int seconds_till_retry = 5;
int udp_rcvbuf = 1024 * 1024;
int udp_sndbuf = 1024 * 1024;
+bool udp_rcvbuf_warnings;
+bool udp_sndbuf_warnings;
int max_connection_burst = 10;
int fwmark;
return nfd;
}
+static void set_udp_buffer(int nfd, int type, const char *name, int size, bool warnings) {
+ if(!size) {
+ return;
+ }
+
+ if(setsockopt(nfd, SOL_SOCKET, type, (void *)&size, sizeof(size))) {
+ logger(DEBUG_ALWAYS, LOG_WARNING, "Can't set UDP %s to %i: %s", name, size, sockstrerror(sockerrno));
+ return;
+ }
+
+ if(!warnings) {
+ return;
+ }
+
+ // The system may cap the requested buffer size.
+ // Read back the value and check if it is now as requested.
+ int actual = -1;
+ socklen_t optlen = sizeof(actual);
+
+ if(getsockopt(nfd, SOL_SOCKET, type, (void *)&actual, &optlen)) {
+ logger(DEBUG_ALWAYS, LOG_WARNING, "Can't read back UDP %s: %s", name, sockstrerror(sockerrno));
+ } else if(optlen != sizeof(actual)) {
+ logger(DEBUG_ALWAYS, LOG_WARNING, "Can't read back UDP %s: unexpected returned optlen %d", name, (int)optlen);
+ } else if(actual < size) {
+ logger(DEBUG_ALWAYS, LOG_WARNING, "Can't set UDP %s to %i, the system set it to %i instead", name, size, actual);
+ }
+}
+
+
int setup_vpn_in_socket(const sockaddr_t *sa) {
int nfd;
char *addrstr;
setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, (void *)&option, sizeof(option));
setsockopt(nfd, SOL_SOCKET, SO_BROADCAST, (void *)&option, sizeof(option));
- if(udp_rcvbuf && setsockopt(nfd, SOL_SOCKET, SO_RCVBUF, (void *)&udp_rcvbuf, sizeof(udp_rcvbuf))) {
- logger(DEBUG_ALWAYS, LOG_WARNING, "Can't set UDP SO_RCVBUF to %i: %s", udp_rcvbuf, sockstrerror(sockerrno));
- }
-
- if(udp_sndbuf && setsockopt(nfd, SOL_SOCKET, SO_SNDBUF, (void *)&udp_sndbuf, sizeof(udp_sndbuf))) {
- logger(DEBUG_ALWAYS, LOG_WARNING, "Can't set UDP SO_SNDBUF to %i: %s", udp_sndbuf, sockstrerror(sockerrno));
- }
+ set_udp_buffer(nfd, SO_RCVBUF, "SO_RCVBUF", udp_rcvbuf, udp_rcvbuf_warnings);
+ set_udp_buffer(nfd, SO_SNDBUF, "SO_SNDBUF", udp_sndbuf, udp_sndbuf_warnings);
#if defined(IPV6_V6ONLY)
int result;
begin:
- sa = get_recent_address(outgoing->address_cache);
+ sa = get_recent_address(outgoing->node->address_cache);
if(!sa) {
logger(DEBUG_CONNECTIONS, LOG_ERR, "Could not set up a meta connection to %s", outgoing->node->name);
node_t *n = outgoing->node;
+ if(!n->address_cache) {
+ n->address_cache = open_address_cache(n);
+ }
+
if(n->connection) {
logger(DEBUG_CONNECTIONS, LOG_INFO, "Already connected to %s", n->name);
}
}
- if(!outgoing->address_cache) {
- outgoing->address_cache = open_address_cache(n);
- }
-
do_outgoing_connection(outgoing);
return;
static void free_outgoing(outgoing_t *outgoing) {
timeout_del(&outgoing->ev);
-
- if(outgoing->address_cache) {
- close_address_cache(outgoing->address_cache);
- }
-
free(outgoing);
}
node_add(n);
}
+ free(name);
+
outgoing->node = n;
list_insert_tail(outgoing_list, outgoing);
setup_outgoing_connection(outgoing, true);