]> code.citadel.org Git - citadel.git/blobdiff - citadel/citserver.c
* Removed the session_count() function. Instead, keep a reference count
[citadel.git] / citadel / citserver.c
index 7bc73d1af1ef861b25ebf76f84385846b49dfe1b..1bc99652ccdf46ce1c9b03cf3a0bc994f3aecc22 100644 (file)
@@ -129,42 +129,52 @@ void RemoveContext (struct CitContext *con)
                return;
                }
 
-       lprintf(7, "Calling logout(%d)\n", con->cs_pid);
-       logout(con);
-
-       rec_log(CL_TERMINATE, con->curr_user);
-       unlink(con->temp);
-       lprintf(3, "citserver[%3d]: ended.\n", con->cs_pid);
-       
-       /* Run any cleanup routines registered by loadable modules */
-       PerformSessionHooks(EVT_STOP);
-
-       syslog(LOG_NOTICE,"session %d ended", con->cs_pid);
-       
-       /* Deallocate any user-data attached to this session */
-       deallocate_user_data(con);
-
-       /* delete context */
-
-       lprintf(7, "Removing context\n");
-
+       /* Remove the context from the global context list.  This needs
+        * to get done FIRST to avoid concurrency problems.  It is *vitally*
+        * important to keep num_sessions accurate!!
+        */
+       lprintf(7, "Removing context for session %d\n", con->cs_pid);
        begin_critical_section(S_SESSION_TABLE);
        if (ContextList == con) {
                ToFree = ContextList;
                ContextList = ContextList->next;
+               --num_sessions;
                }
        else {
                for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
                        if (ptr->next == con) {
                                ToFree = ptr->next;
                                ptr->next = ptr->next->next;
+                               --num_sessions;
                                }
                        }
                }
        end_critical_section(S_SESSION_TABLE);
 
-       lprintf(7, "Closing socket %d\n", ToFree->client_socket);
-       close(ToFree->client_socket);
+       if (ToFree == NULL) {
+               lprintf(9, "RemoveContext() found nothing to remove\n");
+               return;
+       }
+
+       /* Now handle all of the administrivia. */
+       lprintf(7, "Calling logout(%d)\n", con->cs_pid);
+       logout(con);
+
+       rec_log(CL_TERMINATE, con->curr_user);
+       unlink(con->temp);
+       lprintf(3, "citserver[%3d]: ended.\n", con->cs_pid);
+       
+       /* Run any cleanup routines registered by loadable modules */
+       PerformSessionHooks(EVT_STOP);
+
+       syslog(LOG_NOTICE,"session %d ended", con->cs_pid);
+       
+       /* Deallocate any user-data attached to this session */
+       deallocate_user_data(con);
+
+       /* If the client is still connected, blow 'em away. */
+       lprintf(7, "Closing socket %d\n", con->client_socket);
+       close(con->client_socket);
 
         /* Tell the housekeeping thread to check to see if this is the time
          * to initiate a scheduled shutdown event.
@@ -172,7 +182,7 @@ void RemoveContext (struct CitContext *con)
         enter_housekeeping_cmd("SCHED_SHUTDOWN");
 
        /* Free up the memory used by this context */
-       phree(ToFree);
+       phree(con);
 
        lprintf(7, "Done with RemoveContext()\n");
 }
@@ -268,14 +278,13 @@ void cmd_info(void) {
 
 void cmd_rchg(char *argbuf)
 {
-       char newroomname[ROOMNAMELEN];
+       char newroomname[256];
 
        extract(newroomname, argbuf, 0);
-       newroomname[ROOMNAMELEN] = 0;
+       newroomname[ROOMNAMELEN-1] = 0;
        if (strlen(newroomname) > 0) {
-               safestrncpy(CC->fake_roomname, newroomname, 
+               safestrncpy(CC->fake_roomname, newroomname,
                        sizeof(CC->fake_roomname) );
-               CC->fake_roomname[ROOMNAMELEN - 1] = 0;
                }
        else {
                strcpy(CC->fake_roomname, "");
@@ -283,41 +292,51 @@ void cmd_rchg(char *argbuf)
        cprintf("%d OK\n", OK);
 }
 
