;
}
+ config->accepted_socket = s;
addr = ntohl(fromAddr.sin_addr.s_addr);
- sprintf(rmt_ip,"%u.%u.%u.%u",
- (unsigned char)(addr >> 24),
- (unsigned char)(addr >> 16),
- (unsigned char)(addr >> 8),
- (unsigned char)(addr >> 0));
+ sprintf(config->rmt_ip, "%u.%u.%u.%u",
+ (unsigned char)(addr >> 24),
+ (unsigned char)(addr >> 16),
+ (unsigned char)(addr >> 8),
+ addr & 0xff);
+ config->port = ntohs(fromAddr.sin_port);
#ifdef DEBUG
- if (debugHttpd)
- {
- fprintf(stderr,"httpMini.cpp: connection from IP=%s, port %d\n",
- rmt_ip, ntohs(fromAddr.sin_port));
+ if (config->debugHttpd) {
+ error_msg("connection from IP=%s, port %u\n",
+ config->rmt_ip, config->port);
}
-#endif
- if(checkPerm("ip", rmt_ip) == 0)
- {
- close(s);
- continue;
- }
-
+#endif
/* set the KEEPALIVE option to cull dead connections */
on = 1;
- setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (char *) &on,
- sizeof (on));
+ setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (void *)&on, sizeof (on));
- if (fork() == 0)
- {
+ if (config->debugHttpd || fork() == 0) {
/* This is the spawned thread */
- handleIncoming(s);
- exit(0);
+ handleIncoming();
+ if(!config->debugHttpd)
+ exit(0);
}
close(s);
}
@@ -1278,72 +1649,169 @@ static int miniHttpd(int server)
return 0;
}
+#else
+ /* from inetd */
+
+static int miniHttpd(void)
+{
+ struct sockaddr_in fromAddrLen;
+ socklen_t sinlen = sizeof (struct sockaddr_in);
+ unsigned int addr;
+
+ getpeername (0, (struct sockaddr *)&fromAddrLen, &sinlen);
+ addr = ntohl(fromAddrLen.sin_addr.s_addr);
+ sprintf(config->rmt_ip, "%u.%u.%u.%u",
+ (unsigned char)(addr >> 24),
+ (unsigned char)(addr >> 16),
+ (unsigned char)(addr >> 8),
+ addr & 0xff);
+ config->port = ntohs(fromAddrLen.sin_port);
+ handleIncoming();
+ return 0;
+}
+#endif /* CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY */
+
+#ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
+static void sighup_handler(int sig)
+{
+ /* set and reset */
+ struct sigaction sa;
+
+ sa.sa_handler = sighup_handler;
+ sigemptyset(&sa.sa_mask);
+ sa.sa_flags = SA_RESTART;
+ sigaction(SIGHUP, &sa, NULL);
+ parse_conf(default_patch_httpd_conf,
+ sig == SIGHUP ? SIGNALED_PARSE : FIRST_PARSE);
+}
+#endif
+
+#ifdef HTTPD_STANDALONE
+int main(int argc, char *argv[])
+#else
int httpd_main(int argc, char *argv[])
+#endif
{
+ const char *home_httpd = home;
+
+#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
int server;
- int port = 80;
- int c;
-
+#endif
+
+#ifdef CONFIG_FEATURE_HTTPD_SETUID
+ long uid = -1;
+#endif
+
+ config = xcalloc(1, sizeof(*config));
+#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
+ config->realm = "Web Server Authentication";
+#endif
+
+#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
+ config->port = 80;
+#endif
+
+ config->ContentLength = -1;
+
/* check if user supplied a port number */
for (;;) {
- c = getopt( argc, argv, "p:ve:d:"
+ int c = getopt( argc, argv, "c:h:"
+#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
+ "p:v"
+#endif
+#ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
+ "e:"
+#endif
+#ifdef CONFIG_FEATURE_HTTPD_DECODE_URL_STR
+ "d:"
+#endif
#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
- "r:c:"
+ "r:"
+#endif
+#ifdef CONFIG_FEATURE_HTTPD_SETUID
+ "u:"
#endif
);
if (c == EOF) break;
switch (c) {
+ case 'c':
+ config->configFile = optarg;
+ break;
+ case 'h':
+ home_httpd = optarg;
+ break;
+#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
case 'v':
- debugHttpd=1;
+ config->debugHttpd = 1;
break;
case 'p':
- port = atoi(optarg);
+ config->port = atoi(optarg);
+ if(config->port <= 0 || config->port > 0xffff)
+ error_msg_and_die("invalid %s for -p", optarg);
break;
+#endif
+#ifdef CONFIG_FEATURE_HTTPD_DECODE_URL_STR
case 'd':
- printf("%s",decodeString(optarg));
+ printf("%s", decodeString(optarg));
return 0;
+#endif
+#ifdef CONFIG_FEATURE_HTTPD_ENCODE_URL_STR
case 'e':
- printf("%s",encodeString(optarg));
+ printf("%s", encodeString(optarg));
return 0;
+#endif
+#ifdef CONFIG_FEATURE_HTTPD_BASIC_AUTH
case 'r':
- realm = optarg;
+ config->realm = optarg;
break;
- case 'c':
- configFile = optarg;
+#endif
+#ifdef CONFIG_FEATURE_HTTPD_SETUID
