1 |
adx |
30 |
/* |
2 |
michael |
2916 |
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
3 |
adx |
30 |
* |
4 |
michael |
8752 |
* Copyright (c) 1997-2019 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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* |
11 |
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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. |
15 |
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* |
16 |
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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 |
michael |
4565 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 |
19 |
adx |
30 |
* USA |
20 |
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*/ |
21 |
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|
22 |
michael |
2916 |
/*! \file s_bsd.c |
23 |
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* \brief Network functions. |
24 |
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* \version $Id$ |
25 |
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*/ |
26 |
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27 |
adx |
30 |
#include "stdinc.h" |
28 |
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#include <netinet/in_systm.h> |
29 |
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#include <netinet/ip.h> |
30 |
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#include <netinet/tcp.h> |
31 |
michael |
1011 |
#include "list.h" |
32 |
adx |
30 |
#include "fdlist.h" |
33 |
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#include "s_bsd.h" |
34 |
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#include "client.h" |
35 |
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#include "dbuf.h" |
36 |
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#include "event.h" |
37 |
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#include "irc_string.h" |
38 |
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#include "ircd.h" |
39 |
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#include "listener.h" |
40 |
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#include "numeric.h" |
41 |
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#include "packet.h" |
42 |
michael |
3322 |
#include "res.h" |
43 |
adx |
30 |
#include "restart.h" |
44 |
michael |
1309 |
#include "conf.h" |
45 |
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#include "log.h" |
46 |
michael |
3347 |
#include "server.h" |
47 |
adx |
30 |
#include "send.h" |
48 |
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#include "memory.h" |
49 |
michael |
3347 |
#include "user.h" |
50 |
adx |
30 |
|
51 |
michael |
3274 |
|
52 |
michael |
5887 |
static const char *const comm_err_str[] = |
53 |
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{ |
54 |
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[COMM_OK] = "Comm OK", |
55 |
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[COMM_ERR_BIND] = "Error during bind()", |
56 |
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[COMM_ERR_TIMEOUT] = "connect timeout", |
57 |
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[COMM_ERR_CONNECT] = "Error during connect()", |
58 |
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[COMM_ERROR] = "Comm Error" |
59 |
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}; |
60 |
adx |
30 |
|
61 |
michael |
1013 |
static void comm_connect_callback(fde_t *, int); |
62 |
michael |
4461 |
static void comm_connect_timeout(fde_t *, void *); |
63 |
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static void comm_connect_tryconnect(fde_t *, void *); |
64 |
adx |
30 |
|
65 |
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|
66 |
michael |
8414 |
/* comm_get_sockerr - get the error value from the socket or the current errno |
67 |
adx |
30 |
* |
68 |
