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> |
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#include <sys/types.h> |
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#include <regex.h> |
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11 |
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#include "config.h" |
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#include "imapfilter.h" |
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14 |
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15 |
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extern unsigned int options; |
16 |
lefcha |
1.17.2.1 |
extern unsigned int capabilities; |
17 |
lefcha |
1.1 |
|
18 |
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|
19 |
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/* |
20 |
lefcha |
1.14 |
* Read one packet of data that the server sent. |
21 |
lefcha |
1.1 |
*/ |
22 |
lefcha |
1.14 |
void receive_response(char *buf) |
23 |
lefcha |
1.1 |
{ |
24 |
lefcha |
1.14 |
socket_read(buf); |
25 |
lefcha |
1.1 |
|
26 |
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#ifdef DEBUG |
27 |
lefcha |
1.14 |
printf("\n%s\n", buf); |
28 |
lefcha |
1.1 |
#endif |
29 |
lefcha |
1.11 |
|
30 |
lefcha |
1.1 |
} |
31 |
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32 |
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33 |
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/* |
34 |
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* Get server response to client's request. |
35 |
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*/ |
36 |
lefcha |
1.9 |
int server_response(unsigned int tag) |
37 |
lefcha |
1.1 |
{ |
38 |
lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
39 |
lefcha |
1.6 |
|
40 |
lefcha |
1.4 |
do |
41 |
lefcha |
1.14 |
receive_response(buf); |
42 |
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while (tag && !strcasestr(buf, ultostr(tag, 16))); |
43 |
lefcha |
1.6 |
|
44 |
lefcha |
1.14 |
return analyze_response(buf); |
45 |
lefcha |
1.1 |
} |
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47 |
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48 |
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/* |
49 |
lefcha |
1.9 |
* Process the greeting that server sends during connection. |
50 |
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*/ |
51 |
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int greeting_response(void) |
52 |
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{ |
53 |
lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
54 |
lefcha |
1.9 |
|
55 |
lefcha |
1.14 |
receive_response(buf); |
56 |
lefcha |
1.9 |
|
57 |
lefcha |
1.14 |
if (strcasestr(buf, "BYE")) |
58 |
lefcha |
1.9 |
return RESPONSE_BYE; |
59 |
lefcha |
1.14 |
else if (strcasestr(buf, "PREAUTH")) |
60 |
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return RESPONSE_PREAUTH; |
61 |
lefcha |
1.9 |
|
62 |
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return RESPONSE_OK; |
63 |
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} |
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65 |
lefcha |
1.13 |
|
66 |
lefcha |
1.9 |
/* |
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* Process the data that server sent due to IMAP CAPABILITY client request. |
68 |
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*/ |
69 |
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int capability_response(unsigned int tag) |
70 |
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{ |
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lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
72 |
lefcha |
1.9 |
|
73 |
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do |
74 |
lefcha |
1.14 |
receive_response(buf); |
75 |
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while (!strcasestr(buf, ultostr(tag, 16))); |
76 |
lefcha |
1.9 |
|
77 |
lefcha |
1.14 |
if (!strcasestr(buf, "IMAP4rev1")) { |
78 |
lefcha |
1.9 |
error("imapfilter: server does not support IMAP4rev1 protocol\n"); |
79 |
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return -2; |
80 |
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} |
81 |
lefcha |
1.17.2.1 |
if (strcasestr(buf, "NAMESPACE")) |
82 |
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capabilities |= CAPABILITY_NAMESPACE; |
83 |
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|
84 |
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return analyze_response(buf); |
85 |
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} |
86 |
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87 |
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88 |
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/* |
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* Process the data that server sent due to IMAP NAMESPACE client request. |
90 |
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*/ |
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int namespace_response(unsigned int tag, struct namespace_t * namesp) |
92 |
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{ |
93 |
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char buf[RESPONSE_BUF]; |
94 |
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char *c, *d; |
