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/* X-Chat
 * Copyright (C) 1998 Peter Zelezny.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */

#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <glib.h>
#include <glib/gprintf.h>

#include "xchat.h"
#include "xchatc.h"
#include "modes.h"
#include "s
generated by cgit-pink 1.4.1 (git 2.36.1) at 2025-03-18 19:33:53 +0000
util.h" #include "inbound.h" #ifdef HAVE_STRINGS_H #include <strings.h> #endif typedef struct { server *serv; char *op; char *deop; char *voice; char *devoice; } mode_run; static int is_prefix_char (server * serv, char c); static void record_chan_mode (session *sess, char sign, char mode, char *arg); static char *mode_cat (char *str, char *addition); static void handle_single_mode (mode_run *mr, char sign, char mode, char *nick, char *chan, char *arg, int quiet, int is_324); static int mode_has_arg (server *serv, char sign, char mode); static void mode_print_grouped (session *sess, char *nick, mode_run *mr); static int mode_chanmode_type (server * serv, char mode); /* word[] - list of nicks. wpos - index into word[]. Where nicks really start. end - index into word[]. Last entry plus one. sign - a char, e.g. '+' or '-' mode - a mode, e.g. 'o' or 'v' */ void send_channel_modes (session *sess, char *tbuf, char *word[], int wpos, int end, char sign, char mode, int modes_per_line) { int usable_modes, orig_len, len, wlen, i, max; server *serv = sess->server; /* sanity check. IRC RFC says three per line. */ if (serv->modes_per_line < 3) serv->modes_per_line = 3; if (modes_per_line < 1) modes_per_line = serv->modes_per_line; /* RFC max, minus length of "MODE %s " and "\r\n" and 1 +/- sign */ /* 512 - 6 - 2 - 1 - strlen(chan) */ max = 503 - strlen (sess->channel); while (wpos < end) { tbuf[0] = '\0'; orig_len = len = 0; /* we'll need this many modechars too */ len += modes_per_line; /* how many can we fit? */ for (i = 0; i < modes_per_line; i++) { /* no more nicks left? */ if (wpos + i >= end) break; wlen = strlen (word[wpos + i]) + 1; if (wlen + len > max) break; len += wlen; /* length of our whole string so far */ } if (i < 1) return; usable_modes = i; /* this is how many we'll send on this line */ /* add the +/-modemodemodemode */ len = orig_len; tbuf[len] = sign; len++; for (i = 0; i < usable_modes; i++) { tbuf[len] = mode; len++; } tbuf[len] = 0; /* null terminate for the strcat() to work */ /* add all the nicknames */ for (i = 0; i < usable_modes; i++) { strcat (tbuf, " "); strcat (tbuf, word[wpos + i]); } serv->p_mode (serv, sess->channel, tbuf); wpos += usable_modes; } } /* does 'chan' have a valid prefix? e.g. # or & */ int is_channel (server * serv, char *chan) { if (strchr (serv->chantypes, chan[0])) return 1; return 0; } /* is the given char a valid nick mode char? e.g. @ or + */ static int is_prefix_char (server * serv, char c) { int pos = 0; char *np = serv->nick_prefixes; while (np[0]) { if (np[0] == c) return pos; pos++; np++; } if (serv->bad_prefix) { if (strchr (serv->bad_nick_prefixes, c)) /* valid prefix char, but mode unknown */ return -2; } return -1; } /* returns '@' for ops etc... */ char get_nick_prefix (server * serv, unsigned int access) { int pos; char c; for (pos = 0; pos < USERACCESS_SIZE; pos++) { c = serv->nick_prefixes[pos]; if (c == 0) break; if (access & (1 << pos)) return c; } return 