1 |
adx |
30 |
/* |
2 |
michael |
2916 |
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
3 |
adx |
30 |
* |
4 |
michael |
2916 |
* Copyright (c) 1997-2014 ircd-hybrid development team |
5 |
adx |
30 |
* |
6 |
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* This program is free software; you can redistribute it and/or modify |
7 |
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* it under the terms of the GNU General Public License as published by |
8 |
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* the Free Software Foundation; either version 2 of the License, or |
9 |
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* (at your option) any later version. |
10 |
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* |
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* This program is distributed in the hope that it will be useful, |
12 |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 |
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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 |
17 |
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* along with this program; if not, write to the Free Software |
18 |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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* USA |
20 |
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*/ |
21 |
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|
22 |
michael |
3324 |
/*! \file auth.c |
23 |
michael |
2916 |
* \brief Functions for querying a users ident. |
24 |
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* \version $Id$ |
25 |
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*/ |
26 |
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27 |
adx |
30 |
/* |
28 |
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* Changes: |
29 |
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* July 6, 1999 - Rewrote most of the code here. When a client connects |
30 |
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* to the server and passes initial socket validation checks, it |
31 |
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* is owned by this module (auth) which returns it to the rest of the |
32 |
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* server when dns and auth queries are finished. Until the client is |
33 |
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* released, the server does not know it exists and does not process |
34 |
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* any messages from it. |
35 |
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* --Bleep Thomas Helvey <tomh@inxpress.net> |
36 |
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*/ |
37 |
michael |
1309 |
|
38 |
adx |
30 |
#include "stdinc.h" |
39 |
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#include "list.h" |
40 |
michael |
1011 |
#include "ircd_defs.h" |
41 |
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#include "fdlist.h" |
42 |
michael |
3324 |
#include "auth.h" |
43 |
michael |
1309 |
#include "conf.h" |
44 |
adx |
30 |
#include "client.h" |
45 |
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#include "event.h" |
46 |
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#include "irc_string.h" |
47 |
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#include "ircd.h" |
48 |
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#include "packet.h" |
49 |
michael |
3322 |
#include "res.h" |
50 |
adx |
30 |
#include "s_bsd.h" |
51 |
michael |
1309 |
#include "log.h" |
52 |
adx |
30 |
#include "send.h" |
53 |
michael |
1654 |
#include "mempool.h" |
54 |
adx |
30 |
|
55 |
michael |
1011 |
|
56 |
michael |
3564 |
static const char *const HeaderMessages[] = |
57 |
michael |
2916 |
{ |
58 |
michael |
3168 |
":*** Looking up your hostname...", |
59 |
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":*** Found your hostname", |
60 |
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":*** Couldn't look up your hostname", |
