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-rw-r--r--toys/pending/arp.c306
1 files changed, 306 insertions, 0 deletions
diff --git a/toys/pending/arp.c b/toys/pending/arp.c
new file mode 100644
index 00000000..831facb9
--- /dev/null
+++ b/toys/pending/arp.c
@@ -0,0 +1,306 @@
+/* arp.c - manipulate the system ARP cache
+ *
+ * Copyright 2014 Sandeep Sharma <sandeep.jack2756@gmail.com>
+ * Copyright 2014 Kyungwan Han <asura321@gamil.com>
+ * No Standard
+
+USE_ARP(NEWTOY(arp, "vi:nDsdap:A:H:[+Ap][!sd]", TOYFLAG_USR|TOYFLAG_BIN))
+
+config ARP
+ bool "arp"
+ default n
+ help
+ Usage: arp
+ [-vn] [-H HWTYPE] [-i IF] -a [HOSTNAME]
+ [-v] [-i IF] -d HOSTNAME [pub]
+ [-v] [-H HWTYPE] [-i IF] -s HOSTNAME HWADDR [temp]
+ [-v] [-H HWTYPE] [-i IF] -s HOSTNAME HWADDR [netmask MASK] pub
+ [-v] [-H HWTYPE] [-i IF] -Ds HOSTNAME IFACE [netmask MASK] pub
+
+ Manipulate ARP cache
+
+ -a Display (all) hosts
+ -s Set new ARP entry
+ -d Delete a specified entry
+ -v Verbose
+ -n Don't resolve names
+ -i IF Network interface
+ -D Read <hwaddr> from given device
+ -A,-p AF Protocol family
+ -H HWTYPE Hardware address type
+
+*/
+
+#define FOR_arp
+#include "toys.h"
+#include <net/if_arp.h>
+
+GLOBALS(
+ char *hw_type;
+ char *af_type_A;
+ char *af_type_p;
+ char *interface;
+
+ int sockfd;
+ char *device;
+)
+
+struct arpreq req; //Global request structure
+
+struct type {
+ char *name;
+ int val;
+};
+
+struct type hwtype[] = {
+ {"ether", ARPHRD_ETHER },
+ {"loop" ,ARPHRD_LOOPBACK},
+ {"ppp" ,ARPHRD_PPP},
+ {"infiniband" ,ARPHRD_INFINIBAND},
+ {NULL, -1},
+};
+
+struct type aftype[] = {
+ {"inet", AF_INET },
+ {"inet6" ,AF_INET6},
+ {"unspec" ,AF_UNSPEC},
+ {NULL, -1},
+};
+
+struct type flag_type[] = {
+ {"PERM", ATF_PERM },
+ {"PUB" ,ATF_PUBL},
+ {"DONTPUB" ,ATF_DONTPUB},
+ {"TRAIL" ,ATF_USETRAILERS},
+ {NULL, -1},
+};
+
+static int get_index(struct type arr[], char *name)
+{
+ int i;
+
+ for (i = 0; arr[i].name; i++)
+ if (!strcmp(arr[i].name, name)) break;
+ return arr[i].val;
+}
+
+
+void get_hw_add(char *hw_addr, char *ptr)
+{
+ char *p = ptr, *hw = hw_addr;
+
+ while (*hw_addr && (p-ptr) < 6) {
+ int val, len = 0;
+
+ if (*hw_addr == ':') hw_addr++;
+ sscanf(hw_addr, "%2x%n", &val, &len);
+ if (!len || len > 2) break;
+ hw_addr += len;
+ *p++ = val;
+ }
+
+ if ((p-ptr) != 6 || *hw_addr)
+ error_exit("bad hw addr '%s'", hw);
+}
+
+static void resolve_host(char *host, struct sockaddr *sa)
+{
+ struct addrinfo hints, *res = NULL;
+ int ret;
+
+ memset(&hints, 0, sizeof hints);
+ hints.ai_family = AF_INET;
+ hints.ai_socktype = SOCK_STREAM;
+ if ((ret = getaddrinfo(host, NULL, &hints, &res)))
