]>
Commit | Line | Data |
---|---|---|
a47b9029 | 1 | |
f1443bd9 | 2 | /* |
b6a2f15e | 3 | * $Id: ident.cc,v 1.50 1999/04/15 06:15:59 wessels Exp $ |
632e2027 | 4 | * |
3c66d057 | 5 | * DEBUG: section 30 Ident (RFC 931) |
632e2027 | 6 | * AUTHOR: Duane Wessels |
7 | * | |
42c04c16 | 8 | * SQUID Internet Object Cache http://squid.nlanr.net/Squid/ |
e25c139f | 9 | * ---------------------------------------------------------- |
632e2027 | 10 | * |
11 | * Squid is the result of efforts by numerous individuals from the | |
12 | * Internet community. Development is led by Duane Wessels of the | |
e25c139f | 13 | * National Laboratory for Applied Network Research and funded by the |
14 | * National Science Foundation. Squid is Copyrighted (C) 1998 by | |
15 | * Duane Wessels and the University of California San Diego. Please | |
16 | * see the COPYRIGHT file for full details. Squid incorporates | |
17 | * software developed and/or copyrighted by other sources. Please see | |
18 | * the CREDITS file for full details. | |
632e2027 | 19 | * |
20 | * This program is free software; you can redistribute it and/or modify | |
21 | * it under the terms of the GNU General Public License as published by | |
22 | * the Free Software Foundation; either version 2 of the License, or | |
23 | * (at your option) any later version. | |
24 | * | |
25 | * This program is distributed in the hope that it will be useful, | |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | * GNU General Public License for more details. | |
29 | * | |
30 | * You should have received a copy of the GNU General Public License | |
31 | * along with this program; if not, write to the Free Software | |
cbdec147 | 32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 33 | * |
f1443bd9 | 34 | */ |
35 | ||
36 | #include "squid.h" | |
37 | ||
3898f57f | 38 | #if USE_IDENT |
39 | ||
f1443bd9 | 40 | #define IDENT_PORT 113 |
05832ae1 | 41 | #define IDENT_KEY_SZ 50 |
42 | ||
43 | typedef struct _IdentClient { | |
44 | IDCB *callback; | |
45 | void *callback_data; | |
46 | struct _IdentClient *next; | |
47 | } IdentClient; | |
48 | ||
49 | typedef struct _IdentStateData { | |
50 | char *key; | |
51 | struct _IdentStateData *next; | |
52 | int fd; /* IDENT fd */ | |
53 | struct sockaddr_in me; | |
54 | struct sockaddr_in peer; | |
55 | IdentClient *clients; | |
56 | } IdentStateData; | |
f1443bd9 | 57 | |
582b6456 | 58 | static PF identReadReply; |
59 | static PF identClose; | |
86cf9987 | 60 | static PF identTimeout; |
4f92c80c | 61 | static CNCB identConnectDone; |
05832ae1 | 62 | static hash_table *ident_hash = NULL; |
63 | static void identClientAdd(IdentStateData *, IDCB *, void *); | |
64 | ||
65 | /**** PRIVATE FUNCTIONS ****/ | |
66 | ||
67 | static void | |
68 | identCallback(IdentStateData * state, char *result) | |
69 | { | |
70 | IdentClient *client; | |
71 | if (result && *result == '\0') | |
72 | result = NULL; | |
73 | while ((client = state->clients)) { | |
74 | state->clients = client->next; | |
75 | if (cbdataValid(client->callback_data)) | |
76 | client->callback(result, client->callback_data); | |
77 | cbdataUnlock(client->callback_data); | |
78 | xfree(client); | |
79 | } | |
80 | } | |
f1443bd9 | 81 | |
b8d8561b | 82 | static void |
79d39a72 | 83 | identClose(int fdnotused, void *data) |
f1443bd9 | 84 | { |
05832ae1 | 85 | IdentStateData *state = data; |
86 | identCallback(state, NULL); | |
87 | comm_close(state->fd); | |
88 | hash_remove_link(ident_hash, (hash_link *) state); | |
89 | cbdataFree(state); | |
f1443bd9 | 90 | } |
91 | ||
86cf9987 | 92 | static void |
93 | identTimeout(int fd, void *data) | |
94 | { | |
05832ae1 | 95 | IdentStateData *state = data; |
1afe05c5 | 96 | debug(30, 3) ("identTimeout: FD %d, %s\n", fd, |
05832ae1 | 97 | inet_ntoa(state->peer.sin_addr)); |
86cf9987 | 98 | comm_close(fd); |
99 | } | |
100 | ||
e5f6c5c2 | 101 | static void |
102 | identConnectDone(int fd, int status, void *data) | |
103 | { | |
05832ae1 | 104 | IdentStateData *state = data; |
105 | IdentClient *c; | |
137ee196 | 106 | MemBuf mb; |
9e975e4e | 107 | if (status != COMM_OK) { |
05832ae1 | 108 | /* Failed to connect */ |
e5f6c5c2 | 109 | comm_close(fd); |
ba1d2afa | 110 | return; |
f1443bd9 | 111 | } |
05832ae1 | 112 | /* |
113 | * see if our clients still care | |
114 | */ | |
115 | for (c = state->clients; c; c = c->next) { | |
