X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd-alex.git;a=blobdiff_plain;f=src%2Fngircd%2Fparse.c;h=5d8f0d591a74a2eec63abd94f4af9d7690d4a46f;hp=66bfef53052322dd9c986d0dee19af9372f12e75;hb=13761f1ec9b689c21d785521665bb7cb7370246a;hpb=110be707c306683c666bd736a8dcd7aef86d9f21 diff --git a/src/ngircd/parse.c b/src/ngircd/parse.c index 66bfef53..5d8f0d59 100644 --- a/src/ngircd/parse.c +++ b/src/ngircd/parse.c @@ -1,6 +1,6 @@ /* * ngIRCd -- The Next Generation IRC Daemon - * Copyright (c)2001-2010 Alexander Barton (alex@barton.de) + * Copyright (c)2001-2018 Alexander Barton (alex@barton.de) and Contributors. * * 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 @@ -16,30 +16,29 @@ * IRC command parser and validator. */ -#include "imp.h" #include #include -#include #include #include #include "ngircd.h" -#include "defines.h" #include "conn-func.h" +#include "conf.h" #include "channel.h" #include "log.h" #include "messages.h" -#include "tool.h" -#include "exp.h" #include "parse.h" -#include "imp.h" #include "irc.h" #include "irc-cap.h" #include "irc-channel.h" +#ifdef ICONV +# include "irc-encoding.h" +#endif #include "irc-info.h" #include "irc-login.h" +#include "irc-metadata.h" #include "irc-mode.h" #include "irc-op.h" #include "irc-oper.h" @@ -47,9 +46,6 @@ #include "irc-write.h" #include "numeric.h" -#include "exp.h" -#include "conf.h" - struct _NUMERIC { int numeric; bool (*function) PARAMS(( CLIENT *Client, REQUEST *Request )); @@ -58,67 +54,81 @@ struct _NUMERIC { static COMMAND My_Commands[] = { - { "ADMIN", IRC_ADMIN, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "AWAY", IRC_AWAY, CLIENT_USER, 0, 0, 0 }, - { "CONNECT", IRC_CONNECT, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "DIE", IRC_DIE, CLIENT_USER, 0, 0, 0 }, - { "DISCONNECT", IRC_DISCONNECT, CLIENT_USER, 0, 0, 0 }, - { "ERROR", IRC_ERROR, 0xFFFF, 0, 0, 0 }, - { "GLINE", IRC_xLINE, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "HELP", IRC_HELP, CLIENT_USER, 0, 0, 0 }, - { "INFO", IRC_INFO, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "INVITE", IRC_INVITE, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "ISON", IRC_ISON, CLIENT_USER, 0, 0, 0 }, - { "JOIN", IRC_JOIN, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "KICK", IRC_KICK, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "KILL", IRC_KILL, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "KLINE", IRC_xLINE, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "LINKS", IRC_LINKS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "LIST", IRC_LIST, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "LUSERS", IRC_LUSERS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "MODE", IRC_MODE, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "MOTD", IRC_MOTD, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "NAMES", IRC_NAMES, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "NICK", IRC_NICK, 0xFFFF, 0, 0, 0 }, - { "NJOIN", IRC_NJOIN, CLIENT_SERVER, 0, 0, 0 }, - { "NOTICE", IRC_NOTICE, 0xFFFF, 0, 0, 0 }, - { "OPER", IRC_OPER, CLIENT_USER, 