+ case 'u':
+ {
+ char *e;
+
+ uid = strtol(optarg, &e, 0);
+ if(*e != '\0') {
+ /* not integer */
+ uid = my_getpwnam(optarg);
+ }
+ }
break;
+#endif
default:
- fprintf(stderr,"%s\n", httpdVersion);
+ error_msg("%s", httpdVersion);
show_usage();
- exit(1);
}
}
- envp = (char**) malloc((ENVSIZE+1)*sizeof(char*));
- if (envp == 0) perror_exit("envp alloc");
-
- server = openServer(port);
- if (server < 0) exit(1);
-
- if (!debugHttpd)
- {
- /* remember our current pwd, daemonize, chdir back */
- char *dir = (char *) malloc(256);
- if (dir == 0) perror_exit("out of memory for getpwd");
- if (getcwd(dir, 256) == 0) perror_exit("getcwd failed");
- if (daemon(0, 1) < 0) perror_exit("daemon");
- chdir(dir);
- free(dir);
+ if(chdir(home_httpd)) {
+ perror_msg_and_die("can`t chdir to %s", home_httpd);
}
+#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
+ server = openServer();
+# ifdef CONFIG_FEATURE_HTTPD_SETUID
+ /* drop privilegies */
+ if(uid > 0)
+ setuid(uid);
+# endif
+# ifdef CONFIG_FEATURE_HTTPD_CGI
+ addEnvPort("SERVER");
+# endif
+#endif
- miniHttpd(server);
-
- return 0;
-}
-
-#ifdef HTTPD_STANDALONE
-int main(int argc, char *argv[])
-{
- return httpd_main(argc, argv);
-}
+#ifdef CONFIG_FEATURE_HTTPD_RELOAD_CONFIG_SIGHUP
+ sighup_handler(0);
+#else
+ parse_conf(default_patch_httpd_conf, FIRST_PARSE);
+#endif
+#ifndef CONFIG_FEATURE_HTTPD_USAGE_FROM_INETD_ONLY
+ if (!config->debugHttpd) {
+ if (daemon(1, 0) < 0) /* don`t change curent directory */
+ perror_msg_and_die("daemon");
+ }
+ return miniHttpd(server);
+#else
+ return miniHttpd();
#endif
+}
diff --git a/networking/inetd.c b/networking/inetd.c
new file mode 100644
index 000000000..047358c90
--- /dev/null
+++ b/networking/inetd.c
@@ -0,0 +1,1280 @@
+/*
+ * Copyright (c) 1983,1991 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * David A. Holland.
+ *
+ * Busybox port by Vladimir Oleynik (C) 2001-2003 <dzo@simtreas.ru>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+/*
+ * Inetd - Internet super-server
+ *
+ * This program invokes all internet services as needed.
+ * connection-oriented services are invoked each time a
+ * connection is made, by creating a process. This process
+ * is passed the connection as file descriptor 0 and is
+ * expected to do a getpeername to find out the source host
+ * and port.
+ *
+ * Datagram oriented services are invoked when a datagram
+ * arrives; a process is created and passed a pending message
+ * on file descriptor 0. Datagram servers may either connect
+ * to their peer, freeing up the original socket for inetd
+ * to receive further messages on, or ``take over the socket'',
+ * processing all arriving datagrams and, eventually, timing
+ * out. The first type of server is said to be ``multi-threaded'';
+ * the second type of server ``single-threaded''.
+ *
+ * Inetd uses a configuration file which is read at startup
+ * and, possibly, at some later time in response to a hangup signal.
+ * The configuration file is ``free format'' with fields given in the
+ * order shown below. Continuation lines for an entry must being with
+ * a space or tab. All fields must be present in each entry.
+ *
+ * service name must be in /etc/services
+ * socket type stream/dgram/raw/rdm/seqpacket
+ * protocol must be in /etc/protocols
+ * wait/nowait[.max] single-threaded/multi-threaded, max #
+ * user[.group] user/group to run daemon as
+ * server program full path name
+ * server program arguments maximum of MAXARGS (20)
+ *
+ * RPC services unsuported
+ *
+ * Comment lines are indicated by a `#' in column 1.
+ */
+
+/*
+ * Here's the scoop concerning the user.group feature:
+ *
+ * 1) No group listed.
+ *
+ * a) for root: NO setuid() or setgid() is done
+ *
+ * b) nonroot: setuid()
+ * setgid(primary group as found in passwd)
+ * initgroups(name, primary group)
+ *
+ * 2) set-group-option on.
+ *
+ * a) for root: NO setuid()
+ * setgid(specified group)
+ * setgroups(1, specified group)
+ *
+ * b) nonroot: setuid()
+ * setgid(specified group)
+ * initgroups(name, specified group)
+ *
+ * All supplementary groups are discarded at startup in case inetd was
+ * run manually.