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* Get the *real* error from the socket (well try to anyway..). |
69 |
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* This may only work when SO_DEBUG is enabled but its worth the |
70 |
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* gamble anyway. |
71 |
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*/ |
72 |
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int |
73 |
michael |
8826 |
comm_get_sockerr(fde_t *F) |
74 |
adx |
30 |
{ |
75 |
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int errtmp = errno; |
76 |
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#ifdef SO_ERROR |
77 |
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int err = 0; |
78 |
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socklen_t len = sizeof(err); |
79 |
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80 |
michael |
8826 |
assert(F); |
81 |
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assert(F->flags.open == true); |
82 |
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83 |
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if (getsockopt(F->fd, SOL_SOCKET, SO_ERROR, &err, &len) == 0) |
84 |
adx |
30 |
{ |
85 |
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if (err) |
86 |
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errtmp = err; |
87 |
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} |
88 |
michael |
8557 |
|
89 |
adx |
30 |
errno = errtmp; |
90 |
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#endif |
91 |
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return errtmp; |
92 |
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} |
93 |
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94 |
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/* |
95 |
michael |
2916 |
* report_error - report an error from an errno. |
96 |
adx |
30 |
* Record error to log and also send a copy to all *LOCAL* opers online. |
97 |
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* |
98 |
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* text is a *format* string for outputing error. It must |
99 |
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* contain only two '%s', the first will be replaced |
100 |
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* by the sockhost from the client_p, and the latter will |
101 |
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* be taken from sys_errlist[errno]. |
102 |
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* |
103 |
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* client_p if not NULL, is the *LOCAL* client associated with |
104 |
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* the error. |
105 |
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* |
106 |
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* Cannot use perror() within daemon. stderr is closed in |
107 |
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* ircd and cannot be used. And, worse yet, it might have |
108 |
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* been reassigned to a normal connection... |
109 |
michael |
2916 |
* |
110 |
adx |
30 |
* Actually stderr is still there IFF ircd was run with -s --Rodder |
111 |
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*/ |
112 |
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void |
113 |
michael |
8431 |
report_error(int level, const char *text, const char *who, int error) |
114 |
adx |
30 |
{ |
115 |
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who = (who) ? who : ""; |
116 |
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|
117 |
michael |
1618 |
sendto_realops_flags(UMODE_DEBUG, level, SEND_NOTICE, |
118 |
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text, who, strerror(error)); |
119 |
michael |
1247 |