0, 0, 0 }, - { "PART", IRC_PART, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "PASS", IRC_PASS, 0xFFFF, 0, 0, 0 }, - { "PING", IRC_PING, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "PONG", IRC_PONG, 0xFFFF, 0, 0, 0 }, - { "PRIVMSG", IRC_PRIVMSG, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "QUIT", IRC_QUIT, 0xFFFF, 0, 0, 0 }, - { "REHASH", IRC_REHASH, CLIENT_USER, 0, 0, 0 }, - { "RESTART", IRC_RESTART, CLIENT_USER, 0, 0, 0 }, - { "SERVER", IRC_SERVER, 0xFFFF, 0, 0, 0 }, - { "SERVICE", IRC_SERVICE, 0xFFFF, 0, 0, 0 }, - { "SERVLIST", IRC_SERVLIST, CLIENT_USER, 0, 0, 0 }, - { "SQUERY", IRC_SQUERY, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "SQUIT", IRC_SQUIT, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "STATS", IRC_STATS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "SUMMON", IRC_SUMMON, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "TIME", IRC_TIME, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "TOPIC", IRC_TOPIC, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "TRACE", IRC_TRACE, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "USER", IRC_USER, 0xFFFF, 0, 0, 0 }, - { "USERHOST", IRC_USERHOST, CLIENT_USER, 0, 0, 0 }, - { "USERS", IRC_USERS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "VERSION", IRC_VERSION, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "WALLOPS", IRC_WALLOPS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "WEBIRC", IRC_WEBIRC, CLIENT_UNKNOWN, 0, 0, 0 }, - { "WHO", IRC_WHO, CLIENT_USER, 0, 0, 0 }, - { "WHOIS", IRC_WHOIS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, - { "WHOWAS", IRC_WHOWAS, CLIENT_USER|CLIENT_SERVER, 0, 0, 0 }, +#define _CMD(name, func, type, min, max, penalty) \ + { (name), (func), (type), (min), (max), (penalty), 0, 0, 0 } + _CMD("ADMIN", IRC_ADMIN, CLIENT_USER|CLIENT_SERVER, 0, 1, 1), + _CMD("AWAY", IRC_AWAY, CLIENT_USER, 0, 1, 0), + _CMD("CAP", IRC_CAP, CLIENT_ANY, 1, 2, 0), + _CMD("CONNECT", IRC_CONNECT, CLIENT_USER|CLIENT_SERVER, 0, -1, 0), +#ifdef STRICT_RFC + _CMD("DIE", IRC_DIE, CLIENT_USER, 0, 0, 0), +#else + _CMD("DIE", IRC_DIE, CLIENT_USER, 0, 1, 0), +#endif + _CMD("DISCONNECT", IRC_DISCONNECT, CLIENT_USER, 1, 1, 0), + _CMD("ERROR", IRC_ERROR, CLIENT_ANY, 0, -1, 0), + _CMD("GLINE", IRC_xLINE, CLIENT_USER|CLIENT_SERVER, 0, -1, 0), + _CMD("HELP", IRC_HELP, CLIENT_USER, 0, 1, 2), + _CMD("INFO", IRC_INFO, CLIENT_USER|CLIENT_SERVER, 0, 1, 2), + _CMD("INVITE", IRC_INVITE, CLIENT_USER|CLIENT_SERVER, 2, 2, 1), + _CMD("ISON", IRC_ISON, CLIENT_USER, 1, -1, 0), + _CMD("JOIN", IRC_JOIN, CLIENT_USER|CLIENT_SERVER, 1, 2, 0), + _CMD("KICK", IRC_KICK, CLIENT_USER|CLIENT_SERVER, 2, 3, 0), + _CMD("KILL", IRC_KILL, CLIENT_USER|CLIENT_SERVER, 2, 2, 0), + _CMD("KLINE", IRC_xLINE, CLIENT_USER|CLIENT_SERVER, 0, -1, 0), + _CMD("LINKS", IRC_LINKS, CLIENT_USER|CLIENT_SERVER, 0, 2, 1), + _CMD("LIST", IRC_LIST, CLIENT_USER|CLIENT_SERVER, 0, 2, 2), + _CMD("LUSERS", IRC_LUSERS, CLIENT_USER|CLIENT_SERVER, 0, 2, 1), + _CMD("METADATA", IRC_METADATA, CLIENT_SERVER, 3, 3, 0), + _CMD("MODE", IRC_MODE, CLIENT_USER|CLIENT_SERVER, 