/* * aim_im.c * * The routines for sending/receiving Instant Messages. * */ #include /* * Send an ICBM (instant message). * * * Possible flags: * AIM_IMFLAGS_AWAY -- Marks the message as an autoresponse * AIM_IMFLAGS_ACK -- Requests that the server send an ack * when the message is received (of type 0x0004/0x000c) * */ faim_export unsigned long aim_send_im(struct aim_session_t *sess, struct aim_conn_t *conn, char *destsn, u_int flags, char *msg) { int curbyte,i; struct command_tx_struct *newpacket; if (strlen(msg) >= MAXMSGLEN) return -1; if (!(newpacket = aim_tx_new(AIM_FRAMETYPE_OSCAR, 0x0002, conn, strlen(msg)+256))) return -1; newpacket->lock = 1; /* lock struct */ curbyte = 0; curbyte += aim_putsnac(newpacket->data+curbyte, 0x0004, 0x0006, 0x0000, sess->snac_nextid); /* * Generate a random message cookie * * We could cache these like we do SNAC IDs. (In fact, it * might be a good idea.) In the message error functions, * the 8byte message cookie is returned as well as the * SNAC ID. * */ for (i=0;i<8;i++) curbyte += aimutil_put8(newpacket->data+curbyte, (u_char) rand()); /* * Channel ID */ curbyte += aimutil_put16(newpacket->data+curbyte,0x0001); /* * Destination SN (prepended with byte length) */ curbyte += aimutil_put8(newpacket->data+curbyte,strlen(destsn)); curbyte += aimutil_putstr(newpacket->data+curbyte, destsn, strlen(destsn)); /* * metaTLV start. */ curbyte += aimutil_put16(newpacket->data+curbyte, 0x0002); curbyte += aimutil_put16(newpacket->data+curbyte, strlen(msg) + 0x10); /* * Flag data / ICBM Parameters? */ curbyte += aimutil_put8(newpacket->data+curbyte, 0x05); curbyte += aimutil_put8(newpacket->data+curbyte, 0x01); /* number of bytes to follow */ curbyte += aimutil_put16(newpacket->data+curbyte, 0x0004); curbyte += aimutil_put8(newpacket->data+curbyte, 0x01); curbyte += aimutil_put8(newpacket->data+curbyte, 0x01); curbyte += aimutil_put8(newpacket->data+curbyte, 0x01); curbyte += aimutil_put8(newpacket->data+curbyte, 0x02); curbyte += aimutil_put16(newpacket->data+curbyte, 0x0101); /* * Message block length. */ curbyte += aimutil_put16(newpacket->data+curbyte, strlen(msg) + 0x04); /* * Character set data? */ curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000); curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000); /* * Message. Not terminated. */ curbyte += aimutil_putstr(newpacket->data+curbyte,msg, strlen(msg)); /* * Set the Request Acknowledge flag. */ if (flags & AIM_IMFLAGS_ACK) { curbyte += aimutil_put16(newpacket->data+curbyte,0x0003); curbyte += aimutil_put16(newpacket->data+curbyte,0x0000); } /* * Set the Autoresponse flag. */ if (flags & AIM_IMFLAGS_AWAY) { curbyte += aimutil_put16(newpacket->data+curbyte,0x0004); curbyte += aimutil_put16(newpacket->data+curbyte,0x0000); } newpacket->commandlen = curbyte; newpacket->lock = 0; aim_tx_enqueue(sess, newpacket); aim_cachesnac(sess, 0x0004, 0x0006, 0x0000, destsn, strlen(destsn)+1); aim_cleansnacs(sess, 60); /* clean out all SNACs over 60sec old */ return sess->snac_nextid; } faim_internal int aim_parse_outgoing_im_middle(struct aim_session_t *sess, struct command_rx_struct *command) { unsigned int i = 0, z; rxcallback_t userfunc = NULL; unsigned char cookie[8]; int channel; struct aim_tlvlist_t *tlvlist; char sn[MAXSNLEN]; unsigned short icbmflags = 0; unsigned char flag1 = 0, flag2 = 0; unsigned char *msgblock = NULL, *msg = NULL; i = 10; /* ICBM Cookie. */ for (z=0; z<8; z++,i++) cookie[z] = command->data[i]; /* Channel ID */ channel = aimutil_get16(command->data+i); i += 2; if (channel != 0x01) { printf("faim: icbm: ICBM recieved on unsupported channel. Ignoring. (chan = %04x)\n", channel); return 1; } strncpy(sn, (char *) command->data+i+1, (int) *(command->data+i)); i += 1 + (int) *(command->data+i); tlvlist = aim_readtlvchain(command->data+i, command->commandlen-i); if (aim_gettlv(tlvlist, 0x0003, 1)) icbmflags |= AIM_IMFLAGS_ACK; if (aim_gettlv(tlvlist, 0x0004, 1)) icbmflags |= AIM_IMFLAGS_AWAY; if (aim_gettlv(tlvlist, 0x0002, 1)) { int j = 0; msgblock = (unsigned char *)aim_gettlv_str(tlvlist, 0x0002, 1); /* no, this really is correct. I'm not high or anything either. */ j += 2; j += 2 + aimutil_get16(msgblock+j); j += 2; j += 2; /* final block length */ flag1 = aimutil_get16(msgblock); j += 2; flag2 = aimutil_get16(msgblock); j += 2; msg = msgblock+j; } if ((userfunc = aim_callhandler(command->conn, 0x0004, 0x0006)) || (i = 0)) i = userfunc(sess, command, channel, sn, msg, icbmflags, flag1, flag2); if (msgblock) free(msgblock); aim_freetlvchain(&tlvlist); return 0; } /* * It can easily be said that parsing ICBMs is THE single * most difficult thing to do in the in AIM protocol. In * fact, I think I just did say that. * * Below is the best damned solution I've come up with * over the past sixteen months of battling with it. This * can parse both away and normal messages from every client * I have access to. Its not fast, its not clean. But it works. * * We should also support at least minimal parsing of * Channel 2, so that we can at least know the name of the * room we're invited to, but obviously can't attend... * */ faim_internal int aim_parse_incoming_im_middle(struct aim_session_t *sess, struct command_rx_struct *command) { u_int i = 0,z; rxcallback_t userfunc = NULL; u_char cookie[8]; int channel; struct aim_tlvlist_t *tlvlist; struct aim_userinfo_s userinfo; u_short wastebits; memset(&userinfo, 0x00, sizeof(struct aim_userinfo_s)); i = 10; /* Skip SNAC header */ /* * Read ICBM Cookie. And throw away. */ for (z=0; z<8; z++,i++) cookie[z] = command->data[i]; /* * Channel ID. * * Channel 0x0001 is the message channel. There are * other channels for things called "rendevous" * which represent chat and some of the other new * features of AIM2/3/3.5. * * Channel 0x0002 is the Rendevous channel, which * is where Chat Invitiations and various client-client * connection negotiations come from. * */ channel = aimutil_get16(command->data+i); i += 2; /* * */ if ((channel != 0x01) && (channel != 0x02)) { printf("faim: icbm: ICBM received on an unsupported channel. Ignoring.\n (chan = %04x)", channel); return 1; } /* * Extract the standard user info block. * * Note that although this contains TLVs that appear contiguous * with the TLVs read below, they are two different pieces. The * userinfo block contains the number of TLVs that contain user * information, the rest are not even though there is no seperation. * aim_extractuserinfo() returns the number of bytes used by the * userinfo tlvs, so you can start reading the rest of them right * afterward. * * That also means that TLV types can be duplicated between the * userinfo block and the rest of the message, however there should * never be two TLVs of the same type in one block. * */ i += aim_extractuserinfo(command->data+i, &userinfo); /* * Read block of TLVs (not including the userinfo data). All * further data is derived from what is parsed here. */ tlvlist = aim_readtlvchain(command->data+i, command->commandlen-i); /* * From here