149 lines
3.8 KiB
C
149 lines
3.8 KiB
C
/*
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* http.c: IRC service detection plugin
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*
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* Copyright (c) 2014, Přemysl Janouch <p.janouch@gmail.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#define LIBERTY_WANT_PROTO_IRC
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#include "config.h"
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#include "../liberty/liberty.c"
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#include "../plugin-api.h"
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// --- Selected IRC stuff ------------------------------------------------------
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#define IRC_MAX_NICKNAME 9 ///< The limit from RFC 2812
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#define IRC_RPL_WELCOME 1
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#define IRC_RPL_MYINFO 4
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// --- Service detection -------------------------------------------------------
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static struct plugin_data
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{
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void *ctx; ///< Application context
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struct plugin_api *api; ///< Plugin API vtable
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}
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g_data;
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struct scan_data
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{
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struct str input; ///< Input buffer
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struct unit *u; ///< Scan unit
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};
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static void *
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scan_init (struct service *service, struct unit *u)
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{
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(void) service;
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char nick[IRC_MAX_NICKNAME + 1];
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size_t i;
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for (i = 0; i < sizeof nick - 1; i++)
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nick[i] = 'a' + rand () % ('z' - 'a' + 1);
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nick[i] = '\0';
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struct str hello;
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str_init (&hello);
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str_append_printf (&hello,
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"NICK %s\r\nUSER %s 8 * :%s\r\n", nick, nick, nick);
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g_data.api->unit_write (u, hello.str, hello.len);
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str_free (&hello);
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struct scan_data *scan = xcalloc (1, sizeof *scan);
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str_init (&scan->input);
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scan->u = u;
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return scan;
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}
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static void
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scan_free (void *handle)
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{
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struct scan_data *scan = handle;
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str_free (&scan->input);
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free (scan);
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}
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static void
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on_irc_message (const struct irc_message *msg, const char *raw, void *user_data)
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{
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(void) raw;
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struct scan_data *scan = user_data;
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unsigned long code;
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if (!irc_strcmp (msg->command, "PING"))
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{
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// Without this we might be unable to finish registration
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struct str pong;
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str_init (&pong);
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str_append_printf (&pong, "PONG :%s\r\n",
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msg->params.len > 0 ? msg->params.vector[0] : "");
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g_data.api->unit_write (scan->u, pong.str, pong.len);
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}
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else if (strlen (msg->command) == 3 && xstrtoul (&code, msg->command, 10))
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{
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// It looks like we've successfully registered
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if (msg->prefix && code == IRC_RPL_WELCOME)
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g_data.api->unit_set_success (scan->u, true);
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// Extract the server name at least
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if (code == IRC_RPL_MYINFO && msg->params.len > 0)
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{
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char *info = xstrdup_printf ("%s: %s",
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"server name", msg->params.vector[1]);
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g_data.api->unit_add_info (scan->u, info);
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free (info);
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g_data.api->unit_stop (scan->u);
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}
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}
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}
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static void
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on_data (void *handle, const void *data, size_t len)
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{
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struct scan_data *scan = handle;
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str_append_data (&scan->input, data, len);
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irc_process_buffer (&scan->input, on_irc_message, scan);
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}
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static struct service g_irc_service =
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{
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.name = "IRC",
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.flags = SERVICE_SUPPORTS_TLS,
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.scan_init = scan_init,
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.scan_free = scan_free,
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.on_data = on_data,
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.on_eof = NULL,
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.on_error = NULL,
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.on_stopped = NULL
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};
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static bool
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initialize (void *ctx, struct plugin_api *api)
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{
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g_data = (struct plugin_data) { .ctx = ctx, .api = api };
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api->register_service (ctx, &g_irc_service);
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return true;
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}
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struct plugin_info ponymap_plugin_info =
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{
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.api_version = API_VERSION,
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.initialize = initialize
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};
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