61 |
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":*** Checking Ident", |
62 |
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":*** Got Ident response", |
63 |
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":*** No Ident response", |
64 |
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":*** Your forward and reverse DNS do not match, ignoring hostname.", |
65 |
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":*** Your hostname is too long, ignoring hostname" |
66 |
adx |
30 |
}; |
67 |
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68 |
michael |
2916 |
enum |
69 |
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{ |
70 |
adx |
30 |
REPORT_DO_DNS, |
71 |
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REPORT_FIN_DNS, |
72 |
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REPORT_FAIL_DNS, |
73 |
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REPORT_DO_ID, |
74 |
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REPORT_FIN_ID, |
75 |
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REPORT_FAIL_ID, |
76 |
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REPORT_IP_MISMATCH, |
77 |
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REPORT_HOST_TOOLONG |
78 |
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}; |
79 |
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|
80 |
michael |
3168 |
#define sendheader(c, i) sendto_one_notice((c), &me, HeaderMessages[(i)]) |
81 |
adx |
30 |
|
82 |
michael |
992 |
static dlink_list auth_doing_list = { NULL, NULL, 0 }; |
83 |
adx |
30 |
|
84 |
michael |
4095 |
static void timeout_auth_queries_event(void *); |
85 |
adx |
30 |
|
86 |
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static PF read_auth_reply; |
87 |
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static CNCB auth_connect_callback; |
88 |
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|
89 |
michael |
1798 |
/* auth_init |
90 |
adx |
30 |
* |
91 |
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* Initialise the auth code |
92 |
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*/ |
93 |
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void |
94 |
michael |
1798 |
auth_init(void) |
95 |
adx |
30 |
{ |
96 |
michael |
4095 |
static struct event timeout_auth_queries = |
97 |
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{ |
98 |
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.name = "timeout_auth_queries_event", |
99 |
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.handler = timeout_auth_queries_event, |
100 |
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.when = 1 |
101 |
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}; |
102 |
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103 |
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event_add(&timeout_auth_queries, NULL); |
104 |
adx |
30 |
} |
105 |
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106 |
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/* |
107 |
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* make_auth_request - allocate a new auth request |
108 |
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*/ |
109 |
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static struct AuthRequest * |
110 |
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make_auth_request(struct Client *client) |
111 |
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{ |
112 |
michael |
2181 |
struct AuthRequest *request = &client->localClient->auth; |
113 |
adx |
30 |
|
114 |
michael |
1654 |
memset(request, 0, sizeof(*request)); |
115 |
adx |
30 |
|
116 |
michael |
2181 |
request->client = client; |
117 |
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request->timeout = CurrentTime + CONNECTTIMEOUT; |
118 |
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|
119 |
michael |
650 |
return request; |
120 |
adx |
30 |
} |
121 |
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122 |
