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adx |
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/* |
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* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
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* s_bsd.c: Network functions. |
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* |
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* Copyright (C) 2002 by the past and present ircd coders, and others. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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* USA |
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* |
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knight |
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* $Id$ |
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adx |
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*/ |
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#include "stdinc.h" |
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#ifndef _WIN32 |
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#include <netinet/in_systm.h> |
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#include <netinet/ip.h> |
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#include <netinet/tcp.h> |
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#endif |
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#include "fdlist.h" |
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#include "s_bsd.h" |
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#include "client.h" |
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#include "common.h" |
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#include "dbuf.h" |
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#include "event.h" |
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#include "irc_string.h" |
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#include "irc_getnameinfo.h" |
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#include "irc_getaddrinfo.h" |
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#include "ircd.h" |
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#include "list.h" |
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#include "listener.h" |
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#include "numeric.h" |
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#include "packet.h" |
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#include "irc_res.h" |
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#include "inet_misc.h" |
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#include "restart.h" |
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#include "s_auth.h" |
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#include "s_conf.h" |
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#include "s_log.h" |
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#include "s_serv.h" |
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#include "s_stats.h" |
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#include "send.h" |
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#include "memory.h" |
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#include "s_user.h" |
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#include "hook.h" |
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static const char *comm_err_str[] = { "Comm OK", "Error during bind()", |
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"Error during DNS lookup", "connect timeout", "Error during connect()", |
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"Comm Error" }; |
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struct Callback *setup_socket_cb = NULL; |
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static void comm_connect_callback(fde_t *fd, int status); |
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static PF comm_connect_timeout; |
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static void comm_connect_dns_callback(void *vptr, struct DNSReply *reply); |
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static PF comm_connect_tryconnect; |
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extern void init_netio(void); |
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/* check_can_use_v6() |
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* Check if the system can open AF_INET6 sockets |
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*/ |
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void |
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check_can_use_v6(void) |
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{ |
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#ifdef IPV6 |
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int v6; |
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if ((v6 = socket(AF_INET6, SOCK_STREAM, 0)) < 0) |
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ServerInfo.can_use_v6 = 0; |
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else |
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{ |
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ServerInfo.can_use_v6 = 1; |
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#ifdef _WIN32 |
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closesocket(v6); |
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#else |
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close(v6); |
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#endif |
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} |
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#else |
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ServerInfo.can_use_v6 = 0; |
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#endif |