+ */
+
+#define __USE_BSD_SIGNAL
+
+#include "busybox.h"
+
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/file.h>
+#include <sys/wait.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+
+#ifndef __linux__
+#ifndef RLIMIT_NOFILE
+#define RLIMIT_NOFILE RLIMIT_OFILE
+#endif
+#endif
+
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/file.h>
+#include <sys/wait.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <arpa/inet.h>
+
+#include <errno.h>
+#include <signal.h>
+#include <netdb.h>
+#include <syslog.h>
+#include <pwd.h>
+#include <grp.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <unistd.h>
+#include <stdarg.h>
+
+#define _PATH_INETDCONF "/etc/inetd.conf"
+#define _PATH_INETDPID "/var/run/inetd.pid"
+
+#ifndef MIN
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#endif
+
+#define TOOMANY 40 /* don't start more than TOOMANY */
+#define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
+#define RETRYTIME (60*10) /* retry after bind or server fail */
+
+#ifndef OPEN_MAX
+#define OPEN_MAX 64
+#endif
+
+
+/* Reserve some descriptors, 3 stdio + at least: 1 log, 1 conf. file */
+#define FD_MARGIN (8)
+static int rlim_ofile_cur = OPEN_MAX;
+
+#ifdef RLIMIT_NOFILE
+static struct rlimit rlim_ofile;
+#endif
+
+
+static struct servtab {
+ char *se_service; /* name of service */
+ int se_socktype; /* type of socket to use */
+ int se_family; /* address family */
+ char *se_proto; /* protocol used */
+ short se_wait; /* single threaded server */
+ short se_checked; /* looked at during merge */
+ char *se_user; /* user name to run as */
+ char *se_group; /* group name to run as */
+#ifndef INETD_UNSUPPORT_BILTIN
+ const struct biltin *se_bi; /* if built-in, description */
+#endif
+ char *se_server; /* server program */
+#define MAXARGV 20
+ char *se_argv[MAXARGV+1]; /* program arguments */
+ int se_fd; /* open descriptor */
+ union {
+ struct sockaddr se_un_ctrladdr;
+ struct sockaddr_in se_un_ctrladdr_in;
+ struct sockaddr_un se_un_ctrladdr_un;
+ } se_un; /* bound address */
+#define se_ctrladdr se_un.se_un_ctrladdr
+#define se_ctrladdr_in se_un.se_un_ctrladdr_in
+#define se_ctrladdr_un se_un.se_un_ctrladdr_un
+ int se_ctrladdr_size;
+ int se_max; /* max # of instances of this service */
+ int se_count; /* number started since se_time */
+ struct timeval se_time; /* start of se_count */
+ struct servtab *se_next;
+} *servtab;
+
+/* Length of socket listen queue. Should be per-service probably. */
+static int global_queuelen = 128;
+
+static int nsock, maxsock;
+static fd_set allsock;
+static int timingout;
+static sigset_t blockmask, emptymask;
+
+
+#define INETD_UNSUPPORT_BILTIN 1
+
+ /* Echo received data */
+#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO
+#undef INETD_UNSUPPORT_BILTIN
+static void echo_stream(int, struct servtab *);
+static void echo_dg(int, struct servtab *);
+#endif
+ /* Internet /dev/null */
+#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD
+#undef INETD_UNSUPPORT_BILTIN
+static void discard_stream(int, struct servtab *);
+static void discard_dg(int, struct servtab *);
+#endif
+ /* Return 32 bit time since 1900 */
+#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME
+#undef INETD_UNSUPPORT_BILTIN
+static void machtime_stream(int, struct servtab *);
+static void machtime_dg(int, struct servtab *);
+#endif
+ /* Return human-readable time */
+#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME
+#undef INETD_UNSUPPORT_BILTIN
+static void daytime_stream(int, struct servtab *);
+static void daytime_dg(int, struct servtab *);
+#endif
+ /* Familiar character generator */
+#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
+#undef INETD_UNSUPPORT_BILTIN
+static void chargen_stream(int, struct servtab *);
+static void chargen_dg(int, struct servtab *);
+#endif
+
+#ifndef INETD_UNSUPPORT_BILTIN
+struct biltin {
+ const char *bi_service; /* internally provided service name */
+ int bi_socktype; /* type of socket supported */
+ short bi_fork; /* 1 if should fork before call */
+ short bi_wait; /* 1 if should wait for child */
+ void (*bi_fn)(int, struct servtab *); /* fn which performs it */
+};
+
+static const struct biltin biltins[] = {
+#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO
+ /* Echo received data */
+ { "echo", SOCK_STREAM, 1, 0, echo_stream, },
+ { "echo", SOCK_DGRAM, 0, 0, echo_dg, },
+#endif
+#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD
+ /* Internet /dev/null */
+ { "discard", SOCK_STREAM, 1, 0, discard_stream, },
+ { "discard", SOCK_DGRAM, 0, 0, discard_dg, },
+#endif
+#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME
+ /* Return 32 bit time since 1900 */
+ { "time", SOCK_STREAM, 0, 0, machtime_stream, },
+ { "time", SOCK_DGRAM, 0, 0, machtime_dg, },
+#endif
+#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME
+ /* Return human-readable time */
+ { "daytime", SOCK_STREAM, 0, 0, daytime_stream, },
+ { "daytime", SOCK_DGRAM, 0, 0, daytime_dg, },
+#endif
+#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
+ /* Familiar character generator */
+ { "chargen", SOCK_STREAM, 1, 0, chargen_stream, },
+ { "chargen", SOCK_DGRAM, 0, 0, chargen_dg, },
+#endif
+ { NULL, 0, 0, 0, NULL }
+};
+#endif /* INETD_UNSUPPORT_BILTIN */
+
+#define NUMINT (sizeof(intab) / sizeof(struct inent))
+static const char *CONFIG = _PATH_INETDCONF;
+
+#define BCOPY(s, d, z) memcpy(d, s, z)
+
+static void
+syslog_err_and_discard_dg(int se_socktype, const char *msg, ...)
+ __attribute__ ((noreturn, format (printf, 2, 3)));
+
+static void
+syslog_err_and_discard_dg(int se_socktype, const char *msg, ...)
