| 1 |
#include <stdio.h> |
| 2 |
#include <unistd.h> |
| 3 |
#include <stdlib.h> |
| 4 |
#include <ctype.h> |
| 5 |
#include <errno.h> |
| 6 |
#include <string.h> |
| 7 |
#include <fcntl.h> |
| 8 |
#include <sys/time.h> |
| 9 |
#include <sys/types.h> |
| 10 |
#include <regex.h> |
| 11 |
|
| 12 |
|
| 13 |
#include "config.h" |
| 14 |
#include "imapfilter.h" |
| 15 |
|
| 16 |
|
| 17 |
extern int sock; |
| 18 |
extern unsigned int options; |
| 19 |
|
| 20 |
|
| 21 |
/* |
| 22 |
* Read data the server sent. |
| 23 |
*/ |
| 24 |
int receive_response(char *buf) |
| 25 |
{ |
| 26 |
int flags; |
| 27 |
fd_set fds; |
| 28 |
struct timeval tv; |
| 29 |
|
| 30 |
memset(buf, 0, RESPONSE_BUF); |
| 31 |
|
| 32 |
tv.tv_sec = 20; |
| 33 |
tv.tv_usec = 0; |
| 34 |
|
| 35 |
flags = fcntl(sock, F_GETFL, 0); |
| 36 |
fcntl(sock, F_SETFL, flags | O_NONBLOCK); |
| 37 |
|
| 38 |
FD_ZERO(&fds); |
| 39 |
FD_SET(sock, &fds); |
| 40 |
|
| 41 |
if ((select(sock + 1, &fds, NULL, NULL, &tv) > 0) |
| 42 |
&& FD_ISSET(sock, &fds)) { |
| 43 |
if (read(sock, buf, RESPONSE_BUF - 1) != -1) { |
| 44 |
#ifdef DEBUG |
| 45 |
printf("\n%s\n", buf); |
| 46 |
#endif |
| 47 |
fcntl(sock, F_SETFL, flags); |
| 48 |
|
| 49 |
return analyze_response(buf); |
| 50 |
} |
| 51 |
} |
| 52 |
fcntl(sock, F_SETFL, flags); |
| 53 |
|
| 54 |
fatal(ERROR_NETWORK, "imapfilter: waiting input from socket; %s\n", |
| 55 |
strerror(errno)); |
| 56 |
|
| 57 |
return ERROR_NETWORK; |
| 58 |
} |
| 59 |
|
| 60 |
|
| 61 |
/* |
| 62 |
* Get server response to client's request. |
| 63 |
*/ |
| 64 |
int server_response(unsigned int tag) |
| 65 |
{ |
| 66 |
int r; |
| 67 |
char buf[RESPONSE_BUF]; |
| 68 |
|
| 69 |
do |
| 70 |
r = receive_response(buf); |
| 71 |
while (tag && !strcasestr(buf, ultostr(tag, 16))); |
| 72 |
|
| 73 |
return r; |
| 74 |
} |
| 75 |
|
| 76 |
|
| 77 |
/* |
| 78 |
* Process the greeting that server sends during connection. |
| 79 |
*/ |
| 80 |
int greeting_response(void) |
| 81 |
{ |
| 82 |
char buf[RESPONSE_BUF]; |
| 83 |
|
| 84 |
receive_response(buf); |
| 85 |
|
| 86 |
if (strcasestr(buf, "BYE")) |
| 87 |
return RESPONSE_BYE; |
| 88 |
|
| 89 |
return RESPONSE_OK; |
| 90 |
} |
| 91 |
|
| 92 |
/* |
| 93 |
* Process the data that server sent due to IMAP CAPABILITY client request. |
| 94 |
*/ |
| 95 |
int capability_response(unsigned int tag) |
| 96 |
{ |
| 97 |
int r; |
| 98 |
char buf[RESPONSE_BUF]; |
| 99 |
|
| 100 |
do |
| 101 |
r = receive_response(buf); |
| 102 |
while (!strcasestr(buf, ultostr(tag, 16))); |