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} |
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/* get_sockerr - get the error value from the socket or the current errno |
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* |
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* Get the *real* error from the socket (well try to anyway..). |
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* This may only work when SO_DEBUG is enabled but its worth the |
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* gamble anyway. |
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*/ |
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int |
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get_sockerr(int fd) |
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{ |
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#ifndef _WIN32 |
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int errtmp = errno; |
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#else |
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int errtmp = WSAGetLastError(); |
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#endif |
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#ifdef SO_ERROR |
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int err = 0; |
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socklen_t len = sizeof(err); |
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if (-1 < fd && !getsockopt(fd, SOL_SOCKET, SO_ERROR, (char*) &err, (socklen_t *)&len)) |
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{ |
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if (err) |
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errtmp = err; |
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} |
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errno = errtmp; |
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#endif |
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return errtmp; |
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} |
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/* |
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* report_error - report an error from an errno. |
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* Record error to log and also send a copy to all *LOCAL* opers online. |
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* |
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* text is a *format* string for outputing error. It must |
129 |
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* contain only two '%s', the first will be replaced |
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* by the sockhost from the client_p, and the latter will |
131 |
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* be taken from sys_errlist[errno]. |
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* |
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* client_p if not NULL, is the *LOCAL* client associated with |
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* the error. |
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* |
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* Cannot use perror() within daemon. stderr is closed in |
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* ircd and cannot be used. And, worse yet, it might have |
138 |
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* been reassigned to a normal connection... |
139 |
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* |
140 |
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* Actually stderr is still there IFF ircd was run with -s --Rodder |
141 |
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*/ |
142 |
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143 |
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void |
144 |
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report_error(int level, const char* text, const char* who, int error) |
145 |
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{ |
146 |
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who = (who) ? who : ""; |
147 |
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148 |
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sendto_realops_flags(UMODE_DEBUG, level, text, who, strerror(error)); |
149 |
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log_oper_action(LOG_IOERR_TYPE, NULL, "%s %s %s\n", who, text, strerror(error)); |
150 |
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ilog(L_ERROR, text, who, strerror(error)); |
151 |
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} |
152 |
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153 |
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/* |
154 |
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* setup_socket() |
155 |
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* |
156 |
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* Set the socket non-blocking, and other wonderful bits. |
157 |
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*/ |
158 |
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static void * |
159 |
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setup_socket(va_list args) |
160 |
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{ |
161 |
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int fd = va_arg(args, int); |
162 |
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int opt = 1; |
163 |
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164 |
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setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *) &opt, sizeof(opt)); |
165 |
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166 |
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#ifdef IPTOS_LOWDELAY |
