static bool recalc_brl_timeout(void)
{
struct blocking_lock_record *blr;
struct timeval next_timeout;
TALLOC_FREE(brl_timeout);
next_timeout = timeval_zero();
for (blr = blocking_lock_queue; blr; blr = blr->next) {
if (timeval_is_zero(&blr->expire_time)) {
/*
* If we're blocked on pid 0xFFFFFFFF this is
* a POSIX lock, so calculate a timeout of
* 10 seconds into the future.
*/
if (blr->blocking_pid == 0xFFFFFFFF) {
struct timeval psx_to = timeval_current_ofs(10, 0);
next_timeout = timeval_min(&next_timeout, &psx_to);
}
continue;
}
if (timeval_is_zero(&next_timeout)) {
next_timeout = blr->expire_time;
}
else {
next_timeout = timeval_min(&next_timeout,
&blr->expire_time);
}
}
if (timeval_is_zero(&next_timeout)) {
DEBUG(10, ("Next timeout = Infinite.\n"));
return True;
}
if (DEBUGLVL(10)) {
struct timeval cur, from_now;
cur = timeval_current();
from_now = timeval_until(&cur, &next_timeout);
DEBUG(10, ("Next timeout = %d.%d seconds from now.\n",
(int)from_now.tv_sec, (int)from_now.tv_usec));
}
if (!(brl_timeout = event_add_timed(smbd_event_context(), NULL,
next_timeout,
brl_timeout_fn, NULL))) {
return False;
}
return True;
}
struct timeval timeval_brl_min(const struct timeval *tv1,
const struct timeval *tv2)
{
if (timeval_is_zero(tv1)) {
return *tv2;
}
if (timeval_is_zero(tv2)) {
return *tv1;
}
return timeval_min(tv1, tv2);
}
void
recompute_resend_time()
{
struct resend *request;
struct timeval resend = {0, 0};
request = to_resend;
while(request) {
if(!resend_expired(request) && request->delay > 0 && request->max > 0) {
struct timeval timeout;
timeval_add_msec(&timeout, &request->time, request->delay);
timeval_min(&resend, &timeout);
}
request = request->next;
}
resend_time = resend;
}
static bool recalc_brl_timeout(struct smbd_server_connection *sconn)
{
struct blocking_lock_record *blr;
struct timeval next_timeout;
int max_brl_timeout = lp_parm_int(-1, "brl", "recalctime", 5);
TALLOC_FREE(sconn->smb1.locks.brl_timeout);
next_timeout = timeval_zero();
for (blr = sconn->smb1.locks.blocking_lock_queue; blr; blr = blr->next) {
if (timeval_is_zero(&blr->expire_time)) {
/*
* If we're blocked on pid 0xFFFFFFFFFFFFFFFFLL this is
* a POSIX lock, so calculate a timeout of
* 10 seconds into the future.
*/
if (blr->blocking_smblctx == 0xFFFFFFFFFFFFFFFFLL) {
struct timeval psx_to = timeval_current_ofs(10, 0);
next_timeout = timeval_brl_min(&next_timeout, &psx_to);
}
continue;
}
next_timeout = timeval_brl_min(&next_timeout, &blr->expire_time);
}
if (timeval_is_zero(&next_timeout)) {
DEBUG(10, ("Next timeout = Infinite.\n"));
return True;
}
/*
to account for unclean shutdowns by clients we need a
maximum timeout that we use for checking pending locks. If
we have any pending locks at all, then check if the pending
lock can continue at least every brl:recalctime seconds
(default 5 seconds).
This saves us needing to do a message_send_all() in the
SIGCHLD handler in the parent daemon. That
message_send_all() caused O(n^2) work to be done when IP
failovers happened in clustered Samba, which could make the
entire system unusable for many minutes.