ilog(LOG_TYPE_IRCD, text, who, strerror(error)); |
120 |
adx |
30 |
} |
121 |
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122 |
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/* |
123 |
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* setup_socket() |
124 |
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* |
125 |
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* Set the socket non-blocking, and other wonderful bits. |
126 |
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*/ |
127 |
michael |
2632 |
static void |
128 |
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setup_socket(int fd) |
129 |
adx |
30 |
{ |
130 |
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int opt = 1; |
131 |
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|
132 |
michael |
967 |
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt)); |
133 |
adx |
30 |
|
134 |
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#ifdef IPTOS_LOWDELAY |
135 |
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opt = IPTOS_LOWDELAY; |
136 |
michael |
967 |
setsockopt(fd, IPPROTO_IP, IP_TOS, &opt, sizeof(opt)); |
137 |
adx |
30 |
#endif |
138 |
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139 |
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fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK); |
140 |
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} |
141 |
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|
142 |
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/* |
143 |
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* ssl_handshake - let OpenSSL initialize the protocol. Register for |
144 |
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* read/write events if necessary. |
145 |
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*/ |
146 |
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static void |
147 |
michael |
8339 |
ssl_handshake(fde_t *F, void *data) |
148 |
adx |
30 |
{ |
149 |
michael |
4461 |
struct Client *client_p = data; |
150 |
adx |
30 |
|
151 |
michael |
8339 |
assert(client_p); |
152 |
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assert(client_p->connection); |
153 |
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assert(client_p->connection->fd); |
154 |
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assert(client_p->connection->fd == F); |
155 |
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156 |
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tls_handshake_status_t ret = tls_handshake(&F->ssl, TLS_ROLE_SERVER, NULL); |
157 |
michael |
7105 |
if (ret != TLS_HANDSHAKE_DONE) |
158 |
michael |
2463 |
{ |
159 |
michael |
8943 |
if ((event_base->time.sec_monotonic - client_p->connection->created_monotonic) > TLS_HANDSHAKE_TIMEOUT) |
160 |
michael |
2725 |
{ |
161 |
michael |
7105 |
exit_client(client_p, "Timeout during TLS handshake"); |
162 |
michael |
2725 |
return; |
163 |
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} |
164 |
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|
165 |
michael |
7105 |
switch (ret) |
166 |
michael |
2463 |
{ |
167 |
michael |
7105 |
case TLS_HANDSHAKE_WANT_WRITE: |
168 |
michael |
8943 |
comm_setselect(F, COMM_SELECT_WRITE, ssl_handshake, client_p, TLS_HANDSHAKE_TIMEOUT); |
169 |
michael |
2463 |
return; |
170 |
michael |
7105 |
case TLS_HANDSHAKE_WANT_READ: |
171 |
michael |
8943 |
comm_setselect(F, COMM_SELECT_READ, ssl_handshake, client_p, TLS_HANDSHAKE_TIMEOUT); |
172 |
michael |
2463 |
return; |
173 |
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default: |
174 |
michael |
7105 |
exit_client(client_p, "Error during TLS handshake"); |
175 |
michael |
2916 |
return; |
176 |
michael |
2463 |
} |
177 |
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} |
178 |
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|