+{
+ char buf[50];
+ va_list p;
+
+ va_start(p, msg);
+ vsyslog(LOG_ERR, msg, p);
+ if (se_socktype != SOCK_STREAM)
+ recv(0, buf, sizeof (buf), 0);
+ _exit(1);
+}
+
+static FILE *fconfig;
+static char line[256];
+
+static FILE *
+setconfig(void)
+{
+ FILE *f = fconfig;
+
+ if (f != NULL) {
+ fseek(f, 0L, L_SET);
+ } else {
+ f = fconfig = fopen(CONFIG, "r");
+ if(f == NULL)
+ syslog(LOG_ERR, "%s: %m", CONFIG);
+ }
+ return f;
+}
+
+static char *
+nextline(void)
+{
+ char *cp;
+ FILE *fd = fconfig;
+
+ if (fgets(line, sizeof (line), fd) == NULL)
+ return ((char *)0);
+ cp = strchr(line, '\n');
+ if (cp)
+ *cp = '\0';
+ return (line);
+}
+
+static char *
+skip(char **cpp)
+{
+ char *cp = *cpp;
+ char *start;
+
+ if (*cpp == NULL)
+ return ((char *)0);
+
+again:
+ while (*cp == ' ' || *cp == '\t')
+ cp++;
+ if (*cp == '\0') {
+ int c;
+
+ c = getc(fconfig);
+ (void) ungetc(c, fconfig);
+ if (c == ' ' || c == '\t')
+ if ((cp = nextline()) != NULL)
+ goto again;
+ *cpp = NULL;
+ return NULL;
+ }
+ start = cp;
+ while (*cp && *cp != ' ' && *cp != '\t')
+ cp++;
+ if (*cp != '\0')
+ *cp++ = '\0';
+ *cpp = cp;
+ return (start);
+}
+
+static char *
+newstr(char *cp)
+{
+ cp = strdup(cp ? cp : "");
+ if (cp)
+ return(cp);
+
+ syslog_err_and_discard_dg(SOCK_STREAM, "strdup: %m");
+}
+
+
+static struct servtab *
+getconfigent(void)
+{
+ static struct servtab serv;
+ struct servtab *sep = &serv;
+ int argc;
+ char *cp, *arg;
+
+more:
+ while ((cp = nextline()) && *cp == '#')
+ ;
+ if (cp == NULL)
+ return ((struct servtab *)0);
+ memset((char *)sep, 0, sizeof *sep);
+ sep->se_service = newstr(skip(&cp));
+ arg = skip(&cp);
+ if (arg == NULL)
+ goto more;
+
+ if (strcmp(arg, "stream") == 0)
+ sep->se_socktype = SOCK_STREAM;
+ else if (strcmp(arg, "dgram") == 0)
+ sep->se_socktype = SOCK_DGRAM;
+ else if (strcmp(arg, "rdm") == 0)
+ sep->se_socktype = SOCK_RDM;
+ else if (strcmp(arg, "seqpacket") == 0)
+ sep->se_socktype = SOCK_SEQPACKET;
+ else if (strcmp(arg, "raw") == 0)
+ sep->se_socktype = SOCK_RAW;
+ else
+ sep->se_socktype = -1;
+
+ sep->se_proto = newstr(skip(&cp));
+ if (strcmp(sep->se_proto, "unix") == 0) {
+ sep->se_family = AF_UNIX;
+ } else {
+ sep->se_family = AF_INET;
+ if (strncmp(sep->se_proto, "rpc/", 4) == 0) {
+ syslog(LOG_ERR, "%s: rpc services not suported",
+ sep->se_service);
+ goto more;
+ }
+ }
+ arg = skip(&cp);
+ if (arg == NULL)
+ goto more;
+ {
+ char *s = strchr(arg, '.');
+ if (s) {
+ *s++ = '\0';
+ sep->se_max = atoi(s);
+ } else
+ sep->se_max = TOOMANY;
+ }
+ sep->se_wait = strcmp(arg, "wait") == 0;
+ sep->se_user = newstr(skip(&cp));
+ sep->se_group = strchr(sep->se_user, '.');
+ if (sep->se_group) {
+ *sep->se_group++ = '\0';
+ }
+ sep->se_server = newstr(skip(&cp));
+ if (strcmp(sep->se_server, "internal") == 0) {
+#ifndef INETD_UNSUPPORT_BILTIN
+ const struct biltin *bi;
+
+ for (bi = biltins; bi->bi_service; bi++)
+ if (bi->bi_socktype == sep->se_socktype &&
+ strcmp(bi->bi_service, sep->se_service) == 0)
+ break;
+ if (bi->bi_service == 0) {
+ syslog(LOG_ERR, "internal service %s unknown",
+ sep->se_service);
+ goto more;
+ }
+ sep->se_bi = bi;
+ sep->se_wait = bi->bi_wait;
+#else
+ syslog(LOG_ERR, "internal service %s unknown",
+ sep->se_service);
+ goto more;
+#endif
+ } else
+#ifndef INETD_UNSUPPORT_BILTIN
+ sep->se_bi = NULL
+#endif
+ ;
+ argc = 0;
+ for (arg = skip(&cp); cp; arg = skip(&cp)) {
+ if (argc < MAXARGV)
+ sep->se_argv[argc++] = newstr(arg);
+ }
+ while (argc <= MAXARGV)
+ sep->se_argv[argc++] = NULL;
+ return (sep);
+}
+
+static void
+freeconfig(struct servtab *cp)
+{
+ int i;
+
+ free(cp->se_service);
+ free(cp->se_proto);
+ free(cp->se_user);
+ /* Note: se_group is part of the newstr'ed se_user */
+ free(cp->se_server);
+ for (i = 0; i < MAXARGV; i++)
+ free(cp->se_argv[i]);
+}
+
+#ifndef INETD_UNSUPPORT_BILTIN
+static char **Argv;
+static char *LastArg;
+
+static void
+setproctitle(char *a, int s)
+{
+ size_t size;
+ char *cp;
+ struct sockaddr_in sn;
+ char buf[80];
+
+ cp = Argv[0];
+ size = sizeof(sn);
+ if (getpeername(s, (struct sockaddr *)&sn, &size) == 0)
+ (void) sprintf(buf, "-%s [%s]", a, inet_ntoa(sn.sin_addr));
+ else
+ (void) sprintf(buf, "-%s", a);
+ strncpy(cp, buf, LastArg - cp);
+ cp += strlen(cp);
+ while (cp < LastArg)
+ *cp++ = ' ';
+}
+#endif /* INETD_UNSUPPORT_BILTIN */
+
+static struct servtab *
+enter(struct servtab *cp)
+{
+ struct servtab *sep;
+ sigset_t oldmask;
+
