+++ /dev/null
-/*
- * This module handles instant messaging between users.
- *
- * Copyright (c) 1987-2020 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 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.
- */
-
-#include "sysdep.h"
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <pwd.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <time.h>
-#include <sys/wait.h>
-#include <string.h>
-#include <limits.h>
-#include <libcitadel.h>
-#include "citadel.h"
-#include "server.h"
-#include "serv_instmsg.h"
-#include "citserver.h"
-#include "support.h"
-#include "config.h"
-#include "msgbase.h"
-#include "user_ops.h"
-#include "ctdl_module.h"
-
-struct imlog {
- struct imlog *next;
- long usernums[2];
- char usernames[2][128];
- time_t lastmsg;
- int last_serial;
- StrBuf *conversation;
-};
-
-struct imlog *imlist = NULL;
-
-/*
- * This function handles the logging of instant messages to disk.
- */
-void log_instant_message(struct CitContext *me, struct CitContext *them, char *msgtext, int serial_number)
-{
- long usernums[2];
- long t;
- struct imlog *iptr = NULL;
- struct imlog *this_im = NULL;
-
- memset(usernums, 0, sizeof usernums);
- usernums[0] = me->user.usernum;
- usernums[1] = them->user.usernum;
-
- /* Always put the lower user number first, so we can use the array as a hash value which
- * represents a pair of users. For a broadcast message one of the users will be 0.
- */
- if (usernums[0] > usernums[1]) {
- t = usernums[0];
- usernums[0] = usernums[1];
- usernums[1] = t;
- }
-
- begin_critical_section(S_IM_LOGS);
-
- /* Look for an existing conversation in the hash table.
- * If not found, create a new one.
- */
-
- this_im = NULL;
- for (iptr = imlist; iptr != NULL; iptr = iptr->next) {
- if ((iptr->usernums[0] == usernums[0]) && (iptr->usernums[1] == usernums[1])) {
- /* Existing conversation */
- this_im = iptr;
- }
- }
- if (this_im == NULL) {
- /* New conversation */
- this_im = malloc(sizeof(struct imlog));
- memset(this_im, 0, sizeof (struct imlog));
- this_im->usernums[0] = usernums[0];
- this_im->usernums[1] = usernums[1];
- /* usernames[] and usernums[] might not be in the same order. This is not an error. */
- if (me) {
- safestrncpy(this_im->usernames[0], me->user.fullname, sizeof this_im->usernames[0]);
- }
- if (them) {
- safestrncpy(this_im->usernames[1], them->user.fullname, sizeof this_im->usernames[1]);
- }
- this_im->conversation = NewStrBuf();
- this_im->next = imlist;
- imlist = this_im;
- StrBufAppendBufPlain(this_im->conversation, HKEY("<html><body>\r\n"), 0);
- }
-
- /* Since it's possible for this function to get called more than once if a user is logged
- * in on multiple sessions, we use the message's serial number to keep track of whether
- * we've already logged it.
- */
- if (this_im->last_serial != serial_number)
- {
- this_im->lastmsg = time(NULL); /* Touch the timestamp so we know when to flush */
- this_im->last_serial = serial_number;
- StrBufAppendBufPlain(this_im->conversation, HKEY("<p><b>"), 0);
- StrBufAppendBufPlain(this_im->conversation, me->user.fullname, -1, 0);
- StrBufAppendBufPlain(this_im->conversation, HKEY(":</b> "), 0);
- StrEscAppend(this_im->conversation, NULL, msgtext, 0, 0);
- StrBufAppendBufPlain(this_im->conversation, HKEY("</p>\r\n"), 0);
- }
- end_critical_section(S_IM_LOGS);
-}
-
-
-/*
- * Delete any remaining instant messages
- */
-void delete_instant_messages(void) {
- struct ExpressMessage *ptr;
-
- begin_critical_section(S_SESSION_TABLE);
- while (CC->FirstExpressMessage != NULL) {
- ptr = CC->FirstExpressMessage->next;
- if (CC->FirstExpressMessage->text != NULL)
- free(CC->FirstExpressMessage->text);
- free(CC->FirstExpressMessage);