on, its depends on what channel we're on. */ if (channel == 1) { u_int j = 0, y = 0, z = 0; char *msg = NULL; u_int icbmflags = 0; struct aim_tlv_t *msgblocktlv; u_char *msgblock; u_short flag1,flag2; /* * Check Autoresponse status. If it is an autoresponse, * it will contain a type 0x0004 TLV, with zero length. */ if (aim_gettlv(tlvlist, 0x0004, 1)) icbmflags |= AIM_IMFLAGS_AWAY; /* * Check Ack Request status. */ if (aim_gettlv(tlvlist, 0x0003, 1)) icbmflags |= AIM_IMFLAGS_ACK; /* * Message block. */ msgblocktlv = aim_gettlv(tlvlist, 0x0002, 1); if (!msgblocktlv || !msgblocktlv->value) { printf("faim: icbm: major error! no message block TLV found!\n"); aim_freetlvchain(&tlvlist); return 1; } /* * Extracting the message from the unknown cruft. * * This is a bit messy, and I'm not really qualified, * even as the author, to comment on it. At least * its not as bad as a while loop shooting into infinity. * * "Do you believe in magic?" * */ msgblock = msgblocktlv->value; j = 0; wastebits = aimutil_get8(msgblock+j++); wastebits = aimutil_get8(msgblock+j++); y = aimutil_get16(msgblock+j); j += 2; for (z = 0; z < y; z++) wastebits = aimutil_get8(msgblock+j++); wastebits = aimutil_get8(msgblock+j++); wastebits = aimutil_get8(msgblock+j++); /* * Message string length, including flag words. */ i = aimutil_get16(msgblock+j); j += 2; /* * Flag words. * * Its rumored that these can kick in some funky * 16bit-wide char stuff that used to really kill * libfaim. Hopefully the latter is no longer true. * * Though someone should investiagte the former. * */ flag1 = aimutil_get16(msgblock+j); j += 2; flag2 = aimutil_get16(msgblock+j); j += 2; if (flag1 || flag2) printf("faim: icbm: **warning: encoding flags are being used! {%04x, %04x}\n", flag1, flag2); /* * Message string. */ i -= 4; msg = (char *)malloc(i+1); memcpy(msg, msgblock+j, i); msg[i] = '\0'; /* * Call client. */ userfunc = aim_callhandler(command->conn, 0x0004, 0x0007); if (userfunc) i = userfunc(sess, command, channel, &userinfo, msg, icbmflags, flag1, flag2); else i = 0; free(msg); } else if (channel == 0x0002) { struct aim_tlv_t *block1; struct aim_tlvlist_t *list2; unsigned short reqclass = 0; unsigned short status = 0; /* * There's another block of TLVs embedded in the type 5 here. */ block1 = aim_gettlv(tlvlist, 0x0005, 1); if (!block1) { printf("faim: no tlv 0x0005 in rendezvous transaction!\n"); aim_freetlvchain(&tlvlist); return 1; /* major problem */ } /* * First two bytes represent the status of the connection. * * 0 is a request, 2 is an accept */ status = aimutil_get16(block1->value+0); /* * Next comes the cookie. Should match the ICBM cookie. */ if (memcmp(block1->value+2, cookie, 8) != 0) printf("faim: rend: warning cookies don't match!\n"); /* * The next 16bytes are a capability block so we can * identify what type of rendezvous this is. * * Thanks to Eric Warmenhoven (of GAIM) * for pointing some of this out to me. In fact, a lot of * the client-to-client info comes from the work of the GAIM * developers. Thanks! * * Read off one capability string and we should have it ID'd. * */ reqclass = aim_getcap(block1->value+2+8, 0x10); if (reqclass == 0x0000) { printf("faim: rend: no ID block\n"); aim_freetlvchain(&tlvlist); return 1; } /* * What follows may be TLVs or nothing, depending on the * purpose of the message. * * Ack packets for instance have nothing more to them. */ list2 = aim_readtlvchain(block1->value+2+8+16, block1->length-2-8-16); if (!list2 || ((reqclass != AIM_CAPS_IMIMAGE) && !