| 103 |
|
| 104 |
if (!strcasestr(buf, "IMAP4rev1")) { |
| 105 |
error("imapfilter: server does not support IMAP4rev1 protocol\n"); |
| 106 |
return -2; |
| 107 |
} |
| 108 |
return r; |
| 109 |
} |
| 110 |
|
| 111 |
|
| 112 |
/* |
| 113 |
* Process the data that server sent due to IMAP STATUS client request. |
| 114 |
*/ |
| 115 |
int status_response(unsigned int tag) |
| 116 |
{ |
| 117 |
int r; |
| 118 |
char buf[RESPONSE_BUF]; |
| 119 |
unsigned int exist, recent, unseen; |
| 120 |
char *c; |
| 121 |
|
| 122 |
exist = recent = unseen = 0; |
| 123 |
|
| 124 |
do |
| 125 |
r = receive_response(buf); |
| 126 |
while (!strcasestr(buf, ultostr(tag, 16))); |
| 127 |
|
| 128 |
if ((c = strcasestr(buf, "MESSAGES"))) { |
| 129 |
c += 9; |
| 130 |
exist = strtoul(c, NULL, 10); |
| 131 |
} |
| 132 |
if ((c = strcasestr(buf, "RECENT"))) { |
| 133 |
c += 7; |
| 134 |
recent = strtoul(c, NULL, 10); |
| 135 |
} |
| 136 |
if ((c = strcasestr(buf, "UNSEEN"))) { |
| 137 |
c += 7; |
| 138 |
unseen = strtoul(c, NULL, 10); |
| 139 |
} |
| 140 |
if (!exist) { |
| 141 |
info("No messages "); |
| 142 |
return -2; |
| 143 |
} |
| 144 |
info("%d message%s, %d recent, %d unseen, ", exist, plural(exist), |
| 145 |
recent, unseen); |
| 146 |
|
| 147 |
return r; |
| 148 |
} |
| 149 |
|
| 150 |
|
| 151 |
/* |
| 152 |
* Process the data that server sent due to IMAP SELECT client request. |
| 153 |
*/ |
| 154 |
int select_response(unsigned int tag) |
| 155 |
{ |
| 156 |
int r; |
| 157 |
char buf[RESPONSE_BUF]; |
| 158 |
|
| 159 |
do |
| 160 |
r = receive_response(buf); |
| 161 |
while (!strcasestr(buf, ultostr(tag, 16))); |
| 162 |
|
| 163 |
if (strcasestr(buf, "[READ-ONLY]")) |
| 164 |
return RESPONSE_READONLY; |
| 165 |
|
| 166 |
return r; |
| 167 |
} |
| 168 |
|
| 169 |
|
| 170 |
/* |
| 171 |
* Process the data that server sent due to IMAP SEARCH client request. |
| 172 |
*/ |
| 173 |
int search_response(unsigned int tag, char *mesgs) |
| 174 |
{ |
| 175 |
int r; |
| 176 |
char buf[RESPONSE_BUF]; |
| 177 |
char *c, *m = mesgs; |
| 178 |
|
| 179 |
do |
| 180 |
r = receive_response(buf); |
| 181 |
while (!strcasestr(buf, ultostr(tag, 16))); |
| 182 |
|
| 183 |
if ((c = strcasestr(buf, "SEARCH "))) { |
| 184 |
c += 7; |
| 185 |
while (m - mesgs < SEARCH_MESSAGES_BUF && (isdigit(*c) || *c == ' ')) |
| 186 |
*(m++) = *(c++); |
| 187 |
*m = 0; |
| 188 |
} |
| 189 |
|
| 190 |
return r; |
| 191 |
} |
| 192 |
|
| 193 |
|
| 194 |
/* |
| 195 |
* Process the data that server sent due to IMAP FETCH client request. |
