1 |
lefcha |
1.1 |
#include <stdio.h> |
2 |
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#include <unistd.h> |
3 |
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#include <stdlib.h> |
4 |
lefcha |
1.9 |
#include <ctype.h> |
5 |
lefcha |
1.4 |
#include <errno.h> |
6 |
lefcha |
1.1 |
#include <string.h> |
7 |
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#include <sys/time.h> |
8 |
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#include <sys/types.h> |
9 |
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#include <regex.h> |
10 |
lefcha |
1.23.2.3 |
#include <setjmp.h> |
11 |
lefcha |
1.1 |
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12 |
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#include "config.h" |
13 |
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#include "imapfilter.h" |
14 |
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15 |
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16 |
lefcha |
1.20 |
extern int sockpri; |
17 |
lefcha |
1.18 |
extern unsigned int capabilities; |
18 |
lefcha |
1.23.2.3 |
extern jmp_buf acctloop; |
19 |
lefcha |
1.1 |
|
20 |
lefcha |
1.20 |
static char *vbuf = NULL; /* Virtual buffer. */ |
21 |
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static size_t vbufs = 0; /* Virtual buffer size. */ |
22 |
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23 |
lefcha |
1.1 |
|
24 |
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/* |
25 |
lefcha |
1.14 |
* Read one packet of data that the server sent. |
26 |
lefcha |
1.1 |
*/ |
27 |
lefcha |
1.20 |
void receive_response(int *sock, char *buf) |
28 |
lefcha |
1.1 |
{ |
29 |
lefcha |
1.20 |
socket_read(sock, buf); |
30 |
lefcha |
1.1 |
|
31 |
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#ifdef DEBUG |
32 |
lefcha |
1.14 |
printf("\n%s\n", buf); |
33 |
lefcha |
1.1 |
#endif |
34 |
lefcha |
1.11 |
|
35 |
lefcha |
1.1 |
} |
36 |
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37 |
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38 |
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/* |
39 |
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* Get server response to client's request. |
40 |
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*/ |
41 |
lefcha |
1.20 |
int server_response(int *sock, unsigned int tag) |
42 |
lefcha |
1.1 |
{ |
43 |
lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
44 |
lefcha |
1.6 |
|
45 |
lefcha |
1.20 |
reset_vbuf(); |
46 |
lefcha |
1.21 |
|
47 |
lefcha |
1.20 |
do { |
48 |
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receive_response(sock, buf); |
49 |
lefcha |
1.23.2.3 |
bye_response(buf); |
50 |
lefcha |
1.20 |
check_vbuf(strlen(buf)); |
51 |
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strncat(vbuf, buf, vbufs - strlen(vbuf)); |
52 |
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} while (tag && !strcasestr(buf, ultostr(tag, 16))); |
53 |
lefcha |
1.6 |
|
54 |
lefcha |
1.14 |
return analyze_response(buf); |
55 |
lefcha |
1.1 |
} |
56 |
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57 |
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58 |
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/* |
59 |
lefcha |
1.23.2.3 |
* Check if server sent a BYE response (connection is closed immediately). |
60 |
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*/ |
61 |
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void bye_response(char *buf) |
62 |
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{ |
63 |
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if (strcasestr(buf, "* BYE")) |
64 |
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longjmp(acctloop, -1); |
65 |
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} |
66 |
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67 |
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68 |
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/* |
69 |
lefcha |
1.9 |
* Process the greeting that server sends during connection. |