-void cmd_hchg(char *newhostname)
+void cmd_hchg(char *argbuf)
 {
-   if ((newhostname) && (newhostname[0]))
-   {
-      memset(CC->fake_hostname, 0, 25);
-      safestrncpy(CC->fake_hostname, newhostname, sizeof(CC->fake_hostname));
-   }
-   else
-      strcpy(CC->fake_hostname, "");
-   cprintf("%d OK\n",OK);
+       char newhostname[256];
+
+       extract(newhostname, argbuf, 0);
+       if (strlen(newhostname) > 0) {
+               safestrncpy(CC->fake_hostname, newhostname,
+                       sizeof(CC->fake_hostname) );
+               }
+       else {
+               strcpy(CC->fake_hostname, "");
+               }
+       cprintf("%d OK\n", OK);
 }
 
-void cmd_uchg(char *newusername)
+void cmd_uchg(char *argbuf)
 {
-   if (CC->usersupp.axlevel < 6) 
-   {
-      cprintf("%d You must be an Aide to use UCHG.\n",
-               ERROR+HIGHER_ACCESS_REQUIRED);
-      return;
-   }
-   if ((newusername) && (newusername[0]))
-   {
-      CC->cs_flags &= ~CS_STEALTH;
-      memset(CC->fake_username, 0, 32);
-      if (strncasecmp(newusername, CC->curr_user, strlen(CC->curr_user)))
-         safestrncpy(CC->fake_username, newusername, sizeof(CC->fake_username));
-   }
-   else
-   {
-      CC->fake_username[0] = '\0';
-      CC->cs_flags |= CS_STEALTH;
-   }
-   cprintf("%d\n",OK);
+
+       char newusername[256];
+
+       extract(newusername, argbuf, 0);
+
+       if (CC->usersupp.axlevel < 6) {
+               cprintf("%d You must be an Aide to masquerade your name.\n",
+                       ERROR+HIGHER_ACCESS_REQUIRED);
+               return;
+       }
+
+       if (strlen(newusername) > 0) {
+               CC->cs_flags &= ~CS_STEALTH;
+               memset(CC->fake_username, 0, 32);
+               if (strncasecmp(newusername, CC->curr_user,
+                               strlen(CC->curr_user)))
+                       safestrncpy(CC->fake_username, newusername,
+                               sizeof(CC->fake_username));
+       }
+       else {
+               CC->fake_username[0] = '\0';
+               CC->cs_flags |= CS_STEALTH;
+       }
+       cprintf("%d\n",OK);
 }
 
+
+
 /*
  * returns an asterisk if there are any express messages waiting,
  * space otherwise.
@@ -429,7 +448,7 @@ void cmd_iden(char *argbuf)
        safestrncpy(CC->cs_clientname, desc, sizeof CC->cs_clientname);
        CC->cs_clientname[31] = 0;
 
-       lprintf(9, "Looking up hostname\n");
+       lprintf(9, "Looking up hostname '%s'\n", from_host);
        if ((strlen(from_host)>0) && 
           (is_public_client(CC->cs_host))) {
                if (inet_aton(from_host, &addr))
@@ -831,7 +850,7 @@ void cmd_scdn(char *argbuf)
  */
 void begin_session(struct CitContext *con)
 {
-       int num_sessions, len;
+       int len;
        struct sockaddr_in sin;
 
        /* 
@@ -859,7 +878,6 @@ void begin_session(struct CitContext *con)
        con->dl_is_net = 0;
        con->FirstSessData = NULL;
 
-       num_sessions = session_count();
        con->nologin = 0;
        if ((config.c_maxsessions > 0)&&(num_sessions > config.c_maxsessions))
                con->nologin = 1;