167 |
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opt = IPTOS_LOWDELAY; |
168 |
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setsockopt(fd, IPPROTO_IP, IP_TOS, (char *) &opt, sizeof(opt)); |
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#endif |
170 |
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171 |
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#ifndef _WIN32 |
172 |
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fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK); |
173 |
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#endif |
174 |
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175 |
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return NULL; |
176 |
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} |
177 |
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178 |
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/* |
179 |
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* init_comm() |
180 |
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* |
181 |
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* Initializes comm subsystem. |
182 |
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*/ |
183 |
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void |
184 |
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init_comm(void) |
185 |
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{ |
186 |
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setup_socket_cb = register_callback("setup_socket", setup_socket); |
187 |
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init_netio(); |
188 |
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} |
189 |
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190 |
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/* |
191 |
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* close_connection |
192 |
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* Close the physical connection. This function must make |
193 |
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* MyConnect(client_p) == FALSE, and set client_p->from == NULL. |
194 |
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*/ |
195 |
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void |
196 |
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close_connection(struct Client *client_p) |
197 |
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{ |
198 |
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struct ConfItem *conf; |
199 |
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struct AccessItem *aconf; |
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struct ClassItem *aclass; |
201 |
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202 |
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assert(NULL != client_p); |
203 |
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204 |
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if (IsServer(client_p)) |
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{ |
206 |
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ServerStats->is_sv++; |
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ServerStats->is_sbs += client_p->localClient->send.bytes; |
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ServerStats->is_sbr += client_p->localClient->recv.bytes; |
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ServerStats->is_sti += CurrentTime - client_p->firsttime; |
210 |
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211 |
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/* XXX Does this even make any sense at all anymore? |
212 |
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* scheduling a 'quick' reconnect could cause a pile of |
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* nick collides under TSora protocol... -db |
214 |
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*/ |
215 |
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/* |
216 |
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* If the connection has been up for a long amount of time, schedule |
217 |
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* a 'quick' reconnect, else reset the next-connect cycle. |
218 |
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*/ |
219 |
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if ((conf = find_conf_exact(SERVER_TYPE, |
220 |
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client_p->name, client_p->username, |
221 |
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client_p->host))) |
222 |
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{ |
223 |
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/* |
224 |
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* Reschedule a faster reconnect, if this was a automatically |
225 |
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* connected configuration entry. (Note that if we have had |
226 |
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* a rehash in between, the status has been changed to |
227 |
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* CONF_ILLEGAL). But only do this if it was a "good" link. |
228 |
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*/ |
229 |
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aconf = (struct AccessItem *)map_to_conf(conf); |
230 |
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aclass = (struct ClassItem *)map_to_conf(aconf->class_ptr); |
231 |
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aconf->hold = time(NULL); |
232 |
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aconf->hold += (aconf->hold - client_p->since > HANGONGOODLINK) ? |
233 |
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HANGONRETRYDELAY : ConFreq(aclass); |
234 |