+ sep = (struct servtab *)malloc(sizeof (*sep));
+ if (sep == NULL) {
+ syslog_err_and_discard_dg(SOCK_STREAM, memory_exhausted);
+ }
+ *sep = *cp;
+ sep->se_fd = -1;
+ sigprocmask(SIG_BLOCK, &blockmask, &oldmask);
+ sep->se_next = servtab;
+ servtab = sep;
+ sigprocmask(SIG_SETMASK, &oldmask, NULL);
+ return (sep);
+}
+
+static int
+bump_nofile(void)
+{
+#ifdef RLIMIT_NOFILE
+
+#define FD_CHUNK 32
+
+ struct rlimit rl;
+
+ if (getrlimit(RLIMIT_NOFILE, &rl) < 0) {
+ syslog(LOG_ERR, "getrlimit: %m");
+ return -1;
+ }
+ rl.rlim_cur = MIN(rl.rlim_max, rl.rlim_cur + FD_CHUNK);
+ if (rl.rlim_cur <= rlim_ofile_cur) {
+ syslog(LOG_ERR,
+ "bump_nofile: cannot extend file limit, max = %d",
+ rl.rlim_cur);
+ return -1;
+ }
+
+ if (setrlimit(RLIMIT_NOFILE, &rl) < 0) {
+ syslog(LOG_ERR, "setrlimit: %m");
+ return -1;
+ }
+
+ rlim_ofile_cur = rl.rlim_cur;
+ return 0;
+
+#else
+ syslog(LOG_ERR, "bump_nofile: cannot extend file limit");
+ return -1;
+#endif
+}
+
+
+static void
+setup(struct servtab *sep)
+{
+ int on = 1;
+
+ if ((sep->se_fd = socket(sep->se_family, sep->se_socktype, 0)) < 0) {
+ syslog(LOG_ERR, "%s/%s: socket: %m",
+ sep->se_service, sep->se_proto);
+ return;
+ }
+ if (setsockopt(sep->se_fd, SOL_SOCKET, SO_REUSEADDR, (void *)&on,
+ sizeof(on)) < 0)
+ syslog(LOG_ERR, "setsockopt (SO_REUSEADDR): %m");
+ if (bind(sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size) < 0) {
+ syslog(LOG_ERR, "%s/%s: bind: %m",
+ sep->se_service, sep->se_proto);
+ (void) close(sep->se_fd);
+ sep->se_fd = -1;
+ if (!timingout) {
+ timingout = 1;
+ alarm(RETRYTIME);
+ }
+ return;
+ }
+ if (sep->se_socktype == SOCK_STREAM)
+ listen(sep->se_fd, global_queuelen);
+
+ FD_SET(sep->se_fd, &allsock);
+ nsock++;
+ if (sep->se_fd > maxsock) {
+ maxsock = sep->se_fd;
+ if (maxsock > rlim_ofile_cur - FD_MARGIN)
+ bump_nofile();
+ }
+}
+
+static void
+config(int signum)
+{
+ struct servtab *sep, *cp, **sepp;
+ sigset_t oldmask;
+ unsigned n;
+
+ (void)signum;
+ if (setconfig() == NULL)
+ return;
+
+ for (sep = servtab; sep; sep = sep->se_next)
+ sep->se_checked = 0;
+ while ((cp = getconfigent()) != NULL) {
+ for (sep = servtab; sep; sep = sep->se_next)
+ if (strcmp(sep->se_service, cp->se_service) == 0 &&
+ strcmp(sep->se_proto, cp->se_proto) == 0)
+ break;
+ if (sep != 0) {
+ int i;
+
+#define SWAP(type, a, b) {type c=(type)a; (type)a=(type)b; (type)b=(type)c;}
+
+ sigprocmask(SIG_BLOCK, &emptymask, &oldmask);
+ /*
+ * sep->se_wait may be holding the pid of a daemon
+ * that we're waiting for. If so, don't overwrite
+ * it unless the config file explicitly says don't
+ * wait.
+ */
+ if (
+#ifndef INETD_UNSUPPORT_BILTIN
+ cp->se_bi == 0 &&
+#endif
+ (sep->se_wait == 1 || cp->se_wait == 0))
+ sep->se_wait = cp->se_wait;
+ if (cp->se_max != sep->se_max)
+ SWAP(int, cp->se_max, sep->se_max);
+ if (cp->se_user)
+ SWAP(char *, sep->se_user, cp->se_user);
+ if (cp->se_group)
+ SWAP(char *, sep->se_group, cp->se_group);
+ if (cp->se_server)
+ SWAP(char *, sep->se_server, cp->se_server);
+ for (i = 0; i < MAXARGV; i++)
+ SWAP(char *, sep->se_argv[i], cp->se_argv[i]);
+#undef SWAP
+ sigprocmask(SIG_SETMASK, &oldmask, NULL);
+ freeconfig(cp);
+ } else {
+ sep = enter(cp);
+ }
+ sep->se_checked = 1;
+
+ switch (sep->se_family) {
+ case AF_UNIX:
+ if (sep->se_fd != -1)
+ break;
+ (void)unlink(sep->se_service);
+ n = strlen(sep->se_service);
+ if (n > sizeof(sep->se_ctrladdr_un.sun_path) - 1)
+ n = sizeof(sep->se_ctrladdr_un.sun_path) - 1;
+ strncpy(sep->se_ctrladdr_un.sun_path, sep->se_service, n);
+ sep->se_ctrladdr_un.sun_family = AF_UNIX;
+ sep->se_ctrladdr_size = n +
+ sizeof sep->se_ctrladdr_un.sun_family;
+ setup(sep);
+ break;
+ case AF_INET:
+ sep->se_ctrladdr_in.sin_family = AF_INET;
+ sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in;
+ {
+ u_short port = htons(atoi(sep->se_service));
+
+ if (!port) {
+ struct servent *sp;
+ sp = getservbyname(sep->se_service,
+ sep->se_proto);
+ if (sp == 0) {
+ syslog(LOG_ERR,
+ "%s/%s: unknown service",
+ sep->se_service, sep->se_proto);
+ continue;
+ }
+ port = sp->s_port;
+ }
+ if (port != sep->se_ctrladdr_in.sin_port) {
+ sep->se_ctrladdr_in.sin_port = port;
+ if (sep->se_fd != -1) {
+ FD_CLR(sep->se_fd, &allsock);
+ nsock--;
+ (void) close(sep->se_fd);
+ }
+ sep->se_fd = -1;
+ }
+ if (sep->se_fd == -1)
+ setup(sep);
+ }
+ }
+ }
+ if (fconfig) {
+ (void) fclose(fconfig);
+ fconfig = NULL;
+ }
+ /*
+ * Purge anything not looked at above.