70 |
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*/ |
71 |
lefcha |
1.20 |
int greeting_response(int *sock) |
72 |
lefcha |
1.9 |
{ |
73 |
lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
74 |
lefcha |
1.9 |
|
75 |
lefcha |
1.20 |
receive_response(sock, buf); |
76 |
lefcha |
1.23.2.3 |
bye_response(buf); |
77 |
lefcha |
1.9 |
|
78 |
lefcha |
1.23.2.3 |
if (strcasestr(buf, "* PREAUTH")) |
79 |
lefcha |
1.14 |
return RESPONSE_PREAUTH; |
80 |
lefcha |
1.9 |
|
81 |
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return RESPONSE_OK; |
82 |
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} |
83 |
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|
84 |
lefcha |
1.13 |
|
85 |
lefcha |
1.9 |
/* |
86 |
lefcha |
1.23.2.2 |
* Process the data that server sent due to IMAP LOGOUT client request. |
87 |
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*/ |
88 |
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int logout_response(int *sock, unsigned int tag) |
89 |
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{ |
90 |
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char buf[RESPONSE_BUF]; |
91 |
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92 |
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reset_vbuf(); |
93 |
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94 |
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do { |
95 |
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receive_response(sock, buf); |
96 |
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check_vbuf(strlen(buf)); |
97 |
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strncat(vbuf, buf, vbufs - strlen(vbuf)); |
98 |
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} while (!strcasestr(buf, ultostr(tag, 16))); |
99 |
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100 |
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return analyze_response(buf); |
101 |
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} |
102 |
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103 |
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104 |
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/* |
105 |
lefcha |
1.9 |
* Process the data that server sent due to IMAP CAPABILITY client request. |
106 |
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*/ |
107 |
lefcha |
1.20 |
int capability_response(int *sock, unsigned int tag) |
108 |
lefcha |
1.9 |
{ |
109 |
lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
110 |
lefcha |
1.21 |
|
111 |
lefcha |
1.20 |
reset_vbuf(); |
112 |
lefcha |
1.9 |
|
113 |
lefcha |
1.20 |
do { |
114 |
lefcha |
1.21 |
receive_response(sock, buf); |
115 |
lefcha |
1.23.2.3 |
bye_response(buf); |
116 |
lefcha |
1.20 |
check_vbuf(strlen(buf)); |
117 |
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strncat(vbuf, buf, vbufs - strlen(vbuf)); |
118 |
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} while (!strcasestr(buf, ultostr(tag, 16))); |
119 |
lefcha |
1.9 |
|
120 |
lefcha |
1.20 |
if (!strcasestr(vbuf, "IMAP4rev1")) { |
121 |
lefcha |
1.9 |
error("imapfilter: server does not support IMAP4rev1 protocol\n"); |
122 |
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return -2; |
123 |
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} |
124 |
lefcha |
1.20 |
if (strcasestr(vbuf, "NAMESPACE")) |
125 |
lefcha |
1.18 |
capabilities |= CAPABILITY_NAMESPACE; |
126 |
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127 |
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return analyze_response(buf); |
128 |
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} |
129 |
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130 |
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131 |
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/* |
132 |
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* Process the data that server sent due to IMAP NAMESPACE client request. |
133 |
