Commit 80a64f56 authored by Juliusz Chroboczek's avatar Juliusz Chroboczek

Add code to determine router id automatically.

parent 1c49d6c6
......@@ -94,7 +94,7 @@ int
main(int argc, char **argv)
{
struct sockaddr_in6 sin6;
int i, rc, fd;
int i, rc, fd, rfd, have_id = 0;
struct timeval check_neighbours_time;
int expiry_time, kernel_dump_time;
char *config_file = NULL;
......@@ -245,25 +245,100 @@ main(int argc, char **argv)
if(seqno_interval <= 0)
seqno_interval = MAX(wireless_hello_interval - 1, 2);
rc = parse_address(*arg, myid, NULL);
if(rc < 0)
goto syntax;
SHIFTE();
rc = kernel_setup(1);
if(rc < 0) {
fprintf(stderr, "kernel_setup failed.\n");
exit(1);
}
rc = kernel_setup_socket(1);
if(rc < 0) {
fprintf(stderr, "kernel_setup_socket failed.\n");
kernel_setup(0);
exit(1);
}
gettimeofday(&now, NULL);
fd = open("/dev/urandom", O_RDONLY);
if(fd < 0) {
rfd = open("/dev/urandom", O_RDONLY);
if(rfd < 0) {
perror("open(random)");
}
rc = parse_address(*arg, myid, NULL);
if(rc >= 0) {
have_id = 1;
/* Cannot use SHIFTE -- need to goto fail */
SHIFT();
if(*arg == NULL) {
fprintf(stderr, "No interfaces given.\n");
goto fail;
}
} else {
struct kernel_route routes[240];
rc = kernel_addresses(routes, 240);
if(rc > 0) {
/* Search for a global IPv6 address */
for(i = 0; i < rc; i++) {
if(martian_prefix(routes[i].prefix, routes[i].plen))
continue;
if(routes[i].plen == 128 &&
(routes[i].prefix[0] & 0xE0) == 0x20) {
memcpy(myid, routes[i].prefix, 16);
have_id = 1;
break;
}
}
/* Try a global Ipv4 address */
if(!have_id) {
for(i = 0; i < rc; i++) {
if(martian_prefix(routes[i].prefix, routes[i].plen))
continue;
if(routes[i].plen == 128 &&
v4mapped(routes[i].prefix) &&
routes[i].prefix[12] != 10 &&
(routes[i].prefix[12] != 172 ||
routes[i].prefix[13] != 16) &&
(routes[i].prefix[12] != 192 ||
routes[i].prefix[13] != 168)) {
memcpy(myid, routes[i].prefix, 16);
have_id = 1;
break;
}
}
}
}
}
if(!have_id) {
if(rfd < 0) {
fprintf(stderr, "Couldn't find suitable router-id.\n");
goto fail;
}
fprintf(stderr,
"Warning: couldn't find suitable router-id, "
"using random value.\n");
rc = read(rfd, myid, 16);
if(rc < 16) {
perror("read(random)");
goto fail;
} else {
have_id = 1;
}
}
if(random < 0) {
memcpy(&seed, myid + 12, 4);
} else {
rc = read(fd, &seed, sizeof(unsigned int));
rc = read(rfd, &seed, sizeof(unsigned int));
if(rc < sizeof(unsigned int)) {
perror("read(random)");
exit(1);
goto fail;
}
close(fd);
close(rfd);
rfd = -1;
}
seed ^= (now.tv_sec ^ now.tv_usec);
srandom(seed);
......@@ -312,24 +387,13 @@ main(int argc, char **argv)
}
}
close(fd);
fd = -1;
}
if(reboot_time + silent_time > now.tv_sec)
fprintf(stderr, "Respecting %ld second silent time.\n",
(long int)(reboot_time + silent_time - now.tv_sec));
rc = kernel_setup(1);
if(rc < 0) {
fprintf(stderr, "kernel_setup failed.\n");
exit(1);
}
rc = kernel_setup_socket(1);
if(rc < 0) {
fprintf(stderr, "kernel_setup_socket failed.\n");
exit(1);
}
protocol_socket = babel_socket(protocol_port);
if(protocol_socket < 0) {
perror("Couldn't create link local socket");
......
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