179 |
michael |
8339 |
comm_settimeout(F, 0, NULL, NULL); |
180 |
michael |
2733 |
|
181 |
michael |
8688 |
if (tls_verify_cert(&F->ssl, ConfigServerInfo.message_digest_algorithm, &client_p->certfp) == false) |
182 |
michael |
7142 |
ilog(LOG_TYPE_IRCD, "Client %s!%s@%s gave bad TLS client certificate", |
183 |
|
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client_p->name, client_p->username, client_p->host); |
184 |
michael |
2228 |
|
185 |
michael |
7955 |
auth_start(client_p); |
186 |
adx |
30 |
} |
187 |
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|
188 |
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/* |
189 |
michael |
2916 |
* add_connection - creates a client which has just connected to us on |
190 |
adx |
30 |
* the given fd. The sockhost field is initialized with the ip# of the host. |
191 |
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* An unique id is calculated now, in case it is needed for auth. |
192 |
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* The client is sent to the auth module for verification, and not put in |
193 |
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* any client list yet. |
194 |
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*/ |
195 |
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void |
196 |
michael |
549 |
add_connection(struct Listener *listener, struct irc_ssaddr *irn, int fd) |
197 |
adx |
30 |
{ |
198 |
michael |
7957 |
struct Client *client_p = client_make(NULL); |
199 |
michael |
549 |
|
200 |
michael |
8658 |
client_p->connection->fd = fd_open(fd, true, (listener->flags & LISTENER_SSL) ? |
201 |
michael |
8339 |
"Incoming SSL connection" : "Incoming connection"); |
202 |
adx |
30 |
|
203 |
michael |
1123 |
/* |
204 |
adx |
30 |
* copy address to 'sockhost' as a string, copy it to host too |
205 |
|
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* so we have something valid to put into error messages... |
206 |
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*/ |
207 |
michael |
9003 |
client_p->ip = *irn; |
208 |
adx |
30 |
|
209 |
michael |
8496 |
getnameinfo((const struct sockaddr *)&client_p->ip, |
210 |
|
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client_p->ip.ss_len, client_p->sockhost, |
211 |
michael |
3171 |
sizeof(client_p->sockhost), NULL, 0, NI_NUMERICHOST); |
212 |
michael |
1072 |
|
213 |
michael |
8265 |
if (client_p->sockhost[0] == ':') |
214 |
adx |
30 |
{ |
215 |
michael |
8265 |
client_p->sockhost[0] = '0'; |
216 |
michael |
7431 |
memmove(client_p->sockhost + 1, client_p->sockhost, sizeof(client_p->sockhost) - 1); |
217 |
michael |
549 |
} |
218 |
adx |
30 |
|
219 |
michael |
8265 |
strlcpy(client_p->host, client_p->sockhost, sizeof(client_p->host)); |
220 |
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|
221 |
michael |
4588 |
client_p->connection->listener = listener; |
222 |
adx |
30 |
++listener->ref_count; |
223 |
|
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|
224 |
michael |
7274 |
if (listener->flags & LISTENER_SSL) |
225 |
adx |
30 |
{ |
226 |
michael |
8688 |
if (tls_new(&client_p->connection->fd->ssl, fd, TLS_ROLE_SERVER) == false) |
227 |
adx |
30 |
{ |
228 |
michael |
3171 |
SetDead(client_p); |
229 |
michael |
7105 |
exit_client(client_p, "TLS context initialization failed"); |
230 |
adx |
30 |
return; |
231 |
|
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} |
232 |
|
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|
233 |
michael |
3171 |
AddFlag(client_p, FLAGS_SSL); |
234 |
michael |
8339 |
ssl_handshake(client_p->connection->fd, client_p); |
235 |
adx |
30 |
} |
236 |
|
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else |
237 |
michael |
7955 |
auth_start(client_p); |
238 |
adx |
30 |
} |
239 |
|
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|