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*/ |
134 |
lefcha |
1.21 |
int namespace_response(int *sock, unsigned int tag, namesp_t * nsp) |
135 |
lefcha |
1.18 |
{ |
136 |
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char buf[RESPONSE_BUF]; |
137 |
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char *c, *d; |
138 |
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|
139 |
lefcha |
1.20 |
reset_vbuf(); |
140 |
lefcha |
1.21 |
|
141 |
lefcha |
1.20 |
do { |
142 |
lefcha |
1.23.2.1 |
receive_response(sock, buf); |
143 |
lefcha |
1.23.2.3 |
bye_response(buf); |
144 |
lefcha |
1.20 |
check_vbuf(strlen(buf)); |
145 |
lefcha |
1.21 |
strncat(vbuf, buf, vbufs - strlen(vbuf)); |
146 |
lefcha |
1.20 |
} while (!strcasestr(buf, ultostr(tag, 16))); |
147 |
lefcha |
1.18 |
|
148 |
lefcha |
1.20 |
if ((c = strcasestr(vbuf, "* NAMESPACE"))) { |
149 |
lefcha |
1.18 |
c += 12; |
150 |
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if (strncasecmp(c, "NIL", 3)) { |
151 |
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c = strchr(c, '"') + 1; |
152 |
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d = strchr(c, '"') + 1; |
153 |
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154 |
lefcha |
1.20 |
strncat(nsp->prefix, c, d - c - 1); |
155 |
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nsp->delim = *(strchr(d, '"') + 1); |
156 |
lefcha |
1.18 |
} |
157 |
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} |
158 |
lefcha |
1.20 |
#ifdef DEBUG |
159 |
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printf("debug: namespace: '%s' '%c'\n", nsp->prefix, nsp->delim); |
160 |
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#endif |
161 |
lefcha |
1.14 |
return analyze_response(buf); |
162 |
lefcha |
1.9 |
} |
163 |
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164 |
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165 |
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/* |
166 |
lefcha |
1.3 |
* Process the data that server sent due to IMAP STATUS client request. |
167 |
lefcha |
1.1 |
*/ |
168 |
lefcha |
1.20 |
int status_response(int *sock, unsigned int tag, char *mbox) |
169 |
lefcha |
1.1 |
{ |
170 |
lefcha |
1.17 |
int r; |
171 |
lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
172 |
lefcha |
1.1 |
unsigned int exist, recent, unseen; |
173 |
lefcha |
1.9 |
char *c; |
174 |
lefcha |
1.1 |
|
175 |
|
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exist = recent = unseen = 0; |
176 |
lefcha |
1.21 |
|
177 |
lefcha |
1.20 |
reset_vbuf(); |
178 |
lefcha |
1.1 |
|
179 |
lefcha |
1.20 |
do { |
180 |
|
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receive_response(sock, buf); |
181 |
lefcha |
1.23.2.3 |
bye_response(buf); |
182 |
lefcha |
1.20 |
check_vbuf(strlen(buf)); |
183 |
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strncat(vbuf, buf, vbufs - strlen(vbuf)); |
184 |
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} while (!strcasestr(buf, ultostr(tag, 16))); |
185 |
lefcha |
1.13 |
|
186 |
lefcha |
1.17 |
r = analyze_response(buf); |
187 |
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188 |
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if (r == RESPONSE_NO) |
189 |
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return -2; |
190 |
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|
191 |
lefcha |
1.20 |
if ((c = strcasestr(vbuf, "MESSAGES"))) { |
192 |
lefcha |
1.9 |
c += 9; |
193 |
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exist = strtoul(c, NULL, 10); |
194 |
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} |
195 |
lefcha |
1.20 |
if ((c = strcasestr(vbuf, "RECENT"))) { |
196 |
lefcha |
1.9 |
c += 7; |
197 |
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recent = strtoul(c, NULL, 10); |
198 |
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} |
199 |
lefcha |
1.20 |
if ((c = strcasestr(vbuf, "UNSEEN"))) { |
200 |
lefcha |
1.9 |
c += 7; |
201 |
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unseen = strtoul(c, NULL, 10); |