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/* |
123 |
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* release_auth_client - release auth client from auth system |
124 |
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* this adds the client into the local client lists so it can be read by |
125 |
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* the main io processing loop |
126 |
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*/ |
127 |
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void |
128 |
michael |
992 |
release_auth_client(struct AuthRequest *auth) |
129 |
adx |
30 |
{ |
130 |
michael |
992 |
struct Client *client = auth->client; |
131 |
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132 |
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if (IsDoingAuth(auth) || IsDNSPending(auth)) |
133 |
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return; |
134 |
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135 |
michael |
2929 |
if (IsInAuth(auth)) |
136 |
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{ |
137 |
michael |
2181 |
dlinkDelete(&auth->node, &auth_doing_list); |
138 |
michael |
2929 |
ClearInAuth(auth); |
139 |
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} |
140 |
michael |
992 |
|
141 |
adx |
30 |
/* |
142 |
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* When a client has auth'ed, we want to start reading what it sends |
143 |
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* us. This is what read_packet() does. |
144 |
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* -- adrian |
145 |
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*/ |
146 |
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client->localClient->allow_read = MAX_FLOOD; |
147 |
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comm_setflush(&client->localClient->fd, 1000, flood_recalc, client); |
148 |
michael |
650 |
|
149 |
michael |
992 |
dlinkAdd(client, &client->node, &global_client_list); |
150 |
michael |
650 |
|
151 |
michael |
1241 |
client->localClient->since = CurrentTime; |
152 |
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client->localClient->lasttime = CurrentTime; |
153 |
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client->localClient->firsttime = CurrentTime; |
154 |
michael |
664 |
client->flags |= FLAGS_FINISHED_AUTH; |
155 |
michael |
650 |
|
156 |
adx |
30 |
read_packet(&client->localClient->fd, client); |
157 |
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} |
158 |
michael |
2916 |
|
159 |
adx |
30 |
/* |
160 |
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* auth_dns_callback - called when resolver query finishes |
161 |
michael |
998 |
* if the query resulted in a successful search, name will contain |
162 |
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* a non-NULL pointer, otherwise name will be NULL. |
163 |
adx |
30 |
* set the client on it's way to a connection completion, regardless |
164 |
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* of success of failure |
165 |
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*/ |
166 |
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static void |
167 |
michael |
992 |
auth_dns_callback(void *vptr, const struct irc_ssaddr *addr, const char *name) |
168 |
adx |
30 |
{ |
169 |
michael |
992 |
struct AuthRequest *auth = vptr; |
170 |
adx |
30 |
|
171 |
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ClearDNSPending(auth); |
172 |
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|
173 |
michael |
3250 |
if (name) |
174 |
adx |
30 |
{ |
175 |
michael |
992 |
const struct sockaddr_in *v4, *v4dns; |
176 |
adx |
30 |
#ifdef IPV6 |
177 |
michael |
992 |
const struct sockaddr_in6 *v6, *v6dns; |
178 |
adx |
30 |
#endif |
179 |
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int good = 1; |
180 |
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181 |
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#ifdef IPV6 |
182 |