- CC->FirstExpressMessage = ptr;
- }
- end_critical_section(S_SESSION_TABLE);
-}
-
-
-/*
- * Retrieve instant messages
- */
-void cmd_gexp(char *argbuf) {
- struct ExpressMessage *ptr;
-
- if (CC->FirstExpressMessage == NULL) {
- cprintf("%d No instant messages waiting.\n", ERROR + MESSAGE_NOT_FOUND);
- return;
- }
-
- begin_critical_section(S_SESSION_TABLE);
- ptr = CC->FirstExpressMessage;
- CC->FirstExpressMessage = CC->FirstExpressMessage->next;
- end_critical_section(S_SESSION_TABLE);
-
- cprintf("%d %d|%ld|%d|%s|%s|%s\n",
- LISTING_FOLLOWS,
- ((ptr->next != NULL) ? 1 : 0), /* more msgs? */
- (long)ptr->timestamp, /* time sent */
- ptr->flags, /* flags */
- ptr->sender, /* sender of msg */
- CtdlGetConfigStr("c_nodename"), /* static for now (and possibly deprecated) */
- ptr->sender_email /* email or jid of sender */
- );
-
- if (ptr->text != NULL) {
- memfmout(ptr->text, "\n");
- free(ptr->text);
- }
-
- cprintf("000\n");
- free(ptr);
-}
-
-
-/*
- * Asynchronously deliver instant messages
- */
-void cmd_gexp_async(void) {
-
- /* Only do this if the session can handle asynchronous protocol */
- if (CC->is_async == 0) return;
-
- /* And don't do it if there's nothing to send. */
- if (CC->FirstExpressMessage == NULL) return;
-
- cprintf("%d instant msg\n", ASYNC_MSG + ASYNC_GEXP);
-}
-
-
-/*
- * Back end support function for send_instant_message() and company
- */
-void add_xmsg_to_context(struct CitContext *ccptr, struct ExpressMessage *newmsg)
-{
- struct ExpressMessage *findend;
-
- if (ccptr->FirstExpressMessage == NULL) {
- ccptr->FirstExpressMessage = newmsg;
- }
- else {
- findend = ccptr->FirstExpressMessage;
- while (findend->next != NULL) {
- findend = findend->next;
- }
- findend->next = newmsg;
- }
-
- /* If the target context is a session which can handle asynchronous
- * messages, go ahead and set the flag for that.
- */
- set_async_waiting(ccptr);
-}
-
-
-/*
- * This is the back end to the instant message sending function.
- * Returns the number of users to which the message was sent.
- * Sending a zero-length message tests for recipients without sending messages.
- */
-int send_instant_message(char *lun, char *lem, char *x_user, char *x_msg)
-{
- int message_sent = 0; /* number of successful sends */
- struct CitContext *ccptr;
- struct ExpressMessage *newmsg = NULL;
- int do_send = 0; /* 1 = send message; 0 = only check for valid recipient */
- static int serial_number = 0; /* this keeps messages from getting logged twice */
-
- if (!IsEmptyStr(x_msg)) {
- do_send = 1;
- }
-
- /* find the target user's context and append the message */
- begin_critical_section(S_SESSION_TABLE);
- ++serial_number;
- for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
-
- if ( ((!strcasecmp(ccptr->user.fullname, x_user))
- || (!strcasecmp(x_user, "broadcast")))
- && (ccptr->can_receive_im)
- && ((ccptr->disable_exp == 0)
- || (CC->user.axlevel >= AxAideU)) ) {
- if (do_send) {
- newmsg = (struct ExpressMessage *) malloc(sizeof (struct ExpressMessage));
- memset(newmsg, 0, sizeof (struct ExpressMessage));
- time(&(newmsg->timestamp));
- safestrncpy(newmsg->sender, lun, sizeof newmsg->sender);
- safestrncpy(newmsg->sender_email, lem, sizeof newmsg->sender_email);
- if (!strcasecmp(x_user, "broadcast")) {
- newmsg->flags |= EM_BROADCAST;
- }
- newmsg->text = strdup(x_msg);
-
- add_xmsg_to_context(ccptr, newmsg);
-
- /* and log it ... */
- if (ccptr != CC) {
- log_instant_message(CC, ccptr, newmsg->text, serial_number);
- }
- }
- ++message_sent;
- }
- }
- end_critical_section(S_SESSION_TABLE);
- return (message_sent);
-}
-
-
-/*
- * send instant messages
- */
-void cmd_sexp(char *argbuf)
-{
- int message_sent = 0;
- char x_user[USERNAME_SIZE];