*/
if (max_brl_timeout > 0) {
struct timeval min_to = timeval_current_ofs(max_brl_timeout, 0);
next_timeout = timeval_min(&next_timeout, &min_to);
}
if (DEBUGLVL(10)) {
struct timeval cur, from_now;
cur = timeval_current();
from_now = timeval_until(&cur, &next_timeout);
DEBUG(10, ("Next timeout = %d.%d seconds from now.\n",
(int)from_now.tv_sec, (int)from_now.tv_usec));
}
sconn->smb1.locks.brl_timeout = tevent_add_timer(sconn->ev_ctx,
NULL, next_timeout,
brl_timeout_fn, sconn);
if (sconn->smb1.locks.brl_timeout == NULL) {
return False;
}
return True;
}
int
record_resend(int kind, const unsigned char *prefix, unsigned char plen,
const unsigned char *src_prefix, unsigned char src_plen,
unsigned short seqno, const unsigned char *id,
struct interface *ifp, int delay)
{
struct resend *resend;
unsigned int ifindex = ifp ? ifp->ifindex : 0;
if((kind == RESEND_REQUEST &&
input_filter(NULL, prefix, plen, src_prefix, src_plen, NULL,
ifindex) >=
INFINITY) ||
(kind == RESEND_UPDATE &&
output_filter(NULL, prefix, plen, src_prefix, src_plen, ifindex) >=
INFINITY))
return 0;
if(delay >= 0xFFFF)
delay = 0xFFFF;
resend = find_resend(kind, prefix, plen, src_prefix, src_plen, NULL);
if(resend) {
if(resend->delay && delay)
resend->delay = MIN(resend->delay, delay);
else if(delay)
resend->delay = delay;
resend->time = now;
resend->max = RESEND_MAX;
if(id && memcmp(resend->id, id, 8) == 0 &&
seqno_compare(resend->seqno, seqno) > 0) {
return 0;
}
if(id)
memcpy(resend->id, id, 8);
else
memset(resend->id, 0, 8);
resend->seqno = seqno;
if(resend->ifp != ifp)
resend->ifp = NULL;
} else {
resend = calloc(1, sizeof(struct resend));
if(resend == NULL)
return -1;
resend->kind = kind;
resend->max = RESEND_MAX;
resend->delay = delay;
memcpy(resend->prefix, prefix, 16);
resend->plen = plen;
memcpy(resend->src_prefix, src_prefix, 16);
resend->src_plen = src_plen;
resend->seqno = seqno;
if(id)
memcpy(resend->id, id, 8);
resend->ifp = ifp;
resend->time = now;
resend->next = to_resend;
to_resend = resend;
}
if(resend->delay) {
struct timeval timeout;
timeval_add_msec(&timeout, &resend->time, resend->delay);
timeval_min(&resend_time, &timeout);
}
return 1;
}
int
main(int argc, char **argv)
{
struct sockaddr_in6 sin6;
int rc, fd, i, opt;
time_t expiry_time, source_expiry_time, kernel_dump_time;
const char **config_files = NULL;
int num_config_files = 0;
void *vrc;
unsigned int seed;
struct interface *ifp;
gettime(&now);
rc = read_random_bytes(&seed, sizeof(seed));
if(rc < 0) {
perror("read(random)");
seed = 42;
}
seed ^= (now.tv_sec ^ now.tv_usec);
srandom(seed);
parse_address("ff02:0:0:0:0:0:1:6", protocol_group, NULL);
protocol_port = 6696;
change_smoothing_half_life(4);
has_ipv6_subtrees = kernel_has_ipv6_subtrees();
while(1) {
opt = getopt(argc, argv,
"m:p:h:H:i:k:A:sruS:d:g:G:lwz:M:t:T:c:C:DL:I:V");
if(opt < 0)
break;
switch(opt) {
case 'm':
rc = parse_address(optarg, protocol_group, NULL);
if(rc < 0)
goto usage;
if(protocol_group[0] != 0xff) {
fprintf(stderr,
"%s is not a multicast address\n", optarg);
goto usage;
}
if(protocol_group[1] != 2) {
fprintf(stderr,
"Warning: %s is not a link-local multicast address\n",
optarg);
}
break;
case 'p':
protocol_port = parse_nat(optarg);
if(protocol_port <= 0 || protocol_port > 0xFFFF)
goto usage;
break;
case 'h':
default_wireless_hello_interval = parse_thousands(optarg);