0; } /* returns the access bitfield for a nickname. E.g. @nick would return 000010 in binary %nick would return 000100 in binary +nick would return 001000 in binary */ unsigned int nick_access (server * serv, char *nick, int *modechars) { int i; unsigned int access = 0; char *orig = nick; while (*nick) { i = is_prefix_char (serv, *nick); if (i == -1) break; /* -2 == valid prefix char, but mode unknown */ if (i != -2) access |= (1 << i); nick++; } *modechars = nick - orig; return access; } /* returns the access number for a particular mode. e.g. mode 'a' returns 0 mode 'o' returns 1 mode 'h' returns 2 mode 'v' returns 3 Also puts the nick-prefix-char in 'prefix' */ int mode_access (server * serv, char mode, char *prefix) { int pos = 0; while (serv->nick_modes[pos]) { if (serv->nick_modes[pos] == mode) { *prefix = serv->nick_prefixes[pos]; return pos; } pos++; } *prefix = 0; return -1; } static void record_chan_mode (session *sess, char sign, char mode, char *arg) { /* Somebody needed to acutally update sess->current_modes, needed to play nice with bouncers, and less mode calls. Also keeps modes up to date for scripts */ server *serv = sess->server; GString *current = g_string_new(sess->current_modes); gint mode_pos = -1; gchar *current_char = current->str; gint modes_length; gint argument_num = 0; gint argument_offset = 0; gint argument_length = 0; int i = 0; gchar *arguments_start; /* find out if the mode currently exists */ arguments_start = g_strstr_len(current->str , -1, " "); if (arguments_start) { modes_length = arguments_start - current->str; } else { modes_length = current->len; /* set this to the end of the modes */ arguments_start = current->str + current->len; } while (mode_pos == -1 && i < modes_length) { if (*current_char == mode) { mode_pos = i; } else { i++; current_char++; } } /* if the mode currently exists and has an arg, need to know where * (including leading space) */ if (mode_pos != -1 && mode_has_arg(serv, '+', mode)) { current_char = current->str; i = 0; while (i <= mode_pos) { if (mode_has_arg(serv, '+', *current_char)) argument_num++; current_char++; i++; } /* check through arguments for where to start */ current_char = arguments_start; i = 0; while (i < argument_num && *current_char != '\0') { if (*current_char == ' ') i++; if (i != argument_num) current_char++; } argument_offset = current_char - current->str; /* how long the existing argument is for this key * important for malloc and strncpy */ if (i == argument_num) { argument_length++; current_char++; while (*current_char != '\0' && *current_char != ' ') { argument_length++; current_char++; } } } /* two cases, adding and removing a mode, handled differently */ if (sign == '+') { if (mode_pos != -1) { /* if it already exists, only need to do something (change) * if there should be a param */ if (mode_has_arg(serv, sign, mode)) { /* leave the old space there */ current = g_string_erase(current, argument_offset+1, argument_length-1); current = g_string_insert(current, argument_offset+1, arg); free(sess->current_modes); sess->current_modes = g_string_free(current, FALSE); } } /* mode wasn't there before */ else { /* insert the new mode character */ current = g_string_insert_c(current, modes_length, mode); /* add the argument, with space if there is one */ if (mode_has_arg(serv, sign, mode)) { current = g_string_append_c(current, ' '); current = g_string_append(current, arg); } free(sess->current_modes); sess->current_modes = g_string_free(current, FALSE); } } else if (sign == '-' && mode_pos != -1) { /* remove the argument first if it has one*/ if (mode_has_arg(serv, '+', mode)) current = g_string_erase(current, argument_offset, argument_length); /* remove the mode character */ current = g_string_erase(current, mode_pos, 1); free(sess->current_modes); sess->current_modes = g_string_free(current, FALSE); } } static char * mode_cat (char *str, char *addition) { int len; if (str) { len = strlen (str) + strlen (addition) + 2; str = realloc (str, len); strcat (str, " "); strcat (str, addition); } else { str = strdup (addition); } return str; } /* handle one mode, e.g. handle_single_mode (mr,'+','b',"elite","#warez","banneduser",) */ static void handle_single_mode (mode_run *mr, char sign, char mode, char *nick, char *chan, char *arg, int quiet, int is_324) { session *sess; server *serv = mr->serv; char outbuf[4]; outbuf[0] = sign; outbuf[1] = 0; outbuf[2] = mode; outbuf[3] = 0; sess = find_channel (serv, chan); if (!sess || !is_channel (serv, chan)) { /* got modes for a chan we're not in! probably nickmode +isw etc */ sess = serv->front_session; goto genmode; } /* is this a nick mode? */ if (strchr (serv->nick_modes, mode)) { /* update the user in the userlist */ userlist_update_mode (sess, /*nickname */ arg, mode, sign); } else { if (!is_324 && !sess->ignore_mode && mode_chanmode_type(serv, mode) >= 1) record_chan_mode (sess, sign, mode, arg); } switch (sign) { case '+': switch (mode) { case 'k': safe_strcpy (sess->channelkey, arg, sizeof (sess->channelkey)); fe_update_channel_key (sess); fe_update_mode_buttons (sess, mode, sign); if (!quiet) EMIT_SIGNAL (XP_TE_CHANSETKEY, sess, nick, arg, NULL, NULL, 0); return; case 'l': sess->limit = atoi (arg); fe_update_channel_limit (sess); fe_update_mode_buttons (sess, mode, sign); if (!quiet) EMIT_SIGNAL (XP_TE_CHANSETLIMIT, sess, nick, arg, NULL, NULL, 0); return; case 'o': if (!quiet) mr->op = mode_cat (mr->op, arg); return; case 'h': if (!quiet) EMIT_SIGNAL (XP_TE_CHANHOP, sess, nick, arg, NULL, NULL, 0); return; case 'v': if (!quiet) mr->voice = mode_cat (mr->voice, arg); return; case 'b': if (!quiet) EMIT_SIGNAL (XP_TE_CHANBAN, sess, nick, arg, NULL, NULL, 0); return; case 'e': if (!quiet) EMIT_SIGNAL (XP_TE_CHANEXEMPT, sess, nick, arg, NULL, NULL, 0); return; case 'I': if (!quiet) EMIT_SIGNAL (XP_TE_CHANINVITE, sess, nick, arg, NULL, NULL, 0); return; } break; case '-': switch (mode) { case 'k': sess->channelkey[0] = 0; fe_update_channel_key (sess); fe_update_mode_buttons (sess, mode, sign); if (!quiet) EMIT_SIGNAL (XP_TE_CHANRMKEY, sess, nick, NULL, NULL, NULL, 0); return; case 'l': sess->limit = 0; fe_update_channel_limit (sess); fe_update_mode_buttons (sess, mode, sign); if (!quiet) EMIT_SIGNAL (XP_TE_CHANRMLIMIT, sess, nick, NULL, NULL, NULL, 0); return; case 'o': if (!quiet) mr->deop = mode_cat (mr->deop, arg); return; case 'h': if (!quiet) EMIT_SIGNAL (XP_TE_CHANDEHOP, sess, nick, arg, NULL, NULL, 0); return; case 'v': if (!quiet) mr->devoice = mode_cat (mr->devoice, arg); return; case 'b': if (!quiet) EMIT_SIGNAL (XP_TE_CHANUNBAN, sess, nick, arg, NULL, NULL, 0); return; case 'e': if (!quiet) EMIT_SIGNAL (XP_TE_CHANRMEXEMPT, sess, nick, arg, NULL, NULL, 0); return; case 