116 | if (cbdataValid(c->callback_data)) | |
117 | break; | |
118 | } | |
ac2a30fc | 119 | if (c == NULL) { |
120 | /* no clients care */ | |
05832ae1 | 121 | comm_close(fd); |
ac2a30fc | 122 | return; |
123 | } | |
137ee196 | 124 | memBufDefInit(&mb); |
125 | memBufPrintf(&mb, "%d, %d\r\n", | |
05832ae1 | 126 | ntohs(state->peer.sin_port), |
127 | ntohs(state->me.sin_port)); | |
128 | comm_write_mbuf(fd, mb, NULL, state); | |
129 | commSetSelect(fd, COMM_SELECT_READ, identReadReply, state, 0); | |
130 | commSetTimeout(fd, Config.Timeout.ident, identTimeout, state); | |
f1443bd9 | 131 | } |
132 | ||
b8d8561b | 133 | static void |
582b6456 | 134 | identReadReply(int fd, void *data) |
f1443bd9 | 135 | { |
05832ae1 | 136 | IdentStateData *state = data; |
95d659f0 | 137 | LOCAL_ARRAY(char, buf, BUFSIZ); |
05832ae1 | 138 | char *ident = NULL; |
f1443bd9 | 139 | char *t = NULL; |
140 | int len = -1; | |
f1443bd9 | 141 | buf[0] = '\0'; |
886f2785 | 142 | Counter.syscalls.sock.reads++; |
e42d5181 | 143 | len = read(fd, buf, BUFSIZ - 1); |
4f92c80c | 144 | fd_bytes(fd, len, FD_READ); |
05832ae1 | 145 | if (len <= 0) { |
146 | comm_close(fd); | |
147 | return; | |
148 | } | |
149 | /* | |
150 | * XXX This isn't really very tolerant. It should read until EOL | |
151 | * or EOF and then decode the answer... If the reply is fragmented | |
152 | * then this will fail | |
153 | */ | |
154 | buf[len] = '\0'; | |
155 | if ((t = strchr(buf, '\r'))) | |
156 | *t = '\0'; | |
157 | if ((t = strchr(buf, '\n'))) | |
158 | *t = '\0'; | |
159 | debug(30, 5) ("identReadReply: FD %d: Read '%s'\n", fd, buf); | |
160 | if (strstr(buf, "USERID")) { | |
161 | if ((ident = strrchr(buf, ':'))) { | |
b6a2f15e | 162 | while (xisspace(*++ident)); |
05832ae1 | 163 | identCallback(state, ident); |
f1443bd9 | 164 | } |
165 | } | |
166 | comm_close(fd); | |
ba1d2afa | 167 | } |
168 | ||
05832ae1 | 169 | |
ba1d2afa | 170 | static void |
05832ae1 | 171 | identClientAdd(IdentStateData * state, IDCB * callback, void *callback_data) |
172 | { | |
173 | IdentClient *c = xcalloc(1, sizeof(*c)); | |
174 | IdentClient **C; | |
175 | c->callback = callback; | |
176 | c->callback_data = callback_data; | |
177 | cbdataLock(callback_data); | |
178 | for (C = &state->clients; *C; C = &(*C)->next); | |
179 | *C = c; | |
180 | } | |
181 | ||
182 | /**** PUBLIC FUNCTIONS ****/ | |
183 | ||
184 | /* | |
185 | * start a TCP connection to the peer host on port 113 | |
186 | */ | |
187 | void | |
188 | identStart(struct sockaddr_in *me, struct sockaddr_in *peer, IDCB * callback, void *data) | |
189 | { | |
190 | IdentStateData *state; | |
191 | int fd; | |
192 | char key1[IDENT_KEY_SZ]; | |
193 | char key2[IDENT_KEY_SZ]; | |
194 | char key[IDENT_KEY_SZ]; | |
195 | snprintf(key1, IDENT_KEY_SZ, "%s:%d", | |
196 | inet_ntoa(me->sin_addr), | |
197 | ntohs(me->sin_port)); | |
198 | snprintf(key2, IDENT_KEY_SZ, "%s:%d", | |
199 | inet_ntoa(peer->sin_addr), | |
200 | ntohs(peer->sin_port)); | |
201 | snprintf(key, IDENT_KEY_SZ, "%s,%s", key1, key2); | |
202 | if ((state = hash_lookup(ident_hash, key)) != NULL) { | |
203 | identClientAdd(state, callback, data); | |
204 | return; | |
205 | } | |
206 | fd = comm_open(SOCK_STREAM, | |
207 | 0, | |
208 | me->sin_addr, | |
209 | 0, | |
210 | COMM_NONBLOCKING, | |
211 | "ident"); | |
212 | if (fd == COMM_ERROR) { | |
213 | /* Failed to get a local socket */ | |
214 | callback(NULL, data); | |
215 | return; | |
216 | } | |
217 | state = xcalloc(1, sizeof(IdentStateData)); | |
218 | cbdataAdd(state, cbdataXfree, 0); | |
219 | state->key = xstrdup(key); | |
220 | state->fd = fd; | |
221 | state->me = *me; | |
222 | state->peer = *peer; | |
223 | identClientAdd(state, callback, data); | |
224 | hash_join(ident_hash, (hash_link *) state); | |
225 | comm_add_close_handler(fd, | |
226 | identClose, | |
227 | state); | |
228 | commSetTimeout(fd, Config.Timeout.ident, identTimeout, state); | |
229 | commConnectStart(fd, | |
230 | inet_ntoa(state->peer.sin_addr), | |
231 | IDENT_PORT, | |
232 | identConnectDone, | |
233 | state); | |
234 | } | |
235 | ||
236 | void | |
237 | identInit(void) | |
ba1d2afa | 238 | { |
05832ae1 | 239 | ident_hash = hash_create((HASHCMP *) strcmp, |
240 | hashPrime(Squid_MaxFD / 8), | |
241 | hash4); | |
f1443bd9 | 242 | } |
3898f57f | 243 | |
244 | #endif |