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if (nextconnect > aconf->hold) |
235 |
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nextconnect = aconf->hold; |
236 |
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} |
237 |
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} |
238 |
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else if (IsClient(client_p)) |
239 |
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{ |
240 |
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ServerStats->is_cl++; |
241 |
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ServerStats->is_cbs += client_p->localClient->send.bytes; |
242 |
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ServerStats->is_cbr += client_p->localClient->recv.bytes; |
243 |
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ServerStats->is_cti += CurrentTime - client_p->firsttime; |
244 |
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} |
245 |
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else |
246 |
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ServerStats->is_ni++; |
247 |
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248 |
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if (!IsDead(client_p)) |
249 |
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{ |
250 |
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/* attempt to flush any pending dbufs. Evil, but .. -- adrian */ |
251 |
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/* there is still a chance that we might send data to this socket |
252 |
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* even if it is marked as blocked (COMM_SELECT_READ handler is called |
253 |
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* before COMM_SELECT_WRITE). Let's try, nothing to lose.. -adx |
254 |
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*/ |
255 |
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ClearSendqBlocked(client_p); |
256 |
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send_queued_write(client_p); |
257 |
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} |
258 |
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259 |
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#ifdef HAVE_LIBCRYPTO |
260 |
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if (client_p->localClient->fd.ssl) |
261 |
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SSL_shutdown(client_p->localClient->fd.ssl); |
262 |
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#endif |
263 |
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if (client_p->localClient->fd.flags.open) |
264 |
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fd_close(&client_p->localClient->fd); |
265 |
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266 |
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if (HasServlink(client_p)) |
267 |
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{ |
268 |
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if (client_p->localClient->ctrlfd.flags.open) |
269 |
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fd_close(&client_p->localClient->ctrlfd); |
270 |
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} |
271 |
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272 |
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dbuf_clear(&client_p->localClient->buf_sendq); |
273 |
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dbuf_clear(&client_p->localClient->buf_recvq); |
274 |
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275 |
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MyFree(client_p->localClient->passwd); |
276 |
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detach_conf(client_p, CONF_TYPE); |
277 |
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client_p->from = NULL; /* ...this should catch them! >:) --msa */ |
278 |
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} |
279 |
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|
280 |
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#ifdef HAVE_LIBCRYPTO |
281 |
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/* |
282 |
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* ssl_handshake - let OpenSSL initialize the protocol. Register for |
283 |
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* read/write events if necessary. |
284 |
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*/ |
285 |
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static void |
286 |
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ssl_handshake(int fd, struct Client *client_p) |
287 |
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{ |
288 |
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int ret = SSL_accept(client_p->localClient->fd.ssl); |
289 |
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|
290 |
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if (ret <= 0) |
291 |
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switch (SSL_get_error(client_p->localClient->fd.ssl, ret)) |
292 |
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{ |
293 |
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case SSL_ERROR_WANT_WRITE: |
294 |
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comm_setselect(&client_p->localClient->fd, COMM_SELECT_WRITE, |
295 |
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(PF *) ssl_handshake, client_p, 0); |
296 |
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return; |
297 |
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|
298 |
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case SSL_ERROR_WANT_READ: |
299 |
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comm_setselect(&client_p->localClient->fd, COMM_SELECT_READ, |
300 |