202 |
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} |
203 |
lefcha |
1.8 |
if (!exist) { |
204 |
lefcha |
1.19 |
info("No messages in mailbox \"%s\".\n", mbox); |
205 |
lefcha |
1.8 |
return -2; |
206 |
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} |
207 |
lefcha |
1.19 |
info("%d message%s, %d recent, %d unseen, in mailbox \"%s\".\n", exist, |
208 |
lefcha |
1.18 |
plural(exist), recent, unseen, mbox); |
209 |
lefcha |
1.9 |
|
210 |
lefcha |
1.17 |
return r; |
211 |
lefcha |
1.9 |
} |
212 |
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213 |
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214 |
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/* |
215 |
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* Process the data that server sent due to IMAP SELECT client request. |
216 |
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*/ |
217 |
lefcha |
1.20 |
int select_response(int *sock, unsigned int tag) |
218 |
lefcha |
1.9 |
{ |
219 |
lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
220 |
lefcha |
1.9 |
|
221 |
lefcha |
1.20 |
reset_vbuf(); |
222 |
lefcha |
1.21 |
|
223 |
lefcha |
1.20 |
do { |
224 |
|
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receive_response(sock, buf); |
225 |
lefcha |
1.23.2.3 |
bye_response(buf); |
226 |
lefcha |
1.20 |
check_vbuf(strlen(buf)); |
227 |
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strncat(vbuf, buf, vbufs - strlen(vbuf)); |
228 |
|
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} while (!strcasestr(buf, ultostr(tag, 16))); |
229 |
lefcha |
1.9 |
|
230 |
lefcha |
1.20 |
if (strcasestr(vbuf, "[READ-ONLY]")) |
231 |
lefcha |
1.9 |
return RESPONSE_READONLY; |
232 |
lefcha |
1.1 |
|
233 |
lefcha |
1.14 |
return analyze_response(buf); |
234 |
lefcha |
1.1 |
} |
235 |
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236 |
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237 |
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/* |
238 |
lefcha |
1.3 |
* Process the data that server sent due to IMAP SEARCH client request. |
239 |
lefcha |
1.1 |
*/ |
240 |
lefcha |
1.20 |
int search_response(int *sock, unsigned int tag, char **mesgs) |
241 |
lefcha |
1.1 |
{ |
242 |
lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
243 |
lefcha |
1.13 |
char *c, *m; |
244 |
lefcha |
1.20 |
unsigned int blen; |
245 |
lefcha |
1.13 |
|
246 |
lefcha |
1.20 |
reset_vbuf(); |
247 |
lefcha |
1.21 |
|
248 |
lefcha |
1.20 |
do { |
249 |
|
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receive_response(sock, buf); |
250 |
lefcha |
1.23.2.3 |
bye_response(buf); |
251 |
lefcha |
1.20 |
check_vbuf(strlen(buf)); |
252 |
|
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strncat(vbuf, buf, vbufs - strlen(vbuf)); |
253 |
|
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} while (!strcasestr(buf, ultostr(tag, 16))); |
254 |
lefcha |
1.1 |
|
255 |
lefcha |
1.20 |
if ((c = strcasestr(vbuf, "* SEARCH "))) { |
256 |
|
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blen = strlen(vbuf); |
257 |
lefcha |
1.21 |
|
258 |
|
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m = *mesgs = (char *)xmalloc(blen + 1); |
259 |
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|
260 |
lefcha |
1.20 |
c += 9; |
261 |
lefcha |
1.21 |
|
262 |
lefcha |
1.23.2.2 |
while (*c && (isdigit((unsigned char)(*c)) || *c == ' ')) |
263 |
lefcha |
1.20 |
*(m++) = *(c++); |
264 |
lefcha |
1.14 |
|
265 |
lefcha |
1.20 |
*m = 0; |
266 |
|
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} |
267 |
lefcha |
1.14 |
return analyze_response(buf); |
268 |
lefcha |
1.1 |
} |
269 |
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|
270 |
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|
271 |
|
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/* |
272 |
lefcha |
1.3 |
* Process the data that server sent due to IMAP FETCH client request. |
273 |
lefcha |
1.1 |
*/ |
274 |
lefcha |
1.23.2.4 |