if(default_wireless_hello_interval <= 0 ||
default_wireless_hello_interval > 0xFFFF * 10)
goto usage;
break;
case 'H':
default_wired_hello_interval = parse_thousands(optarg);
if(default_wired_hello_interval <= 0 ||
default_wired_hello_interval > 0xFFFF * 10)
goto usage;
break;
case 'k':
kernel_metric = parse_nat(optarg);
if(kernel_metric < 0 || kernel_metric > 0xFFFF)
goto usage;
break;
case 'A':
allow_duplicates = parse_nat(optarg);
if(allow_duplicates < 0 || allow_duplicates > 0xFFFF)
goto usage;
break;
case 's':
split_horizon = 0;
break;
case 'r':
random_id = 1;
break;
case 'u':
keep_unfeasible = 1;
break;
case 'S':
state_file = optarg;
break;
case 'd':
debug = parse_nat(optarg);
if(debug < 0)
goto usage;
break;
case 'g':
case 'G':
if(opt == 'g')
local_server_write = 0;
else
local_server_write = 1;
if(optarg[0] == '/') {
local_server_port = -1;
free(local_server_path);
local_server_path = strdup(optarg);
} else {
local_server_port = parse_nat(optarg);
free(local_server_path);
local_server_path = NULL;
if(local_server_port <= 0 || local_server_port > 0xFFFF)
goto usage;
}
break;
case 'l':
link_detect = 1;
break;
case 'w':
all_wireless = 1;
break;
case 'z':
{
char *comma;
diversity_kind = (int)strtol(optarg, &comma, 0);
if(*comma == '\0')
diversity_factor = 128;
else if(*comma == ',')
diversity_factor = parse_nat(comma + 1);
else
goto usage;
if(diversity_factor <= 0 || diversity_factor > 256)
goto usage;
}
break;
case 'M': {
int l = parse_nat(optarg);
if(l < 0 || l > 3600)
goto usage;
change_smoothing_half_life(l);
break;
}
case 't':
export_table = parse_nat(optarg);
if(export_table < 0 || export_table > 0xFFFF)
goto usage;
break;
case 'T':
if(add_import_table(parse_nat(optarg)))
goto usage;
break;
case 'c':
config_files = realloc(config_files,
(num_config_files + 1) * sizeof(char*));
if(config_files == NULL) {
fprintf(stderr, "Couldn't allocate config file.\n");
exit(1);
}
config_files[num_config_files++] = optarg;
break;
case 'C':
rc = parse_config_from_string(optarg, strlen(optarg), NULL);
if(rc != CONFIG_ACTION_DONE) {
fprintf(stderr,
"Couldn't parse configuration from command line.\n");
exit(1);
}
break;
case 'D':
do_daemonise = 1;
break;
case 'L':
logfile = optarg;
break;
case 'I':
pidfile = optarg;
break;
case 'V':
fprintf(stderr, "%s\n", BABELD_VERSION);
exit(0);
break;
default:
goto usage;
}
}
if(num_config_files == 0) {
if(access("/etc/babeld.conf", F_OK) >= 0) {
config_files = malloc(sizeof(char*));
if(config_files == NULL) {
fprintf(stderr, "Couldn't allocate config file.\n");
exit(1);
}
config_files[num_config_files++] = "/etc/babeld.conf";
}
}
for(i = 0; i < num_config_files; i++) {
int line;
rc = parse_config_from_file(config_files[i], &line);
if(rc < 0) {
fprintf(stderr,
"Couldn't parse configuration from file %s "
"(error at line %d).\n",
config_files[i], line);
exit(1);
}
}
free(config_files);
if(default_wireless_hello_interval <= 0)
default_wireless_hello_interval = 4000;
default_wireless_hello_interval = MAX(default_wireless_hello_interval, 5);
if(default_wired_hello_interval <= 0)
default_wired_hello_interval = 4000;
default_wired_hello_interval = MAX(default_wired_hello_interval, 5);
resend_delay = 2000;
resend_delay = MIN(resend_delay, default_wireless_hello_interval / 2);
resend_delay = MIN(resend_delay, default_wired_hello_interval / 2);
