Improve proxy server support

[tinc] / src / net_socket.c

diff --git a/src/net_socket.c b/src/net_socket.c
index 6439a74..5d72471 100644 (file)
--- a/src/net_socket.c
+++ b/src/net_socket.c
@@ -25,6 +25,7 @@
 #include "address_cache.h"
 #include "conf.h"
 #include "connection.h"
+#include "crypto.h"
 #include "list.h"
 #include "logger.h"
 #include "names.h"
@@ -46,7 +47,7 @@ int fwmark;
 
 listen_socket_t listen_socket[MAXSOCKETS];
 int listen_sockets;
-#ifndef HAVE_MINGW
+#ifndef HAVE_WINDOWS
 io_t unix_socket;
 #endif
 
@@ -175,9 +176,20 @@ static bool bind_to_address(connection_t *c) {
        return true;
 }
 
+static bool try_bind(int nfd, const sockaddr_t *sa, const char *type) {
+       if(!bind(nfd, &sa->sa, SALEN(sa->sa))) {
+               return true;
+       }
+
+       closesocket(nfd);
+       char *addrstr = sockaddr2hostname(sa);
+       logger(DEBUG_ALWAYS, LOG_ERR, "Can't bind to %s/%s: %s", addrstr, type, sockstrerror(sockerrno));
+       free(addrstr);
+       return false;
+}
+
 int setup_listen_socket(const sockaddr_t *sa) {
        int nfd;
-       char *addrstr;
        int option;
        char *iface;
 
@@ -236,11 +248,7 @@ int setup_listen_socket(const sockaddr_t *sa) {
 #endif
        }
 
-       if(bind(nfd, &sa->sa, SALEN(sa->sa))) {
-               closesocket(nfd);
-               addrstr = sockaddr2hostname(sa);
-               logger(DEBUG_ALWAYS, LOG_ERR, "Can't bind to %s/tcp: %s", addrstr, sockstrerror(sockerrno));
-               free(addrstr);
+       if(!try_bind(nfd, sa, "tcp")) {
                return -1;
        }
 
@@ -281,10 +289,8 @@ static void set_udp_buffer(int nfd, int type, const char *name, int size, bool w
        }
 }
 
-
 int setup_vpn_in_socket(const sockaddr_t *sa) {
        int nfd;
-       char *addrstr;
        int option;
 
        nfd = socket(sa->sa.sa_family, SOCK_DGRAM, IPPROTO_UDP);
@@ -385,11 +391,7 @@ int setup_vpn_in_socket(const sockaddr_t *sa) {
                return -1;
        }
 
-       if(bind(nfd, &sa->sa, SALEN(sa->sa))) {
-               closesocket(nfd);
-               addrstr = sockaddr2hostname(sa);
-               logger(DEBUG_ALWAYS, LOG_ERR, "Can't bind to %s/udp: %s", addrstr, sockstrerror(sockerrno));
-               free(addrstr);
+       if(!try_bind(nfd, sa, "udp")) {
                return -1;
        }
 
@@ -408,7 +410,7 @@ void retry_outgoing(outgoing_t *outgoing) {
        }
 
        timeout_add(&outgoing->ev, retry_outgoing_handler, outgoing, &(struct timeval) {
-               outgoing->timeout, rand() % 100000
+               outgoing->timeout, jitter()
        });
 
        logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Trying to re-establish outgoing connection in %d seconds", outgoing->timeout);
@@ -424,7 +426,7 @@ void finish_connecting(connection_t *c) {
 }
 
 static void do_outgoing_pipe(connection_t *c, const char *command) {
-#ifndef HAVE_MINGW
+#ifndef HAVE_WINDOWS
        int fd[2];
 
        if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
@@ -454,9 +456,12 @@ static void do_outgoing_pipe(connection_t *c, const char *command) {
        sockaddr2str(&c->address, &host, &port);
        setenv("REMOTEADDRESS", host, true);
        setenv("REMOTEPORT", port, true);
-       setenv("NODE", c->name, true);
        setenv("NAME", myself->name, true);
 
+       if(c->name) {
+               setenv("NODE", c->name, true);
+       }
+
        if(netname) {
                setenv("NETNAME", netname, true);
        }
@@ -646,12 +651,7 @@ begin:
        c->last_ping_time = time(NULL);
        c->status.connecting = true;
        c->name = xstrdup(outgoing->node->name);
-#ifndef DISABLE_LEGACY
-       c->outcipher = myself->connection->outcipher;
-       c->outdigest = myself->connection->outdigest;
-#endif
        c->outmaclength = myself->connection->outmaclength;
-       c->outcompression = myself->connection->outcompression;
        c->last_ping_time = now.tv_sec;
 
        connection_add(c);
@@ -759,12 +759,7 @@ void handle_new_meta_connection(void *data, int flags) {
 
        c = new_connection();
        c->name = xstrdup("<unknown>");
-#ifndef DISABLE_LEGACY
-       c->outcipher = myself->connection->outcipher;
-       c->outdigest = myself->connection->outdigest;
-#endif
        c->outmaclength = myself->connection->outmaclength;
-       c->outcompression = myself->connection->outcompression;
 
        c->address = sa;
        c->hostname = sockaddr2hostname(&sa);
@@ -782,7 +777,7 @@ void handle_new_meta_connection(void *data, int flags) {
        c->allow_request = ID;
 }
 
-#ifndef HAVE_MINGW
+#ifndef HAVE_WINDOWS
 /*
   accept a new UNIX socket connection
 */