diff options
| -rw-r--r-- | networking/Makefile | 1 | ||||
| -rw-r--r-- | networking/config.in | 1 | ||||
| -rw-r--r-- | networking/netstat.c | 547 |
3 files changed, 549 insertions, 0 deletions
diff --git a/networking/Makefile b/networking/Makefile index 4dd0cdb56..4b522ffff 100644 --- a/networking/Makefile +++ b/networking/Makefile @@ -28,6 +28,7 @@ obj- := obj-$(CONFIG_HOSTNAME) += hostname.o obj-$(CONFIG_IFCONFIG) += ifconfig.o obj-$(CONFIG_NC) += nc.o +obj-$(CONFIG_NETSTAT) += netstat.o obj-$(CONFIG_NSLOOKUP) += nslookup.o obj-$(CONFIG_PING) += ping.o obj-$(CONFIG_ROUTE) += route.o diff --git a/networking/config.in b/networking/config.in index 0636a7099..b148eb57c 100644 --- a/networking/config.in +++ b/networking/config.in @@ -16,6 +16,7 @@ if [ "$CONFIG_IFCONFIG" = "y" ]; then bool ' Set the broadcast automatically' CONFIG_FEATURE_IFCONFIG_BROADCAST_PLUS fi bool 'nc' CONFIG_NC +bool 'netstat' CONFIG_NETSTAT bool 'nslookup' CONFIG_NSLOOKUP bool 'ping' CONFIG_PING if [ "$CONFIG_PING" = "y" ]; then diff --git a/networking/netstat.c b/networking/netstat.c new file mode 100644 index 000000000..e33a89a64 --- /dev/null +++ b/networking/netstat.c @@ -0,0 +1,547 @@ +/* vi: set sw=4 ts=4: */ +/* + * Mini netstat implementation(s) for busybox + * based in part on the netstat implementation from net-tools. + * + * Copyright (C) 2001 by Bart Visscher <magick@linux-fan.com> + * + * 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 + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <stdarg.h> +#include <signal.h> +#include <errno.h> +#include <sys/stat.h> +#include <dirent.h> +#include <unistd.h> +#include <pwd.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> + +#include "busybox.h" + +#define NETSTAT_CONNECTED 0x01 +#define NETSTAT_LISTENING 0x02 +#define NETSTAT_NUMERIC 0x04 +#define NETSTAT_TCP 0x10 +#define NETSTAT_UDP 0x20 +#define NETSTAT_RAW 0x40 +#define NETSTAT_UNIX 0x80 + +int flags = NETSTAT_CONNECTED | + NETSTAT_TCP | NETSTAT_UDP | NETSTAT_RAW | NETSTAT_UNIX; + +#define PROGNAME_WIDTHs PROGNAME_WIDTH1(PROGNAME_WIDTH) +#define PROGNAME_WIDTH1(s) PROGNAME_WIDTH2(s) +#define PROGNAME_WIDTH2(s) #s + +#define PRG_HASH_SIZE 211 + +enum { + TCP_ESTABLISHED = 1, + TCP_SYN_SENT, + TCP_SYN_RECV, + TCP_FIN_WAIT1, + TCP_FIN_WAIT2, + TCP_TIME_WAIT, + TCP_CLOSE, + TCP_CLOSE_WAIT, + TCP_LAST_ACK, + TCP_LISTEN, + TCP_CLOSING /* now a valid state */ +}; + +static const char *tcp_state[] = +{ + "", + "ESTABLISHED", + "SYN_SENT", + "SYN_RECV", + "FIN_WAIT1", + "FIN_WAIT2", + "TIME_WAIT", + "CLOSE", + "CLOSE_WAIT", + "LAST_ACK", + "LISTEN", + "CLOSING" +}; + +typedef enum { + SS_FREE = 0, /* not allocated */ + SS_UNCONNECTED, /* unconnected to any socket */ + SS_CONNECTING, /* in process of connecting */ + SS_CONNECTED, /* connected to socket */ + SS_DISCONNECTING /* in process of disconnecting */ +} socket_state; + +#define SO_ACCEPTCON (1<<16) /* performed a listen */ +#define SO_WAITDATA (1<<17) /* wait data to read */ +#define SO_NOSPACE (1<<18) /* no space to write */ + +char *itoa(unsigned int i) +{ + /* 21 digits plus null terminator, good for 64-bit or smaller ints */ + static char local[22]; + char *p = &local[21]; + *p-- = '\0'; + do { + *p-- = '0' + i % 10; + i /= 10; + } while (i > 0); + return p + 1; +} + +char *inet_sprint(struct sockaddr* addr, int num) +{ + char *str; + str=inet_ntoa(((struct sockaddr_in*)addr)->sin_addr); + if (!strcmp(str,"0.0.0.0")) { + str="*"; + } + if (num) + { + } else { + struct hostent *he=gethostbyaddr(&((struct sockaddr_in*)addr)->sin_addr,4,AF_INET); + if (he) + str=he->h_name; + } + return str; +} + +char *get_sname(int port, const char *proto, int num) +{ + char *str=itoa(ntohs(port)); + if (num) { + } else { + struct servent *se=getservbyport(port,proto); + if (se) + str=se->s_name; + } + if (!port) { + str="*"; + } + return str; +} + +void snprint_ip_port(char *ip_port, int size, struct sockaddr *addr, int port, char *proto, int numeric) +{ + char *port_name; + safe_strncpy(ip_port, inet_sprint(addr, numeric), size); + port_name=get_sname(htons(port), proto, numeric); + if ((strlen(ip_port) + strlen(port_name)) > 22) + ip_port[22 - strlen(port_name)] = '\0'; + ip_port+=strlen(ip_port); + strcat(ip_port, ":"); + strcat(ip_port, port_name); +} + +static void tcp_do_one(int lnr, const char *line) +{ + char local_addr[64], rem_addr[64]; + char *state_str, more[512]; + int num, local_port, rem_port, d, state, timer_run, uid, timeout; + struct sockaddr_in localaddr, remaddr; + unsigned long rxq, txq, time_len, retr, inode; + + if (lnr == 0) + return; + + more[0] = '\0'; + num = sscanf(line, + "%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n", + &d, local_addr, &local_port, + rem_addr, &rem_port, &state, + &txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more); + + if (strlen(local_addr) > 8) { + } else { + sscanf(local_addr, "%X", + &((struct sockaddr_in *) &localaddr)->sin_addr.s_addr); + sscanf(rem_addr, "%X", + &((struct sockaddr_in *) &remaddr)->sin_addr.s_addr); + ((struct sockaddr *) &localaddr)->sa_family = AF_INET; + ((struct sockaddr *) &remaddr)->sa_family = AF_INET; + } + + if (num < 10) { + error_msg("warning, got bogus tcp line.\n"); + return; + } + state_str=(char*)tcp_state[state]; + if ((rem_port && (flags&NETSTAT_CONNECTED)) || + (!rem_port && (flags&NETSTAT_LISTENING))) + { + snprint_ip_port(local_addr, sizeof(local_addr), + (struct sockaddr *) &localaddr, local_port, + "tcp", flags&NETSTAT_NUMERIC); + + snprint_ip_port(rem_addr, sizeof(rem_addr), + (struct sockaddr *) &remaddr, rem_port, + "tcp", flags&NETSTAT_NUMERIC); + + printf("tcp %6ld %6ld %-23s %-23s %-12s\n", + rxq, txq, local_addr, rem_addr, state_str); + + } +} + +static void udp_do_one(int lnr, const char *line) +{ + char local_addr[64], rem_addr[64]; + char *state_str, more[512]; + int num, local_port, rem_port, d, state, timer_run, uid, timeout; + struct sockaddr_in localaddr, remaddr; + unsigned long rxq, txq, time_len, retr, inode; + + if (lnr == 0) + return; + + more[0] = '\0'; + num = sscanf(line, + "%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n", + &d, local_addr, &local_port, + rem_addr, &rem_port, &state, + &txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more); + + if (strlen(local_addr) > 8) { + } else { + sscanf(local_addr, "%X", + &((struct sockaddr_in *) &localaddr)->sin_addr.s_addr); + sscanf(rem_addr, "%X", + &((struct sockaddr_in *) &remaddr)->sin_addr.s_addr); + ((struct sockaddr *) &localaddr)->sa_family = AF_INET; + ((struct sockaddr *) &remaddr)->sa_family = AF_INET; + } + + if (num < 10) { + error_msg("warning, got bogus udp line.