resend_delay = MAX(resend_delay, 20);
if(do_daemonise) {
if(logfile == NULL)
logfile = "/var/log/babeld.log";
}
rc = reopen_logfile();
if(rc < 0) {
perror("reopen_logfile()");
exit(1);
}
fd = open("/dev/null", O_RDONLY);
if(fd < 0) {
perror("open(null)");
exit(1);
}
rc = dup2(fd, 0);
if(rc < 0) {
perror("dup2(null, 0)");
exit(1);
}
close(fd);
if(do_daemonise) {
rc = daemonise();
if(rc < 0) {
perror("daemonise");
exit(1);
}
}
if(pidfile && pidfile[0] != '\0') {
int pfd, len;
char buf[100];
len = snprintf(buf, 100, "%lu", (unsigned long)getpid());
if(len < 0 || len >= 100) {
perror("snprintf(getpid)");
exit(1);
}
pfd = open(pidfile, O_WRONLY | O_CREAT | O_EXCL, 0644);
if(pfd < 0) {
char buf[40];
snprintf(buf, 40, "creat(%s)", pidfile);
buf[39] = '\0';
perror(buf);
exit(1);
}
rc = write(pfd, buf, len);
if(rc < len) {
perror("write(pidfile)");
goto fail_pid;
}
close(pfd);
}
rc = kernel_setup(1);
if(rc < 0) {
fprintf(stderr, "kernel_setup failed.\n");
goto fail_pid;
}
rc = kernel_setup_socket(1);
if(rc < 0) {
fprintf(stderr, "kernel_setup_socket failed.\n");
kernel_setup(0);
goto fail_pid;
}
rc = finalise_config();
if(rc < 0) {
fprintf(stderr, "Couldn't finalise configuration.\n");
goto fail;
}
for(i = optind; i < argc; i++) {
vrc = add_interface(argv[i], NULL);
if(vrc == NULL)
goto fail;
}
if(interfaces == NULL) {
fprintf(stderr, "Eek... asked to run on no interfaces!\n");
goto fail;
}
if(!have_id && !random_id) {
/* We use all available interfaces here, since this increases the
chances of getting a stable router-id in case the set of Babel
interfaces changes. */
for(i = 1; i < 256; i++) {
char buf[IF_NAMESIZE], *ifname;
unsigned char eui[8];
ifname = if_indextoname(i, buf);
if(ifname == NULL)
continue;
rc = if_eui64(ifname, i, eui);
if(rc < 0)
continue;
memcpy(myid, eui, 8);
have_id = 1;
break;
}
}
if(!have_id) {
if(!random_id)
fprintf(stderr,
"Warning: couldn't find router id -- "
"using random value.\n");
rc = read_random_bytes(myid, 8);
if(rc < 0) {
perror("read(random)");
goto fail;
}
/* Clear group and global bits */
myid[0] &= ~3;
}
myseqno = (random() & 0xFFFF);
fd = open(state_file, O_RDONLY);
if(fd < 0 && errno != ENOENT)
perror("open(babel-state)");
rc = unlink(state_file);
if(fd >= 0 && rc < 0) {
perror("unlink(babel-state)");
/* If we couldn't unlink it, it's probably stale. */
close(fd);
fd = -1;
}
if(fd >= 0) {
char buf[100];
int s;
rc = read(fd, buf, 99);
if(rc < 0) {
perror("read(babel-state)");
} else {
buf[rc] = '\0';
rc = sscanf(buf, "%d\n", &s);
if(rc == 1 && s >= 0 && s <= 0xFFFF) {
myseqno = seqno_plus(s, 1);
} else {
fprintf(stderr, "Couldn't parse babel-state.\n");
}
}
close(fd);
fd = -1;
}
protocol_socket = babel_socket(protocol_port);
if(protocol_socket < 0) {
perror("Couldn't create link local socket");
goto fail;
}
if(local_server_port >= 0) {
local_server_socket = tcp_server_socket(local_server_port, 1);
if(local_server_socket < 0) {
perror("local_server_socket");
goto fail;
}
} else if(local_server_path) {
local_server_socket = unix_server_socket(local_server_path);
if(local_server_socket < 0) {
perror("local_server_socket");
goto fail;
}
}
init_signals();
rc = resize_receive_buffer(1500);
if(rc < 0)
goto fail;
if(receive_buffer == NULL)
goto fail;
check_interfaces();
rc = check_xroutes(0);
if(rc < 0)