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if (auth->client->localClient->ip.ss.ss_family == AF_INET6) |
183 |
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{ |
184 |
michael |
992 |
v6 = (const struct sockaddr_in6 *)&auth->client->localClient->ip; |
185 |
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v6dns = (const struct sockaddr_in6 *)addr; |
186 |
michael |
3250 |
|
187 |
adx |
30 |
if (memcmp(&v6->sin6_addr, &v6dns->sin6_addr, sizeof(struct in6_addr)) != 0) |
188 |
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{ |
189 |
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sendheader(auth->client, REPORT_IP_MISMATCH); |
190 |
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good = 0; |
191 |
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} |
192 |
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} |
193 |
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else |
194 |
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#endif |
195 |
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{ |
196 |
michael |
992 |
v4 = (const struct sockaddr_in *)&auth->client->localClient->ip; |
197 |
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v4dns = (const struct sockaddr_in *)addr; |
198 |
michael |
3250 |
|
199 |
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if (v4->sin_addr.s_addr != v4dns->sin_addr.s_addr) |
200 |
adx |
30 |
{ |
201 |
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sendheader(auth->client, REPORT_IP_MISMATCH); |
202 |
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good = 0; |
203 |
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} |
204 |
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} |
205 |
michael |
3250 |
|
206 |
michael |
992 |
if (good && strlen(name) <= HOSTLEN) |
207 |
adx |
30 |
{ |
208 |
michael |
992 |
strlcpy(auth->client->host, name, |
209 |
michael |
2916 |
sizeof(auth->client->host)); |
210 |
adx |
30 |
sendheader(auth->client, REPORT_FIN_DNS); |
211 |
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} |
212 |
michael |
992 |
else if (strlen(name) > HOSTLEN) |
213 |
adx |
30 |
sendheader(auth->client, REPORT_HOST_TOOLONG); |
214 |
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} |
215 |
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else |
216 |
michael |
992 |
sendheader(auth->client, REPORT_FAIL_DNS); |
217 |
adx |
30 |
|
218 |
michael |
992 |
release_auth_client(auth); |
219 |
adx |
30 |
} |
220 |
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|
221 |
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/* |
222 |
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* authsenderr - handle auth send errors |
223 |
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*/ |
224 |
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static void |
225 |
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auth_error(struct AuthRequest *auth) |
226 |
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{ |
227 |
michael |
896 |
++ServerStats.is_abad; |
228 |
adx |
30 |
|
229 |
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fd_close(&auth->fd); |
230 |
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231 |
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ClearAuth(auth); |
232 |
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233 |
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sendheader(auth->client, REPORT_FAIL_ID); |
234 |
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235 |
michael |
992 |
release_auth_client(auth); |
236 |
adx |
30 |
} |
237 |
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|
238 |
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/* |
239 |
michael |
2916 |
* start_auth_query - Flag the client to show that an attempt to |
240 |
adx |
30 |
* contact the ident server on |
241 |
|
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* the client's host. The connect and subsequently the socket are all put |
242 |
|