+ */
+ sigprocmask(SIG_SETMASK, &blockmask, &oldmask);
+ sepp = &servtab;
+ while ((sep = *sepp) != NULL) {
+ if (sep->se_checked) {
+ sepp = &sep->se_next;
+ continue;
+ }
+ *sepp = sep->se_next;
+ if (sep->se_fd != -1) {
+ FD_CLR(sep->se_fd, &allsock);
+ nsock--;
+ (void) close(sep->se_fd);
+ }
+ if (sep->se_family == AF_UNIX)
+ (void)unlink(sep->se_service);
+ freeconfig(sep);
+ free((char *)sep);
+ }
+ sigprocmask(SIG_SETMASK, &oldmask, NULL);
+}
+
+
+
+static void
+reapchild(int signum)
+{
+ int status;
+ int pid;
+ struct servtab *sep;
+
+ (void)signum;
+ for (;;) {
+ pid = wait3(&status, WNOHANG, (struct rusage *)0);
+ if (pid <= 0)
+ break;
+ for (sep = servtab; sep; sep = sep->se_next)
+ if (sep->se_wait == pid) {
+ if (WIFEXITED(status) && WEXITSTATUS(status))
+ syslog(LOG_WARNING,
+ "%s: exit status 0x%x",
+ sep->se_server, WEXITSTATUS(status));
+ else if (WIFSIGNALED(status))
+ syslog(LOG_WARNING,
+ "%s: exit signal 0x%x",
+ sep->se_server, WTERMSIG(status));
+ sep->se_wait = 1;
+ FD_SET(sep->se_fd, &allsock);
+ nsock++;
+ }
+ }
+}
+
+static void
+retry(int signum)
+{
+ struct servtab *sep;
+
+ (void)signum;
+ timingout = 0;
+ for (sep = servtab; sep; sep = sep->se_next) {
+ if (sep->se_fd == -1) {
+ switch (sep->se_family) {
+ case AF_UNIX:
+ case AF_INET:
+ setup(sep);
+ break;
+ }
+ }
+ }
+}
+
+static void
+goaway(int signum)
+{
+ struct servtab *sep;
+
+ (void)signum;
+ for (sep = servtab; sep; sep = sep->se_next)
+ if (sep->se_fd != -1 && sep->se_family == AF_UNIX)
+ (void)unlink(sep->se_service);
+ (void)unlink(_PATH_INETDPID);
+ exit(0);
+}
+
+
+
+extern int
+inetd_main(int argc, char *argv[])
+{
+ struct servtab *sep;
+ struct passwd *pwd;
+ struct group *grp = NULL;
+ struct sigaction sa;
+ int ch, pid;
+ gid_t gid;
+
+#ifdef INETD_UNSUPPORT_BILTIN
+# define dofork 1
+#else
+ int dofork;
+ extern char **environ;
+#endif
+
+ gid = getgid();
+ setgroups(1, &gid);
+
+#ifndef INETD_UNSUPPORT_BILTIN
+ Argv = argv;
+ if (environ == 0 || *environ == 0)
+ environ = argv;
+ while (*environ)
+ environ++;
+ LastArg = environ[-1] + strlen(environ[-1]);
+#endif
+
+ while ((ch = getopt(argc, argv, "q:")) != EOF)
+ switch(ch) {
+ case 'q':
+ global_queuelen = atoi(optarg);
+ if (global_queuelen < 8) global_queuelen=8;
+ break;
+ default:
+ show_usage(); // "[-q len] [conf]"
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (argc > 0)
+ CONFIG = argv[0];
+
+ daemon(0, 0);
+ openlog(applet_name, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
+ {
+ FILE *fp;
+
+ if ((fp = fopen(_PATH_INETDPID, "w")) != NULL) {
+ fprintf(fp, "%u\n", getpid());
+ (void)fclose(fp);
+ }
+ }
+
+#ifdef RLIMIT_NOFILE
+ if (getrlimit(RLIMIT_NOFILE, &rlim_ofile) < 0) {
+ syslog(LOG_ERR, "getrlimit: %m");
+ } else {
+ rlim_ofile_cur = rlim_ofile.rlim_cur;
+ if (rlim_ofile_cur == RLIM_INFINITY) /* ! */
+ rlim_ofile_cur = OPEN_MAX;
+ }
+#endif
+
+ config(0);
+
+ sigemptyset(&emptymask);
+ sigemptyset(&blockmask);
+ sigaddset(&blockmask, SIGCHLD);
+ sigaddset(&blockmask, SIGHUP);
+ sigaddset(&blockmask, SIGALRM);
+
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_mask = blockmask;
+ sa.sa_handler = retry;
+ sigaction(SIGALRM, &sa, NULL);
+ sa.sa_handler = config;
+ sigaction(SIGHUP, &sa, NULL);
+ sa.sa_handler = reapchild;
+ sigaction(SIGCHLD, &sa, NULL);
+ sa.sa_handler = goaway;
+ sigaction(SIGTERM, &sa, NULL);