fprintf(stderr, "Warning: couldn't check exported routes.\n");
rc = check_rules();
if(rc < 0)
fprintf(stderr, "Warning: couldn't check rules.\n");
kernel_routes_changed = 0;
kernel_rules_changed = 0;
kernel_link_changed = 0;
kernel_addr_changed = 0;
kernel_dump_time = now.tv_sec + roughly(30);
schedule_neighbours_check(5000, 1);
schedule_interfaces_check(30000, 1);
expiry_time = now.tv_sec + roughly(30);
source_expiry_time = now.tv_sec + roughly(300);
/* Make some noise so that others notice us, and send retractions in
case we were restarted recently */
FOR_ALL_INTERFACES(ifp) {
if(!if_up(ifp))
continue;
/* Apply jitter before we send the first message. */
usleep(roughly(10000));
gettime(&now);
send_hello(ifp);
send_wildcard_retraction(ifp);
}
FOR_ALL_INTERFACES(ifp) {
if(!if_up(ifp))
continue;
usleep(roughly(10000));
gettime(&now);
send_hello(ifp);
send_wildcard_retraction(ifp);
send_self_update(ifp);
send_request(ifp, NULL, 0, NULL, 0);
flushupdates(ifp);
flushbuf(ifp);
}
debugf("Entering main loop.\n");
while(1) {
struct timeval tv;
fd_set readfds;
gettime(&now);
tv = check_neighbours_timeout;
timeval_min(&tv, &check_interfaces_timeout);
timeval_min_sec(&tv, expiry_time);
timeval_min_sec(&tv, source_expiry_time);
timeval_min_sec(&tv, kernel_dump_time);
timeval_min(&tv, &resend_time);
FOR_ALL_INTERFACES(ifp) {
if(!if_up(ifp))
continue;
timeval_min(&tv, &ifp->flush_timeout);
timeval_min(&tv, &ifp->hello_timeout);
timeval_min(&tv, &ifp->update_timeout);
timeval_min(&tv, &ifp->update_flush_timeout);
}
timeval_min(&tv, &unicast_flush_timeout);
FD_ZERO(&readfds);
if(timeval_compare(&tv, &now) > 0) {
int maxfd = 0;
timeval_minus(&tv, &tv, &now);
FD_SET(protocol_socket, &readfds);
maxfd = MAX(maxfd, protocol_socket);
if(kernel_socket < 0) kernel_setup_socket(1);
if(kernel_socket >= 0) {
FD_SET(kernel_socket, &readfds);
maxfd = MAX(maxfd, kernel_socket);
}
if(local_server_socket >= 0 &&
num_local_sockets < MAX_LOCAL_SOCKETS) {
FD_SET(local_server_socket, &readfds);
maxfd = MAX(maxfd, local_server_socket);
}
for(i = 0; i < num_local_sockets; i++) {
FD_SET(local_sockets[i].fd, &readfds);
maxfd = MAX(maxfd, local_sockets[i].fd);
}
rc = select(maxfd + 1, &readfds, NULL, NULL, &tv);
if(rc < 0) {
if(errno != EINTR) {
perror("select");
sleep(1);
}
rc = 0;
FD_ZERO(&readfds);
}
}
gettime(&now);
if(exiting)
break;
if(kernel_socket >= 0 && FD_ISSET(kernel_socket, &readfds)) {
struct kernel_filter filter = {0};
filter.route = kernel_route_notify;
filter.addr = kernel_addr_notify;
filter.link = kernel_link_notify;
filter.rule = kernel_rule_notify;
kernel_callback(&filter);
}
if(FD_ISSET(protocol_socket, &readfds)) {
rc = babel_recv(protocol_socket,
receive_buffer, receive_buffer_size,
(struct sockaddr*)&sin6, sizeof(sin6));
if(rc < 0) {
if(errno != EAGAIN && errno != EINTR) {
perror("recv");
sleep(1);
}
} else {
FOR_ALL_INTERFACES(ifp) {
if(!if_up(ifp))
continue;
if(ifp->ifindex == sin6.sin6_scope_id) {
parse_packet((unsigned char*)&sin6.sin6_addr, ifp,
receive_buffer, rc);
VALGRIND_MAKE_MEM_UNDEFINED(receive_buffer,
receive_buffer_size);
break;
}
}
}
}
if(local_server_socket >= 0 && FD_ISSET(local_server_socket, &readfds))
accept_local_connections();
i = 0;
while(i < num_local_sockets) {
if(FD_ISSET(local_sockets[i].fd, &readfds)) {
rc = local_read(&local_sockets[i]);
if(rc <= 0) {