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96 |
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do |
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receive_response(buf); |
98 |
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while (!strcasestr(buf, ultostr(tag, 16))); |
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if ((c = strcasestr(buf, "* NAMESPACE"))) { |
101 |
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c += 12; |
102 |
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if (strncasecmp(c, "NIL", 3)) { |
103 |
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c = strchr(c, '"') + 1; |
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d = strchr(c, '"') + 1; |
105 |
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strncat(namesp->prefix, c, d - c - 1); |
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namesp->delim = *(strchr(d, '"') + 1); |
108 |
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} |
109 |
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} |
110 |
lefcha |
1.14 |
return analyze_response(buf); |
111 |
lefcha |
1.9 |
} |
112 |
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113 |
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114 |
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/* |
115 |
lefcha |
1.3 |
* Process the data that server sent due to IMAP STATUS client request. |
116 |
lefcha |
1.1 |
*/ |
117 |
lefcha |
1.16 |
int status_response(unsigned int tag, char *mbox) |
118 |
lefcha |
1.1 |
{ |
119 |
lefcha |
1.17 |
int r; |
120 |
lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
121 |
lefcha |
1.1 |
unsigned int exist, recent, unseen; |
122 |
lefcha |
1.9 |
char *c; |
123 |
lefcha |
1.1 |
|
124 |
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exist = recent = unseen = 0; |
125 |
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126 |
lefcha |
1.14 |
do |
127 |
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receive_response(buf); |
128 |
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while (!strcasestr(buf, ultostr(tag, 16))); |
129 |
lefcha |
1.13 |
|
130 |
lefcha |
1.17 |
r = analyze_response(buf); |
131 |
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132 |
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if (r == RESPONSE_NO) |
133 |
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return -2; |
134 |
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135 |
lefcha |
1.14 |
if ((c = strcasestr(buf, "MESSAGES"))) { |
136 |
lefcha |
1.9 |
c += 9; |
137 |
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exist = strtoul(c, NULL, 10); |
138 |
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} |
139 |
lefcha |
1.14 |
if ((c = strcasestr(buf, "RECENT"))) { |
140 |
lefcha |
1.9 |
c += 7; |
141 |
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recent = strtoul(c, NULL, 10); |
142 |
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} |
143 |
lefcha |
1.14 |
if ((c = strcasestr(buf, "UNSEEN"))) { |
144 |
lefcha |
1.9 |
c += 7; |
145 |
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unseen = strtoul(c, NULL, 10); |
146 |
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} |
147 |
lefcha |
1.8 |
if (!exist) { |
148 |
lefcha |
1.17.2.3 |
info("No messages in mailbox \"%s\".\n", mbox); |
149 |
lefcha |
1.8 |
return -2; |
150 |
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} |
151 |
lefcha |
1.17.2.2 |
info("%d message%s, %d recent, %d unseen, in mailbox \"%s\".\n", exist, |
152 |
lefcha |
1.17.2.1 |
plural(exist), recent, unseen, mbox); |
153 |
lefcha |
1.9 |
|
154 |
lefcha |
1.17 |
return r; |
155 |
lefcha |
1.9 |
} |
156 |
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157 |
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158 |
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/* |
159 |
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* Process the data that server sent due to IMAP SELECT client request. |
160 |
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*/ |
161 |
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int select_response(unsigned int tag) |
162 |
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{ |
163 |
lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
164 |
lefcha |
1.9 |
|
165 |
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do |
166 |
lefcha |
1.14 |
receive_response(buf); |
167 |
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while (!strcasestr(buf, ultostr(tag, 16))); |
168 |
lefcha |
1.9 |
|
169 |
lefcha |
1.14 |
if (strcasestr(buf, "[READ-ONLY]")) |
170 |
lefcha |
1.9 |
return RESPONSE_READONLY; |
171 |
lefcha |
1.1 |
|
172 |
lefcha |
1.14 |
return analyze_response(buf); |
173 |
lefcha |
1.1 |
} |
174 |
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175 |
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176 |
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/* |
177 |
lefcha |
1.3 |
* Process the data that server sent due to IMAP SEARCH client request. |
178 |
lefcha |
1.1 |
*/ |
179 |
lefcha |
1.13 |
int search_response(unsigned int tag, char **mesgs) |
180 |
lefcha |
1.1 |
{ |
181 |
lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
182 |
lefcha |
1.13 |
char *c, *m; |
183 |
lefcha |
1.17 |
int f; |
184 |
lefcha |
1.15 |
unsigned int blen, mlen; |
185 |
lefcha |