+ perror_exit("%s", gai_strerror(ret));
+
+ memcpy(sa, res->ai_addr, res->ai_addrlen);
+ freeaddrinfo(res);
+}
+
+static void check_flags(int *i, char** argv)
+{
+ struct sockaddr sa;
+ int flag = *i, j;
+ struct flags {
+ char *name;
+ int or, flag;
+ } f[] = {
+ {"pub", 1 ,ATF_PUBL},
+ {"priv", 0 ,~ATF_PUBL},
+ {"trail", 1, ATF_USETRAILERS},
+ {"temp", 0, ~ATF_PERM},
+ {"dontpub",1, ATF_DONTPUB},
+ };
+
+ for (;*argv; argv++) {
+ for (j = 0; j < ARRAY_LEN(f); j++) {
+ if (!strcmp(*argv, f[j].name)) {
+ (f[j].or) ?(flag |= f[j].flag):(flag &= f[j].flag);
+ break;
+ }
+ }
+ if (j > 4 && !strcmp(*argv, "netmask")) {
+ if (!*++argv) error_exit("NULL netmask");
+ if (strcmp(*argv, "255.255.255.255")) {
+ resolve_host(toys.optargs[0], &sa);
+ memcpy(&req.arp_netmask, &sa, sizeof(sa));
+ flag |= ATF_NETMASK;
+ } else argv++;
+ } else if (j > 4 && !strcmp(*argv, "dev")) {
+ if (!*++argv) error_exit("NULL dev");
+ TT.device = *argv;
+ } else if (j > 4) error_exit("invalid arg");
+ }
+ *i = flag;
+}
+
+static int set_entry(void)
+{
+ int flags = 0;
+
+ if (!toys.optargs[1]) error_exit("bad syntax");
+
+ if (!(toys.optflags & FLAG_D)) get_hw_add(toys.optargs[1], (char*)&req.arp_ha.sa_data);
+ else {
+ struct ifreq ifre;
+
+ xstrncpy(ifre.ifr_name, toys.optargs[1], IFNAMSIZ);
+ xioctl(TT.sockfd, SIOCGIFHWADDR, &ifre);
+ if ((toys.optflags & FLAG_H) && (ifre.ifr_hwaddr.sa_family != ARPHRD_ETHER))
+ error_exit("protocol type mismatch");
+ memcpy(&req.arp_ha, &(ifre.ifr_hwaddr), sizeof(req.arp_ha));
+ }
+
+ flags = ATF_PERM | ATF_COM;
+ if (toys.optargs[2]) check_flags(&flags, (toys.optargs+2));
+ req.arp_flags = flags;
+ strncpy(req.arp_dev, TT.device, sizeof(TT.device));
+ xioctl(TT.sockfd, SIOCSARP, &req);
+
+ if (toys.optflags & FLAG_v) xprintf("Entry set for %s\n", toys.optargs[0]);
+ return 0;
+}
+
+static int ip_to_host(struct sockaddr *sa, int flag)
+{
+ int status = 0;
+ char hbuf[NI_MAXHOST] = {0,}, sbuf[NI_MAXSERV] = {0,};
+ socklen_t len = sizeof(struct sockaddr_in6);
+
+ *toybuf = 0;
+ if (!(status = getnameinfo(sa, len, hbuf, sizeof(hbuf), sbuf,
+ sizeof(sbuf), flag))) {
+ strcpy(toybuf, hbuf);
+ return 0;
+ }
+ return 1;
+}
+
+static int delete_entry(void)
+{
+ int flags;
+
+ flags = ATF_PERM;
+ if (toys.optargs[1]) check_flags(&flags, (toys.optargs+1));
+ req.arp_flags = flags;
+ strncpy(req.arp_dev, TT.device, sizeof(TT.device));
+ xioctl(TT.sockfd, SIOCDARP, &req);
+
+ if (toys.optflags & FLAG_v) xprintf("Delete entry for %s\n", toys.optargs[0]);
+ return 0;
+}
+
+void arp_main(void)
+{
+ struct sockaddr sa;
+ char ip[128], hw_addr[128], mask[12], dev[128], *host_ip = NULL, *buf;