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(PF *) ssl_handshake, client_p, 0); |
301 |
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return; |
302 |
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|
303 |
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default: |
304 |
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exit_client(client_p, client_p, "Error during SSL handshake"); |
305 |
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return; |
306 |
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} |
307 |
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|
308 |
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execute_callback(auth_cb, client_p); |
309 |
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} |
310 |
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#endif |
311 |
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|
312 |
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/* |
313 |
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* add_connection - creates a client which has just connected to us on |
314 |
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* the given fd. The sockhost field is initialized with the ip# of the host. |
315 |
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* An unique id is calculated now, in case it is needed for auth. |
316 |
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* The client is sent to the auth module for verification, and not put in |
317 |
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* any client list yet. |
318 |
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*/ |
319 |
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void |
320 |
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add_connection(struct Listener* listener, int fd) |
321 |
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{ |
322 |
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struct Client *new_client; |
323 |
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socklen_t len = sizeof(struct irc_ssaddr); |
324 |
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struct irc_ssaddr irn; |
325 |
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assert(NULL != listener); |
326 |
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|
327 |
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/* |
328 |
|
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* get the client socket name from the socket |
329 |
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* the client has already been checked out in accept_connection |
330 |
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*/ |
331 |
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|
332 |
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memset(&irn, 0, sizeof(irn)); |
333 |
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if (getpeername(fd, (struct sockaddr *)&irn, (socklen_t *)&len)) |
334 |
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{ |
335 |
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#ifdef _WIN32 |
336 |
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errno = WSAGetLastError(); |
337 |
|
|
#endif |
338 |
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report_error(L_ALL, "Failed in adding new connection %s :%s", |
339 |
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get_listener_name(listener), errno); |
340 |
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ServerStats->is_ref++; |
341 |
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#ifdef _WIN32 |
342 |
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closesocket(fd); |
343 |
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#else |
344 |
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close(fd); |
345 |
|
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#endif |
346 |
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return; |
347 |
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} |
348 |
|
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|
349 |
|
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#ifdef IPV6 |
350 |
|
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remove_ipv6_mapping(&irn); |
351 |
|
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#else |
352 |
|
|
irn.ss_len = len; |
353 |
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#endif |
354 |
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new_client = make_client(NULL); |
355 |
|
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fd_open(&new_client->localClient->fd, fd, 1, |
356 |
|
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(listener->flags & LISTENER_SSL) ? |
357 |
|
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"Incoming SSL connection" : "Incoming connection"); |
358 |
|
|
memset(&new_client->localClient->ip, 0, sizeof(struct irc_ssaddr)); |
359 |
|
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|
360 |
|
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/* |
361 |
|
|
* copy address to 'sockhost' as a string, copy it to host too |
362 |
|
|
* so we have something valid to put into error messages... |
363 |
|
|
*/ |
364 |
|
|
new_client->localClient->port = ntohs(irn.ss_port); |
365 |
|
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memcpy(&new_client->localClient->ip, &irn, sizeof(struct irc_ssaddr)); |
366 |
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|
367 |
|
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irc_getnameinfo((struct sockaddr*)&new_client->localClient->ip, |
368 |
|
|
new_client->localClient->ip.ss_len, new_client->sockhost, |
369 |
|
|
HOSTIPLEN, NULL, 0, NI_NUMERICHOST); |
370 |
|
|
new_client->localClient->aftype = new_client->localClient->ip.ss.ss_family; |
371 |
|
|
|
372 |
|
|
*new_client->host = '\0'; |
