diff options
Diffstat (limited to 'irc_cap.c')
| -rw-r--r-- | irc_cap.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/irc_cap.c b/irc_cap.c new file mode 100644 index 00000000..3b139c94 --- /dev/null +++ b/irc_cap.c @@ -0,0 +1,180 @@ +/********************************************************************\ + * BitlBee -- An IRC to other IM-networks gateway * + * * + * Copyright 2002-2013 Wilmer van der Gaast and others * + \********************************************************************/ + +/* IRCv3 CAP command + * + * Specs: + * - v3.1: http://ircv3.net/specs/core/capability-negotiation-3.1.html + * - v3.2: http://ircv3.net/specs/core/capability-negotiation-3.2.html + * + * */ + +/* + 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 with + the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL; + if not, write to the Free Software Foundation, Inc., 51 Franklin St., + Fifth Floor, Boston, MA 02110-1301 USA +*/ + +#include "bitlbee.h" + +typedef struct { + char *name; + irc_cap_flag_t flag; +} cap_info_t; + +static const cap_info_t supported_caps[] = { + {"foo", CAP_FOO}, + {"bar", CAP_BAR}, + {NULL}, +}; + +static irc_cap_flag_t cap_flag_from_string(char *cap_name) +{ + int i; + + if (!cap_name || !cap_name[0]) { + return 0; + } + + if (cap_name[0] == '-') { + cap_name++; + } + + for (i = 0; supported_caps[i].name; i++) { + if (strcmp(supported_caps[i].name, cap_name) == 0) { + return supported_caps[i].flag; + } + } + return 0; +} + +static gboolean irc_cmd_cap_req(irc_t *irc, char *caps) +{ + int i; + char *lower = NULL; + char **split = NULL; + irc_cap_flag_t new_caps = irc->caps; + + if (!caps || !caps[0]) { + return FALSE; + } + + lower = g_ascii_strdown(caps, -1); + split = g_strsplit(lower, " ", -1); + g_free(lower); + + for (i = 0; split[i]; i++) { + gboolean remove; + irc_cap_flag_t flag; + + if (!split[i][0]) { + continue; /* skip empty items (consecutive spaces) */ + } + + remove = (split[i][0] == '-'); + flag = cap_flag_from_string(split[i]); + + if (!flag || (remove && !(irc->caps & flag))) { + /* unsupported cap, or removing something that isn't there */ + g_strfreev(split); + return FALSE; + } + + if (remove) { + new_caps &= ~flag; + } else { + new_caps |= flag; + } + } + + /* if we got here, set the new caps and ack */ + irc->caps = new_caps; + + g_strfreev(split); + return TRUE; +} + +/* version can be "302" or NULL, but we don't need cap-3.2 for anything yet */ +static void irc_cmd_cap_ls(irc_t *irc, char *version) +{ + int i; + GString *str = g_string_sized_new(256); + + for (i = 0; supported_caps[i].name; i++) { + if (i != 0) { + g_string_append_c(str, ' '); + } + g_string_append(str, supported_caps[i].name); + } + + irc_send_cap(irc, "LS", str->str); + + g_string_free(str, TRUE); +} + +/* this one looks suspiciously similar to cap ls, + * but cap-3.2 will make them very different */ +static void irc_cmd_cap_list(irc_t *irc) +{ + int i; + gboolean first = TRUE; + GString *str = g_string_sized_new(256); + + for (i = 0; supported_caps[i].name; i++) { + if (irc->caps & supported_caps[i].flag) { + if (!first) { + g_string_append_c(str, ' '); + } + first = FALSE; + + g_string_append(str, supported_caps[i].name); + } + } + + irc_send_cap(irc, "LIST", str->str); + + g_string_free(str, TRUE); +} + +void irc_cmd_cap(irc_t *irc, char **cmd) +{ + if (!(irc->status & USTATUS_LOGGED_IN)) { + /* Put registration on hold until CAP END */ + irc->status |= USTATUS_CAP_PENDING; + } + + if (g_strcasecmp(cmd[1], "LS") == 0) { + irc_cmd_cap_ls(irc, cmd[2]); + + } else if (g_strcasecmp(cmd[1], "LIST") == 0) { + irc_cmd_cap_list(irc); + + } else if (g_strcasecmp(cmd[1], "REQ") == 0) { + gboolean ack = irc_cmd_cap_req(irc, cmd[2]); + + irc_send_cap(irc, ack ? "ACK" : "NAK", cmd[2] ? : ""); + + } else if (g_strcasecmp(cmd[1], "END") == 0) { + irc->status &= ~USTATUS_CAP_PENDING; + irc_check_login(irc); + + } else { + irc_send_num(irc, 410, "%s :Invalid CAP command", cmd[1]); + } + +} + |