{
char buf[INET6_ADDRSTRLEN], prefix[INET6_ADDRSTRLEN + 4];
int pid;
-
+
if (argc <= 1) {
fprintf(stderr, "Usage: %s <name> [ifname] [ipv6prefix] [ipv4addr] [ipv6addr]\n", argv[0]);
return 1;
}
-
+
snprintf(buf, sizeof(buf), "/var/run/%s.pid", argv[1]);
FILE *fp = fopen(buf, "r");
if (fp) {
unlink(buf);
fclose(fp);
}
-
+
if (!argv[2])
return 0;
-
+
if (!argv[3] || !argv[4] || !(fp = fopen(buf, "wx")))
return 1;
strcat(prefix, "/96");
freeaddrinfo(res);
}
-
+
int i = 0;
int sock;
struct sockaddr_in6 saddr;
sleep(3);
i++;
} while (i < 3);
-
+
struct ipv6_mreq mreq = {saddr.sin6_addr, if_nametoindex(argv[2])};
if (!argv[5]) {
if (IN6_IS_ADDR_LINKLOCAL(&mreq.ipv6mr_multiaddr))
} else if (inet_pton(AF_INET6, argv[5], &mreq.ipv6mr_multiaddr) != 1) {
return 1;
}
-
+
if (setsockopt(sock, SOL_IPV6, IPV6_JOIN_ANYCAST, &mreq, sizeof(mreq)))
return 3;
-
+
inet_ntop(AF_INET6, &mreq.ipv6mr_multiaddr, buf, sizeof(buf));
fputs(buf, stdout);
fputc('\n', stdout);
fflush(stdout);
-
+
FILE *nat46 = fopen("/proc/net/nat46/control", "w");
if (!nat46 || fprintf(nat46, "add %s\nconfig %s local.style NONE local.v4 %s/32 local.v6 %s/128 "
"remote.style RFC6052 remote.v6 %s\n", argv[1], argv[1], argv[4], buf, prefix) < 0 ||
fclose(nat46))
return 4;
-
+
if (!(pid = fork())) {
fclose(fp);
fclose(stdin);
rewind(fp);
fprintf(fp, "%d\n", pid);
}
-
+
return 0;
}