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* into 'non-blocking' mode. Should the connect or any later phase of the |
243 |
|
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* identifing process fail, it is aborted and the user is given a username |
244 |
|
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* of "unknown". |
245 |
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*/ |
246 |
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static int |
247 |
|
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start_auth_query(struct AuthRequest *auth) |
248 |
|
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{ |
249 |
|
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struct irc_ssaddr localaddr; |
250 |
|
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socklen_t locallen = sizeof(struct irc_ssaddr); |
251 |
|
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#ifdef IPV6 |
252 |
|
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struct sockaddr_in6 *v6; |
253 |
|
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#else |
254 |
|
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struct sockaddr_in *v4; |
255 |
|
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#endif |
256 |
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|
257 |
|
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/* open a socket of the same type as the client socket */ |
258 |
|
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if (comm_open(&auth->fd, auth->client->localClient->ip.ss.ss_family, |
259 |
|
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SOCK_STREAM, 0, "ident") == -1) |
260 |
|
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{ |
261 |
michael |
2916 |
report_error(L_ALL, "creating auth stream socket %s:%s", |
262 |
|
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get_client_name(auth->client, SHOW_IP), errno); |
263 |
michael |
1247 |
ilog(LOG_TYPE_IRCD, "Unable to create auth socket for %s", |
264 |
adx |
30 |
get_client_name(auth->client, SHOW_IP)); |
265 |
michael |
896 |
++ServerStats.is_abad; |
266 |
adx |
30 |
return 0; |
267 |
|
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} |
268 |
|
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|
269 |
|
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sendheader(auth->client, REPORT_DO_ID); |
270 |
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|
271 |
michael |
2916 |
/* |
272 |
adx |
30 |
* get the local address of the client and bind to that to |
273 |
|
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* make the auth request. This used to be done only for |
274 |
|
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* ifdef VIRTUAL_HOST, but needs to be done for all clients |
275 |
|
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* since the ident request must originate from that same address-- |
276 |
|
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* and machines with multiple IP addresses are common now |
277 |
|
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*/ |
278 |
|
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memset(&localaddr, 0, locallen); |
279 |
|
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getsockname(auth->client->localClient->fd.fd, (struct sockaddr*)&localaddr, |
280 |
|
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&locallen); |
281 |
|
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|
282 |
|
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#ifdef IPV6 |
283 |
|
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remove_ipv6_mapping(&localaddr); |
284 |
|
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v6 = (struct sockaddr_in6 *)&localaddr; |
285 |
|
|
v6->sin6_port = htons(0); |
286 |
|
|
#else |
287 |
|
|
localaddr.ss_len = locallen; |
288 |
|
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v4 = (struct sockaddr_in *)&localaddr; |
289 |
|
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v4->sin_port = htons(0); |