373 |
|
|
#ifdef IPV6 |
374 |
|
|
if (*new_client->sockhost == ':') |
375 |
|
|
strlcat(new_client->host, "0", HOSTLEN+1); |
376 |
|
|
|
377 |
|
|
if (new_client->localClient->aftype == AF_INET6 && |
378 |
|
|
ConfigFileEntry.dot_in_ip6_addr == 1) |
379 |
|
|
{ |
380 |
|
|
strlcat(new_client->host, new_client->sockhost,HOSTLEN+1); |
381 |
|
|
strlcat(new_client->host, ".", HOSTLEN+1); |
382 |
|
|
} else |
383 |
|
|
#endif |
384 |
|
|
strlcat(new_client->host, new_client->sockhost,HOSTLEN+1); |
385 |
|
|
|
386 |
|
|
new_client->localClient->listener = listener; |
387 |
|
|
++listener->ref_count; |
388 |
|
|
|
389 |
|
|
connect_id++; |
390 |
|
|
new_client->connect_id = connect_id; |
391 |
|
|
|
392 |
|
|
#ifdef HAVE_LIBCRYPTO |
393 |
|
|
if ((listener->flags & LISTENER_SSL)) |
394 |
|
|
{ |
395 |
|
|
if ((new_client->localClient->fd.ssl = SSL_new(ServerInfo.ctx)) == NULL) |
396 |
|
|
{ |
397 |
|
|
ilog(L_CRIT, "SSL_new() ERROR! -- %s", |
398 |
|
|
ERR_error_string(ERR_get_error(), NULL)); |
399 |
|
|
|
400 |
|
|
SetDead(new_client); |
401 |
|
|
exit_client(new_client, new_client, "SSL_new failed"); |
402 |
|
|
return; |
403 |
|
|
} |
404 |
|
|
|
405 |
|
|
SSL_set_fd(new_client->localClient->fd.ssl, fd); |
406 |
|
|
ssl_handshake(0, new_client); |
407 |
|
|
} |
408 |
|
|
else |
409 |
|
|
#endif |
410 |
|
|
execute_callback(auth_cb, new_client); |
411 |
|
|
} |
412 |
|
|
|
413 |
|
|
/* |
414 |
|
|
* stolen from squid - its a neat (but overused! :) routine which we |
415 |
|
|
* can use to see whether we can ignore this errno or not. It is |
416 |
|
|
* generally useful for non-blocking network IO related errnos. |
417 |
|
|
* -- adrian |
418 |
|
|
*/ |
419 |
|
|
int |
420 |
|
|
ignoreErrno(int ierrno) |
421 |
|
|
{ |
422 |
|
|
switch (ierrno) |
423 |
|
|
{ |
424 |
|
|
case EINPROGRESS: |
425 |
|
|
case EWOULDBLOCK: |
426 |
|
|
#if EAGAIN != EWOULDBLOCK |
427 |
|
|
case EAGAIN: |
428 |
|
|
#endif |
429 |
|
|
case EALREADY: |
430 |
|
|
case EINTR: |
431 |
|
|
#ifdef ERESTART |
432 |
|
|
case ERESTART: |
433 |
|
|
#endif |
434 |
|
|
return 1; |
435 |
|
|
default: |
436 |
|
|
return 0; |
437 |
|
|
} |
438 |
|
|
} |
439 |
|
|
|
440 |
|
|
/* |
441 |
|
|
* comm_settimeout() - set the socket timeout |
442 |
|
|
* |
443 |
|
|
* Set the timeout for the fd |
444 |
|
|
*/ |
445 |
|
|
void |
446 |
|
|
comm_settimeout(fde_t *fd, time_t timeout, PF *callback, void *cbdata) |
447 |
|
|
{ |
448 |
|
|
assert(fd->flags.open); |
449 |
|
|
|
450 |
|
|
fd->timeout = CurrentTime + (timeout / 1000); |
451 |
|
|
fd->timeout_handler = callback; |
452 |
|
|
fd->timeout_data = cbdata; |
453 |
|
|
} |
454 |
|
|
|
455 |
|
|
/* |
456 |
|
|
* comm_setflush() - set a flush function |
457 |
|
|
* |
458 |
|
|
* A flush function is simply a function called if found during |
459 |
|
|
* comm_timeouts(). Its basically a second timeout, except in this case |
460 |
|
|
* I'm too lazy to implement multiple timeout functions! :-) |
461 |
|
|
* its kinda nice to have it separate, since this is designed for |
462 |
|
|
* flush functions, and when comm_close() is implemented correctly |
463 |
|
|
* with close functions, we _actually_ don't call comm_close() here .. |
464 |
|
|
* -- originally Adrian's notes |
465 |
|
|
* comm_close() is replaced with fd_close() in fdlist.c |
466 |
|
|
*/ |
467 |
|
|
void |
468 |
|
|
comm_setflush(fde_t *fd, time_t timeout, PF *callback, void *cbdata) |
469 |
|
|
{ |
470 |
|
|
assert(fd->flags.open); |
471 |
|
|
|
472 |
|
|
fd->flush_timeout = CurrentTime + (timeout / 1000); |
473 |
|
|
fd->flush_handler = callback; |
474 |
|
|
fd->flush_data = cbdata; |
475 |
|
|
} |
476 |
|
|
|
477 |
|
|
/* |
478 |
|
|
* comm_checktimeouts() - check the socket timeouts |
479 |
|
|
* |
480 |
|
|
* All this routine does is call the given callback/cbdata, without closing |
481 |
|
|
* down the file descriptor. When close handlers have been implemented, |
482 |
|
|
* this will happen. |
483 |
|
|
*/ |
484 |
|
|
void |
485 |
|
|
comm_checktimeouts(void *notused) |
486 |
|
|
{ |
487 |
|
|
int i; |
488 |
|
|
fde_t *F; |
489 |
|
|
PF *hdl; |
490 |
|
|
void *data; |
491 |
|
|
|
492 |
|
|
for (i = 0; i < FD_HASH_SIZE; i++) |
493 |
|
|
for (F = fd_hash[i]; F != NULL; F = fd_next_in_loop) |
494 |
|
|
{ |
495 |
|
|
assert(F->flags.open); |
496 |
|
|
fd_next_in_loop = F->hnext; |
497 |
|
|
|
498 |
|
|
/* check flush functions */ |
499 |
|
|
if (F->flush_handler && F->flush_timeout > 0 && |
500 |
|
|
F->flush_timeout < CurrentTime) |
501 |
|
|
{ |
502 |
|
|
hdl = F->flush_handler; |
503 |
|
|
data = F->flush_data; |
504 |
|
|
comm_setflush(F, 0, NULL, NULL); |
505 |
|
|
hdl(F, data); |
506 |
|
|
} |
507 |
|
|
|
508 |
|
|
/* check timeouts */ |
509 |
|
|
if (F->timeout_handler && F->timeout > 0 && |
510 |
|
|
F->timeout < CurrentTime) |
511 |
|
|
{ |
512 |
|
|
/* Call timeout handler */ |
513 |
|
|
hdl = F->timeout_handler; |
514 |
|
|
data = F->timeout_data; |
515 |
|
|
comm_settimeout(F, 0, NULL, NULL); |
516 |
|
|
hdl(F, data); |
517 |
|
|
} |
518 |
|
|
} |
519 |
|
|
} |
520 |
|
|
|
521 |
|
|
/* |
522 |
|
|
* void comm_connect_tcp(int fd, const char *host, unsigned short port, |
523 |
|
|
* struct sockaddr *clocal, int socklen, |
524 |
|
|
* CNCB *callback, void *data, int aftype, int timeout) |
525 |
|
|
* Input: An fd to connect with, a host and port to connect to, |
526 |
|
|
* a local sockaddr to connect from + length(or NULL to use the |
527 |
|
|
* default), a callback, the data to pass into the callback, the |
528 |
|
|
* address family. |
529 |
|
|
* Output: None. |
530 |
|
|
* Side-effects: A non-blocking connection to the host is started, and |
531 |
|
|
* if necessary, set up for selection. The callback given |
532 |
|
|
* may be called now, or it may be called later. |
533 |
|
|
*/ |
534 |