+ sa.sa_handler = goaway;
+ sigaction(SIGINT, &sa, NULL);
+ sa.sa_handler = SIG_IGN;
+ sigaction(SIGPIPE, &sa, NULL);
+
+ {
+ /* space for daemons to overwrite environment for ps */
+#define DUMMYSIZE 100
+ char dummy[DUMMYSIZE];
+
+ (void)memset(dummy, 'x', DUMMYSIZE - 1);
+ dummy[DUMMYSIZE - 1] = '\0';
+
+ (void)setenv("inetd_dummy", dummy, 1);
+ }
+
+ for (;;) {
+ int n, ctrl;
+ fd_set readable;
+
+ if (nsock == 0) {
+ sigprocmask(SIG_BLOCK, &blockmask, NULL);
+ while (nsock == 0)
+ sigsuspend(&emptymask);
+ sigprocmask(SIG_SETMASK, &emptymask, NULL);
+ }
+ readable = allsock;
+ if ((n = select(maxsock + 1, &readable, (fd_set *)0,
+ (fd_set *)0, (struct timeval *)0)) <= 0) {
+ if (n < 0 && errno != EINTR)
+ syslog(LOG_WARNING, "select: %m");
+ sleep(1);
+ continue;
+ }
+ for (sep = servtab; n && sep; sep = sep->se_next)
+ if (sep->se_fd != -1 && FD_ISSET(sep->se_fd, &readable)) {
+ n--;
+ if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) {
+ /* Fixed AGC */
+ fcntl(sep->se_fd, F_SETFL, O_NDELAY);
+ /* --------- */
+ ctrl = accept(sep->se_fd, NULL, NULL);
+ fcntl(sep->se_fd, F_SETFL, 0);
+ if (ctrl < 0) {
+ if (errno == EINTR || errno == EWOULDBLOCK)
+ continue;
+ syslog(LOG_WARNING, "accept (for %s): %m",
+ sep->se_service);
+ continue;
+ }
+ } else
+ ctrl = sep->se_fd;
+ sigprocmask(SIG_BLOCK, &blockmask, NULL);
+ pid = 0;
+#ifndef INETD_UNSUPPORT_BILTIN
+ dofork = (sep->se_bi == 0 || sep->se_bi->bi_fork);
+#endif
+ if (dofork) {
+ if (sep->se_count++ == 0)
+ (void)gettimeofday(&sep->se_time,
+ (struct timezone *)0);
+ else if (sep->se_count >= sep->se_max) {
+ struct timeval now;
+
+ (void)gettimeofday(&now, (struct timezone *)0);
+ if (now.tv_sec - sep->se_time.tv_sec >
+ CNT_INTVL) {
+ sep->se_time = now;
+ sep->se_count = 1;
+ } else {
+ syslog(LOG_ERR,
+ "%s/%s server failing (looping), service terminated",
+ sep->se_service, sep->se_proto);
+ FD_CLR(sep->se_fd, &allsock);
+ (void) close(sep->se_fd);
+ sep->se_fd = -1;
+ sep->se_count = 0;
+ nsock--;
+ sigprocmask(SIG_SETMASK, &emptymask,
+ NULL);
+ if (!timingout) {
+ timingout = 1;
+ alarm(RETRYTIME);
+ }
+ continue;
+ }
+ }
+ pid = fork();
+ }
+ if (pid < 0) {
+ syslog(LOG_ERR, "fork: %m");
+ if (sep->se_socktype == SOCK_STREAM)
+ close(ctrl);
+ sigprocmask(SIG_SETMASK, &emptymask, NULL);
+ sleep(1);
+ continue;
+ }
+ if (pid && sep->se_wait) {
+ sep->se_wait = pid;
+ FD_CLR(sep->se_fd, &allsock);
+ nsock--;
+ }
+ sigprocmask(SIG_SETMASK, &emptymask, NULL);
+ if (pid == 0) {
+#ifndef INETD_UNSUPPORT_BILTIN
+ if (sep->se_bi)
+ (*sep->se_bi->bi_fn)(ctrl, sep);
+ else
+#endif
+ {
+ if ((pwd = getpwnam(sep->se_user)) == NULL) {
+ syslog_err_and_discard_dg(
+ sep->se_socktype,
+ "getpwnam: %s: No such user",
+ sep->se_user);
+ }
+ if (sep->se_group &&
+ (grp = getgrnam(sep->se_group)) == NULL) {
+ syslog_err_and_discard_dg(
+ sep->se_socktype,
+ "getgrnam: %s: No such group",
+ sep->se_group);
+ }
+ /*
+ * Ok. There are four cases here:
+ * 1. nonroot user, no group specified
+ * 2. nonroot user, some group specified
+ * 3. root user, no group specified
+ * 4. root user, some group specified
+ * In cases 2 and 4 we setgid to the specified
+ * group. In cases 1 and 2 we run initgroups
+ * to run with the groups of the given user.
+ * In case 4 we do setgroups to run with the
+ * given group. In case 3 we do nothing.