int fetch_response(int *sock, int reset, char *fetch) |
275 |
lefcha |
1.1 |
{ |
276 |
lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
277 |
lefcha |
1.20 |
unsigned int i; |
278 |
|
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static unsigned int s; |
279 |
lefcha |
1.15 |
char *b; |
280 |
lefcha |
1.14 |
|
281 |
lefcha |
1.20 |
if (reset) { |
282 |
|
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s = 0; |
283 |
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return 0; |
284 |
|
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} |
285 |
|
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i = 0; |
286 |
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|
287 |
|
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receive_response(sock, buf); |
288 |
lefcha |
1.23.2.3 |
bye_response(buf); |
289 |
lefcha |
1.20 |
|
290 |
|
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b = buf; |
291 |
lefcha |
1.21 |
|
292 |
lefcha |
1.20 |
if (!s) { |
293 |
|
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b = strchr(b, '{'); |
294 |
|
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b++; |
295 |
lefcha |
1.21 |
s = atoi(b) - 2; |
296 |
lefcha |
1.20 |
b = strchr(b, '}'); |
297 |
|
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b += 3; |
298 |
|
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} |
299 |
|
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while (*b && s--) |
300 |
|
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fetch[i++] = *(b++); |
301 |
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|
302 |
|
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fetch[i] = 0; |
303 |
lefcha |
1.21 |
|
304 |
lefcha |
1.20 |
return analyze_response(buf); |
305 |
|
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} |
306 |
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|
307 |
lefcha |
1.6 |
|
308 |
lefcha |
1.20 |
/* |
309 |
|
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* Process the data that server sent due to IMAP FETCH RFC822.SIZE client |
310 |
|
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* request. |
311 |
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*/ |
312 |
|
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int fetchsize_response(int *sock, unsigned int *size, unsigned int tag) |
313 |
|
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{ |
314 |
|
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char buf[RESPONSE_BUF]; |
315 |
|
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char *c; |
316 |
lefcha |
1.21 |
|
317 |
lefcha |
1.20 |
*size = 0; |
318 |
lefcha |
1.21 |
|
319 |
lefcha |
1.20 |
reset_vbuf(); |
320 |
lefcha |
1.21 |
|
321 |
lefcha |
1.13 |
do { |
322 |
lefcha |
1.20 |
receive_response(sock, buf); |
323 |
lefcha |
1.23.2.3 |
bye_response(buf); |
324 |
lefcha |
1.20 |
check_vbuf(strlen(buf)); |
325 |
|
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strncat(vbuf, buf, vbufs - strlen(vbuf)); |
326 |
|
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} while (!strcasestr(buf, ultostr(tag, 16))); |
327 |
lefcha |
1.21 |
|
328 |
lefcha |
1.20 |
if ((c = strcasestr(vbuf, "FETCH (RFC822.SIZE "))) { |
329 |
|
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c += 19; |
330 |
|
|
*size = strtoul(c, NULL, 10); |
331 |
|
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} |
332 |
|
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return analyze_response(buf); |
333 |
|
|
} |
334 |
lefcha |
1.13 |
|
335 |
lefcha |
1.6 |
|
336 |
lefcha |
1.20 |
/* |
337 |
|
|
* Process the data that server sent due to IMAP APPEND client request. |
338 |
|
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*/ |
339 |
|
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int append_response(int *sock, unsigned int tag) |
340 |
|
|
{ |
341 |
|
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int r = RESPONSE_OK; |
342 |
|
|
char buf[RESPONSE_BUF]; |
343 |
lefcha |
1.21 |
|
344 |
lefcha |
1.20 |