290 |
|
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#endif |
291 |
|
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localaddr.ss_port = htons(0); |
292 |
|
|
|
293 |
michael |
2916 |
comm_connect_tcp(&auth->fd, auth->client->sockhost, 113, |
294 |
|
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(struct sockaddr *)&localaddr, localaddr.ss_len, auth_connect_callback, |
295 |
|
|
auth, auth->client->localClient->ip.ss.ss_family, |
296 |
adx |
30 |
GlobalSetOptions.ident_timeout); |
297 |
|
|
return 1; /* We suceed here for now */ |
298 |
|
|
} |
299 |
|
|
|
300 |
|
|
/* |
301 |
|
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* GetValidIdent - parse ident query reply from identd server |
302 |
michael |
2916 |
* |
303 |
adx |
30 |
* Inputs - pointer to ident buf |
304 |
|
|
* Output - NULL if no valid ident found, otherwise pointer to name |
305 |
|
|
* Side effects - |
306 |
|
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*/ |
307 |
|
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/* |
308 |
|
|
* A few questions have been asked about this mess, obviously |
309 |
|
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* it should have been commented better the first time. |
310 |
|
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* The original idea was to remove all references to libc from ircd-hybrid. |
311 |
|
|
* Instead of having to write a replacement for sscanf(), I did a |
312 |
|
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* rather gruseome parser here so we could remove this function call. |
313 |
|
|
* Note, that I had also removed a few floating point printfs as well (though |
314 |
|
|
* now we are still stuck with a few...) |
315 |
|
|
* Remember, we have a replacement ircd sprintf, we have bleeps fputs lib |
316 |
|
|
* it would have been nice to remove some unneeded code. |
317 |
|
|
* Oh well. If we don't remove libc stuff totally, then it would be |
318 |
|
|
* far cleaner to use sscanf() |
319 |
|
|
* |
320 |
|
|
* - Dianora |
321 |
|
|
*/ |
322 |
|
|
static char * |
323 |
|
|
GetValidIdent(char *buf) |
324 |
|
|
{ |
325 |
|
|
int remp = 0; |
326 |
|
|
int locp = 0; |
327 |
|
|
char* colon1Ptr; |
328 |
|
|
char* colon2Ptr; |
329 |
|
|
char* colon3Ptr; |
330 |
|
|
char* commaPtr; |
331 |
|
|
char* remotePortString; |
332 |
|
|
|
333 |
|
|
/* All this to get rid of a sscanf() fun. */ |
334 |
|
|
remotePortString = buf; |
335 |
michael |
2916 |
|
336 |
adx |
30 |
if ((colon1Ptr = strchr(remotePortString,':')) == NULL) |
337 |
|
|
return 0; |
338 |
|
|
*colon1Ptr = '\0'; |
339 |
|
|
colon1Ptr++; |
340 |
|
|
|
341 |
|
|
if ((colon2Ptr = strchr(colon1Ptr,':')) == NULL) |
342 |
|
|
return 0; |
343 |
|
|
*colon2Ptr = '\0'; |
344 |
|
|
colon2Ptr++; |
345 |
michael |
2916 |
|
346 |
adx |
30 |
if ((commaPtr = strchr(remotePortString, ',')) == NULL) |
347 |
|
|
return 0; |
348 |
|
|
*commaPtr = '\0'; |
349 |
|
|
commaPtr++; |
350 |
|
|
|
351 |
|
|
if ((remp = atoi(remotePortString)) == 0) |
352 |
|
|
return 0; |
353 |
michael |
2916 |
|
354 |
adx |
30 |
if ((locp = atoi(commaPtr)) == 0) |
355 |
|
|
return 0; |
356 |
|
|
|
357 |
|
|
/* look for USERID bordered by first pair of colons */ |
358 |
|
|
if (strstr(colon1Ptr, "USERID") == NULL) |
359 |
|
|
return 0; |
360 |
|
|
|
361 |
|
|
if ((colon3Ptr = strchr(colon2Ptr,':')) == NULL) |
362 |
|
|
return 0; |
363 |
|
|
*colon3Ptr = '\0'; |
364 |
|
|
colon3Ptr++; |
365 |
|
|
return (colon3Ptr); |
366 |
|
|
} |
367 |
|
|
|
368 |
|
|
/* |
369 |
michael |
2916 |
* start_auth |
370 |
adx |
30 |
* |
371 |
|
|
* inputs - pointer to client to auth |
372 |
|
|
* output - NONE |
373 |
|
|
* side effects - starts auth (identd) and dns queries for a client |
374 |
|
|
*/ |
375 |
michael |
2916 |
void |
376 |
michael |
3250 |
start_auth(struct Client *client_p) |
377 |
adx |
30 |
{ |
378 |
|
|
struct AuthRequest *auth = NULL; |
379 |
|
|
|
380 |
michael |
3250 |
assert(client_p); |
381 |
adx |
30 |
|
382 |
michael |
3250 |