240 |
|
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/* |
241 |
|
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* stolen from squid - its a neat (but overused! :) routine which we |
242 |
|
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* can use to see whether we can ignore this errno or not. It is |
243 |
|
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* generally useful for non-blocking network IO related errnos. |
244 |
|
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* -- adrian |
245 |
|
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*/ |
246 |
michael |
8660 |
bool |
247 |
michael |
8414 |
comm_ignore_errno(int ierrno) |
248 |
adx |
30 |
{ |
249 |
|
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switch (ierrno) |
250 |
|
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{ |
251 |
|
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case EINPROGRESS: |
252 |
|
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case EWOULDBLOCK: |
253 |
|
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#if EAGAIN != EWOULDBLOCK |
254 |
|
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case EAGAIN: |
255 |
|
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#endif |
256 |
|
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case EALREADY: |
257 |
|
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case EINTR: |
258 |
|
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#ifdef ERESTART |
259 |
|
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case ERESTART: |
260 |
|
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#endif |
261 |
michael |
8660 |
return true; |
262 |
adx |
30 |
default: |
263 |
michael |
8660 |
return false; |
264 |
adx |
30 |
} |
265 |
|
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} |
266 |
|
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|
267 |
|
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/* |
268 |
|
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* comm_settimeout() - set the socket timeout |
269 |
|
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* |
270 |
|
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* Set the timeout for the fd |
271 |
|
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*/ |
272 |
|
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void |
273 |
michael |
8339 |
comm_settimeout(fde_t *F, uintmax_t timeout, void (*callback)(fde_t *, void *), void *cbdata) |
274 |
adx |
30 |
{ |
275 |
michael |
8717 |
assert(F); |
276 |
michael |
8658 |
assert(F->flags.open == true); |
277 |
adx |
30 |
|
278 |
michael |
8941 |
F->timeout = event_base->time.sec_monotonic + timeout; |
279 |
michael |
8339 |
F->timeout_handler = callback; |
280 |
|
|
F->timeout_data = cbdata; |
281 |
adx |
30 |
} |
282 |
|
|
|
283 |
|
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/* |
284 |
|
|
* comm_setflush() - set a flush function |
285 |
|
|
* |
286 |
|
|
* A flush function is simply a function called if found during |
287 |
|
|
* comm_timeouts(). Its basically a second timeout, except in this case |
288 |
|
|
* I'm too lazy to implement multiple timeout functions! :-) |
289 |
|
|
* its kinda nice to have it separate, since this is designed for |
290 |
|
|
* flush functions, and when comm_close() is implemented correctly |
291 |
|
|
* with close functions, we _actually_ don't call comm_close() here .. |
292 |
|
|
* -- originally Adrian's notes |
293 |
michael |
2916 |
* comm_close() is replaced with fd_close() in fdlist.c |
294 |
adx |
30 |
*/ |
295 |
|
|
void |
296 |
michael |
8339 |
comm_setflush(fde_t *F, uintmax_t timeout, void (*callback)(fde_t *, void *), void *cbdata) |
297 |
adx |
30 |
{ |
298 |
michael |
8717 |
assert(F); |
299 |
michael |
8658 |
assert(F->flags.open == true); |
300 |
adx |
30 |
|
301 |