+ int h_type, type, flag, i, fd, entries = 0, disp = 0;
+
+ TT.device = "";
+ memset(&sa, 0, sizeof(sa));
+ memset(&req, 0, sizeof(req));
+ TT.sockfd = xsocket(AF_INET, SOCK_STREAM, 0);
+
+ if ((toys.optflags & FLAG_A) || (toys.optflags & FLAG_p)) {
+ if ((type = get_index(aftype,
+ (TT.af_type_A)?TT.af_type_A:TT.af_type_p)) != AF_INET)
+ error_exit((type != -1)?"only inet supported by kernel":"unknown family");
+ }
+
+ req.arp_ha.sa_family = ARPHRD_ETHER;
+ if (toys.optflags & FLAG_H) {
+ if ((type = get_index(hwtype, TT.hw_type)) != ARPHRD_ETHER)
+ error_exit((type != -1)?"h/w type not supported":"unknown h/w type");
+ req.arp_ha.sa_family = type;
+ }
+
+ if (((toys.optflags & FLAG_s) || toys.optflags & FLAG_d)) {
+ if (!toys.optargs[0]) error_exit("host name req");
+ resolve_host(toys.optargs[0], &sa);
+ memcpy(&req.arp_pa, &sa, sizeof(struct sockaddr));
+ }
+
+ if ((toys.optflags & FLAG_s) && !set_entry()) return;
+ if ((toys.optflags & FLAG_d) && !delete_entry()) return;
+
+ //show arp chache
+ fd = xopen("/proc/net/arp", O_RDONLY);
+ buf = get_line(fd);
+ free(buf); //skip first line
+
+ if (toys.optargs[0]) {
+ resolve_host(toys.optargs[0], &sa);
+ ip_to_host(&sa, NI_NUMERICHOST);
+ host_ip = xstrdup(toybuf);
+ }
+
+ while ((buf = get_line(fd))) {
+ char *host_name = "?";
+
+ if ((sscanf(buf, "%s 0x%x 0x%x %s %s %s\n", ip,
+ &h_type, &flag, hw_addr, mask, dev )) != 6) break;
+ entries++;
+ if (((toys.optflags & FLAG_H) && (get_index(hwtype, TT.hw_type) != h_type))
+ || ((toys.optflags & FLAG_i) && strcmp(TT.interface, dev))
+ || (toys.optargs[0] && strcmp(host_ip, ip))) {
+ free(buf);
+ continue;
+ }
+
+ resolve_host(buf, &sa);
+ if (!(toys.optflags & FLAG_n)) {
+ if (!ip_to_host(&sa, NI_NAMEREQD)) host_name = toybuf;
+ } else ip_to_host(&sa, NI_NUMERICHOST);
+
+ disp++;
+ printf("%s (%s) at" , host_name, ip);
+
+ for (i = 0; hwtype[i].name; i++)
+ if (hwtype[i].val & h_type) break;
+ if (!hwtype[i].name) error_exit("unknown h/w type");
+
+ if (!(flag & ATF_COM)) {
+ if ((flag & ATF_PUBL)) printf(" *");
+ else printf(" <incomplete>");
+ } else printf(" %s [%s]", hw_addr, hwtype[i].name);
+
+ if (flag & ATF_NETMASK) printf("netmask %s ", mask);
+
+ for (i = 0; flag_type[i].name; i++)
+ if (flag_type[i].val & flag) printf(" %s", flag_type[i].name);
+
+ printf(" on %s\n", dev);
+ free(buf);
+ }
+
+ if (toys.optflags & FLAG_v)
+ xprintf("Entries: %d\tSkipped: %d\tFound: %d\n",
+ entries, entries - disp, disp);
+ if (!disp) xprintf("No Match found in %d entries\n", entries);
+
+ if (CFG_TOYBOX_FREE) {
+ free(host_ip);
+ xclose(fd);
+ }
+}
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