+/*
+ * ipmaddr.c "ip maddress".
+ *
+ * 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.
+ *
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <syslog.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <linux/netdevice.h>
+#include <linux/if.h>
+#include <linux/if_arp.h>
+#include <linux/sockios.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+
+#include "rt_names.h"
+#include "utils.h"
+
+static struct {
+ char *dev;
+ int family;
+} filter;
+
+static void usage(void) __attribute__((noreturn));
+
+static void usage(void)
+{
+ fprintf(stderr, "Usage: ip maddr [ add | del ] MULTIADDR dev STRING\n");
+ fprintf(stderr, " ip maddr show [ dev STRING ]\n");
+ exit(-1);
+}
+
+static int parse_hex(char *str, unsigned char *addr)
+{
+ int len=0;
+
+ while (*str) {
+ int tmp;
+ if (str[1] == 0)
+ return -1;
+ if (sscanf(str, "%02x", &tmp) != 1)
+ return -1;
+ addr[len] = tmp;
+ len++;
+ str += 2;
+ }
+ return len;
+}
+
+struct ma_info
+{
+ struct ma_info *next;
+ int index;
+ int users;
+ char *features;
+ char name[IFNAMSIZ];
+ inet_prefix addr;
+};
+
+void maddr_ins(struct ma_info **lst, struct ma_info *m)
+{
+ struct ma_info *mp;
+
+ for (; (mp=*lst) != NULL; lst = &mp->next) {
+ if (mp->index > m->index)
+ break;
+ }
+ m->next = *lst;
+ *lst = m;
+}
+
+void read_dev_mcast(struct ma_info **result_p)
+{
+ char buf[256];
+ FILE *fp = fopen("/proc/net/dev_mcast", "r");
+
+ if (!fp)
+ return;
+
+ while (fgets(buf, sizeof(buf), fp)) {
+ char hexa[256];
+ struct ma_info m;
+ int len;
+ int st;
+
+ memset(&m, 0, sizeof(m));
+ sscanf(buf, "%d%s%d%d%s", &m.index, m.name, &m.users, &st,
+ hexa);
+ if (filter.dev && strcmp(filter.dev, m.name))
+ continue;
+
+ m.addr.family = AF_PACKET;
+
+ len = parse_hex(hexa, (unsigned char*)&m.addr.data);
+ if (len >= 0) {
+ struct ma_info *ma = malloc(sizeof(m));
+
+ memcpy(ma, &m, sizeof(m));
+ ma->addr.bytelen = len;
+ ma->addr.bitlen = len<<3;
+ if (st)
+ ma->features = "static";
+ maddr_ins(result_p, ma);
+ }
+ }
+ fclose(fp);
+}
+
+void read_igmp(struct ma_info **result_p)
+{
+ struct ma_info m;
+ char buf[256];
+ FILE *fp = fopen("/proc/net/igmp", "r");
+
+ if (!fp)
+ return;
+ memset(&m, 0, sizeof(m));
+ fgets(buf, sizeof(buf), fp);
+
+ m.addr.family = AF_INET;
+ m.addr.bitlen = 32;
+ m.addr.bytelen = 4;
+
+ while (fgets(buf, sizeof(buf), fp)) {
+ struct ma_info *ma = malloc(sizeof(m));
+
+ if (buf[0] != '\t') {
+ sscanf(buf, "%d%s", &m.index, m.name);
+ continue;
+ }
+
+ if (filter.dev && strcmp(filter.dev, m.name))
+ continue;
+
+ sscanf(buf, "%08x%d", (__u32*)&m.addr.data, &m.users);
+
+ ma = malloc(sizeof(m));
+ memcpy(ma, &m, sizeof(m));
+ maddr_ins(result_p, ma);
+ }
+ fclose(fp);
+}
+
+
+void read_igmp6(struct ma_info **result_p)
+{
+ char buf[256];
+ FILE *fp = fopen("/proc/net/igmp6", "r");
+
+ if (!fp)
+ return;
+
+ while (fgets(buf, sizeof(buf), fp)) {
+ char hexa[256];
+ struct ma_info m;
+ int len;
+
+ memset(&m, 0, sizeof(m));
+ sscanf(buf, "%d%s%s%d", &m.index, m.name, hexa, &m.users);
+
+ if (filter.dev && strcmp(filter.dev, m.name))
+ continue;
+
+ m.addr.family = AF_INET6;
+
+ len = parse_hex(hexa, (unsigned char*)&m.addr.data);
+ if (len >= 0) {
+ struct ma_info *ma = malloc(sizeof(m));
+
+ memcpy(ma, &m, sizeof(m));
+
+ ma->addr.bytelen = len;
+ ma->addr.bitlen = len<<3;
+ maddr_ins(result_p, ma);
+ }
+ }
+ fclose(fp);
+}
+