michael |
8941 |
F->flush_timeout = event_base->time.sec_monotonic + timeout; |
302 |
michael |
8339 |
F->flush_handler = callback; |
303 |
|
|
F->flush_data = cbdata; |
304 |
adx |
30 |
} |
305 |
|
|
|
306 |
|
|
/* |
307 |
|
|
* comm_checktimeouts() - check the socket timeouts |
308 |
|
|
* |
309 |
|
|
* All this routine does is call the given callback/cbdata, without closing |
310 |
|
|
* down the file descriptor. When close handlers have been implemented, |
311 |
|
|
* this will happen. |
312 |
|
|
*/ |
313 |
|
|
void |
314 |
michael |
4439 |
comm_checktimeouts(void *unused) |
315 |
adx |
30 |
{ |
316 |
michael |
4461 |
void (*hdl)(fde_t *, void *); |
317 |
adx |
30 |
void *data; |
318 |
|
|
|
319 |
michael |
8339 |
for (int fd = 0; fd <= highest_fd; ++fd) |
320 |
michael |
7431 |
{ |
321 |
michael |
8339 |
fde_t *F = &fd_table[fd]; |
322 |
adx |
30 |
|
323 |
michael |
8658 |
if (F->flags.open == false) |
324 |
michael |
8339 |
continue; |
325 |
adx |
30 |
|
326 |
michael |
8339 |
/* check flush functions */ |
327 |
|
|
if (F->flush_handler && F->flush_timeout > 0 && |
328 |
michael |
8900 |
F->flush_timeout < event_base->time.sec_monotonic) |
329 |
michael |
8339 |
{ |
330 |
|
|
hdl = F->flush_handler; |
331 |
|
|
data = F->flush_data; |
332 |
michael |
8349 |
|
333 |
michael |
8339 |
comm_setflush(F, 0, NULL, NULL); |
334 |
|
|
hdl(F, data); |
335 |
adx |
30 |
} |
336 |
michael |
8339 |
|
337 |
|
|
/* check timeouts */ |
338 |
|
|
if (F->timeout_handler && F->timeout > 0 && |
339 |
michael |
8900 |
F->timeout < event_base->time.sec_monotonic) |
340 |
michael |
8339 |
{ |
341 |
|
|
/* Call timeout handler */ |
342 |
|
|
hdl = F->timeout_handler; |
343 |
|
|
data = F->timeout_data; |
344 |
michael |
8349 |
|
345 |
michael |
8339 |
comm_settimeout(F, 0, NULL, NULL); |
346 |
|
|
hdl(F, data); |
347 |
|
|
} |
348 |
michael |
7431 |
} |
349 |
adx |
30 |
} |
350 |
|
|
|
351 |
|
|
/* |
352 |
|
|
* void comm_connect_tcp(int fd, const char *host, unsigned short port, |
353 |
|
|
* struct sockaddr *clocal, int socklen, |
354 |
|
|
* CNCB *callback, void *data, int aftype, int timeout) |
355 |
|
|
* Input: An fd to connect with, a host and port to connect to, |
356 |
|
|
* a local sockaddr to connect from + length(or NULL to use the |
357 |
|
|
* default), a callback, the data to pass into the callback, the |
358 |
|
|
* address family. |
359 |
|
|
* Output: None. |
360 |
|
|
* Side-effects: A non-blocking connection to the host is started, and |
361 |
|
|
* if necessary, set up for selection. The callback given |
362 |
|
|
* may be called now, or it may be called later. |
363 |
|
|
*/ |
364 |
|
|
void |
365 |
michael |
8872 |
comm_connect_tcp(fde_t *F, const struct irc_ssaddr *caddr, unsigned short port, const struct irc_ssaddr *baddr, |
366 |
|
|
void (*callback)(fde_t *, int, void *), void *data, uintmax_t timeout) |
367 |
adx |
30 |
{ |
368 |
michael |
8872 |
assert(callback); |
369 |
adx |
30 |
|
370 |
michael |
8872 |
/* The cast is hacky, but safe - port offset is same on v4 and v6 */ |
371 |
|
|
((struct sockaddr_in *)&F->connect.hostaddr)->sin_port = htons(port); |
372 |
michael |
9033 |
F->connect.hostaddr = *caddr; |
373 |
michael |
8339 |
F->connect.callback = callback; |
374 |
|
|
F->connect.data = data; |
375 |
adx |
30 |
|
376 |
|
|
/* Note that we're using a passed sockaddr here. This is because |
377 |
|
|
* generally you'll be bind()ing to a sockaddr grabbed from |
378 |
|
|
* getsockname(), so this makes things easier. |
379 |
|
|
* XXX If NULL is passed as local, we should later on bind() to the |
380 |
|
|
* virtual host IP, for completeness. |
381 |
|
|
* -- adrian |
382 |
|
|
*/ |
383 |
michael |
8872 |
if (baddr && bind(F->fd, (const struct sockaddr *)baddr, baddr->ss_len) < 0) |
384 |
michael |
2916 |
{ |
385 |
adx |
30 |
