Protect precious strlens, as pointed out by John Goerzen
[citadel.git] / citadel / modules / network / serv_netspool.c
index a309a0b7c4a0f93d2eeb2c46a59192a29eb39e2f..300efacb39de8f36deda13386d839dd0e7019099 100644 (file)
@@ -2,15 +2,15 @@
  * This module handles shared rooms, inter-Citadel mail, and outbound
  * mailing list processing.
  *
- * Copyright (c) 2000-2012 by the citadel.org team
+ * Copyright (c) 2000-2015 by the citadel.org team
  *
- *  This program is open source software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License, version 3.
+ * This program is open source software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 3.
  *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
  * ** NOTE **   A word on the S_NETCONFIGS semaphore:
  * This is a fairly high-level type of critical section.  It ensures that no
@@ -72,7 +72,6 @@
 #include "internet_addressing.h"
 #include "serv_network.h"
 #include "clientsocket.h"
-#include "file_ops.h"
 #include "citadel_dirs.h"
 #include "threads.h"
 #include "context.h"
 #endif
 
 
+/*
+ * Bounce a message back to the sender
+ */
+void network_bounce(struct CtdlMessage **pMsg, char *reason)
+{
+       struct CitContext *CCC = CC;
+       char buf[SIZ];
+       char bouncesource[SIZ];
+       char recipient[SIZ];
+       recptypes *valid = NULL;
+       char force_room[ROOMNAMELEN];
+       static int serialnum = 0;
+       long len;
+       struct CtdlMessage *msg = *pMsg;
+       *pMsg = NULL;
+       QNM_syslog(LOG_DEBUG, "entering network_bounce()\n");
+
+       if (msg == NULL) return;
+
+       snprintf(bouncesource, sizeof bouncesource, "%s@%s", BOUNCESOURCE, CtdlGetConfigStr("c_nodename"));
+
+       /* 
+        * Give it a fresh message ID
+        */
+       len = snprintf(buf, sizeof(buf),
+                      "%ld.%04lx.%04x@%s",
+                      (long)time(NULL),
+                      (long)getpid(),
+                      ++serialnum,
+                      CtdlGetConfigStr("c_fqdn"));
+
+       CM_SetField(msg, emessageId, buf, len);
+
+       /*
+        * FIXME ... right now we're just sending a bounce; we really want to
+        * include the text of the bounced message.
+        */
+       if (!IsEmptyStr(reason)) {
+               CM_SetField(msg, eMesageText, reason, strlen(reason));
+       }
+       msg->cm_format_type = 0;
+
+       /*
+        * Turn the message around
+        */
+       CM_FlushField(msg, eRecipient);
+       CM_FlushField(msg, eDestination);
+
+       len = snprintf(recipient, sizeof(recipient), "%s@%s",
+                      msg->cm_fields[eAuthor],
+                      msg->cm_fields[eNodeName]);
+
+       CM_SetField(msg, eAuthor, HKEY(BOUNCESOURCE));
+       CM_SetField(msg, eNodeName, CtdlGetConfigStr("c_nodename"), strlen(CtdlGetConfigStr("c_nodename")));
+       CM_SetField(msg, eMsgSubject, HKEY("Delivery Status Notification (Failure)"));
+
+       Netmap_AddMe(msg, HKEY("unknown_user"));
+
+       /* Now submit the message */
+       valid = validate_recipients(recipient, NULL, 0);
+       if (valid != NULL) if (valid->num_error != 0) {
+               free_recipients(valid);
+               valid = NULL;
+       }
+       if ( (valid == NULL) || (!strcasecmp(recipient, bouncesource)) ) {
+               strcpy(force_room, CtdlGetConfigStr("c_aideroom"));
+       }
+       else {
+               strcpy(force_room, "");
+       }
+       if ( (valid == NULL) && IsEmptyStr(force_room) ) {
+               strcpy(force_room, CtdlGetConfigStr("c_aideroom"));
+       }
+       CtdlSubmitMsg(msg, valid, force_room, 0);
+
+       /* Clean up */
+       if (valid != NULL) free_recipients(valid);
+       CM_Free(msg);
+       QNM_syslog(LOG_DEBUG, "leaving network_bounce()\n");
+}
+
+
 void ParseLastSent(const CfgLineType *ThisOne, StrBuf *Line, const char *LinePos, OneRoomNetCfg *OneRNCFG)
 {
        RoomNetCfgLine *nptr;
@@ -169,10 +250,10 @@ void Netmap_AddMe(struct CtdlMessage *msg, const char *defl, long defllen)
        if (CM_IsEmpty(msg, eMessagePath)) {
                CM_SetField(msg, eMessagePath, defl, defllen);
        }
-       node_len = strlen(config.c_nodename);
+       node_len = strlen(CtdlGetConfigStr("c_nodename"));
        if (node_len >= SIZ) 
                node_len = SIZ - 1;
-       memcpy(buf, config.c_nodename, node_len);
+       memcpy(buf, CtdlGetConfigStr("c_nodename"), node_len);
        buf[node_len] = '!';
        buf[node_len + 1] = '\0';
        CM_PrependToField(msg, eMessagePath, buf, node_len + 1);
@@ -183,6 +264,7 @@ void InspectQueuedRoom(SpoolControl **pSC,
                       HashList *working_ignetcfg,
                       HashList *the_netmap)
 {
+       struct CitContext *CCC = CC;
        SpoolControl *sc;
        int i = 0;
 