- char x_msg[1024];
- char *lem;
- char *x_big_msgbuf = NULL;
-
- if ((!(CC->logged_in)) && (!(CC->internal_pgm))) {
- cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
- return;
- }
-
- lem = CC->cs_principal_id;
-
- extract_token(x_user, argbuf, 0, '|', sizeof x_user);
- extract_token(x_msg, argbuf, 1, '|', sizeof x_msg);
-
- if (!x_user[0]) {
- cprintf("%d You were not previously paged.\n", ERROR + NO_SUCH_USER);
- return;
- }
- if ((!strcasecmp(x_user, "broadcast")) && (CC->user.axlevel < AxAideU)) {
- cprintf("%d Higher access required to send a broadcast.\n",
- ERROR + HIGHER_ACCESS_REQUIRED);
- return;
- }
- /* This loop handles text-transfer pages */
- if (!strcmp(x_msg, "-")) {
- message_sent = PerformXmsgHooks(CC->user.fullname, lem, x_user, "");
- if (message_sent == 0) {
- if (CtdlGetUser(NULL, x_user))
- cprintf("%d '%s' does not exist.\n",
- ERROR + NO_SUCH_USER, x_user);
- else
- cprintf("%d '%s' is not logged in "
- "or is not accepting pages.\n",
- ERROR + RESOURCE_NOT_OPEN, x_user);
- return;
- }
- unbuffer_output();
- cprintf("%d Transmit message (will deliver to %d users)\n",
- SEND_LISTING, message_sent);
- x_big_msgbuf = malloc(SIZ);
- memset(x_big_msgbuf, 0, SIZ);
- while (client_getln(x_msg, sizeof x_msg) >= 0 && strcmp(x_msg, "000")) {
- x_big_msgbuf = realloc(x_big_msgbuf,
- strlen(x_big_msgbuf) + strlen(x_msg) + 4);
- if (!IsEmptyStr(x_big_msgbuf))
- if (x_big_msgbuf[strlen(x_big_msgbuf)] != '\n')
- strcat(x_big_msgbuf, "\n");
- strcat(x_big_msgbuf, x_msg);
- }
- PerformXmsgHooks(CC->user.fullname, lem, x_user, x_big_msgbuf);
- free(x_big_msgbuf);
-
- /* This loop handles inline pages */
- } else {
- message_sent = PerformXmsgHooks(CC->user.fullname, lem, x_user, x_msg);
-
- if (message_sent > 0) {
- if (!IsEmptyStr(x_msg)) {
- cprintf("%d Message sent", CIT_OK);
- }
- else {
- cprintf("%d Ok to send message", CIT_OK);
- }
- if (message_sent > 1) {
- cprintf(" to %d users", message_sent);
- }
- cprintf(".\n");
- } else {
- if (CtdlGetUser(NULL, x_user)) {
- cprintf("%d '%s' does not exist.\n", ERROR + NO_SUCH_USER, x_user);
- }
- else {
- cprintf("%d '%s' is not logged in or is not accepting instant messages.\n",
- ERROR + RESOURCE_NOT_OPEN, x_user);
- }
- }
-
-
- }
-}
-
-
-/*
- * Enter or exit paging-disabled mode
- */
-void cmd_dexp(char *argbuf)
-{
- int new_state;
-
- if (CtdlAccessCheck(ac_logged_in)) return;
-
- new_state = extract_int(argbuf, 0);
- if ((new_state == 0) || (new_state == 1)) {
- CC->disable_exp = new_state;
- }
-
- cprintf("%d %d\n", CIT_OK, CC->disable_exp);
-}
-
-
-/*
- * Request client termination
- */
-void cmd_reqt(char *argbuf) {
- struct CitContext *ccptr;
- int sessions = 0;
- int which_session;
- struct ExpressMessage *newmsg;
-
- if (CtdlAccessCheck(ac_aide)) return;
- which_session = extract_int(argbuf, 0);
-
- begin_critical_section(S_SESSION_TABLE);
- for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
- if ((ccptr->cs_pid == which_session) || (which_session == 0)) {
-
- newmsg = (struct ExpressMessage *)
- malloc(sizeof (struct ExpressMessage));
- memset(newmsg, 0,
- sizeof (struct ExpressMessage));
- time(&(newmsg->timestamp));
- safestrncpy(newmsg->sender, CC->user.fullname,
- sizeof newmsg->sender);
- newmsg->flags |= EM_GO_AWAY;
- newmsg->text = strdup("Automatic logoff requested.");
-
- add_xmsg_to_context(ccptr, newmsg);
- ++sessions;
-
- }
- }
- end_critical_section(S_SESSION_TABLE);
- cprintf("%d Sent termination request to %d sessions.\n", CIT_OK, sessions);
-}
-
-
-/*
- * This is the back end for flush_conversations_to_disk()
- * At this point we've isolated a single conversation (struct imlog)
- * and are ready to write it to disk.