/* Failure, call the callback with COMM_ERR_BIND */ |
386 |
michael |
8339 |
comm_connect_callback(F, COMM_ERR_BIND); |
387 |
michael |
6948 |
return; /* ... and quit */ |
388 |
adx |
30 |
} |
389 |
|
|
|
390 |
michael |
8941 |
comm_settimeout(F, timeout, comm_connect_timeout, NULL); |
391 |
michael |
8872 |
comm_connect_tryconnect(F, NULL); |
392 |
adx |
30 |
} |
393 |
|
|
|
394 |
|
|
/* |
395 |
|
|
* comm_connect_callback() - call the callback, and continue with life |
396 |
|
|
*/ |
397 |
|
|
static void |
398 |
michael |
8339 |
comm_connect_callback(fde_t *F, int status) |
399 |
adx |
30 |
{ |
400 |
michael |
4464 |
void (*hdl)(fde_t *, int, void *); |
401 |
adx |
30 |
|
402 |
|
|
/* This check is gross..but probably necessary */ |
403 |
michael |
8339 |
if (F->connect.callback == NULL) |
404 |
adx |
30 |
return; |
405 |
|
|
|
406 |
|
|
/* Clear the connect flag + handler */ |
407 |
michael |
8339 |
hdl = F->connect.callback; |
408 |
|
|
F->connect.callback = NULL; |
409 |
adx |
30 |
|
410 |
|
|
/* Clear the timeout handler */ |
411 |
michael |
8339 |
comm_settimeout(F, 0, NULL, NULL); |
412 |
adx |
30 |
|
413 |
|
|
/* Call the handler */ |
414 |
michael |
8339 |
hdl(F, status, F->connect.data); |
415 |
adx |
30 |
} |
416 |
|
|
|
417 |
|
|
/* |
418 |
|
|
* comm_connect_timeout() - this gets called when the socket connection |
419 |
|
|
* times out. This *only* can be called once connect() is initially |
420 |
|
|
* called .. |
421 |
|
|
*/ |
422 |
|
|
static void |
423 |
michael |
8339 |
comm_connect_timeout(fde_t *F, void *unused) |
424 |
adx |
30 |
{ |
425 |
|
|
/* error! */ |
426 |
michael |
8339 |
comm_connect_callback(F, COMM_ERR_TIMEOUT); |
427 |
adx |
30 |
} |
428 |
|
|
|
429 |
michael |
8339 |
/* static void comm_connect_tryconnect(fde_t *fd, void *unused) |
430 |
adx |
30 |
* Input: The fd, the handler data(unused). |
431 |
|
|
* Output: None. |
432 |
|
|
* Side-effects: Try and connect with pending connect data for the FD. If |
433 |
|
|
* we succeed or get a fatal error, call the callback. |
434 |
|
|
* Otherwise, it is still blocking or something, so register |
435 |
|
|
* to select for a write event on this FD. |
436 |
|
|
*/ |
437 |
|
|
static void |
438 |
michael |
8339 |
comm_connect_tryconnect(fde_t *F, void *unused) |
439 |
adx |
30 |
{ |
440 |
|
|
/* This check is needed or re-entrant s_bsd_* like sigio break it. */ |
441 |
michael |
8339 |
if (F->connect.callback == NULL) |
442 |
adx |
30 |
return; |
443 |
|
|
|
444 |
|
|
/* Try the connect() */ |
445 |
michael |
8339 |
int retval = connect(F->fd, (struct sockaddr *)&F->connect.hostaddr, F->connect.hostaddr.ss_len); |
446 |
adx |
30 |
|
447 |
|
|
/* Error? */ |
448 |
|
|
if (retval < 0) |
449 |
|
|
{ |
450 |
|
|
/* |
451 |
|
|
* If we get EISCONN, then we've already connect()ed the socket, |
452 |
|
|
* which is a good thing. |
453 |
|
|
* -- adrian |
454 |
|
|
*/ |
455 |
|
|
if (errno == EISCONN) |
456 |
michael |
8339 |
comm_connect_callback(F, COMM_OK); |
457 |
michael |
8414 |
else if (comm_ignore_errno(errno)) |
458 |
adx |
30 |
/* Ignore error? Reschedule */ |
459 |
michael |
8339 |
comm_setselect(F, COMM_SELECT_WRITE, comm_connect_tryconnect, NULL, 0); |
460 |
adx |
30 |
else |
461 |
|
|
/* Error? Fail with COMM_ERR_CONNECT */ |
462 |
michael |
8339 |
comm_connect_callback(F, COMM_ERR_CONNECT); |
463 |
adx |
30 |
return; |
464 |
|
|
} |
465 |
|
|
|
466 |
|
|
/* If we get here, we've suceeded, so call with COMM_OK */ |
467 |
michael |
8339 |
comm_connect_callback(F, COMM_OK); |
468 |
adx |
30 |
} |
469 |
|
|
|
470 |
|
|
/* |
471 |
|
|
* comm_errorstr() - return an error string for the given error condition |
472 |
|
|
*/ |
473 |
|
|
const char * |
474 |
|
|
comm_errstr(int error) |
475 |
|
|
{ |
476 |
|
|
if (error < 0 || error >= COMM_ERR_MAX) |
477 |
|
|
return "Invalid error number!"; |