1, -1, 1), + _CMD("MOTD", IRC_MOTD, CLIENT_USER|CLIENT_SERVER, 0, 1, 3), + _CMD("NAMES", IRC_NAMES, CLIENT_USER|CLIENT_SERVER, 0, 2, 1), + _CMD("NICK", IRC_NICK, CLIENT_ANY, 0, -1, 0), + _CMD("NJOIN", IRC_NJOIN, CLIENT_SERVER, 2, 2, 0), + _CMD("NOTICE", IRC_NOTICE, CLIENT_ANY, 0, -1, 0), + _CMD("OPER", IRC_OPER, CLIENT_USER, 2, 2, 0), + _CMD("PART", IRC_PART, CLIENT_USER|CLIENT_SERVER, 1, 2, 0), + _CMD("PASS", IRC_PASS, CLIENT_ANY, 0, -1, 0), + _CMD("PING", IRC_PING, CLIENT_USER|CLIENT_SERVER, 0, -1, 0), + _CMD("PONG", IRC_PONG, CLIENT_ANY, 0, -1, 0), + _CMD("PRIVMSG", IRC_PRIVMSG, CLIENT_USER|CLIENT_SERVER, 0, 2, 0), + _CMD("QUIT", IRC_QUIT, CLIENT_ANY, 0, 1, 0), + _CMD("REHASH", IRC_REHASH, CLIENT_USER, 0, 0, 0), + _CMD("RESTART", IRC_RESTART, CLIENT_USER, 0, 0, 0), + _CMD("SERVER", IRC_SERVER, CLIENT_ANY, 0, -1, 0), + _CMD("SERVICE", IRC_SERVICE, CLIENT_ANY, 6, 6, 0), + _CMD("SERVLIST", IRC_SERVLIST, CLIENT_USER, 0, 2, 1), + _CMD("SQUERY", IRC_SQUERY, CLIENT_USER|CLIENT_SERVER, 0, 2, 0), + _CMD("SQUIT", IRC_SQUIT, CLIENT_USER|CLIENT_SERVER, 2, 2, 0), + _CMD("STATS", IRC_STATS, CLIENT_USER|CLIENT_SERVER, 0, 2, 2), + _CMD("SVSNICK", IRC_SVSNICK, CLIENT_SERVER, 2, 2, 0), + _CMD("SUMMON", IRC_SUMMON, CLIENT_USER|CLIENT_SERVER, 0, -1, 0), + _CMD("TIME", IRC_TIME, CLIENT_USER|CLIENT_SERVER, 0, 1, 1), + _CMD("TOPIC", IRC_TOPIC, CLIENT_USER|CLIENT_SERVER, 1, 2, 1), + _CMD("TRACE", IRC_TRACE, CLIENT_USER|CLIENT_SERVER, 0, 1, 3), + _CMD("USER", IRC_USER, CLIENT_ANY, 0, -1, 0), + _CMD("USERHOST", IRC_USERHOST, CLIENT_USER, 1, -1, 1), + _CMD("USERS", IRC_USERS, CLIENT_USER|CLIENT_SERVER, 0, -1, 0), + _CMD("VERSION", IRC_VERSION, CLIENT_USER|CLIENT_SERVER, 0, 1, 1), + _CMD("WALLOPS", IRC_WALLOPS, CLIENT_USER|CLIENT_SERVER, 1, 1, 0), + _CMD("WEBIRC", IRC_WEBIRC, CLIENT_UNKNOWN, 4, 4, 0), + _CMD("WHO", IRC_WHO, CLIENT_USER, 0, 2, 1), + _CMD("WHOIS", IRC_WHOIS, CLIENT_USER|CLIENT_SERVER, 0, -1, 1), + _CMD("WHOWAS", IRC_WHOWAS, CLIENT_USER|CLIENT_SERVER, 0, -1, 0), + #ifdef IRCPLUS - { "CHANINFO", IRC_CHANINFO, CLIENT_SERVER, 0, 0, 0 }, + _CMD("CHANINFO", IRC_CHANINFO, CLIENT_SERVER, 0, -1, 0), +# ifdef ICONV + _CMD("CHARCONV", IRC_CHARCONV, CLIENT_USER, 1, 1, 0), +# endif #endif + #ifndef STRICT_RFC - { "CAP", IRC_CAP, 0xFFFF, 0, 0, 0 }, - { "GET", IRC_QUIT_HTTP, CLIENT_UNKNOWN, 0, 0, 0 }, - { "POST", IRC_QUIT_HTTP, CLIENT_UNKNOWN, 0, 0, 0 }, + _CMD("GET", IRC_QUIT_HTTP, CLIENT_UNKNOWN, 0, -1, 0), + _CMD("POST", IRC_QUIT_HTTP, CLIENT_UNKNOWN, 0, -1, 0), #endif - { NULL, NULL, 0x0, 0, 0, 0 } /* Ende-Marke */ + _CMD(NULL, NULL, 0, 0, 0, 0) /* End-Mark */ +#undef _CMD }; static void Init_Request PARAMS(( REQUEST *Req )); @@ -146,9 +156,9 @@ Parse_GetCommandStruct( void ) /** * Parse a command ("request") received from a client. - * + * * This function is called after the connection layer received a valid CR+LF - * terminated line of text: we asume that this is a valid IRC command and + * terminated line of text: we assume that this is a valid IRC command and * try to do something useful with it :-) * * All