(aim_gettlv(list2, 0x2711, 1)))) { struct aim_msgcookie_t *cook; int type; type = aim_msgcookie_gettype(reqclass); /* XXX: fix this shitty code */ if ((cook = aim_uncachecookie(sess, cookie, type)) == NULL) { printf("faim: non-data rendezvous thats not in cache!\n"); aim_freetlvchain(&list2); aim_freetlvchain(&tlvlist); return 1; } if (cook->type == AIM_CAPS_SENDFILE) { struct aim_filetransfer_priv *ft; if (cook->data) { int errorcode = -1; /* XXX shouldnt this be 0? */ ft = (struct aim_filetransfer_priv *)cook->data; if (aim_gettlv(list2, 0x000b, 1)) errorcode = aim_gettlv16(list2, 0x000b, 1); if (errorcode) { printf("faim: transfer from %s (%s) for %s cancelled (error code %d)\n", ft->sn, ft->ip, ft->fh.name, errorcode); } else if (status == 0x0002) { /* connection accepted */ printf("faim: transfer from %s (%s) for %s accepted\n", ft->sn, ft->ip, ft->fh.name); } free(cook->data); } else { printf("faim: not data attached to file transfer\n"); } } else if (cook->type == AIM_CAPS_VOICE) { printf("faim: voice request cancelled\n"); } else { printf("faim: unknown cookie cache type %d\n", cook->type); } free(cook); if (list2) aim_freetlvchain(&list2); aim_freetlvchain(&tlvlist); return 1; } /* * The rest of the handling depends on what type it is. */ if (reqclass & AIM_CAPS_BUDDYICON) { /* * Call client. */ #if 0 userfunc = aim_callhandler(command->conn, 0x0004, 0x0007); if (userfunc || (i = 0)) i = userfunc(sess, command, channel, reqclass, &userinfo, ip, cookie); #endif } else if (reqclass & AIM_CAPS_VOICE) { struct aim_msgcookie_t *cachedcook; printf("faim: rend: voice!\n"); if(!(cachedcook = (struct aim_msgcookie_t*)calloc(1, sizeof(struct aim_msgcookie_t)))) return 1; memcpy(cachedcook->cookie, cookie, 8); cachedcook->type = AIM_COOKIETYPE_OFTVOICE; cachedcook->data = NULL; if (aim_cachecookie(sess, cachedcook) != 0) printf("faim: ERROR caching message cookie\n"); /* XXX: implement all this */ /* * Call client. */ userfunc = aim_callhandler(command->conn, 0x0004, 0x0007); if (userfunc || (i = 0)) { i = userfunc(sess, command, channel, reqclass, &userinfo); } } else if ((reqclass & AIM_CAPS_IMIMAGE) || (reqclass & AIM_CAPS_BUDDYICON)) { char ip[30]; struct aim_directim_priv *priv; memset(ip, 0, 30); if (aim_gettlv(list2, 0x0003, 1) && aim_gettlv(list2, 0x0005, 1)) { struct aim_tlv_t *iptlv, *porttlv; iptlv = aim_gettlv(list2, 0x0003, 1); porttlv = aim_gettlv(list2, 0x0005, 1); snprintf(ip, 30, "%d.%d.%d.%d:%d", aimutil_get8(iptlv->value+0), aimutil_get8(iptlv->value+1), aimutil_get8(iptlv->value+2), aimutil_get8(iptlv->value+3), 4443 /*aimutil_get16(porttlv->value)*/); } printf("faim: rend: directIM request from %s (%s)\n", userinfo.sn, ip); /* XXX: there are a couple of different request packets for * different things */ priv = (struct aim_directim_priv *)calloc(1, sizeof(struct aim_directim_priv)); memcpy(priv->ip, ip, sizeof(priv->ip)); memcpy(priv->sn, userinfo.sn, sizeof(priv->sn)); memcpy(priv->cookie, cookie, sizeof(priv->cookie)); /* * Call client. */ userfunc = aim_callhandler(command->conn, 0x0004, 0x0007); if (userfunc || (i = 0)) i = userfunc(sess, command, channel, reqclass, &userinfo, priv); } else if (reqclass & AIM_CAPS_CHAT) { struct aim_tlv_t *miscinfo; struct aim_chat_roominfo roominfo; char *msg=NULL,*encoding=NULL,*lang=NULL; miscinfo = aim_gettlv(list2, 0x2711, 1); aim_chat_readroominfo(miscinfo->value, &roominfo); if (aim_gettlv(list2, 0x000c, 1)) msg = aim_gettlv_str(list2, 0x000c, 1); if (aim_gettlv(list2, 