- */
-void flush_individual_conversation(struct imlog *im) {
- struct CtdlMessage *msg;
- long msgnum = 0;
- char roomname[ROOMNAMELEN];
- StrBuf *MsgBuf, *FullMsgBuf;
-
- StrBufAppendBufPlain(im->conversation, HKEY(
- "</body>\r\n"
- "</html>\r\n"
- ), 0
- );
-
- MsgBuf = StrBufRFC2047encodeMessage(im->conversation);
- FlushStrBuf(im->conversation);
- FullMsgBuf = NewStrBufPlain(NULL, StrLength(im->conversation) + 100);
-
- StrBufAppendBufPlain(FullMsgBuf, HKEY(
- "Content-type: text/html; charset=UTF-8\r\n"
- "Content-Transfer-Encoding: quoted-printable\r\n"
- "\r\n"
- ), 0
- );
- StrBufAppendBuf (FullMsgBuf, MsgBuf, 0);
- FreeStrBuf(&MsgBuf);
-
- msg = malloc(sizeof(struct CtdlMessage));
- memset(msg, 0, sizeof(struct CtdlMessage));
- msg->cm_magic = CTDLMESSAGE_MAGIC;
- msg->cm_anon_type = MES_NORMAL;
- msg->cm_format_type = FMT_RFC822;
- if (!IsEmptyStr(im->usernames[0])) {
- CM_SetField(msg, eAuthor, im->usernames[0], strlen(im->usernames[0]));
- } else {
- CM_SetField(msg, eAuthor, HKEY("Citadel"));
- }
- if (!IsEmptyStr(im->usernames[1])) {
- CM_SetField(msg, eRecipient, im->usernames[1], strlen(im->usernames[1]));
- }
-
- CM_SetField(msg, eOriginalRoom, HKEY(PAGELOGROOM));
- CM_SetAsFieldSB(msg, eMesageText, &FullMsgBuf); /* we own this memory now */
-
- /* Start with usernums[1] because it's guaranteed to be higher than usernums[0],
- * so if there's only one party, usernums[0] will be zero but usernums[1] won't.
- * Create the room if necessary. Note that we create as a type 5 room rather
- * than 4, which indicates that it's a personal room but we've already supplied
- * the namespace prefix.
- *
- * In the unlikely event that usernums[1] is zero, a room with an invalid namespace
- * prefix will be created. That's ok because the auto-purger will clean it up later.
- */
- snprintf(roomname, sizeof roomname, "%010ld.%s", im->usernums[1], PAGELOGROOM);
- CtdlCreateRoom(roomname, 5, "", 0, 1, 1, VIEW_BBS);
- msgnum = CtdlSubmitMsg(msg, NULL, roomname);
- CM_Free(msg);
-
- /* If there is a valid user number in usernums[0], save a copy for them too. */
- if (im->usernums[0] > 0) {
- snprintf(roomname, sizeof roomname, "%010ld.%s", im->usernums[0], PAGELOGROOM);
- CtdlCreateRoom(roomname, 5, "", 0, 1, 1, VIEW_BBS);
- CtdlSaveMsgPointerInRoom(roomname, msgnum, 0, NULL);
- }
-
- /* Finally, if we're logging instant messages globally, do that now. */
- if (!IsEmptyStr(CtdlGetConfigStr("c_logpages"))) {
- CtdlCreateRoom(CtdlGetConfigStr("c_logpages"), 3, "", 0, 1, 1, VIEW_BBS);
- CtdlSaveMsgPointerInRoom(CtdlGetConfigStr("c_logpages"), msgnum, 0, NULL);
- }
-
-}
-
-/*
- * Locate instant message conversations which have gone idle
- * (or, if the server is shutting down, locate *all* conversations)
- * and flush them to disk (in the participants' log rooms, etc.)