|
|
void |
535 |
|
|
comm_connect_tcp(fde_t *fd, const char *host, unsigned short port, |
536 |
|
|
struct sockaddr *clocal, int socklen, CNCB *callback, |
537 |
|
|
void *data, int aftype, int timeout) |
538 |
|
|
{ |
539 |
|
|
struct addrinfo hints, *res; |
540 |
|
|
char portname[PORTNAMELEN+1]; |
541 |
|
|
|
542 |
|
|
assert(callback); |
543 |
|
|
fd->connect.callback = callback; |
544 |
|
|
fd->connect.data = data; |
545 |
|
|
|
546 |
|
|
fd->connect.hostaddr.ss.ss_family = aftype; |
547 |
|
|
fd->connect.hostaddr.ss_port = htons(port); |
548 |
|
|
|
549 |
|
|
/* Note that we're using a passed sockaddr here. This is because |
550 |
|
|
* generally you'll be bind()ing to a sockaddr grabbed from |
551 |
|
|
* getsockname(), so this makes things easier. |
552 |
|
|
* XXX If NULL is passed as local, we should later on bind() to the |
553 |
|
|
* virtual host IP, for completeness. |
554 |
|
|
* -- adrian |
555 |
|
|
*/ |
556 |
|
|
if ((clocal != NULL) && (bind(fd->fd, clocal, socklen) < 0)) |
557 |
|
|
{ |
558 |
|
|
/* Failure, call the callback with COMM_ERR_BIND */ |
559 |
|
|
comm_connect_callback(fd, COMM_ERR_BIND); |
560 |
|
|
/* ... and quit */ |
561 |
|
|
return; |
562 |
|
|
} |
563 |
|
|
|
564 |
|
|
/* Next, if we have been given an IP, get the addr and skip the |
565 |
|
|
* DNS check (and head direct to comm_connect_tryconnect(). |
566 |
|
|
*/ |
567 |
|
|
memset(&hints, 0, sizeof(hints)); |
568 |
|
|
hints.ai_family = AF_UNSPEC; |
569 |
|
|
hints.ai_socktype = SOCK_STREAM; |
570 |
|
|
hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST; |
571 |
|
|
|
572 |
|
|
snprintf(portname, PORTNAMELEN, "%d", port); |
573 |
|
|
|
574 |
|
|
if (irc_getaddrinfo(host, portname, &hints, &res)) |
575 |
|
|
{ |
576 |
|
|
/* Send the DNS request, for the next level */ |
577 |
|
|
fd->dns_query = MyMalloc(sizeof(struct DNSQuery)); |
578 |
|
|
fd->dns_query->ptr = fd; |
579 |
|
|
fd->dns_query->callback = comm_connect_dns_callback; |
580 |
|
|
gethost_byname(host, fd->dns_query); |
581 |
|
|
} |
582 |
|
|
else |
583 |
|
|
{ |
584 |
|
|
/* We have a valid IP, so we just call tryconnect */ |
585 |
|
|
/* Make sure we actually set the timeout here .. */ |
586 |
|
|
assert(res != NULL); |
587 |
|
|
memcpy(&fd->connect.hostaddr, res->ai_addr, res->ai_addrlen); |
588 |
|
|
fd->connect.hostaddr.ss_len = res->ai_addrlen; |
589 |
|
|
fd->connect.hostaddr.ss.ss_family = res->ai_family; |
590 |
|
|
irc_freeaddrinfo(res); |
591 |
|
|
comm_settimeout(fd, timeout*1000, comm_connect_timeout, NULL); |
592 |
|
|
comm_connect_tryconnect(fd, NULL); |
593 |
|
|
} |
594 |
|
|
} |
595 |
|
|
|
596 |
|
|
/* |
597 |
|
|
* comm_connect_callback() - call the callback, and continue with life |
598 |
|
|
*/ |
599 |
|
|
static void |
600 |
|
|
comm_connect_callback(fde_t *fd, int status) |
601 |
|
|
{ |
602 |
|
|
CNCB *hdl; |
603 |
|
|
|
604 |
|
|
/* This check is gross..but probably necessary */ |
605 |
|
|
if (fd->connect.callback == NULL) |
606 |
|
|
return; |
607 |
|
|
|
608 |
|
|
/* Clear the connect flag + handler */ |
609 |
|
|
hdl = fd->connect.callback; |
610 |
|
|
fd->connect.callback = NULL; |
611 |
|
|
|
612 |
|
|
/* Clear the timeout handler */ |
613 |
|
|
comm_settimeout(fd, 0, NULL, NULL); |
614 |
|
|
|
615 |
|
|
/* Call the handler */ |
616 |
|
|
hdl(fd, status, fd->connect.data); |
617 |
|
|
} |
618 |
|
|
|
619 |
|
|
/* |
620 |
|
|
* comm_connect_timeout() - this gets called when the socket connection |
621 |
|
|
* times out. This *only* can be called once connect() is initially |
622 |
|
|
* called .. |
623 |
|
|
*/ |
624 |
|
|
static void |
625 |
|
|
comm_connect_timeout(fde_t *fd, void *notused) |
626 |
|
|
{ |
627 |
|
|
/* error! */ |
628 |
|
|
comm_connect_callback(fd, COMM_ERR_TIMEOUT); |
629 |
|
|
} |
630 |
|
|
|
631 |
|
|
/* |
632 |
|
|
* comm_connect_dns_callback() - called at the completion of the DNS request |
633 |
|
|
* |
634 |
|
|
* The DNS request has completed, so if we've got an error, return it, |
635 |
|
|
* otherwise we initiate the connect() |
636 |
|
|
*/ |
637 |
|
|
static void |
638 |
|
|
comm_connect_dns_callback(void *vptr, struct DNSReply *reply) |
639 |
|
|
{ |
640 |
|
|
fde_t *F = vptr; |
641 |
|
|
|
642 |
|
|
if (reply == NULL) |
643 |
|
|
{ |
644 |
|
|
MyFree(F->dns_query); |
645 |
|
|
F->dns_query = NULL; |
646 |
|
|
comm_connect_callback(F, COMM_ERR_DNS); |
647 |
|
|
return; |
648 |
|
|
} |
649 |
|
|
|
650 |
|
|
/* No error, set a 10 second timeout */ |
651 |
|
|
comm_settimeout(F, 30*1000, comm_connect_timeout, NULL); |
652 |
|
|
|
653 |
|
|
/* Copy over the DNS reply info so we can use it in the connect() */ |
654 |
|
|
/* |
655 |
|
|
* Note we don't fudge the refcount here, because we aren't keeping |
656 |
|
|
* the DNS record around, and the DNS cache is gone anyway.. |
657 |
|
|
* -- adrian |
658 |
|
|
*/ |
659 |
|
|
memcpy(&F->connect.hostaddr, &reply->addr, reply->addr.ss_len); |
660 |
|
|
/* The cast is hacky, but safe - port offset is same on v4 and v6 */ |
661 |
|
|
((struct sockaddr_in *) &F->connect.hostaddr)->sin_port = |
662 |
|
|
F->connect.hostaddr.ss_port; |
663 |
|
|
F->connect.hostaddr.ss_len = reply->addr.ss_len; |
664 |
|
|
|
665 |
|
|
/* Now, call the tryconnect() routine to try a connect() */ |
666 |
|
|
MyFree(F->dns_query); |
667 |
|
|
F->dns_query = NULL; |
668 |
|
|
comm_connect_tryconnect(F, NULL); |
669 |
|
|
} |
670 |
|
|
|
671 |
|
|
/* static void comm_connect_tryconnect(int fd, void *notused) |
672 |
|
|
* Input: The fd, the handler data(unused). |
673 |
|
|
* Output: None. |
674 |
|
|
* Side-effects: Try and connect with pending connect data for the FD. If |
675 |
|
|
* we succeed or get a fatal error, call the callback. |
676 |
|
|
* Otherwise, it is still blocking or something, so register |
677 |
|
|
