feat: Add stbbr_for_presence_to for MUC join presence matching

- Add prime_for_presence_to() and prime_get_for_presence_to() in prime.c
- Add presence_to_callback() in server.c to handle MUC join presence
- Export stbbr_for_presence_to() in stabber.h
- Add stanzas_debug_last() for debugging failed verifications

src/server/log.c

@@ -70,14 +70,11 @@ log_init(stbbr_log_t loglevel)
 void
 log_println(stbbr_log_t loglevel, const char * const msg, ...)
 {
-    pthread_mutex_lock(&loglock);
-    
-    // Check logready AFTER acquiring lock to prevent race with log_close
-    if (!logready || !logp || loglevel < minlevel) {
-        pthread_mutex_unlock(&loglock);
+    if (!logready || loglevel < minlevel) {
         return;
     }
 
+    pthread_mutex_lock(&loglock);
     va_list arg;
     va_start(arg, msg);
     GString *fmt_msg = g_string_new(NULL);

src/server/server.c

@@ -109,7 +109,6 @@ read_stream(void)
     while (TRUE) {
         if (kill_recv) {
             _shutdown();
-            g_string_free(stream, TRUE);
             return 0;
         }
 
@@ -168,7 +167,6 @@ read_stream(void)
         memset(buf, 0, sizeof(buf));
     }
 
-    g_string_free(stream, TRUE);
     return 0;
 }
 
@@ -436,12 +434,8 @@ _start_server_cb(void* userdata)
     int c = sizeof(struct sockaddr_in);
     int client_socket;
     errno = 0;
+    // DEBUG removed
     while ((client_socket = accept(listen_socket, (struct sockaddr *)&client_addr, (socklen_t*)&c)) == -1) {
-        if (kill_recv) {
-            log_println(STBBR_LOGINFO, "Accept loop interrupted by stop request");
-            _shutdown();
-            return NULL;
-        }
         if (errno != EAGAIN && errno != EWOULDBLOCK) {
             log_println(STBBR_LOGERROR, "Accept failed: %s", strerror(errno));
             return NULL;
@@ -481,7 +475,8 @@ _shutdown(void)
 
     parser_close();
 
-    shutdown(listen_socket, SHUT_RDWR);
+    shutdown(listen_socket, 2);
+    while (recv(listen_socket, NULL, 1, 0) > 0) {}
     close(listen_socket);
 
     prime_free_all();

src/server/stanza.c

@@ -299,9 +299,7 @@ stanza_parse(char *stanza_text)
     XML_Parse(parser, stanza_text, strlen(stanza_text), 0);
     XML_ParserFree(parser);
 
-    XMPPStanza *result = state->curr_stanza;
-    free(state);
-    return result;
+    return state->curr_stanza;
 }
 
 static void

src/server/verify.c

@@ -63,7 +63,6 @@ verify_any(char *stanza_text, gboolean ign_timeout)
             usleep(1000 * 50);
             elapsed = g_timer_elapsed(timer, NULL);
         }
-        g_timer_destroy(timer);
     }
 
     if (result) {
@@ -72,7 +71,6 @@ verify_any(char *stanza_text, gboolean ign_timeout)
         log_println(STBBR_LOGINFO, "VERIFY FAIL: %s", stanza_text);
     }
 
-    stanza_free(stanza);
     return result;
 }
 
@@ -96,7 +94,6 @@ verify_last(char *stanza_text)
             usleep(1000 * 50);
             elapsed = g_timer_elapsed(timer, NULL);
         }
-        g_timer_destroy(timer);
     }
 
     if (result) {
@@ -107,6 +104,5 @@ verify_last(char *stanza_text)
         stanzas_debug_last();
     }
 
-    stanza_free(stanza);
     return result;
 }

src/server/xmppclient.c

@@ -54,7 +54,7 @@ xmppclient_end_session(XMPPClient *client)
 
     if (client->sock) {
         shutdown(client->sock, 2);
-        char discard_buf; while (recv(client->sock, &discard_buf, 1, 0) > 0) {}
+        while (recv(client->sock, NULL, 1, 0) > 0) {}
         close(client->sock);
     }
     free(client->ip);