errors are reported to the client from which the command has been @@ -159,8 +169,8 @@ Parse_GetCommandStruct( void ) * * @param Idx Index of the connection from which the command has been received. * @param Request NULL terminated line of text (the "command"). - * @return true on success (valid command or "regular" error), false if a - * fatal error occured and the connection has been shut down. + * @return CONNECTED on success (valid command or "regular" error), DISCONNECTED + * if a fatal error occurred and the connection has been shut down. */ GLOBAL bool Parse_Request( CONN_ID Idx, char *Request ) @@ -247,11 +257,14 @@ Parse_Request( CONN_ID Idx, char *Request ) } } - if( ! Validate_Prefix( Idx, &req, &closed )) return ! closed; - if( ! Validate_Command( Idx, &req, &closed )) return ! closed; - if( ! Validate_Args( Idx, &req, &closed )) return ! closed; + if(!Validate_Prefix(Idx, &req, &closed)) + return !closed; + if(!Validate_Command(Idx, &req, &closed)) + return !closed; + if(!Validate_Args(Idx, &req, &closed)) + return !closed; - return Handle_Request( Idx, &req ); + return Handle_Request(Idx, &req); } /* Parse_Request */ @@ -262,8 +275,6 @@ Parse_Request( CONN_ID Idx, char *Request ) static void Init_Request( REQUEST *Req ) { - /* Neue Request-Struktur initialisieren */ - int i; assert( Req != NULL ); @@ -314,36 +325,38 @@ Validate_Prefix( CONN_ID Idx, REQUEST *Req, bool *Closed ) } /* check if client in prefix is known */ - c = Client_Search( Req->prefix ); + c = Client_Search(Req->prefix); if (!c) { - Log(LOG_ERR, - "Invalid prefix \"%s\", client not known (connection %d, command \"%s\")!?", - Req->prefix, Idx, Req->command); - if (!Conn_WriteStr(Idx, - "ERROR :Invalid prefix \"%s\", client not known", - Req->prefix)) - *Closed = true; + if (Client_Type(client) != CLIENT_SERVER) { + Log(LOG_ERR, + "Ignoring command with invalid prefix \"%s\" from \"%s\" (connection %d, command \"%s\")!", + Req->prefix, Client_ID(client), Idx, Req->command); + if (!Conn_WriteStr(Idx, + "ERROR :Invalid prefix \"%s\"", + Req->prefix)) + *Closed = true; + IRC_SetPenalty(client, 2); + } else + LogDebug("Ignoring command with invalid prefix \"%s\" from \"%s\" (connection %d, command \"%s\")!", + Req->prefix, Client_ID(client), Idx, Req->command); return false; } /* check if the client named in the prefix is expected * to come from that direction */ if (Client_NextHop(c) != client) { - if (Client_Type(c) != CLIENT_SERVER) { + if (Client_Type(client) != CLIENT_SERVER) { Log(LOG_ERR, - "Spoofed prefix \"%s\" from \"%s\" (connection %d, command \"%s\")!", - Req->prefix, Client_Mask(Conn_GetClient(Idx)), Idx, - Req->command); + "Spoofed prefix \"%s\" from \"%s\" (connection %d, command \"%s\"), closing connection!", + Req->prefix, Client_ID(client), Idx, Req->command); Conn_Close(Idx, NULL, "Spoofed prefix", true); *Closed = true; } else { - Log(LOG_INFO, - "Ignoring spoofed prefix \"%s\" from \"%s\" (connection %d, command \"%s\").", - Req->prefix, Client_Mask(Conn_GetClient(Idx)), Idx, - Req->command); + Log(LOG_WARNING, + "Ignoring