| 196 |
*/ |
| 197 |
int fetch_response(unsigned int tag) |
| 198 |
{ |
| 199 |
int r, s, i; |
| 200 |
char buf[RESPONSE_BUF]; |
| 201 |
char *pos; |
| 202 |
char headers[HEADERS_BUF]; |
| 203 |
|
| 204 |
headers[0] = 0; |
| 205 |
|
| 206 |
do |
| 207 |
r = receive_response(buf); |
| 208 |
while (!strcasestr(buf, ultostr(tag, 16))); |
| 209 |
|
| 210 |
pos = buf; |
| 211 |
|
| 212 |
while ((pos = strchr(pos, '{'))) { |
| 213 |
s = atoi(pos + 1); |
| 214 |
pos = strchr(pos, '}'); |
| 215 |
|
| 216 |
for (i = 0; i < HEADERS_BUF - 1 && i < s - 2; i++) |
| 217 |
headers[i] = *(pos + 3 + i); |
| 218 |
|
| 219 |
headers[i] = 0; |
| 220 |
|
| 221 |
if (*headers) { |
| 222 |
if (options & OPTION_HEADERS) |
| 223 |
info("%s\n", headers); |
| 224 |
log_info(LOG_WRITE, headers); |
| 225 |
} else |
| 226 |
log_info(LOG_WRITE, NULL); |
| 227 |
} |
| 228 |
|
| 229 |
return r; |
| 230 |
} |
| 231 |
|
| 232 |
|
| 233 |
/* |
| 234 |
* Process the data that server sent due to IMAP COPY client request. |
| 235 |
*/ |
| 236 |
int copy_response(unsigned int tag) |
| 237 |
{ |
| 238 |
int r; |
| 239 |
char buf[RESPONSE_BUF]; |
| 240 |
|
| 241 |
do |
| 242 |
r = receive_response(buf); |
| 243 |
while (!strcasestr(buf, ultostr(tag, 16))); |
| 244 |
|
| 245 |
if (r == RESPONSE_NO && strcasestr(buf, "[TRYCREATE]")) |
| 246 |
return RESPONSE_TRYCREATE; |
| 247 |
|
| 248 |
return RESPONSE_OK; |
| 249 |
} |
| 250 |
|
| 251 |
|
| 252 |
/* |
| 253 |
* Check if response of server to client's request was succesfully |
| 254 |
* delivered or there was some kind of error. |
| 255 |
*/ |
| 256 |
int analyze_response(char *buf) |
| 257 |
{ |
| 258 |
int r = RESPONSE_OK; |
| 259 |
regex_t creg; |
| 260 |
regmatch_t match[3]; |
| 261 |
const char *reg = "[[:xdigit:]]{6,6} ((OK|NO|BAD)[[:print:]]*)\r\n"; |
| 262 |
char result[RESULT_BUF]; |
| 263 |
|
| 264 |
result[0] = 0; |
| 265 |
|
| 266 |
regcomp(&creg, reg, REG_EXTENDED | REG_ICASE); |
| 267 |
|
| 268 |
if (!regexec(&creg, buf, 3, match, 0)) { |
| 269 |
strncat(result, buf + match[1].rm_so, |
| 270 |
min(match[1].rm_eo - match[1].rm_so, RESULT_BUF - 1)); |
| 271 |
|
| 272 |
if (!strncasecmp(buf + match[2].rm_so, "NO", 2)) |
| 273 |
r = RESPONSE_NO; |
| 274 |
else if (!strncasecmp(buf + match[2].rm_so, "BAD", 3)) |
| 275 |
r = RESPONSE_BAD; |
| 276 |
|
| 277 |
verbose("Server response: %s\n", result); |
| 278 |
} |
| 279 |
regfree(&creg); |
| 280 |
|
| 281 |
return r; |
| 282 |
} |
Parent Directory
| 
Revision Log