1.13 |
|
186 |
lefcha |
1.14 |
f = blen = mlen = 0; |
187 |
lefcha |
1.1 |
|
188 |
lefcha |
1.13 |
do { |
189 |
lefcha |
1.14 |
receive_response(buf); |
190 |
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191 |
lefcha |
1.16 |
if (f) { /* Search results are continued from |
192 |
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previous packet. */ |
193 |
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c = buf; |
194 |
lefcha |
1.14 |
blen = strlen(buf); |
195 |
lefcha |
1.16 |
mlen = strlen(*mesgs); |
196 |
lefcha |
1.14 |
|
197 |
lefcha |
1.16 |
*mesgs = (char *) xrealloc(*mesgs, mlen + blen + 1); |
198 |
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m = *mesgs + mlen; |
199 |
lefcha |
1.14 |
|
200 |
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while (*c && (isdigit(*c) || *c == ' ')) |
201 |
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*(m++) = *(c++); |
202 |
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*m = 0; |
203 |
lefcha |
1.16 |
} else if ((c = strcasestr(buf, "* SEARCH "))) { |
204 |
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f = 1; |
205 |
lefcha |
1.14 |
blen = strlen(buf); |
206 |
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207 |
lefcha |
1.16 |
m = *mesgs = (char *) xmalloc(blen + 1); |
208 |
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c += 9; |
209 |
lefcha |
1.14 |
|
210 |
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while (*c && (isdigit(*c) || *c == ' ')) |
211 |
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*(m++) = *(c++); |
212 |
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*m = 0; |
213 |
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} |
214 |
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} while (!strcasestr(buf, ultostr(tag, 16))); |
215 |
lefcha |
1.1 |
|
216 |
lefcha |
1.14 |
return analyze_response(buf); |
217 |
lefcha |
1.1 |
} |
218 |
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219 |
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220 |
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/* |
221 |
lefcha |
1.3 |
* Process the data that server sent due to IMAP FETCH client request. |
222 |
lefcha |
1.1 |
*/ |
223 |
lefcha |
1.9 |
int fetch_response(unsigned int tag) |
224 |
lefcha |
1.1 |
{ |
225 |
lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
226 |
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char hdrs[HEADERS_BUF]; |
227 |
lefcha |
1.17 |
int f; |
228 |
lefcha |
1.15 |
unsigned int sa, sb, i, n; |
229 |
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char s[8]; |
230 |
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char *b; |
231 |
lefcha |
1.14 |
|
232 |
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hdrs[0] = 0; |
233 |
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sa = sb = i = f = 0; |
234 |
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s[0] = 0; |
235 |
lefcha |
1.6 |
|
236 |
lefcha |
1.13 |
do { |
237 |
lefcha |
1.14 |
receive_response(buf); |
238 |
lefcha |
1.13 |
|
239 |
lefcha |
1.14 |
b = buf; |
240 |
lefcha |
1.6 |
|
241 |
lefcha |
1.14 |
while (f || (b = strchr(b, '{'))) { |
242 |
lefcha |
1.15 |
/* Headers are continued from previous packet. */ |
243 |
lefcha |
1.14 |
if (f) { |
244 |
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f = 0; |
245 |
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for (; i < HEADERS_BUF - 1 && i < sa - 2; i++) { |
246 |
lefcha |
1.15 |
/* Continued in next packet. */ |
247 |
lefcha |
1.14 |
if (!*b) { |
248 |
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f = 1; |
249 |
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break; |
250 |
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} |
251 |
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hdrs[i] = *(b++); |
252 |
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} |
253 |
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} else { |
254 |
lefcha |
1.15 |
/* Left bracket is last byte of buffer. */ |
255 |
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if (b == buf + RESPONSE_BUF - 2) { |
256 |
lefcha |
1.14 |
receive_response(buf); |
257 |
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b = buf; |
258 |
lefcha |
1.15 |
} else |
259 |
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b++; |
260 |
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|
261 |
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sa = atoi(b); |
262 |
lefcha |
1.14 |
|
263 |
lefcha |
1.15 |
/* Headers length may be continued in next packet. */ |
264 |
lefcha |
1.14 |
if (!(b = strchr(b, '}'))) { |
265 |
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receive_response(buf); |
266 |
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if (buf != (b = strchr(buf, '}'))) { |
267 |
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sb = atoi(buf); |
268 |
lefcha |
1.15 |
strncat(s, ultostr(sa, 10), 7); |
269 |
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strncat(s, ultostr(sb, 10), 7); |
270 |
lefcha |
1.14 |
sa = atoi(s); |
271 |
lefcha |
1.15 |
s[0] = 0; |
272 |
lefcha |
1.14 |
} |
273 |
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b += 3; |
274 |
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} else if ((n = RESPONSE_BUF - 1 - (b - buf)) < 3) { |
