chan_sip: Don't send trailing \0 on keep alive packets

This is a partial fix for ASTERISK~25817 but does not address the
comments regarding RFC 5626.

Change-Id: I227e2d10c0035bbfa1c6e46ae2318fd1122d8420

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index b8cc7bf76518b6c77a657d28090c45ed8e55cdf2..64327285893eac842bfb2b3ba7c610b441bf1bb4 100644 (file)
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -30068,6 +30068,7 @@ static int sip_send_keepalive(const void *data)
        struct sip_peer *peer = (struct sip_peer*) data;
        int res = 0;
        const char keepalive[] = "\r\n";
+       size_t count = sizeof(keepalive) - 1;
 
        peer->keepalivesend = -1;
 
@@ -30078,13 +30079,13 @@ static int sip_send_keepalive(const void *data)
 
        /* Send the packet out using the proper method for this peer */
        if ((peer->socket.fd != -1) && (peer->socket.type == AST_TRANSPORT_UDP)) {
-               res = ast_sendto(peer->socket.fd, keepalive, sizeof(keepalive), 0, &peer->addr);
+               res = ast_sendto(peer->socket.fd, keepalive, count, 0, &peer->addr);
        } else if ((peer->socket.type & (AST_TRANSPORT_TCP | AST_TRANSPORT_TLS)) &&
                   (peer->socket.tcptls_session) &&
                   (peer->socket.tcptls_session->fd != -1)) {
-               res = sip_tcptls_write(peer->socket.tcptls_session, keepalive, sizeof(keepalive));
+               res = sip_tcptls_write(peer->socket.tcptls_session, keepalive, count);
        } else if (peer->socket.type == AST_TRANSPORT_UDP) {
-               res = ast_sendto(sipsock, keepalive, sizeof(keepalive), 0, &peer->addr);
+               res = ast_sendto(sipsock, keepalive, count, 0, &peer->addr);
        }
 
        if (res == -1) {
@@ -30098,7 +30099,7 @@ static int sip_send_keepalive(const void *data)
                }
        }
 
-       if (res != sizeof(keepalive)) {
+       if (res != count) {
                ast_log(LOG_WARNING, "sip_send_keepalive to %s returned %d: %s\n", ast_sockaddr_stringify(&peer->addr), res, strerror(errno));
        }