auth = make_auth_request(client_p); |
383 |
michael |
2929 |
SetInAuth(auth); |
384 |
|
|
dlinkAddTail(auth, &auth->node, &auth_doing_list); |
385 |
adx |
30 |
|
386 |
michael |
3250 |
sendheader(client_p, REPORT_DO_DNS); |
387 |
adx |
30 |
|
388 |
michael |
992 |
SetDNSPending(auth); |
389 |
|
|
|
390 |
adx |
30 |
if (ConfigFileEntry.disable_auth == 0) |
391 |
michael |
992 |
{ |
392 |
|
|
SetDoingAuth(auth); |
393 |
adx |
30 |
start_auth_query(auth); |
394 |
michael |
992 |
} |
395 |
adx |
30 |
|
396 |
michael |
3250 |
gethost_byaddr(auth_dns_callback, auth, &client_p->localClient->ip); |
397 |
adx |
30 |
} |
398 |
|
|
|
399 |
|
|
/* |
400 |
|
|
* timeout_auth_queries - timeout resolver and identd requests |
401 |
|
|
* allow clients through if requests failed |
402 |
|
|
*/ |
403 |
|
|
static void |
404 |
|
|
timeout_auth_queries_event(void *notused) |
405 |
|
|
{ |
406 |
michael |
3250 |
dlink_node *ptr = NULL, *ptr_next = NULL; |
407 |
adx |
30 |
|
408 |
michael |
3250 |
DLINK_FOREACH_SAFE(ptr, ptr_next, auth_doing_list.head) |
409 |
adx |
30 |
{ |
410 |
michael |
992 |
struct AuthRequest *auth = ptr->data; |
411 |
adx |
30 |
|
412 |
michael |
992 |
if (auth->timeout > CurrentTime) |
413 |
michael |
2929 |
break; |
414 |
adx |
30 |
|
415 |
michael |
992 |
if (IsDoingAuth(auth)) |
416 |
michael |
2916 |
{ |
417 |
michael |
896 |
++ServerStats.is_abad; |
418 |
michael |
1000 |
fd_close(&auth->fd); |
419 |
michael |
998 |
ClearAuth(auth); |
420 |
adx |
30 |
sendheader(auth->client, REPORT_FAIL_ID); |
421 |
michael |
992 |
} |
422 |
adx |
30 |
|
423 |
michael |
992 |
if (IsDNSPending(auth)) |
424 |
|
|
{ |
425 |
|
|
delete_resolver_queries(auth); |
426 |
michael |
998 |
ClearDNSPending(auth); |
427 |
michael |
992 |
sendheader(auth->client, REPORT_FAIL_DNS); |
428 |
|
|
} |
429 |
adx |
30 |
|
430 |
michael |
1247 |
ilog(LOG_TYPE_IRCD, "DNS/AUTH timeout %s", |
431 |
michael |
992 |
get_client_name(auth->client, SHOW_IP)); |
432 |
|
|
release_auth_client(auth); |
433 |
adx |
30 |
} |
434 |
|
|
} |
435 |
|
|
|
436 |
|
|
/* |
437 |
|
|
* auth_connect_callback() - deal with the result of comm_connect_tcp() |
438 |
|
|
* |
439 |
|
|
* If the connection failed, we simply close the auth fd and report |
440 |
|
|
* a failure. If the connection suceeded send the ident server a query |
441 |
|
|
* giving "theirport , ourport". The write is only attempted *once* so |
442 |
|
|
* it is deemed to be a fail if the entire write doesn't write all the |
443 |
|
|
* data given. This shouldnt be a problem since the socket should have |
444 |
|
|
* a write buffer far greater than this message to store it in should |
445 |
|
|
* problems arise. -avalon |
446 |
|
|
*/ |
447 |
|
|
static void |
448 |
|
|
auth_connect_callback(fde_t *fd, int error, void *data) |
449 |
|
|
{ |
450 |
|
|
struct AuthRequest *auth = data; |
451 |
|
|
struct irc_ssaddr us; |
452 |
|
|
struct irc_ssaddr them; |
453 |
|
|
char authbuf[32]; |
454 |
|
|
socklen_t ulen = sizeof(struct irc_ssaddr); |
455 |
|
|
socklen_t tlen = sizeof(struct irc_ssaddr); |
456 |
michael |
1032 |
uint16_t uport, tport; |
457 |
adx |
30 |
#ifdef IPV6 |
458 |
|
|
struct sockaddr_in6 *v6; |
459 |
|
|
#else |
460 |
|
|
struct sockaddr_in *v4; |
461 |
|
|
#endif |
462 |
|
|
|
463 |
|
|
if (error != COMM_OK) |
464 |
|
|
{ |
465 |
|
|
auth_error(auth); |
466 |
|
|
return; |
467 |
|
|
} |
468 |
|
|
|
469 |
michael |
3250 |
if (getsockname(auth->client->localClient->fd.fd, (struct sockaddr *)&us, &ulen) || |
470 |
|
|
getpeername(auth->client->localClient->fd.fd, (struct sockaddr *)&them, &tlen)) |
471 |
adx |
30 |
{ |
472 |
michael |
1247 |
ilog(LOG_TYPE_IRCD, "auth get{sock,peer}name error for %s", |
473 |
michael |
3250 |
get_client_name(auth->client, SHOW_IP)); |
474 |
adx |
30 |
auth_error(auth); |
475 |
|
|
return; |
476 |
|
|
} |
477 |
|
|
|
478 |
|
|
#ifdef IPV6 |
479 |
|
|
v6 = (struct sockaddr_in6 *)&us; |
480 |
|
|
uport = ntohs(v6->sin6_port); |
481 |
|
|
v6 = (struct sockaddr_in6 *)&them; |