@@ -205,16 +287,18 @@ void InspectQueuedRoom(SpoolControl **pSC,
        }
        if (sc->room.QRhighest <= sc->lastsent)
        {
-               syslog(LOG_DEBUG, "nothing to do for <%s>\n", room_to_spool->name);
+               QN_syslog(LOG_DEBUG, "nothing to do for <%s>\n", room_to_spool->name);
                free(sc);
                return;
        }
 
+       begin_critical_section(S_NETCONFIGS);
        if (sc->RNCfg == NULL)
                sc->RNCfg = CtdlGetNetCfgForRoom(sc->room.QRnumber);
 
        if (!HaveSpoolConfig(sc->RNCfg))
        {
+               end_critical_section(S_NETCONFIGS);
                free(sc);
                /* nothing to do for this room... */
                return;
@@ -232,6 +316,7 @@ void InspectQueuedRoom(SpoolControl **pSC,
        
        if (StrLength(sc->RNCfg->Sender) > 0)
                sc->Users[roommailalias] = NewStrBufDup(sc->RNCfg->Sender);
+       end_critical_section(S_NETCONFIGS);
 
        sc->next = *pSC;
        *pSC = sc;
@@ -304,7 +389,7 @@ void CalcListID(SpoolControl *sc)
                StrBufAppendBufPlain(sc->ListID, HKEY("room_"), 0);
                StrBufAppendBuf(sc->ListID, RoomName, 0);
                StrBufAppendBufPlain(sc->ListID, HKEY("."), 0);
-               StrBufAppendBufPlain(sc->ListID, config.c_fqdn, -1, 0);
+               StrBufAppendBufPlain(sc->ListID, CtdlGetConfigStr("c_fqdn"), -1, 0);
                /*
                 * this used to be:
                 * roomname <Room-Number.list-id.fqdn>
@@ -322,7 +407,7 @@ void CalcListID(SpoolControl *sc)
                StrBufAppendBufPlain(sc->Users[roommailalias], HKEY("room_"), 0);
                StrBufAppendBuf(sc->Users[roommailalias], RoomName, 0);
                StrBufAppendBufPlain(sc->Users[roommailalias], HKEY("@"), 0);
-               StrBufAppendBufPlain(sc->Users[roommailalias], config.c_fqdn, -1, 0);
+               StrBufAppendBufPlain(sc->Users[roommailalias], CtdlGetConfigStr("c_fqdn"), -1, 0);
 
                StrBufLowerCase(sc->Users[roommailalias]);
        }
@@ -330,6 +415,7 @@ void CalcListID(SpoolControl *sc)
        FreeStrBuf(&RoomName);
 }
 
+static time_t last_digest_delivery = 0;
 
 /*
  * Batch up and send all outbound traffic from the current room
@@ -350,22 +436,15 @@ void network_spoolout_room(SpoolControl *sc)
 
        syslog(LOG_INFO, "Networking started for <%s>\n", CCC->room.QRname);
 
-       /* If there are digest recipients, we have to build a digest */
-       if (sc->Users[digestrecp] != NULL) {
-               sc->digestfp = tmpfile();
-               fprintf(sc->digestfp, "Content-type: text/plain\n\n");
-       }
-
        CalcListID(sc);
 
        /* remember where we started... */
        lastsent = sc->lastsent;
 
-       /* Do something useful */
+       /* Fetch the messages we ought to send & prepare them. */
        CtdlForEachMessage(MSGS_GT, sc->lastsent, NULL, NULL, NULL,
                network_spool_msg, sc);
 