478 |
|
|
return comm_err_str[error]; |
479 |
|
|
} |
480 |
|
|
|
481 |
|
|
/* |
482 |
|
|
* comm_open() - open a socket |
483 |
|
|
* |
484 |
|
|
* This is a highly highly cut down version of squid's comm_open() which |
485 |
|
|
* for the most part emulates socket(), *EXCEPT* it fails if we're about |
486 |
|
|
* to run out of file descriptors. |
487 |
|
|
*/ |
488 |
|
|
int |
489 |
michael |
8339 |
comm_socket(int family, int sock_type, int proto) |
490 |
adx |
30 |
{ |
491 |
|
|
/* First, make sure we aren't going to run out of file descriptors */ |
492 |
|
|
if (number_fd >= hard_fdlimit) |
493 |
|
|
{ |
494 |
|
|
errno = ENFILE; |
495 |
|
|
return -1; |
496 |
|
|
} |
497 |
|
|
|
498 |
|
|
/* |
499 |
|
|
* Next, we try to open the socket. We *should* drop the reserved FD |
500 |
|
|
* limit if/when we get an error, but we can deal with that later. |
501 |
|
|
* XXX !!! -- adrian |
502 |
|
|
*/ |
503 |
michael |
7431 |
int fd = socket(family, sock_type, proto); |
504 |
adx |
30 |
if (fd < 0) |
505 |
|
|
return -1; /* errno will be passed through, yay.. */ |
506 |
|
|
|
507 |
michael |
2632 |
setup_socket(fd); |
508 |
adx |
30 |
|
509 |
michael |
8339 |
return fd; |
510 |
adx |
30 |
} |
511 |
|
|
|
512 |
|
|
/* |
513 |
|
|
* comm_accept() - accept an incoming connection |
514 |
|
|
* |
515 |
|
|
* This is a simple wrapper for accept() which enforces FD limits like |
516 |
|
|
* comm_open() does. Returned fd must be either closed or tagged with |
517 |
|
|
* fd_open (this function no longer does it). |
518 |
|
|
*/ |
519 |
|
|
int |
520 |
michael |
8826 |
comm_accept(fde_t *F, struct irc_ssaddr *addr) |
521 |
adx |
30 |
{ |
522 |
|
|
socklen_t addrlen = sizeof(struct irc_ssaddr); |
523 |
|
|
|
524 |
|
|
if (number_fd >= hard_fdlimit) |
525 |
|
|
{ |
526 |
|
|
errno = ENFILE; |
527 |
|
|
return -1; |
528 |
|
|
} |
529 |
|
|
|
530 |
michael |
8431 |
memset(addr, 0, sizeof(*addr)); |
531 |
michael |
4407 |
|
532 |
adx |
30 |
/* |
533 |
|
|
* Next, do the accept(). if we get an error, we should drop the |
534 |
|
|
* reserved fd limit, but we can deal with that when comm_open() |
535 |
|
|
* also does it. XXX -- adrian |
536 |
|
|
*/ |
537 |
michael |
8826 |
int fd = accept(F->fd, (struct sockaddr *)addr, &addrlen); |
538 |
|
|
if (fd < 0) |
539 |
adx |
30 |
return -1; |
540 |
|
|
|
541 |
michael |
4407 |
remove_ipv6_mapping(addr); |
542 |
adx |
30 |
|
543 |
michael |
8826 |
setup_socket(fd); |
544 |
adx |
30 |
|
545 |
|
|
/* .. and return */ |
546 |
michael |
8826 |
return fd; |
547 |
adx |
30 |
} |
548 |
|
|
|
549 |
michael |
2916 |
/* |
550 |
adx |
30 |
* remove_ipv6_mapping() - Removes IPv4-In-IPv6 mapping from an address |
551 |
michael |
1122 |
* OSes with IPv6 mapping listening on both |
552 |
adx |
30 |
* AF_INET and AF_INET6 map AF_INET connections inside AF_INET6 structures |
553 |
michael |
2916 |
* |
554 |
adx |
30 |
*/ |
555 |
|
|
void |
556 |
|
|
remove_ipv6_mapping(struct irc_ssaddr *addr) |
557 |
|
|
{ |
558 |
|
|
if (addr->ss.ss_family == AF_INET6) |
559 |
|
|
{ |
560 |
michael |
1122 |
if (IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)addr)->sin6_addr)) |
561 |
|
|
{ |
562 |
michael |
2916 |
struct sockaddr_in6 v6; |
563 |
michael |
1122 |
struct sockaddr_in *v4 = (struct sockaddr_in *)addr; |
564 |
adx |
30 |
|
565 |
michael |
1122 |
memcpy(&v6, addr, sizeof(v6)); |
566 |
|
|
memset(v4, 0, sizeof(struct sockaddr_in)); |
567 |
|
|
memcpy(&v4->sin_addr, &v6.sin6_addr.s6_addr[12], sizeof(v4->sin_addr)); |
568 |
|
|
|
569 |
adx |
30 |
addr->ss.ss_family = AF_INET; |
570 |
|
|
addr->ss_len = sizeof(struct sockaddr_in); |
571 |
|
|
} |
572 |
michael |
2916 |
else |
573 |
adx |
30 |
addr->ss_len = sizeof(struct sockaddr_in6); |
574 |
|
|
} |
575 |
|
|
else |
576 |
|
|
addr->ss_len = sizeof(struct sockaddr_in); |
577 |
michael |
2916 |
} |