if(rc < 0) {
if(errno == EINTR || errno == EAGAIN)
continue;
perror("read(local_socket)");
}
local_socket_destroy(i);
}
}
i++;
}
if(reopening) {
kernel_dump_time = now.tv_sec;
check_neighbours_timeout = now;
expiry_time = now.tv_sec;
rc = reopen_logfile();
if(rc < 0) {
perror("reopen_logfile");
break;
}
reopening = 0;
}
if(kernel_link_changed || kernel_addr_changed) {
check_interfaces();
kernel_link_changed = 0;
}
if(kernel_routes_changed || kernel_addr_changed ||
kernel_rules_changed || now.tv_sec >= kernel_dump_time) {
rc = check_xroutes(1);
if(rc < 0)
fprintf(stderr, "Warning: couldn't check exported routes.\n");
rc = check_rules();
if(rc < 0)
fprintf(stderr, "Warning: couldn't check rules.\n");
kernel_routes_changed = kernel_rules_changed =
kernel_addr_changed = 0;
if(kernel_socket >= 0)
kernel_dump_time = now.tv_sec + roughly(300);
else
kernel_dump_time = now.tv_sec + roughly(30);
}
if(timeval_compare(&check_neighbours_timeout, &now) < 0) {
int msecs;
msecs = check_neighbours();
/* Multiply by 3/2 to allow neighbours to expire. */
msecs = MAX(3 * msecs / 2, 10);
schedule_neighbours_check(msecs, 1);
}
if(timeval_compare(&check_interfaces_timeout, &now) < 0) {
check_interfaces();
schedule_interfaces_check(30000, 1);
}
if(now.tv_sec >= expiry_time) {
expire_routes();
expire_resend();
expiry_time = now.tv_sec + roughly(30);
}
if(now.tv_sec >= source_expiry_time) {
expire_sources();
source_expiry_time = now.tv_sec + roughly(300);
}
FOR_ALL_INTERFACES(ifp) {
if(!if_up(ifp))
continue;
if(timeval_compare(&now, &ifp->hello_timeout) >= 0)
send_hello(ifp);
if(timeval_compare(&now, &ifp->update_timeout) >= 0)
send_update(ifp, 0, NULL, 0, NULL, 0);
if(timeval_compare(&now, &ifp->update_flush_timeout) >= 0)
flushupdates(ifp);
}
if(resend_time.tv_sec != 0) {
if(timeval_compare(&now, &resend_time) >= 0)
do_resend();
}
if(unicast_flush_timeout.tv_sec != 0) {
if(timeval_compare(&now, &unicast_flush_timeout) >= 0)
flush_unicast(1);
}
FOR_ALL_INTERFACES(ifp) {
if(!if_up(ifp))
continue;
if(ifp->flush_timeout.tv_sec != 0) {
if(timeval_compare(&now, &ifp->flush_timeout) >= 0)
flushbuf(ifp);
}
}
if(UNLIKELY(debug || dumping)) {
dump_tables(stdout);
dumping = 0;
}
}
int
main(int argc, char **argv)
{
int i, opt, rc;
int sock;
struct timeval now;
gettime(&now);
inet_pton(AF_INET6, "ff02::1:6", &babel_group);
babel_port = 6696;
srand(now.tv_sec ^ now.tv_usec);
while(1) {
opt = getopt(argc, argv, "p:u:h:c:");
if(opt < 0)
break;
switch(opt) {
case 'p': /* prefix */
if(have_prefix)
goto usage;
rc = inet_pton(AF_INET6, optarg, &myprefix);
if(rc != 1)
goto usage;
have_prefix = 1;
break;
case 'u': /* update interval */
update_interval = atoi(optarg);
if(update_interval <= 0)
goto usage;
break;
case 'h': /* hello interval */
hello_interval = atoi(optarg);
if(hello_interval <= 0)
goto usage;
break;
case 'c': /* link cost */
link_cost = atoi(optarg);
if(link_cost <= 0)
goto usage;
break;
default:
goto usage;
}
}
if(!have_prefix)
fprintf(stderr, "Warning: you didn't ask me to announce a prefix.\n");
if(argc - optind > MAXINTERFACES) {
fprintf(stderr, "Too many interfaces.\n");
exit(1);
}
for(i = 0; i < argc - optind; i++) {
int index;
index = if_nametoindex(argv[optind + i]);
if(index <= 0) {
fprintf(stderr, "Unknown interface %s\n", argv[i]);
exit(1);
}
memset(&interfaces[i], 0, sizeof(interfaces[i]));