\n"); + return; + } + switch (state) { + case TCP_ESTABLISHED: + state_str = "ESTABLISHED"; + break; + + case TCP_CLOSE: + state_str = ""; + break; + + default: + state_str = "UNKNOWN"; + break; + } + +#define notnull(A) (A.sin_addr.s_addr) + if ((notnull(remaddr) && (flags&NETSTAT_CONNECTED)) || + (!notnull(remaddr) && (flags&NETSTAT_LISTENING))) + { + snprint_ip_port(local_addr, sizeof(local_addr), + (struct sockaddr *) &localaddr, local_port, + "udp", flags&NETSTAT_NUMERIC); + + snprint_ip_port(rem_addr, sizeof(rem_addr), + (struct sockaddr *) &remaddr, rem_port, + "udp", flags&NETSTAT_NUMERIC); + + printf("udp %6ld %6ld %-23s %-23s %-12s\n", + rxq, txq, local_addr, rem_addr, state_str); + + } +} + +static void raw_do_one(int lnr, const char *line) +{ + char local_addr[64], rem_addr[64]; + char *state_str, more[512]; + int num, local_port, rem_port, d, state, timer_run, uid, timeout; + struct sockaddr_in localaddr, remaddr; + unsigned long rxq, txq, time_len, retr, inode; + + if (lnr == 0) + return; + + more[0] = '\0'; + num = sscanf(line, + "%d: %64[0-9A-Fa-f]:%X %64[0-9A-Fa-f]:%X %X %lX:%lX %X:%lX %lX %d %d %ld %512s\n", + &d, local_addr, &local_port, + rem_addr, &rem_port, &state, + &txq, &rxq, &timer_run, &time_len, &retr, &uid, &timeout, &inode, more); + + if (strlen(local_addr) > 8) { + } else { + sscanf(local_addr, "%X", + &((struct sockaddr_in *) &localaddr)->sin_addr.s_addr); + sscanf(rem_addr, "%X", + &((struct sockaddr_in *) &remaddr)->sin_addr.s_addr); + ((struct sockaddr *) &localaddr)->sa_family = AF_INET; + ((struct sockaddr *) &remaddr)->sa_family = AF_INET; + } + + if (num < 10) { + error_msg("warning, got bogus raw line.\n"); + return; + } + state_str=itoa(state); + +#define notnull(A) (A.sin_addr.s_addr) + if ((notnull(remaddr) && (flags&NETSTAT_CONNECTED)) || + (!notnull(remaddr) && (flags&NETSTAT_LISTENING))) + { + snprint_ip_port(local_addr, sizeof(local_addr), + (struct sockaddr *) &localaddr, local_port, + "raw", flags&NETSTAT_NUMERIC); + + snprint_ip_port(rem_addr, sizeof(rem_addr), + (struct sockaddr *) &remaddr, rem_port, + "raw", flags&NETSTAT_NUMERIC); + + printf("raw %6ld %6ld %-23s %-23s %-12s\n", + rxq, txq, local_addr, rem_addr, state_str); + + } +} + +#define HAS_INODE 1 + +static void unix_do_one(int nr, const char *line) +{ + static int has = 0; + char path[PATH_MAX], ss_flags[32]; + char *ss_proto, *ss_state, *ss_type; + int num, state, type, inode; + void *d; + unsigned long refcnt, proto, unix_flags; + + if (nr == 0) { + if (strstr(line, "Inode")) + has |= HAS_INODE; + return; + } + path[0] = '\0'; + num = sscanf(line, "%p: %lX %lX %lX %X %X %d %s", + &d, &refcnt, &proto, &unix_flags, &type, &state, &inode, path); + if (num < 6) { + error_msg("warning, got bogus unix line.\n"); + return; + } + if (!(has & HAS_INODE)) + snprintf(path,sizeof(path),"%d",inode); + + if ((flags&(NETSTAT_LISTENING|NETSTAT_CONNECTED))!=(NETSTAT_LISTENING|NETSTAT_CONNECTED)) { + if ((state == SS_UNCONNECTED) && (unix_flags & SO_ACCEPTCON)) { + if (!(flags&NETSTAT_LISTENING)) + return; + } else { + if (!(flags&NETSTAT_CONNECTED)) + return; + } + } + + switch (proto) { + case 0: + ss_proto = "unix"; + break; + + default: + ss_proto = "??"; + } + + switch (type) { + case SOCK_STREAM: + ss_type = "STREAM"; + break; + + case SOCK_DGRAM: + ss_type = "DGRAM"; + break; + + case SOCK_RAW: + ss_type = "RAW"; + break; + + case SOCK_RDM: + ss_type = "RDM"; + break; + + case SOCK_SEQPACKET: + ss_type = "SEQPACKET"; + break; + + default: + ss_type = "UNKNOWN"; + } + + switch (state) { + case SS_FREE: + ss_state = "FREE"; + break; + + case SS_UNCONNECTED: + /* + * Unconnected sockets may be listening + * for something. + */ + if (unix_flags & SO_ACCEPTCON) { + ss_state = "LISTENING"; + } else { + ss_state = ""; + } + break; + + case SS_CONNECTING: + ss_state = "CONNECTING"; + break; + + case SS_CONNECTED: + ss_state = "CONNECTED"; + break; + + case SS_DISCONNECTING: + ss_state = "DISCONNECTING"; + break; + + default: + ss_state = "UNKNOWN"; + } + + strcpy(ss_flags, "[ "); + if (unix_flags & SO_ACCEPTCON) + strcat(ss_flags, "ACC "); + if (unix_flags & SO_WAITDATA) + strcat(ss_flags, "W "); + if (unix_flags & SO_NOSPACE) + strcat(ss_flags, "N "); + + strcat(ss_flags, "]"); + + printf("%-5s %-6ld %-11s %-10s %-13s ", + ss_proto, refcnt, ss_flags, ss_type, ss_state); + if (has & HAS_INODE) + printf("%-6d ",inode); + else + printf("- "); + puts(path); +} + +#define _PATH_PROCNET_UDP "/proc/net/udp" +#define _PATH_PROCNET_TCP "/proc/net/tcp" +#define _PATH_PROCNET_RAW "/proc/net/raw" +#define _PATH_PROCNET_UNIX "/proc/net/unix" + +static int do_info(char *file, char *name, void (*proc)(int, const char *)) +{ + char buffer[8192]; + int rc = 0; + int lnr = 0; + FILE *procinfo; + + procinfo = fopen((file), "r"); + if (procinfo == NULL) { + if (errno != ENOENT) { + perror((file)); + return -1; + } + error_msg("%s: no support for `%s' on this system.\n", + "netstat", (name)); + rc = 1; + } else { + do { + if (fgets(buffer, sizeof(buffer), procinfo)) + (proc)(lnr++, buffer); + } while (!feof(procinfo)); + fclose(procinfo); + } + return rc; +} + +/* + * Our main function. + */ + +int netstat_main(int argc, char **argv) +{ + int opt; + int new_flags=0; + while ((opt = getopt(argc, argv, "lantuwx")) != -1) + switch (opt) { + case 'l': + flags &= ~NETSTAT_CONNECTED; + flags |= NETSTAT_LISTENING; + break; + case 'a': + flags |= NETSTAT_LISTENING | NETSTAT_CONNECTED; + break; + case 'n': + flags |= NETSTAT_NUMERIC; + break; + case 't': + new_flags |= NETSTAT_TCP; + break; + case 'u': + new_flags |= NETSTAT_UDP; + break; + case 'w': + new_flags |= NETSTAT_RAW; + break; + case 'x': + new_flags |= NETSTAT_UNIX; + break; + default: + show_usage(); + } + if (new_flags) { + flags &= ~(NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW|NETSTAT_UNIX); + flags |= new_flags; + } + if (flags&(NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW)) { + printf("Active Internet connections "); /* xxx */ + + if ((flags&(NETSTAT_LISTENING|NETSTAT_CONNECTED))==(NETSTAT_LISTENING|NETSTAT_CONNECTED)) + printf("(servers and established)"); + else { + if (flags&NETSTAT_LISTENING) + printf("(only servers)"); + else + printf("(w/o servers)"); + } + printf("\nProto Recv-Q Send-Q Local Address Foreign Address State \n"); + } + if (flags&NETSTAT_TCP) + do_info(_PATH_PROCNET_TCP,"AF INET (tcp)",tcp_do_one); + if (flags&NETSTAT_UDP) + do_info(_PATH_PROCNET_UDP,"AF INET (udp)",udp_do_one); + if (flags&NETSTAT_RAW) + do_info(_PATH_PROCNET_RAW,"AF INET (raw)",raw_do_one); + if (flags&NETSTAT_UNIX) { + printf("Active UNIX domain sockets "); + if ((flags&(NETSTAT_LISTENING|NETSTAT_CONNECTED))==(NETSTAT_LISTENING|NETSTAT_CONNECTED)) + printf("(servers and established)"); + else { + if (flags&NETSTAT_LISTENING) + printf("(only servers)"); + else + printf("(w/o servers)"); + } + + printf("\nProto RefCnt Flags Type State I-Node Path\n"); + do_info(_PATH_PROCNET_UNIX,"AF UNIX",unix_do_one); + } + return 0; +} |