+ */
+ if (pwd->pw_uid) {
+ if (sep->se_group)
+ pwd->pw_gid = grp->gr_gid;
+ setgid((gid_t)pwd->pw_gid);
+ initgroups(pwd->pw_name, pwd->pw_gid);
+ setuid((uid_t)pwd->pw_uid);
+ } else if (sep->se_group) {
+ setgid((gid_t)grp->gr_gid);
+ setgroups(1, &grp->gr_gid);
+ }
+ dup2(ctrl, 0);
+ close(ctrl);
+ dup2(0, 1);
+ dup2(0, 2);
+#ifdef RLIMIT_NOFILE
+ if (rlim_ofile.rlim_cur != rlim_ofile_cur) {
+ if (setrlimit(RLIMIT_NOFILE,
+ &rlim_ofile) < 0)
+ syslog(LOG_ERR,"setrlimit: %m");
+ }
+#endif
+ for (ctrl = rlim_ofile_cur-1; --ctrl > 2; )
+ (void)close(ctrl);
+
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_handler = SIG_DFL;
+ sigaction(SIGPIPE, &sa, NULL);
+
+ execv(sep->se_server, sep->se_argv);
+ syslog_err_and_discard_dg(sep->se_socktype,
+ "execv %s: %m", sep->se_server);
+ }
+ }
+ if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
+ close(ctrl);
+ }
+ }
+}
+
+
+/*
+ * Internet services provided internally by inetd:
+ */
+#define BUFSIZE 4096
+
+#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO
+/* Echo service -- echo data back */
+static void
+echo_stream(int s, struct servtab *sep)
+{
+ char buffer[BUFSIZE];
+ int i;
+
+ setproctitle(sep->se_service, s);
+ while ((i = read(s, buffer, sizeof(buffer))) > 0 &&
+ write(s, buffer, i) > 0)
+ ;
+ exit(0);
+}
+
+/* Echo service -- echo data back */
+static void
+echo_dg(int s, struct servtab *sep)
+{
+ char buffer[BUFSIZE];
+ int i;
+ size_t size;
+ struct sockaddr sa;
+
+ (void)sep;
+
+ size = sizeof(sa);
+ if ((i = recvfrom(s, buffer, sizeof(buffer), 0, &sa, &size)) < 0)
+ return;
+ (void) sendto(s, buffer, i, 0, &sa, sizeof(sa));
+}
+#endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO */
+
+
+#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD
+/* Discard service -- ignore data */
+static void
+discard_stream(int s, struct servtab *sep)
+{
+ char buffer[BUFSIZE];
+
+ setproctitle(sep->se_service, s);
+ while ((errno = 0, read(s, buffer, sizeof(buffer)) > 0) ||
+ errno == EINTR)
+ ;
+ exit(0);
+}
+
+/* Discard service -- ignore data */
+static void
+discard_dg(int s, struct servtab *sep)
+{
+ char buffer[BUFSIZE];
+ (void)sep;
+ read(s, buffer, sizeof(buffer));
+}
+#endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD */
+
+
+#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN
+#include <ctype.h>
+#define LINESIZ 72
+static char ring[128];
+static char *endring;
+
+static void
+initring(void)
+{
+ int i;
+
+ endring = ring;
+
+ for (i = 0; i <= 128; ++i)
+ if (isprint(i))
+ *endring++ = i;
+}
+
+/* Character generator */
+static void
+chargen_stream(int s, struct servtab *sep)
+{
+ char *rs;
+ int len;
+ char text[LINESIZ+2];
+
+ setproctitle(sep->se_service, s);
+
+ if (!endring) {
+ initring();
+ rs = ring;
+ }
+
+ text[LINESIZ] = '\r';
+ text[LINESIZ + 1] = '\n';
+ for (rs = ring;;) {
+ if ((len = endring - rs) >= LINESIZ)
+ BCOPY(rs, text, LINESIZ);
+ else {
+ BCOPY(rs, text, len);
+ BCOPY(ring, text + len, LINESIZ - len);
+ }
+ if (++rs == endring)
+ rs = ring;
+ if (write(s, text, sizeof(text)) != sizeof(text))
+ break;
+ }
+ exit(0);
+}
+
+/* Character generator */
+static void
+chargen_dg(int s, struct servtab *sep)
+{
+ struct sockaddr sa;
+ static char *rs;
+ size_t len, size;
+ char text[LINESIZ+2];
+
+ (void)sep;
+
+ if (endring == 0) {
+ initring();
+ rs = ring;
+ }
+
+ size = sizeof(sa);
+ if (recvfrom(s, text, sizeof(text), 0, &sa, &size) < 0)
+ return;
+
+ if ((len = endring - rs) >= LINESIZ)
+ BCOPY(rs, text, LINESIZ);
+ else {
+ BCOPY(rs, text, len);
+ BCOPY(ring, text + len, LINESIZ - len);
+ }
+ if (++rs == endring)
+ rs = ring;
+ text[LINESIZ] = '\r';
+ text[LINESIZ + 1] = '\n';
+ (void) sendto(s, text, sizeof(text), 0, &sa, sizeof(sa));
+}
+#endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_CHARGEN */
+
+
+#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME
+/*
+ * Return a machine readable date and time, in the form of the
+ * number of seconds since midnight, Jan 1, 1900. Since gettimeofday
+ * returns the number of seconds since midnight, Jan 1, 1970,
+ * we must add 2208988800 seconds to this figure to make up for
+ * some seventy years Bell Labs was asleep.
+ */
+
+static long
+machtime(void)
+{
+ struct timeval tv;
+
+ if (gettimeofday(&tv, (struct timezone *)0) < 0) {
+ fprintf(stderr, "Unable to get time of day\n");
+ return (0L);
+ }
+ return (htonl((long)tv.tv_sec + 2208988800UL));
+}
+
+static void
+machtime_stream(int s, struct servtab *sep)
+{
+ long result;
+ (void)sep;
+
+ result = machtime();
+ write(s, (char *) &result, sizeof(result));
+}
+
+static void
+machtime_dg(int s, struct servtab *sep)
+{
+ long result;
+ struct sockaddr sa;
+ size_t size;
+ (void)sep;
+
+ size = sizeof(sa);
+ if (recvfrom(s, (char *)&result, sizeof(result), 0, &sa, &size) < 0)
+ return;
+ result = machtime();
+ (void) sendto(s, (char *) &result, sizeof(result), 0, &sa, sizeof(sa));
+}
+#endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_TIME */
+
+
+#ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME
+/* Return human-readable time of day */
+static int
+human_readable_time_sprintf(char *buffer)
+{
+ time_t clocc = time(NULL);
+
+ return sprintf(buffer, "%.24s\r\n", ctime(&clocc));
+}
+
+static void
+daytime_stream(int s, struct servtab *sep)
+{
+ char buffer[256];
+ size_t st = human_readable_time_sprintf(buffer);
+
+ (void)sep;
+
+ write(s, buffer, st);
+}
+
+/* Return human-readable time of day */
+static void
+daytime_dg(int s, struct servtab *sep)
+{
+ char buffer[256];
+ struct sockaddr sa;
+ size_t size;
+
+ (void)sep;
+
+ size = sizeof(sa);
+ if (recvfrom(s, buffer, sizeof(buffer), 0, &sa, &size) < 0)
+ return;
+ size = human_readable_time_sprintf(buffer);
+ sendto(s, buffer, size, 0, &sa, sizeof(sa));
+}
+#endif /* CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 08:54:57 +0000