'I': if (!quiet) EMIT_SIGNAL (XP_TE_CHANRMINVITE, sess, nick, arg, NULL, NULL, 0); return; } } fe_update_mode_buttons (sess, mode, sign); genmode: /* Received umode +e. If we're waiting to send JOIN then send now! */ if (mode == 'e' && sign == '+' && !serv->p_cmp (chan, serv->nick)) inbound_identified (serv); if (!quiet) { if (*arg) { char *buf = malloc (strlen (chan) + strlen (arg) + 2); sprintf (buf, "%s %s", chan, arg); EMIT_SIGNAL (XP_TE_CHANMODEGEN, sess, nick, outbuf, outbuf + 2, buf, 0); free (buf); } else EMIT_SIGNAL (XP_TE_CHANMODEGEN, sess, nick, outbuf, outbuf + 2, chan, 0); } } /* does this mode have an arg? like +b +l +o */ static int mode_has_arg (server * serv, char sign, char mode) { int type; /* if it's a nickmode, it must have an arg */ if (strchr (serv->nick_modes, mode)) return 1; type = mode_chanmode_type (serv, mode); switch (type) { case 0: /* type A */ case 1: /* type B */ return 1; case 2: /* type C */ if (sign == '+') return 1; case 3: /* type D */ return 0; default: return 0; } } /* what type of chanmode is it? -1 for not in chanmode */ static int mode_chanmode_type (server * serv, char mode) { /* see what numeric 005 CHANMODES=xxx said */ char *cm = serv->chanmodes; int type = 0; int found = 0; while (*cm && !found) { if (*cm == ',') { type++; } else if (*cm == mode) { found = 1; } cm++; } if (found) return type; /* not found? -1 */ else return -1; } static void mode_print_grouped (session *sess, char *nick, mode_run *mr) { /* print all the grouped Op/Deops */ if (mr->op) { EMIT_SIGNAL (XP_TE_CHANOP, sess, nick, mr->op, NULL, NULL, 0); free (mr->op); mr->op = NULL; } if (mr->deop) { EMIT_SIGNAL (XP_TE_CHANDEOP, sess, nick, mr->deop, NULL, NULL, 0); free (mr->deop); mr->deop = NULL; } if (mr->voice) { EMIT_SIGNAL (XP_TE_CHANVOICE, sess, nick, mr->voice, NULL, NULL, 0); free (mr->voice); mr->voice = NULL; } if (mr->devoice) { EMIT_SIGNAL (XP_TE_CHANDEVOICE, sess, nick, mr->devoice, NULL, NULL, 0); free (mr->devoice); mr->devoice = NULL; } } /* handle a MODE or numeric 324 from server */ void handle_mode (server * serv, char *word[], char *word_eol[], char *nick, int numeric_324) { session *sess; char *chan; char *modes; char *argstr; char sign; int len; int arg; int i, num_args; int num_modes; int offset = 3; int all_modes_have_args = FALSE; int using_front_tab = FALSE; mode_run mr; mr.serv = serv; mr.op = mr.deop = mr.voice = mr.devoice = NULL; /* numeric 324 has everything 1 word later (as opposed to MODE) */ if (numeric_324) offset++; chan = word[offset]; modes = word[offset + 1]; if (*modes == ':') modes++; if (*modes == 0) return; /* beyondirc's blank modes */ sess = find_channel (serv, chan); if (!sess) { sess = serv->front_session; using_front_tab = TRUE; } /* remove trailing space */ len = strlen (word_eol[offset]) - 1; if (word_eol[offset][len] == ' ') word_eol[offset][len] = 0; if (prefs.raw_modes && !numeric_324) EMIT_SIGNAL (XP_TE_RAWMODES, sess, nick, word_eol[offset], 0, 0, 0); if (numeric_324 && !using_front_tab) { if (sess->current_modes) free (sess->current_modes); sess->current_modes = strdup (word_eol[offset+1]); } sign = *modes; modes++; arg = 1; /* count the number of arguments (e.g. after the -o+v) */ num_args = 0; i = 1; while ((i + offset + 1) < PDIWORDS) { i++; if (!