+static void print_maddr(FILE *fp, struct ma_info *list)
+{
+ fprintf(fp, "\t");
+
+ if (list->addr.family == AF_PACKET) {
+ SPRINT_BUF(b1);
+ fprintf(fp, "link %s", ll_addr_n2a((unsigned char*)list->addr.data,
+ list->addr.bytelen, 0,
+ b1, sizeof(b1)));
+ } else {
+ char abuf[256];
+ switch(list->addr.family) {
+ case AF_INET:
+ fprintf(fp, "inet ");
+ break;
+ case AF_INET6:
+ fprintf(fp, "inet6 ");
+ break;
+ default:
+ fprintf(fp, "family %d ", list->addr.family);
+ break;
+ }
+ fprintf(fp, "%s",
+ format_host(list->addr.family,
+ -1,
+ list->addr.data,
+ abuf, sizeof(abuf)));
+ }
+ if (list->users != 1)
+ fprintf(fp, " users %d", list->users);
+ if (list->features)
+ fprintf(fp, " %s", list->features);
+ fprintf(fp, "\n");
+}
+
+static void print_mlist(FILE *fp, struct ma_info *list)
+{
+ int cur_index = 0;
+
+ for (; list; list = list->next) {
+ if (oneline) {
+ cur_index = list->index;
+ fprintf(fp, "%d:\t%s%s", cur_index, list->name, _SL_);
+ } else if (cur_index != list->index) {
+ cur_index = list->index;
+ fprintf(fp, "%d:\t%s\n", cur_index, list->name);
+ }
+ print_maddr(fp, list);
+ }
+}
+
+static int multiaddr_list(int argc, char **argv)
+{
+ struct ma_info *list = NULL;
+
+ if (!filter.family)
+ filter.family = preferred_family;
+
+ while (argc > 0) {
+ if (1) {
+ if (strcmp(*argv, "dev") == 0) {
+ NEXT_ARG();
+ }
+ if (matches(*argv, "help") == 0)
+ usage();
+ if (filter.dev)
+ duparg2("dev", *argv);
+ filter.dev = *argv;
+ }
+ argv++; argc--;
+ }
+
+ if (!filter.family || filter.family == AF_PACKET)
+ read_dev_mcast(&list);
+ if (!filter.family || filter.family == AF_INET)
+ read_igmp(&list);
+ if (!filter.family || filter.family == AF_INET6)
+ read_igmp6(&list);
+ print_mlist(stdout, list);
+ return 0;
+}
+
+int multiaddr_modify(int cmd, int argc, char **argv)
+{
+ struct ifreq ifr;
+ int fd;
+
+ memset(&ifr, 0, sizeof(ifr));
+
+ if (cmd == RTM_NEWADDR)
+ cmd = SIOCADDMULTI;
+ else
+ cmd = SIOCDELMULTI;
+
+ while (argc > 0) {
+ if (strcmp(*argv, "dev") == 0) {
+ NEXT_ARG();
+ if (ifr.ifr_name[0])
+ duparg("dev", *argv);
+ strncpy(ifr.ifr_name, *argv, IFNAMSIZ);
+ } else {
+ if (matches(*argv, "address") == 0) {
+ NEXT_ARG();
+ }
+ if (matches(*argv, "help") == 0)
+ usage();
+ if (ifr.ifr_hwaddr.sa_data[0])
+ duparg("address", *argv);
+ if (ll_addr_a2n(ifr.ifr_hwaddr.sa_data, 14, *argv) < 0) {
+ fprintf(stderr, "Error: \"%s\" is not a legal ll address.\n", *argv);
+ exit(1);
+ }
+ }
+ argc--; argv++;
+ }
+ if (ifr.ifr_name[0] == 0) {
+ fprintf(stderr, "Not enough information: \"dev\" is required.\n");
+ exit(-1);
+ }
+
+ fd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ perror("Cannot create socket");
+ exit(1);
+ }
+ if (ioctl(fd, cmd, (char*)&ifr) != 0) {
+ perror("ioctl");
+ exit(1);
+ }
+ close(fd);
+
+ exit(0);
+}
+
+
+int do_multiaddr(int argc, char **argv)
+{
+ if (argc < 1)
+ return multiaddr_list(0, NULL);
+ if (matches(*argv, "add") == 0)
+ return multiaddr_modify(RTM_NEWADDR, argc-1, argv+1);
+ if (matches(*argv, "delete") == 0)
+ return multiaddr_modify(RTM_DELADDR, argc-1, argv+1);
+ if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
+ || matches(*argv, "lst") == 0)
+ return multiaddr_list(argc-1, argv+1);
+ if (matches(*argv, "help") == 0)
+ usage();
+ fprintf(stderr, "Command \"%s\" is unknown, try \"ip maddr help\".\n", *argv);
+ exit(-1);
+}
projects / mirror_iproute2.git / blobdiff