0x000d, 1)) encoding = aim_gettlv_str(list2, 0x000d, 1); if (aim_gettlv(list2, 0x000e, 1)) lang = aim_gettlv_str(list2, 0x000e, 1); /* * Call client. */ userfunc = aim_callhandler(command->conn, 0x0004, 0x0007); if (userfunc || (i = 0)) i = userfunc(sess, command, channel, reqclass, &userinfo, &roominfo, msg, encoding?encoding+1:NULL, lang?lang+1:NULL); free(roominfo.name); free(msg); free(encoding); free(lang); } else if (reqclass & AIM_CAPS_GETFILE) { char ip[30]; struct aim_msgcookie_t *cachedcook; struct aim_tlv_t *miscinfo; if (!(cachedcook = calloc(1, sizeof(struct aim_msgcookie_t)))) return 0; memset(ip, 0, 30); if (!(miscinfo = aim_gettlv(list2, 0x2711, 1))) { free(cachedcook); return 0; } if (aim_gettlv(list2, 0x0003, 1) && aim_gettlv(list2, 0x0005, 1)) { struct aim_tlv_t *iptlv, *porttlv; if (!(iptlv = aim_gettlv(list2, 0x0003, 1)) || !(porttlv = aim_gettlv(list2, 0x0005, 1))) { free(cachedcook); return 0; } snprintf(ip, 30, "%d.%d.%d.%d:%d", aimutil_get8(iptlv->value+0), aimutil_get8(iptlv->value+1), aimutil_get8(iptlv->value+2), aimutil_get8(iptlv->value+3), aimutil_get16(porttlv->value)); } printf("faim: rend: file get request from %s (%s)\n", userinfo.sn, ip); /* * Call client. */ userfunc = aim_callhandler(command->conn, 0x0004, 0x0007); if (userfunc || (i = 0)) i = userfunc(sess, command, channel, reqclass, &userinfo, ip, cookie); } else if (reqclass & AIM_CAPS_SENDFILE) { #if 0 char ip[30]; char *desc = NULL; struct aim_msgcookie_t *cachedcook; struct aim_filetransfer_priv *ft; struct aim_tlv_t *miscinfo; memset(ip, 0, sizeof(ip)); if (!(miscinfo = aim_gettlv(list2, 0x2711, 1))) return 0; if (aim_gettlv(list2, 0x0003, 1) && aim_gettlv(list2, 0x0003, 1)) { struct aim_tlv_t *iptlv, *porttlv; iptlv = aim_gettlv(list2, 0x0003, 1); porttlv = aim_gettlv(list2, 0x0005, 1); snprintf(ip, sizeof(ip)-1, "%d.%d.%d.%d:%d", aimutil_get8(iptlv->value+0), aimutil_get8(iptlv->value+1), aimutil_get8(iptlv->value+2), aimutil_get8(iptlv->value+3), aimutil_get16(porttlv->value)); } if (aim_gettlv(list2, 0x000c, 1)) { desc = aim_gettlv_str(list2, 0x000c, 1); } printf("faim: rend: file transfer request from %s for %s: %s (%s)\n", userinfo.sn, miscinfo->value+8, desc, ip); memcpy(cachedcook->cookie, cookie, 8); ft = malloc(sizeof(struct aim_filetransfer_priv)); strncpy(ft->sn, userinfo.sn, sizeof(ft->sn)); strncpy(ft->ip, ip, sizeof(ft->ip)); strncpy(ft->fh.name, miscinfo->value+8, sizeof(ft->fh.name)); cachedcook->type = AIM_COOKIETYPE_OFTSEND; cachedcook->data = ft; if (aim_cachecookie(sess, cachedcook) != 0) printf("faim: ERROR caching message cookie\n"); aim_accepttransfer(sess, command->conn, ft->sn, cookie, AIM_CAPS_SENDFILE); if (desc) free(desc); #endif /* * Call client. */ userfunc = aim_callhandler(command->conn, 0x0004, 0x0007); if (userfunc || (i = 0)) i = userfunc(sess, command, channel, reqclass, &userinfo); } else { printf("faim: rend: unknown rendezvous 0x%04x\n", reqclass); } aim_freetlvchain(&list2); } /* * Free up the TLV chain. */ aim_freetlvchain(&tlvlist); return i; } /* * Possible codes: * AIM_TRANSFER_DENY_NOTSUPPORTED -- "client does not support" * AIM_TRANSFER_DENY_DECLINE -- "client has declined transfer" * AIM_TRANSFER_DENY_NOTACCEPTING -- "client is not accepting transfers" * */ faim_export unsigned long aim_denytransfer(struct aim_session_t *sess, struct aim_conn_t *conn, char *sender, char *cookie, unsigned short code) { struct command_tx_struct *newpacket; int curbyte, i; if(!