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view src/libident/id_parse.c @ 281:ea5f86e0a81c

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modes are now enforced exclusive Other MTAs (exim, postfix) are more relaxing, but as combinations of exclusive modes are senseless we behave more obvious if we fail early. This makes understanding the behavior easier too.
author markus schnalke <meillo@marmaro.de>
date Tue, 07 Dec 2010 14:04:56 -0300
parents 08114f7dcc23
children
line source
1 /*
2 ** id_parse.c Receive and parse a reply from an IDENT server
3 **
4 ** Author: Peter Eriksson <pen@lysator.liu.se>
5 ** Fiddling: Pär Emanuelsson <pell@lysator.liu.se>
6 */
7
8 #ifdef NeXT3
9 # include <libc.h>
10 #endif
11
12 #include <stdio.h>
13 #include <string.h>
14 #include <errno.h>
15 #include <ctype.h>
16
17 #ifdef HAVE_ANSIHEADERS
18 # include <stdlib.h>
19 # include <string.h>
20 # include <unistd.h>
21 #endif
22
23 #include <sys/types.h>
24 #include <sys/wait.h>
25 #include <sys/time.h>
26
27 #ifdef _AIX
28 # include <sys/select.h>
29 #endif
30
31 #ifdef _AIX
32 # include <sys/select.h>
33 #endif
34 #ifdef VMS
35 # include <sys/socket.h> /* for fd_set */
36 #endif
37 #define IN_LIBIDENT_SRC
38 #include "ident.h"
39
40
41 /*
42 int
43 id_parse __P7(ident_t *, id,
44 struct timeval *, timeout,
45 int *, lport,
46 int *, fport,
47 char **, identifier,
48 char **, opsys,
49 char **, charset)
50 */
51
52 int
53 id_parse __P((ident_t * id,
54 __STRUCT_TIMEVAL_P timeout,
55 int *lport,
56 int *fport,
57 char **identifier,
58 char **opsys,
59 char **charset))
60 {
61 char c, *cp, *tmp_charset;
62 fd_set rs;
63 int pos, res = 0, lp, fp;
64
65 errno = 0;
66
67 tmp_charset = 0;
68
69 if (!id)
70 return -1;
71 if (lport)
72 *lport = 0;
73 if (fport)
74 *fport = 0;
75 if (identifier)
76 *identifier = 0;
77 if (opsys)
78 *opsys = 0;
79 if (charset)
80 *charset = 0;
81
82 pos = strlen(id->buf);
83
84 if (timeout) {
85 FD_ZERO(&rs);
86 FD_SET(id->fd, &rs);
87
88 #ifdef __hpux
89 if ((res = select(FD_SETSIZE, (int *) &rs, (int *) 0, (int *) 0, timeout)) < 0)
90 #else
91 if ((res = select(FD_SETSIZE, &rs, (fd_set *) 0, (fd_set *) 0, timeout)) < 0)
92 #endif
93 return -1;
94
95 if (res == 0) {
96 errno = ETIMEDOUT;
97 return -1;
98 }
99 }
100
101 /* Every octal value is allowed except 0, \n and \r */
102 while (pos < sizeof(id->buf)
103 && (res = read(id->fd, id->buf + pos, 1)) == 1
104 && id->buf[pos] != '\n' && id->buf[pos] != '\r')
105 pos++;
106
107 if (res < 0)
108 return -1;
109
110 if (res == 0) {
111 errno = ENOTCONN;
112 return -1;
113 }
114
115 if (id->buf[pos] != '\n' && id->buf[pos] != '\r')
116 return 0; /* Not properly terminated string */
117
118 id->buf[pos++] = '\0';
119
120 /*
121 ** Get first field (<lport> , <fport>)
122 */
123 cp = id_strtok(id->buf, ":", &c);
124 if (!cp)
125 return -2;
126
127 if (sscanf(cp, " %d , %d", &lp, &fp) != 2) {
128 if (identifier) {
129 *identifier = id_strdup(cp);
130 if (*identifier == NULL)
131 return -4;
132 }
133 return -2;
134 }
135
136 if (lport)
137 *lport = lp;
138 if (fport)
139 *fport = fp;
140
141 /*
142 ** Get second field (USERID or ERROR)
143 */
144 cp = id_strtok((char *) 0, ":", &c);
145 if (!cp)
146 return -2;
147
148 if (strcmp(cp, "ERROR") == 0) {
149 cp = id_strtok((char *) 0, "\n\r", &c);
150 if (!cp)
151 return -2;
152
153 if (identifier) {
154 *identifier = id_strdup(cp);
155 if (*identifier == NULL)
156 return -4;
157 }
158
159 return 2;
160 } else if (strcmp(cp, "USERID") == 0) {
161 /*
162 ** Get first subfield of third field <opsys>
163 */
164 cp = id_strtok((char *) 0, ",:", &c);
165 if (!cp)
166 return -2;
167
168 if (opsys) {
169 *opsys = id_strdup(cp);
170 if (*opsys == NULL)
171 return -4;
172 }
173
174 /*
175 ** We have a second subfield (<charset>)
176 */
177 if (c == ',') {
178 cp = id_strtok((char *) 0, ":", &c);
179 if (!cp)
180 return -2;
181
182 tmp_charset = cp;
183 if (charset) {
184 *charset = id_strdup(cp);
185 if (*charset == NULL)
186 return -4;
187 }
188
189 /*
190 ** We have even more subfields - ignore them
191 */
192 if (c == ',')
193 id_strtok((char *) 0, ":", &c);
194 }
195
196 if (tmp_charset && strcmp(tmp_charset, "OCTET") == 0)
197 cp = id_strtok((char *) 0, (char *) 0, &c);
198 else
199 cp = id_strtok((char *) 0, "\n\r", &c);
200
201 if (identifier) {
202 *identifier = id_strdup(cp);
203 if (*identifier == NULL)
204 return -4;
205 }
206 return 1;
207 } else {
208 if (identifier) {
209 *identifier = id_strdup(cp);
210 if (*identifier == NULL)
211 return -4;
212 }
213 return -3;
214 }
215 }