275 |
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receive_response(buf); |
276 |
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b = buf + 3 - n; |
277 |
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} else { |
278 |
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b += 3; |
279 |
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} |
280 |
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281 |
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for (i = 0; i < HEADERS_BUF - 1 && i < sa - 2; i++) { |
282 |
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if (!*b) { |
283 |
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f = 1; |
284 |
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break; |
285 |
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} |
286 |
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hdrs[i] = *(b++); |
287 |
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} |
288 |
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} |
289 |
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290 |
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if (!f) { |
291 |
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hdrs[i] = 0; |
292 |
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293 |
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if (*hdrs) { |
294 |
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if (options & OPTION_HEADERS) |
295 |
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info("%s\n", hdrs); |
296 |
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log_info(LOG_WRITE, hdrs); |
297 |
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} else { |
298 |
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log_info(LOG_WRITE, NULL); |
299 |
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} |
300 |
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} else { |
301 |
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break; |
302 |
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} |
303 |
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} |
304 |
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} while (!strcasestr(buf, ultostr(tag, 16))); |
305 |
lefcha |
1.6 |
|
306 |
lefcha |
1.14 |
return analyze_response(buf); |
307 |
lefcha |
1.1 |
} |
308 |
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|
309 |
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|
310 |
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/* |
311 |
lefcha |
1.3 |
* Process the data that server sent due to IMAP COPY client request. |
312 |
lefcha |
1.1 |
*/ |
313 |
lefcha |
1.9 |
int copy_response(unsigned int tag) |
314 |
lefcha |
1.1 |
{ |
315 |
lefcha |
1.17.2.2 |
int r = RESPONSE_OK; |
316 |
lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
317 |
lefcha |
1.1 |
|
318 |
|
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do |
319 |
lefcha |
1.14 |
receive_response(buf); |
320 |
|
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while (!strcasestr(buf, ultostr(tag, 16))); |
321 |
lefcha |
1.1 |
|
322 |
lefcha |
1.17.2.2 |
if ((r = analyze_response(buf)) == RESPONSE_NO |
323 |
lefcha |
1.17.2.1 |
&& strcasestr(buf, "[TRYCREATE]")) |
324 |
lefcha |
1.9 |
return RESPONSE_TRYCREATE; |
325 |
lefcha |
1.17.2.2 |
|
326 |
|
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return r; |
327 |
lefcha |
1.1 |
} |
328 |
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|
329 |
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|
330 |
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/* |
331 |
lefcha |
1.3 |
* Check if response of server to client's request was succesfully |
332 |
lefcha |
1.1 |
* delivered or there was some kind of error. |
333 |
|
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*/ |
334 |
lefcha |
1.14 |
int analyze_response(char *buf) |
335 |
lefcha |
1.1 |
{ |
336 |
lefcha |
1.9 |
int r = RESPONSE_OK; |
337 |
lefcha |
1.1 |
regex_t creg; |
338 |
|
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regmatch_t match[3]; |
339 |
lefcha |
1.9 |
const char *reg = "[[:xdigit:]]{6,6} ((OK|NO|BAD)[[:print:]]*)\r\n"; |
340 |
lefcha |
1.14 |
char result[RESULT_BUF]; |
341 |
lefcha |
1.1 |
|
342 |
lefcha |
1.4 |
result[0] = 0; |
343 |
|
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|
344 |
lefcha |
1.9 |
regcomp(&creg, reg, REG_EXTENDED | REG_ICASE); |
345 |
lefcha |
1.6 |
|
346 |
lefcha |
1.14 |
if (!regexec(&creg, buf, 3, match, 0)) { |
347 |
|
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strncat(result, buf + match[1].rm_so, |
348 |
|
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min(match[1].rm_eo - match[1].rm_so, RESULT_BUF - 1)); |
349 |
lefcha |
1.1 |
|
350 |
lefcha |
1.14 |
if (!strncasecmp(buf + match[2].rm_so, "NO", 2)) |
351 |
lefcha |
1.9 |
r = RESPONSE_NO; |
352 |
lefcha |
1.14 |
else if (!strncasecmp(buf + match[2].rm_so, "BAD", 3)) |
353 |
lefcha |
1.9 |
r = RESPONSE_BAD; |
354 |
lefcha |
1.6 |
|
355 |
lefcha |
1.1 |
verbose("Server response: %s\n", result); |
356 |
|
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} |
357 |
lefcha |
1.6 |
regfree(&creg); |
358 |
lefcha |
1.1 |
|
359 |
|
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return r; |
360 |
|
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} |