2 * IRC - Internet Relay Chat, ircd/s_auth.c
3 * Copyright (C) 1992 Darren Reed
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 1, or (at your option)
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include <sys/socket.h>
26 #include <sys/ioctl.h>
35 #include <arpa/inet.h>
53 #include "sprintf_irc.h"
60 * Flag the client to show that an attempt to contact the ident server on
61 * the client's host. The connect and subsequently the socket are all put
62 * into 'non-blocking' mode. Should the connect or any later phase of the
63 * identifing process fail, it is aborted and the user is given a username
66 void start_auth(aClient *cptr)
68 struct sockaddr_in sock;
71 Debug((DEBUG_NOTICE, "start_auth(%p) fd %d status %d",
72 cptr, cptr->fd, cptr->status));
75 cptr->authfd = socket(AF_INET, SOCK_STREAM, 0);
82 syslog(LOG_ERR, "Unable to create auth socket for %s:%m",
83 get_client_name(cptr, FALSE));
85 Debug((DEBUG_ERROR, "Unable to create auth socket for %s:%s",
86 get_client_name(cptr, FALSE), strerror(get_sockerr(cptr))));
92 if (cptr->authfd >= (MAXCONNECTIONS - 2))
99 set_non_blocking(cptr->authfd, cptr);
102 if (bind(cptr->authfd, (struct sockaddr *)&vserv, sizeof(vserv)) == -1)
104 report_error("binding auth stream socket %s: %s", cptr);
110 memcpy(&sock.sin_addr, &cptr->ip, sizeof(struct in_addr));
112 sock.sin_port = htons(113);
113 sock.sin_family = AF_INET;
116 if (connect(cptr->authfd, (struct sockaddr *)&sock,
117 sizeof(sock)) == -1 && errno != EINPROGRESS)
121 * No error report from this...
131 cptr->flags |= (FLAGS_WRAUTH | FLAGS_AUTH);
132 if (cptr->authfd > highest_fd)
133 highest_fd = cptr->authfd;
140 * Send the ident server a query giving "theirport , ourport".
141 * The write is only attempted *once* so it is deemed to be a fail if the
142 * entire write doesn't write all the data given. This shouldnt be a
143 * problem since the socket should have a write buffer far greater than
144 * this message to store it in should problems arise. -avalon
146 void send_authports(aClient *cptr)
148 struct sockaddr_in us, them;
152 Debug((DEBUG_NOTICE, "write_authports(%p) fd %d authfd %d stat %d",
153 cptr, cptr->fd, cptr->authfd, cptr->status));
154 tlen = ulen = sizeof(us);
155 if (getsockname(cptr->fd, (struct sockaddr *)&us, &ulen) ||
156 getpeername(cptr->fd, (struct sockaddr *)&them, &tlen))
159 syslog(LOG_ERR, "auth get{sock,peer}name error for %s:%m",
160 get_client_name(cptr, FALSE));
165 sprintf_irc(authbuf, "%u , %u\r\n", (unsigned int)ntohs(them.sin_port),
166 (unsigned int)ntohs(us.sin_port));
168 Debug((DEBUG_SEND, "sending [%s] to auth port %s.113",
169 authbuf, inetntoa(them.sin_addr)));
170 if (write(cptr->authfd, authbuf, strlen(authbuf)) != (int)strlen(authbuf))
175 if (cptr->authfd == highest_fd)
176 while (!loc_clients[highest_fd])
179 cptr->flags &= ~FLAGS_AUTH;
183 cptr->flags &= ~FLAGS_WRAUTH;
190 * read the reply (if any) from the ident server we connected to.
191 * The actual read processijng here is pretty weak - no handling of the reply
192 * if it is fragmented by IP.
194 void read_authports(aClient *cptr)
198 char ruser[USERLEN + 1], system[8];
199 unsigned short int remp = 0, locp = 0;
201 *system = *ruser = '\0';
202 Debug((DEBUG_NOTICE, "read_authports(%p) fd %d authfd %d stat %d",
203 cptr, cptr->fd, cptr->authfd, cptr->status));
205 * Nasty. Cant allow any other reads from client fd while we're
206 * waiting on the authfd to return a full valid string. Use the
207 * client's input buffer to buffer the authd reply.
208 * Oh. this is needed because an authd reply may come back in more
209 * than 1 read! -avalon
211 if ((len = read(cptr->authfd, cptr->buffer + cptr->count,
212 sizeof(cptr->buffer) - 1 - cptr->count)) >= 0)
215 cptr->buffer[cptr->count] = '\0';
218 cptr->lasttime = now;
219 if ((len > 0) && (cptr->count != (sizeof(cptr->buffer) - 1)) &&
220 (sscanf(cptr->buffer, "%hd , %hd : USERID : %*[^:]: %10s",
221 &remp, &locp, ruser) == 3))
223 s = strrchr(cptr->buffer, ':');
225 for (t = (strrchr(cptr->buffer, ':') + 1); *t; t++)
228 strncpy(system, t, sizeof(system) - 1);
229 system[sizeof(system) - 1] = 0;
230 for (t = ruser; *s && (t < ruser + sizeof(ruser)); s++)
231 if (!isSpace(*s) && *s != ':' && *s != '@')
234 Debug((DEBUG_INFO, "auth reply ok [%s] [%s]", system, ruser));
238 if (!strchr(cptr->buffer, '\n') && !strchr(cptr->buffer, '\r'))
240 Debug((DEBUG_ERROR, "local %d remote %d", locp, remp));
241 Debug((DEBUG_ERROR, "bad auth reply in [%s]", cptr->buffer));
245 if (cptr->authfd == highest_fd)
246 while (!loc_clients[highest_fd])
254 Debug((DEBUG_INFO, "ident reply: [%s]", cptr->buffer));
256 if (!locp || !remp || !*ruser)
262 strncpy(cptr->username, ruser, USERLEN);
263 cptr->username[USERLEN] = 0; /* This is the LA bug --Run */
264 if (strncmp(system, "OTHER", 5))
265 cptr->flags |= FLAGS_GOTID;
266 Debug((DEBUG_INFO, "got username [%s]", ruser));