* to select for a write event on this FD. |
678 |
|
|
*/ |
679 |
|
|
static void |
680 |
|
|
comm_connect_tryconnect(fde_t *fd, void *notused) |
681 |
|
|
{ |
682 |
|
|
int retval; |
683 |
|
|
|
684 |
|
|
/* This check is needed or re-entrant s_bsd_* like sigio break it. */ |
685 |
|
|
if (fd->connect.callback == NULL) |
686 |
|
|
return; |
687 |
|
|
|
688 |
|
|
/* Try the connect() */ |
689 |
|
|
retval = connect(fd->fd, (struct sockaddr *) &fd->connect.hostaddr, |
690 |
|
|
fd->connect.hostaddr.ss_len); |
691 |
|
|
|
692 |
|
|
/* Error? */ |
693 |
|
|
if (retval < 0) |
694 |
|
|
{ |
695 |
|
|
#ifdef _WIN32 |
696 |
|
|
errno = WSAGetLastError(); |
697 |
|
|
#endif |
698 |
|
|
/* |
699 |
|
|
* If we get EISCONN, then we've already connect()ed the socket, |
700 |
|
|
* which is a good thing. |
701 |
|
|
* -- adrian |
702 |
|
|
*/ |
703 |
|
|
if (errno == EISCONN) |
704 |
|
|
comm_connect_callback(fd, COMM_OK); |
705 |
|
|
else if (ignoreErrno(errno)) |
706 |
|
|
/* Ignore error? Reschedule */ |
707 |
|
|
comm_setselect(fd, COMM_SELECT_WRITE, comm_connect_tryconnect, |
708 |
|
|
NULL, 0); |
709 |
|
|
else |
710 |
|
|
/* Error? Fail with COMM_ERR_CONNECT */ |
711 |
|
|
comm_connect_callback(fd, COMM_ERR_CONNECT); |
712 |
|
|
return; |
713 |
|
|
} |
714 |
|
|
|
715 |
|
|
/* If we get here, we've suceeded, so call with COMM_OK */ |
716 |
|
|
comm_connect_callback(fd, COMM_OK); |
717 |
|
|
} |
718 |
|
|
|
719 |
|
|
/* |
720 |
|
|
* comm_errorstr() - return an error string for the given error condition |
721 |
|
|
*/ |
722 |
|
|
const char * |
723 |
|
|
comm_errstr(int error) |
724 |
|
|
{ |
725 |
|
|
if (error < 0 || error >= COMM_ERR_MAX) |
726 |
|
|
return "Invalid error number!"; |
727 |
|
|
return comm_err_str[error]; |
728 |
|
|
} |
729 |
|
|
|
730 |
|
|
/* |
731 |
|
|
* comm_open() - open a socket |
732 |
|
|
* |
733 |
|
|
* This is a highly highly cut down version of squid's comm_open() which |
734 |
|
|
* for the most part emulates socket(), *EXCEPT* it fails if we're about |
735 |
|
|
* to run out of file descriptors. |
736 |
|
|
*/ |
737 |
|
|
int |
738 |
|
|
comm_open(fde_t *F, int family, int sock_type, int proto, const char *note) |
739 |
|
|
{ |
740 |
|
|
int fd; |
741 |
|
|
|
742 |
|
|
/* First, make sure we aren't going to run out of file descriptors */ |
743 |
|
|
if (number_fd >= hard_fdlimit) |
744 |
|
|
{ |
745 |
|
|
errno = ENFILE; |
746 |
|
|
return -1; |
747 |
|
|
} |
748 |
|
|
|
749 |
|
|
/* |
750 |
|
|
* Next, we try to open the socket. We *should* drop the reserved FD |
751 |
|
|
* limit if/when we get an error, but we can deal with that later. |
752 |
|
|
* XXX !!! -- adrian |
753 |
|
|
*/ |
754 |
|
|
fd = socket(family, sock_type, proto); |
755 |
|
|
if (fd < 0) |
756 |
|
|
{ |
757 |
|
|
#ifdef _WIN32 |
758 |
|
|
errno = WSAGetLastError(); |
759 |
|
|
#endif |
760 |
|
|
return -1; /* errno will be passed through, yay.. */ |
761 |
|
|
} |
762 |
|
|
|
763 |
|
|
execute_callback(setup_socket_cb, fd); |
764 |
|
|
|
765 |
|
|
/* update things in our fd tracking */ |
766 |
|
|
fd_open(F, fd, 1, note); |
767 |
|
|
return 0; |
768 |
|
|
} |
769 |
|
|
|
770 |
|
|
/* |
771 |
|
|
* comm_accept() - accept an incoming connection |
772 |
|
|
* |
773 |
|
|
* This is a simple wrapper for accept() which enforces FD limits like |
774 |
|
|
* comm_open() does. Returned fd must be either closed or tagged with |
775 |
|
|
* fd_open (this function no longer does it). |
776 |
|
|
*/ |
777 |
|
|
int |
778 |
|
|
comm_accept(struct Listener *lptr, struct irc_ssaddr *pn) |
779 |
|
|
{ |
780 |
|
|
int newfd; |
781 |
|
|
socklen_t addrlen = sizeof(struct irc_ssaddr); |
782 |
|
|
|
783 |
|
|
if (number_fd >= hard_fdlimit) |
784 |
|
|
{ |
785 |
|
|
errno = ENFILE; |
786 |
|
|
return -1; |
787 |
|
|
} |
788 |
|
|
|
789 |
|
|
/* |
790 |
|
|
* Next, do the accept(). if we get an error, we should drop the |
791 |
|
|
* reserved fd limit, but we can deal with that when comm_open() |
792 |
|
|
* also does it. XXX -- adrian |
793 |
|
|
*/ |
794 |
|
|
newfd = accept(lptr->fd.fd, (struct sockaddr *)pn, (socklen_t *)&addrlen); |
795 |
|
|
if (newfd < 0) |
796 |
|
|
{ |
797 |
|
|
#ifdef _WIN32 |
798 |
|
|
errno = WSAGetLastError(); |
799 |
|
|
#endif |
800 |
|
|
return -1; |
801 |
|
|
} |
802 |
|
|
|
803 |
|
|
#ifdef IPV6 |
804 |
|
|
remove_ipv6_mapping(pn); |
805 |
|
|
#else |
806 |
|
|
pn->ss_len = addrlen; |
807 |
|
|
#endif |
808 |
|
|
|
809 |
|
|
execute_callback(setup_socket_cb, newfd); |
810 |
|
|
|
811 |
|
|
/* .. and return */ |
812 |
|
|
return newfd; |
813 |
|
|
} |
814 |
|
|
|
815 |
|
|
/* |
816 |
|
|
* remove_ipv6_mapping() - Removes IPv4-In-IPv6 mapping from an address |
817 |
|
|
* This function should really inspect the struct itself rather than relying |
818 |
|
|
* on inet_pton and inet_ntop. OSes with IPv6 mapping listening on both |
819 |
|
|
* AF_INET and AF_INET6 map AF_INET connections inside AF_INET6 structures |
820 |
|
|
* |
821 |
|
|
*/ |
822 |
|
|
#ifdef IPV6 |
823 |
|
|
void |
824 |
|
|
remove_ipv6_mapping(struct irc_ssaddr *addr) |
825 |
|
|
{ |
826 |
|
|
if (addr->ss.ss_family == AF_INET6) |
827 |
|
|
{ |
828 |
|
|
struct sockaddr_in6 *v6; |
829 |
|
|
|
830 |
|
|
v6 = (struct sockaddr_in6*)addr; |
831 |
|
|
if (IN6_IS_ADDR_V4MAPPED(&v6->sin6_addr)) |
832 |
|
|
{ |
833 |
|
|
char v4ip[HOSTIPLEN]; |
834 |
|
|
struct sockaddr_in *v4 = (struct sockaddr_in*)addr; |
835 |
|
|
inetntop(AF_INET6, &v6->sin6_addr, v4ip, HOSTIPLEN); |
836 |
|
|
inet_pton(AF_INET, v4ip, &v4->sin_addr); |
837 |
|
|
addr->ss.ss_family = AF_INET; |
838 |
|
|
addr->ss_len = sizeof(struct sockaddr_in); |
839 |
|
|
} |
840 |
|
|
else |
841 |
|
|
addr->ss_len = sizeof(struct sockaddr_in6); |
842 |
|
|
} |
843 |
|
|
else |
844 |
|
|
addr->ss_len = sizeof(struct sockaddr_in); |
845 |
|
|
} |
846 |
|
|
#endif |