- */
-void flush_conversations_to_disk(time_t if_older_than) {
-
- struct imlog *flush_these = NULL;
- struct imlog *dont_flush_these = NULL;
- struct imlog *imptr = NULL;
- struct CitContext *nptr;
- int nContexts, i;
-
- nptr = CtdlGetContextArray(&nContexts) ; /* Make a copy of the current wholist */
-
- begin_critical_section(S_IM_LOGS);
- while (imlist)
- {
- imptr = imlist;
- imlist = imlist->next;
-
- /* For a two party conversation, if one party has logged out, force flush. */
- if (nptr) {
- int user0_is_still_online = 0;
- int user1_is_still_online = 0;
- for (i=0; i<nContexts; i++) {
- if (nptr[i].user.usernum == imptr->usernums[0]) ++user0_is_still_online;
- if (nptr[i].user.usernum == imptr->usernums[1]) ++user1_is_still_online;
- }
- if (imptr->usernums[0] != imptr->usernums[1]) { /* two party conversation */
- if ((!user0_is_still_online) || (!user1_is_still_online)) {
- imptr->lastmsg = 0L; /* force flush */
- }
- }
- else { /* one party conversation (yes, people do IM themselves) */
- if (!user0_is_still_online) {
- imptr->lastmsg = 0L; /* force flush */
- }
- }
- }
-
- /* Now test this conversation to see if it qualifies for flushing. */
- if ((time(NULL) - imptr->lastmsg) > if_older_than)
- {
- /* This conversation qualifies. Move it to the list of ones to flush. */
- imptr->next = flush_these;
- flush_these = imptr;
- }
- else {
- /* Move it to the list of ones not to flush. */
- imptr->next = dont_flush_these;
- dont_flush_these = imptr;
- }
- }
- imlist = dont_flush_these;
- end_critical_section(S_IM_LOGS);
- free(nptr);
-
- /* We are now outside of the critical section, and we are the only thread holding a
- * pointer to a linked list of conversations to be flushed to disk.
- */
- while (flush_these) {
-
- flush_individual_conversation(flush_these); /* This will free the string buffer */
- imptr = flush_these;
- flush_these = flush_these->next;
- free(imptr);
- }
-}
-
-
-
-void instmsg_timer(void) {
- flush_conversations_to_disk(300); /* Anything that hasn't peeped in more than 5 minutes */
-}
-
-void instmsg_shutdown(void) {
- flush_conversations_to_disk(0); /* Get it ALL onto disk NOW. */
-}
-
-CTDL_MODULE_INIT(instmsg)
-{
- if (!threading)
- {
- CtdlRegisterProtoHook(cmd_gexp, "GEXP", "Get instant messages");
- CtdlRegisterProtoHook(cmd_sexp, "SEXP", "Send an instant message");
- CtdlRegisterProtoHook(cmd_dexp, "DEXP", "Disable instant messages");
- CtdlRegisterProtoHook(cmd_reqt, "REQT", "Request client termination");
- CtdlRegisterSessionHook(cmd_gexp_async, EVT_ASYNC, PRIO_ASYNC + 1);
- CtdlRegisterSessionHook(delete_instant_messages, EVT_STOP, PRIO_STOP + 1);
- CtdlRegisterXmsgHook(send_instant_message, XMSG_PRI_LOCAL);
- CtdlRegisterSessionHook(instmsg_timer, EVT_TIMER, PRIO_CLEANUP + 400);
- CtdlRegisterSessionHook(instmsg_shutdown, EVT_SHUTDOWN, PRIO_SHUTDOWN + 10);
- }
-
- /* return our module name for the log */
- return "instmsg";
-}
projects / citadel.git / blobdiff