482 |
|
|
tport = ntohs(v6->sin6_port); |
483 |
|
|
remove_ipv6_mapping(&us); |
484 |
|
|
remove_ipv6_mapping(&them); |
485 |
|
|
#else |
486 |
|
|
v4 = (struct sockaddr_in *)&us; |
487 |
|
|
uport = ntohs(v4->sin_port); |
488 |
|
|
v4 = (struct sockaddr_in *)&them; |
489 |
|
|
tport = ntohs(v4->sin_port); |
490 |
|
|
us.ss_len = ulen; |
491 |
|
|
them.ss_len = tlen; |
492 |
|
|
#endif |
493 |
michael |
2916 |
|
494 |
michael |
1124 |
snprintf(authbuf, sizeof(authbuf), "%u , %u\r\n", tport, uport); |
495 |
adx |
30 |
|
496 |
|
|
if (send(fd->fd, authbuf, strlen(authbuf), 0) == -1) |
497 |
|
|
{ |
498 |
|
|
auth_error(auth); |
499 |
|
|
return; |
500 |
|
|
} |
501 |
michael |
696 |
|
502 |
adx |
30 |
read_auth_reply(&auth->fd, auth); |
503 |
|
|
} |
504 |
|
|
|
505 |
|
|
/* |
506 |
michael |
2916 |
* read_auth_reply - read the reply (if any) from the ident server |
507 |
adx |
30 |
* we connected to. |
508 |
|
|
* We only give it one shot, if the reply isn't good the first time |
509 |
|
|
* fail the authentication entirely. --Bleep |
510 |
|
|
*/ |
511 |
|
|
#define AUTH_BUFSIZ 128 |
512 |
|
|
|
513 |
|
|
static void |
514 |
|
|
read_auth_reply(fde_t *fd, void *data) |
515 |
|
|
{ |
516 |
|
|
struct AuthRequest *auth = data; |
517 |
|
|
char *s = NULL; |
518 |
|
|
char *t = NULL; |
519 |
|
|
int len; |
520 |
|
|
int count; |
521 |
|
|
char buf[AUTH_BUFSIZ + 1]; /* buffer to read auth reply into */ |
522 |
|
|
|
523 |
nenolod |
397 |
/* Why? |
524 |
|
|
* Well, recv() on many POSIX systems is a per-packet operation, |
525 |
|
|
* and we do not necessarily want this, because on lowspec machines, |
526 |
|
|
* the ident response may come back fragmented, thus resulting in an |
527 |
|
|
* invalid ident response, even if the ident response was really OK. |
528 |
|
|
* |
529 |
|
|
* So PLEASE do not change this code to recv without being aware of the |
530 |
|
|
* consequences. |
531 |
|
|
* |
532 |
|
|
* --nenolod |
533 |
|
|
*/ |
534 |
|
|
len = read(fd->fd, buf, AUTH_BUFSIZ); |
535 |
michael |
1001 |
|
536 |
adx |
30 |
if (len < 0) |
537 |
|
|
{ |
538 |
|
|
if (ignoreErrno(errno)) |
539 |
|
|
comm_setselect(fd, COMM_SELECT_READ, read_auth_reply, auth, 0); |
540 |
|
|
else |
541 |
|
|
auth_error(auth); |
542 |
|
|
return; |
543 |
|
|
} |
544 |
|
|
|
545 |
|
|
if (len > 0) |
546 |
|
|
{ |
547 |
|
|
buf[len] = '\0'; |
548 |
|
|
|
549 |
|
|
if ((s = GetValidIdent(buf))) |
550 |
|
|
{ |
551 |
|
|
t = auth->client->username; |
552 |
|
|
|
553 |
|
|
while (*s == '~' || *s == '^') |
554 |
|
|
s++; |
555 |
|
|
|
556 |
|
|
for (count = USERLEN; *s && count; s++) |
557 |
|
|
{ |
558 |
|
|
if (*s == '@') |
559 |
|
|
break; |
560 |
|
|
if (!IsSpace(*s) && *s != ':' && *s != '[') |
561 |
|
|
{ |
562 |
|
|
*t++ = *s; |
563 |
|
|
count--; |
564 |
|
|
} |
565 |
|
|
} |
566 |
|
|
|
567 |
|
|
*t = '\0'; |
568 |
|
|
} |
569 |
|
|
} |
570 |
|
|
|
571 |
|
|
fd_close(fd); |
572 |
|
|
|
573 |
|
|
ClearAuth(auth); |
574 |
|
|
|
575 |
|
|
if (s == NULL) |
576 |
|
|
{ |
577 |
|
|
sendheader(auth->client, REPORT_FAIL_ID); |
578 |
michael |
896 |
++ServerStats.is_abad; |
579 |
adx |
30 |
} |
580 |
|
|
else |
581 |
|
|
{ |
582 |
|
|
sendheader(auth->client, REPORT_FIN_ID); |
583 |
michael |
896 |
++ServerStats.is_asuc; |
584 |
adx |
30 |
SetGotId(auth->client); |
585 |
|
|
} |
586 |
|
|
|
587 |
michael |
992 |
release_auth_client(auth); |
588 |
adx |
30 |
} |
589 |
|
|
|
590 |
|
|
/* |
591 |
|
|
* delete_auth() |
592 |
|
|
*/ |
593 |
michael |
2916 |
void |
594 |
michael |
992 |
delete_auth(struct AuthRequest *auth) |
595 |
adx |
30 |
{ |
596 |
michael |
992 |
if (IsDNSPending(auth)) |
597 |
|
|
delete_resolver_queries(auth); |
598 |
adx |
30 |
|
599 |
michael |
1000 |
if (IsDoingAuth(auth)) |
600 |
|
|
fd_close(&auth->fd); |
601 |
|
|
|
602 |
michael |
2929 |
if (IsInAuth(auth)) |
603 |
|
|
{ |
604 |
michael |
2181 |
dlinkDelete(&auth->node, &auth_doing_list); |
605 |
michael |
2929 |
ClearInAuth(auth); |
606 |
|
|
} |
607 |
adx |
30 |
} |