-       /* If we wrote a digest, deliver it and then close it */
        if (StrLength(sc->Users[roommailalias]) > 0)
        {
                long len;
@@ -378,37 +457,112 @@ void network_spoolout_room(SpoolControl *sc)
        else
        {
                snprintf(buf, sizeof buf, "room_%s@%s",
-                        CCC->room.QRname, config.c_fqdn);
+                        CCC->room.QRname, CtdlGetConfigStr("c_fqdn"));
        }
 
        for (i=0; buf[i]; ++i) {
                buf[i] = tolower(buf[i]);
                if (isspace(buf[i])) buf[i] = '_';
        }
+
+
+       /* If we wrote a digest, deliver it and then close it */
+       if (sc->Users[digestrecp] != NULL) {
+               time_t now = time(NULL);
+               time_t secs_today = now % (24 * 60 * 60);
+               long delta = 0;
+
+               if (last_digest_delivery != 0) {
+                       delta = now - last_digest_delivery;
+                       delta = (24 * 60 * 60) - delta;
+               }
+
+               if ((secs_today < 300) && 
+                   (delta < 300))
+               {
+                       if (sc->digestfp == NULL) {
+                               sc->digestfp = create_digest_file(&sc->room, 0);
+                       }
+                       if (sc->digestfp != NULL) {
+                               last_digest_delivery = now;
+                               fprintf(sc->digestfp,
+                                       " -----------------------------------"
+                                       "------------------------------------"
+                                       "-------\n"
+                                       "You are subscribed to the '%s' "
+                                       "list.\n"
+                                       "To post to the list: %s\n",
+                                       CCC->room.QRname, buf
+                                       );
+                               network_deliver_digest(sc);     /* deliver */
+                               remove_digest_file(&sc->room);
+                       }
+               }
+       }
        if (sc->digestfp != NULL) {
-               fprintf(sc->digestfp,
-                       " -----------------------------------"
-                       "------------------------------------"
-                       "-------\n"
-                       "You are subscribed to the '%s' "
-                       "list.\n"
-                       "To post to the list: %s\n",
-                       CCC->room.QRname, buf
-               );
-               network_deliver_digest(sc);     /* deliver and close */
+               fclose(sc->digestfp);
+               sc->digestfp = NULL;
        }
 
        /* Now rewrite the config file */
        if (sc->lastsent != lastsent)
        {
+               begin_critical_section(S_NETCONFIGS);
                sc->RNCfg = CtdlGetNetCfgForRoom(sc->room.QRnumber);
 
                sc->RNCfg->lastsent = sc->lastsent;
                sc->RNCfg->changed = 1;
+               end_critical_section(S_NETCONFIGS);
        }
-       end_critical_section(S_NETCONFIGS);
 }
 
+
+/*
+ * Check the use table.  This is a list of messages which have recently
+ * arrived on the system.  It is maintained and queried to prevent the same
+ * message from being entered into the database multiple times if it happens
+ * to arrive multiple times by accident.
+ */
+int network_usetable(struct CtdlMessage *msg)
+{
+       StrBuf *msgid;
+       struct CitContext *CCC = CC;
+       time_t now;
+
+       /* Bail out if we can't generate a message ID */
+       if ((msg == NULL) || CM_IsEmpty(msg, emessageId))
+       {
+               return(0);
+       }
+
+       /* Generate the message ID */
+       msgid = NewStrBufPlain(CM_KEY(msg, emessageId));
+       if (haschar(ChrPtr(msgid), '@') == 0) {
+               StrBufAppendBufPlain(msgid, HKEY("@"), 0);
+               if (!CM_IsEmpty(msg, eNodeName)) {
+                       StrBufAppendBufPlain(msgid, CM_KEY(msg, eNodeName), 0);
+               }
+               else {
+                       FreeStrBuf(&msgid);
+                       return(0);
+               }
+       }
+       now = time(NULL);
+       if (CheckIfAlreadySeen("Networker Import",
+                              msgid,
+                              now, 0,
+                              eUpdate,
+                              CCC->cs_pid, 0) != 0)
+       {
+               FreeStrBuf(&msgid);
+               return(1);
+       }
+       FreeStrBuf(&msgid);
+
+       return(0);
+}
+
+
 /*
  * Process a buffer containing a single message from a single file
  * from the inbound queue 
@@ -421,7 +575,7 @@ void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg,
        struct CtdlMessage *msg = NULL;
        long pos;
        int field;
-       struct recptypes *recp = NULL;
+       recptypes *recp = NULL;
        char target_room[ROOMNAMELEN];
        struct ser_ret sermsg;
        char filename[PATH_MAX];
@@ -460,10 +614,10 @@ void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg,
 