(*word[i + offset])) break; num_args++; } /* count the number of modes (without the -/+ chars */ num_modes = 0; i = 0; while (i < strlen (modes)) { if (modes[i] != '+' && modes[i] != '-') num_modes++; i++; } if (num_args == num_modes) all_modes_have_args = TRUE; while (*modes) { switch (*modes) { case '-': case '+': /* print all the grouped Op/Deops */ mode_print_grouped (sess, nick, &mr); sign = *modes; break; default: argstr = ""; if ((all_modes_have_args || mode_has_arg (serv, sign, *modes)) && arg < (num_args+1)) { arg++; argstr = word[arg + offset]; } handle_single_mode (&mr, sign, *modes, nick, chan, argstr, numeric_324 || prefs.raw_modes, numeric_324); } modes++; } /* update the title at the end, now that the mode update is internal now */ if (!using_front_tab) fe_set_title (sess); /* print all the grouped Op/Deops */ mode_print_grouped (sess, nick, &mr); } /* handle the 005 numeric */ void inbound_005 (server * serv, char *word[]) { int w; char *pre; w = 4; /* start at the 4th word */ while (w < PDIWORDS && *word[w]) { if (strncmp (word[w], "MODES=", 6) == 0) { serv->modes_per_line = atoi (word[w] + 6); } else if (strncmp (word[w], "CHANTYPES=", 10) == 0) { free (serv->chantypes); serv->chantypes = strdup (word[w] + 10); } else if (strncmp (word[w], "CHANMODES=", 10) == 0) { free (serv->chanmodes); serv->chanmodes = strdup (word[w] + 10); } else if (strncmp (word[w], "PREFIX=", 7) == 0) { pre = strchr (word[w] + 7, ')'); if (pre) { pre[0] = 0; /* NULL out the ')' */ free (serv->nick_prefixes); free (serv->nick_modes); serv->nick_prefixes = strdup (pre + 1); serv->nick_modes = strdup (word[w] + 8); } else { /* bad! some ircds don't give us the modes. */ /* in this case, we use it only to strip /NAMES */ serv->bad_prefix = TRUE; if (serv->bad_nick_prefixes) free (serv->bad_nick_prefixes); serv->bad_nick_prefixes = strdup (word[w] + 7); } } else if (strncmp (word[w], "WATCH=", 6) == 0) { serv->supports_watch = TRUE; } else if (strncmp (word[w], "NETWORK=", 8) == 0) { /* if (serv->networkname) free (serv->networkname); serv->networkname = strdup (word[w] + 8);*/ if (serv->server_session->type == SESS_SERVER) { safe_strcpy (serv->server_session->channel, word[w] + 8, CHANLEN); fe_set_channel (serv->server_session); } /* use /NICKSERV */ if (strcasecmp (word[w] + 8, "RusNet") == 0) serv->nickservtype = 1; else if (strcasecmp (word[w] + 8, "UniBG") == 0) serv->nickservtype = 3; else if (strcasecmp (word[w] + 8, "QuakeNet") == 0) serv->nickservtype = 4; } else if (strncmp (word[w], "CASEMAPPING=", 12) == 0) { if (strcmp (word[w] + 12, "ascii") == 0) /* bahamut */ serv->p_cmp = (void *)strcasecmp; } else if (strncmp (word[w], "CHARSET=", 8) == 0) { if (strcasecmp (word[w] + 8, "UTF-8") == 0) { server_set_encoding (serv, "UTF-8"); } } else if (strcmp (word[w], "NAMESX") == 0) { /* 12345678901234567 */ tcp_send_len (serv, "PROTOCTL NAMESX\r\n", 17); } else if (strcmp (word[w], "WHOX") == 0) { serv->have_whox = TRUE; } else if (strcmp (word[w], "CAPAB") == 0) { serv->have_capab = TRUE; /* 12345678901234567890 */ tcp_send_len (serv, "CAPAB IDENTIFY-MSG\r\n", 20); /* now wait for numeric 290 */ } else if (strcmp (word[w], "EXCEPTS") == 0) { #ifndef WIN32 serv->have_except = TRUE; #endif } else if (strncmp (word[w], "ELIST=", 6) == 0) { /* supports LIST >< min/max user counts? */ if (strchr (word[w] + 6, 'U') || strchr (word[w] + 6, 'u')) serv->use_listargs = TRUE; } w++; } }