interfaces[i].ifindex = index;
interfaces[i].ifname = argv[optind + i];
rc = get_local_address(interfaces[i].ifindex, &interfaces[i].address);
if(rc < 0) {
perror("get_local_address");
fprintf(stderr, "Continuing anyway -- "
"won't perform reachibility detection "
"on interface %s.\n", interfaces[i].ifname);
}
interfaces[i].seqno = rand() & 0xFFFF;
}
numinterfaces = argc - optind;
random_eui64(my_router_id);
myseqno = rand() & 0xFFFF;
sock = babel_socket(babel_port);
if(sock < 0) {
perror("babel_socket");
exit(1);
}
for(i = 0; i < numinterfaces; i++) {
rc = join_group(sock, interfaces[i].ifindex, &babel_group);
if(rc < 0) {
perror("setsockopt(IPV6_JOIN_GROUP)");
exit(1);
}
}
catch_signals(sigexit);
while(!exiting) {
struct sockaddr_in6 sin6;
unsigned char buf[BUF_SIZE];
struct timeval tv, update, zerotv = {0, 0};
fd_set readfds;
int hello_count = 0;
/* Compute when to wake up. */
gettime(&now);
timeval_add_msec(&tv, &last_hello, hello_interval * 700 + rand() % 300);
timeval_add_msec(&update, &last_update,
update_interval * 700 + rand() % 300);
timeval_min(&tv, &update);
if(selected_nexthop_metric < INFINITY) {
int n = find_neighbour(selected_interface, &selected_nexthop, 0);
assert(n >= 0);
timeval_min(&tv, &neighbours[n].timeout);
timeval_min(&tv, &selected_nexthop_timeout);
}
if(timeval_compare(&tv, &now) > 0)
timeval_minus(&tv, &tv, &now);
else
tv = zerotv;
FD_ZERO(&readfds);
FD_SET(sock, &readfds);
rc = select(sock + 1, &readfds, NULL, NULL, &tv);
if(rc < 0 && errno != EINTR) {
perror("select");
nap(1000);
continue;
}
if(rc > 0) {
/* Oh good, a packet. */
socklen_t sin6len = sizeof(sin6);
rc = recvfrom(sock, buf, BUF_SIZE, 0,
(struct sockaddr*)&sin6, &sin6len);
if(rc < 0 || rc >= BUF_SIZE) {
if(rc < 0 && errno != EAGAIN) {
perror("recv");
nap(100);
}
continue;
}
if(sin6.sin6_family != PF_INET6) {
fprintf(stderr, "Received unexpected packet in family %d.\n",
sin6.sin6_family);
nap(100);
continue;
}
i = find_interface(sin6.sin6_scope_id);
if(i < 0) {
fprintf(stderr, "Received packet on unknown interface %d.\n",
sin6.sin6_scope_id);
nap(100);
continue;
}
handle_packet(sock, buf, rc, &interfaces[i], &sin6.sin6_addr);
}
gettime(&now);
if(selected_nexthop_metric < INFINITY) {
int n = find_neighbour(selected_interface, &selected_nexthop, 0);
assert(n >= 0);
if(neighbour_expired(n, &now)) {
/* Expire neighbour. */
flush_default_route();
delete_neighbour(n);
} else if(timeval_compare(&now, &selected_nexthop_timeout) > 0) {
/* Expire route. */
flush_default_route();
}
/* Send a request? */
}
/* Is it time to send hellos? */
if(timeval_minus_msec(&now, &last_hello) > hello_interval * 700) {
for(i = 0; i < numinterfaces; i++)
send_hello(sock, &interfaces[i]);
last_hello = now;
hello_count++;
/* Make an expiry pass every ten hellos. */
if(hello_count >= 10) {
expire_neighbours();
hello_count = 0;
}
}
/* Is it time to send an update? */
if(timeval_minus_msec(&now, &last_update) > update_interval * 700) {
for(i = 0; i < numinterfaces; i++)
send_update(sock, &interfaces[i], 0);
last_update = now;
}
}
/* Send a bunch of retractions. */
for(i = 0; i < numinterfaces; i++)
send_update(sock, &interfaces[i], 1);
flush_default_route();
return 0;
usage:
fprintf(stderr,
"Usage: sbabeld "
"[-p prefix] [-u interval] [-h interval] [-c cost] interface...\n");
return 1;
}