        /* Check for message routing */
        if (!CM_IsEmpty(msg, eDestination)) {
-               if (strcasecmp(msg->cm_fields[eDestination], config.c_nodename)) {
+               if (strcasecmp(msg->cm_fields[eDestination], CtdlGetConfigStr("c_nodename"))) {
 
                        /* route the message */
-                       Buf = NewStrBufPlain(msg->cm_fields[eDestination], -1);
+                       Buf = NewStrBufPlain(CM_KEY(msg,eDestination));
                        if (CtdlIsValidNode(&nexthop, 
                                            NULL, 
                                            Buf, 
@@ -473,7 +627,7 @@ void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg,
                                Netmap_AddMe(msg, HKEY("unknown_user"));
 
                                /* serialize the message */
-                               serialize_message(&sermsg, msg);
+                               CtdlSerializeMessage(&sermsg, msg);
 
                                /* now send it */
                                if (StrLength(nexthop) == 0) {
@@ -505,10 +659,9 @@ void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg,
                        else {  /* invalid destination node name */
                                FreeStrBuf(&Buf);
 
-                               network_bounce(msg,
+                               network_bounce(&msg,
 "A message you sent could not be delivered due to an invalid destination node"
 " name.  Please check the address and try sending the message again.\n");
-                               msg = NULL;
                                return;
 
                        }
@@ -545,10 +698,9 @@ void network_process_buffer(char *buffer, long size, HashList *working_ignetcfg,
        else if (!CM_IsEmpty(msg, eRecipient)) {
                recp = validate_recipients(msg->cm_fields[eRecipient], NULL, 0);
                if (recp != NULL) if (recp->num_error != 0) {
-                       network_bounce(msg,
+                       network_bounce(&msg,
                                "A message you sent could not be delivered due to an invalid address.\n"
                                "Please check the address and try sending the message again.\n");
-                       msg = NULL;
                        free_recipients(recp);
                        QNM_syslog(LOG_DEBUG, "Bouncing message due to invalid recipient address.\n");
                        return;
@@ -624,7 +776,7 @@ void network_process_file(char *filename,
        long msgend = (-1L);
        long msgcur = 0L;
        int ch;
-
+       int nMessages = 0;
 
        fp = fopen(filename, "rb");
        if (fp == NULL) {
@@ -653,6 +805,7 @@ void network_process_file(char *filename,
                }
 
                ++msgcur;
+               nMessages ++;
        }
 
        msgend = msgcur - 1;
@@ -663,8 +816,15 @@ void network_process_file(char *filename,
                                        working_ignetcfg,
                                        the_netmap,
                                        netmap_changed);
+               nMessages ++;
        }
 
+       if (nMessages > 0)
+               QN_syslog(LOG_INFO,
+                         "network: processed %d messages in %s\n",
+                         nMessages,
+                         filename);
+
        fclose(fp);
        unlink(filename);
 }
@@ -713,7 +873,7 @@ void network_do_spoolin(HashList *working_ignetcfg, HashList *the_netmap, int *n
               (filedir_entry != NULL))
        {
 #ifdef _DIRENT_HAVE_D_NAMLEN
-               d_namelen = filedir_entry->d_namelen;
+               d_namelen = filedir_entry->d_namlen;
 
 #else
                d_namelen = strlen(filedir_entry->d_name);
@@ -817,7 +977,7 @@ void network_consolidate_spoolout(HashList *working_ignetcfg, HashList *the_netm
               (filedir_entry != NULL))
        {
 #ifdef _DIRENT_HAVE_D_NAMLEN
-               d_namelen = filedir_entry->d_namelen;
+               d_namelen = filedir_entry->d_namlen;
 
 #else
                d_namelen = strlen(filedir_entry->d_name);
@@ -971,7 +1131,7 @@ void network_consolidate_spoolout(HashList *working_ignetcfg, HashList *the_netm
               (filedir_entry != NULL))
        {
 #ifdef _DIRENT_HAVE_D_NAMLEN
-               d_namelen = filedir_entry->d_namelen;
+               d_namelen = filedir_entry->d_namlen;
 
 #else
                d_namelen = strlen(filedir_entry->d_name);