command with spoofed prefix \"%s\" from \"%s\" (connection %d, command \"%s\")!", + Req->prefix, Client_ID(client), Idx, Req->command); } return false; - } return true; @@ -358,7 +371,7 @@ Validate_Command( UNUSED CONN_ID Idx, UNUSED REQUEST *Req, bool *Closed ) *Closed = false; return true; -} /* Validate_Comman */ +} /* Validate_Command */ static bool @@ -410,7 +423,7 @@ Handle_Numeric(CLIENT *client, REQUEST *Req) { 376, IRC_Num_ENDOFMOTD } }; int i, num; - char str[LINE_LEN]; + char str[COMMAND_LEN]; CLIENT *prefix, *target = NULL; /* Determine target */ @@ -451,10 +464,10 @@ Handle_Numeric(CLIENT *client, REQUEST *Req) } /* Determine source */ - if (! Req->prefix[0]) { - /* Oops, no prefix!? */ - Log(LOG_WARNING, "Got status code %s from \"%s\" without prefix!?", - Req->command, Client_ID(client)); + if (!Req->prefix) { + Log(LOG_WARNING, + "Got status code %s from \"%s\" without prefix!?", + Req->command, Client_ID(client)); return true; } @@ -480,7 +493,7 @@ static bool Handle_Request( CONN_ID Idx, REQUEST *Req ) { CLIENT *client; - bool result = true; + bool result = CONNECTED; int client_type; COMMAND *cmd; @@ -505,10 +518,28 @@ Handle_Request( CONN_ID Idx, REQUEST *Req ) continue; } - if (!(client_type & cmd->type)) - return IRC_WriteStrClient(client, ERR_NOTREGISTERED_MSG, Client_ID(client)); + if (!(client_type & cmd->type)) { + if (client_type == CLIENT_USER + && cmd->type & CLIENT_SERVER) + return IRC_WriteErrClient(client, + ERR_NOTREGISTEREDSERVER_MSG, + Client_ID(client)); + else + return IRC_WriteErrClient(client, + ERR_NOTREGISTERED_MSG, + Client_ID(client)); + } + + if (cmd->penalty) + IRC_SetPenalty(client, cmd->penalty); + + if (Req->argc < cmd->min_argc || + (cmd->max_argc != -1 && Req->argc > cmd->max_argc)) + return IRC_WriteErrClient(client, ERR_NEEDMOREPARAMS_MSG, + Client_ID(client), Req->command); - /* Command is allowed for this client: call it and count produced bytes */ + /* Command is allowed for this client: call it and count + * generated bytes in output */ Conn_ResetWCounter(); result = (cmd->function)(client, Req); cmd->bytes += Conn_WCounter(); @@ -518,6 +549,8 @@ Handle_Request( CONN_ID Idx, REQUEST *Req ) cmd->lcount++; else cmd->rcount++; + + /* Return result of command (CONNECTED/DISCONNECTED). */ return result; } @@ -526,17 +559,16 @@ Handle_Request( CONN_ID Idx, REQUEST *Req ) client_type != CLIENT_SERVICE ) return true; - /* Unknown command and registered connection: generate error: */ LogDebug("Connection %d: Unknown command \"%s\", %d %s,%s prefix.", Client_Conn( client ), Req->command, Req->argc, Req->argc == 1 ? "parameter" : "parameters", Req->prefix ? "" : " no" ); - if (Client_Type(client) != CLIENT_SERVER) { - result = IRC_WriteStrClient(client, ERR_UNKNOWNCOMMAND_MSG, + /* Unknown command and registered connection: generate error: */ + if (client_type != CLIENT_SERVER) + result = IRC_WriteErrClient(client, ERR_UNKNOWNCOMMAND_MSG, Client_ID(client), Req->command); - Conn_SetPenalty(Idx, 1); - } + return result; } /* Handle_Request */