(newpacket = aim_tx_new(AIM_FRAMETYPE_OSCAR, 0x0002, conn, 10+8+2+1+strlen(sender)+6))) return -1; newpacket->lock = 1; curbyte = aim_putsnac(newpacket->data, 0x0004, 0x000b, 0x0000, sess->snac_nextid); for (i = 0; i < 8; i++) curbyte += aimutil_put8(newpacket->data+curbyte, cookie[i]); curbyte += aimutil_put16(newpacket->data+curbyte, 0x0002); curbyte += aimutil_put8(newpacket->data+curbyte, strlen(sender)); curbyte += aimutil_putstr(newpacket->data+curbyte, sender, strlen(sender)); curbyte += aim_puttlv_16(newpacket->data+curbyte, 0x0003, code); newpacket->lock = 0; aim_tx_enqueue(sess, newpacket); return (sess->snac_nextid++); } /* * Not real sure what this does, nor does anyone I've talk to. * * Didn't use to send it. But now I think it might be a good * idea. * */ faim_export unsigned long aim_seticbmparam(struct aim_session_t *sess, struct aim_conn_t *conn) { struct command_tx_struct *newpacket; int curbyte; if(!(newpacket = aim_tx_new(AIM_FRAMETYPE_OSCAR, 0x0002, conn, 10+16))) return -1; newpacket->lock = 1; curbyte = aim_putsnac(newpacket->data, 0x0004, 0x0002, 0x0000, sess->snac_nextid); curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000); curbyte += aimutil_put32(newpacket->data+curbyte, 0x00000003); curbyte += aimutil_put8(newpacket->data+curbyte, 0x1f); curbyte += aimutil_put8(newpacket->data+curbyte, 0x40); curbyte += aimutil_put8(newpacket->data+curbyte, 0x03); curbyte += aimutil_put8(newpacket->data+curbyte, 0xe7); curbyte += aimutil_put8(newpacket->data+curbyte, 0x03); curbyte += aimutil_put8(newpacket->data+curbyte, 0xe7); curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000); curbyte += aimutil_put16(newpacket->data+curbyte, 0x0000); newpacket->lock = 0; aim_tx_enqueue(sess, newpacket); return (sess->snac_nextid++); } faim_internal int aim_parse_msgerror_middle(struct aim_session_t *sess, struct command_rx_struct *command) { u_long snacid = 0x000000000; struct aim_snac_t *snac = NULL; int ret = 0; rxcallback_t userfunc = NULL; char *dest; unsigned short reason = 0; /* * Get SNAC from packet and look it up * the list of unrepliedto/outstanding * SNACs. * * After its looked up, the SN that the * message should've gone to will be * in the ->data element of the snac struct. * */ snacid = aimutil_get32(command->data+6); snac = aim_remsnac(sess, snacid); if (!snac) { printf("faim: msgerr: got an ICBM-failed error on an unknown SNAC ID! (%08lx)\n", snacid); dest = NULL; } else dest = snac->data; reason = aimutil_get16(command->data+10); /* * Call client. */ userfunc = aim_callhandler(command->conn, 0x0004, 0x0001); if (userfunc) ret = userfunc(sess, command, dest, reason); else ret = 0; if (snac) { free(snac->data); free(snac); } return ret; } faim_internal int aim_parse_missedcall(struct aim_session_t *sess, struct command_rx_struct *command) { int i, ret = 1; rxcallback_t userfunc = NULL; unsigned short channel, nummissed, reason; struct aim_userinfo_s userinfo; i = 10; /* Skip SNAC header */ /* * XXX: supposedly, this entire packet can repeat as many times * as necessary. Should implement that. */ /* * Channel ID. */ channel = aimutil_get16(command->data+i); i += 2; /* * Extract the standard user info block. */ i += aim_extractuserinfo(command->data+i, &userinfo); nummissed = aimutil_get16(command->data+i); i += 2; reason = aimutil_get16(command->data+i); i += 2; /* * Call client. */ userfunc = aim_callhandler(command->conn, 0x0004, 0x000a); if (userfunc) ret = userfunc(sess, command, channel, &userinfo, nummissed, reason); else ret = 0; return ret; }