reset_vbuf(); |
345 |
lefcha |
1.21 |
|
346 |
lefcha |
1.20 |
do { |
347 |
|
|
receive_response(sock, buf); |
348 |
lefcha |
1.23.2.3 |
bye_response(buf); |
349 |
lefcha |
1.21 |
check_vbuf(strlen(buf)); |
350 |
lefcha |
1.20 |
strncat(vbuf, buf, vbufs - strlen(vbuf)); |
351 |
lefcha |
1.14 |
} while (!strcasestr(buf, ultostr(tag, 16))); |
352 |
lefcha |
1.21 |
|
353 |
lefcha |
1.20 |
if ((r = analyze_response(buf)) == RESPONSE_NO && |
354 |
|
|
strcasestr(vbuf, "[TRYCREATE]")) |
355 |
|
|
return RESPONSE_TRYCREATE; |
356 |
lefcha |
1.6 |
|
357 |
lefcha |
1.20 |
return r; |
358 |
lefcha |
1.1 |
} |
359 |
|
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|
360 |
|
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|
361 |
|
|
/* |
362 |
lefcha |
1.3 |
* Process the data that server sent due to IMAP COPY client request. |
363 |
lefcha |
1.1 |
*/ |
364 |
lefcha |
1.20 |
int copy_response(int *sock, unsigned int tag) |
365 |
lefcha |
1.1 |
{ |
366 |
lefcha |
1.19 |
int r = RESPONSE_OK; |
367 |
lefcha |
1.20 |
char buf[RESPONSE_BUF]; |
368 |
lefcha |
1.21 |
|
369 |
lefcha |
1.20 |
reset_vbuf(); |
370 |
lefcha |
1.1 |
|
371 |
lefcha |
1.20 |
do { |
372 |
|
|
receive_response(sock, buf); |
373 |
lefcha |
1.23.2.3 |
bye_response(buf); |
374 |
lefcha |
1.21 |
check_vbuf(strlen(buf)); |
375 |
lefcha |
1.20 |
strncat(vbuf, buf, vbufs - strlen(vbuf)); |
376 |
|
|
} while (!strcasestr(buf, ultostr(tag, 16))); |
377 |
lefcha |
1.1 |
|
378 |
lefcha |
1.19 |
if ((r = analyze_response(buf)) == RESPONSE_NO && |
379 |
lefcha |
1.20 |
strcasestr(vbuf, "[TRYCREATE]")) |
380 |
lefcha |
1.9 |
return RESPONSE_TRYCREATE; |
381 |
lefcha |
1.1 |
|
382 |
lefcha |
1.19 |
return r; |
383 |
lefcha |
1.1 |
} |
384 |
|
|
|
385 |
|
|
|
386 |
|
|
/* |
387 |
lefcha |
1.3 |
* Check if response of server to client's request was succesfully |
388 |
lefcha |
1.1 |
* delivered or there was some kind of error. |
389 |
|
|
*/ |
390 |
lefcha |
1.14 |
int analyze_response(char *buf) |
391 |
lefcha |
1.1 |
{ |
392 |
lefcha |
1.9 |
int r = RESPONSE_OK; |
393 |
lefcha |
1.1 |
regex_t creg; |
394 |
|
|
regmatch_t match[3]; |
395 |
lefcha |
1.9 |
const char *reg = "[[:xdigit:]]{6,6} ((OK|NO|BAD)[[:print:]]*)\r\n"; |
396 |
lefcha |
1.14 |
char result[RESULT_BUF]; |
397 |
lefcha |
1.1 |
|
398 |
lefcha |
1.4 |
result[0] = 0; |
399 |
|
|
|
400 |
lefcha |
1.9 |
regcomp(&creg, reg, REG_EXTENDED | REG_ICASE); |
401 |
lefcha |
1.6 |
|
402 |
lefcha |
1.14 |
if (!regexec(&creg, buf, 3, match, 0)) { |
403 |
|
|
strncat(result, buf + match[1].rm_so, |
404 |
|
|
min(match[1].rm_eo - match[1].rm_so, RESULT_BUF - 1)); |
405 |
lefcha |
1.1 |
|
406 |
lefcha |
1.22 |
if (!strncasecmp(buf + match[2].rm_so, "NO", 2)) |
407 |
lefcha |
1.9 |
r = RESPONSE_NO; |
408 |
lefcha |
1.22 |
else if (!strncasecmp(buf + match[2].rm_so, "BAD", 3)) |
409 |
lefcha |
1.9 |
r = RESPONSE_BAD; |
410 |
lefcha |
1.6 |
|
411 |
lefcha |
1.1 |
verbose("Server response: %s\n", result); |
412 |
lefcha |
1.20 |
} else |
413 |
|
|
r = RESPONSE_NONE; |
414 |
lefcha |
1.21 |
|
415 |
lefcha |
1.6 |
regfree(&creg); |
416 |
lefcha |
1.1 |
|
417 |
|
|
return r; |
418 |
lefcha |
1.20 |
} |
419 |
|
|
|
420 |
|
|
|
421 |
|
|
/* |
422 |
|
|
* Initialize virtual buffer. |
423 |
|
|
*/ |
424 |
|
|
void init_vbuf(void) |
425 |
|
|
{ |
426 |
lefcha |
1.23.2.2 |
vbuf = xmalloc(VIRTUAL_BUF); |
427 |
lefcha |
1.20 |
*vbuf = 0; |
428 |
lefcha |
1.23.2.2 |
vbufs = VIRTUAL_BUF; |
429 |
lefcha |
1.20 |
} |
430 |
|
|
|
431 |
|
|
|
432 |
|
|
/* |
433 |
|
|
* Reset virtual buffer. |
434 |
|
|
*/ |
435 |
|
|
void reset_vbuf(void) |
436 |
|
|
{ |
437 |
|
|
*vbuf = 0; |
438 |
|
|
} |
439 |
|
|
|
440 |
|
|
|
441 |
|
|
/* |
442 |
|
|
* Check if virtual buffer is full and make it bigger. |
443 |
|
|
*/ |
444 |
|
|
void check_vbuf(size_t n) |
445 |
|
|
{ |
446 |
|
|
if (n + strlen(vbuf) >= vbufs) { |
447 |
lefcha |
1.23.2.2 |
vbufs += VIRTUAL_BUF; |
448 |
lefcha |
1.20 |
vbuf = xrealloc(vbuf, vbufs); |
449 |
|
|
} |
450 |
lefcha |
1.1 |
} |