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lefcha |
1.1 |
#include <stdio.h> |
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#include <unistd.h> |
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#include <stdlib.h> |
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lefcha |
1.9 |
#include <ctype.h> |
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lefcha |
1.4 |
#include <errno.h> |
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lefcha |
1.1 |
#include <string.h> |
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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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#include "config.h" |
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#include "imapfilter.h" |
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extern unsigned int options; |
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/* |
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1.14 |
* Read one packet of data that the server sent. |
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lefcha |
1.1 |
*/ |
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lefcha |
1.14 |
void receive_response(char *buf) |
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lefcha |
1.1 |
{ |
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1.14 |
socket_read(buf); |
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lefcha |
1.1 |
|
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#ifdef DEBUG |
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1.14 |
printf("\n%s\n", buf); |
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1.1 |
#endif |
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lefcha |
1.11 |
|
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lefcha |
1.1 |
} |
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/* |
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* Get server response to client's request. |
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*/ |
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lefcha |
1.9 |
int server_response(unsigned int tag) |
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lefcha |
1.1 |
{ |
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1.14 |
char buf[RESPONSE_BUF]; |
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lefcha |
1.6 |
|
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1.4 |
do |
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1.14 |
receive_response(buf); |
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while (tag && !strcasestr(buf, ultostr(tag, 16))); |
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lefcha |
1.6 |
|
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lefcha |
1.14 |
return analyze_response(buf); |
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lefcha |
1.1 |
} |
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/* |
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lefcha |
1.9 |
* Process the greeting that server sends during connection. |
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*/ |
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int greeting_response(void) |
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{ |
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1.14 |
char buf[RESPONSE_BUF]; |
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lefcha |
1.9 |
|
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lefcha |
1.14 |
receive_response(buf); |
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lefcha |
1.9 |
|
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lefcha |
1.14 |
if (strcasestr(buf, "BYE")) |
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lefcha |
1.9 |
return RESPONSE_BYE; |
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lefcha |
1.14 |
else if (strcasestr(buf, "PREAUTH")) |
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return RESPONSE_PREAUTH; |
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lefcha |
1.9 |
|
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return RESPONSE_OK; |
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} |
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lefcha |
1.13 |
|
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lefcha |
1.9 |
/* |
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* Process the data that server sent due to IMAP CAPABILITY client request. |
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*/ |
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int capability_response(unsigned int tag) |
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{ |
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lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
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lefcha |
1.9 |
|
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do |
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lefcha |
1.14 |
receive_response(buf); |
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while (!strcasestr(buf, ultostr(tag, 16))); |
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lefcha |
1.9 |
|
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lefcha |
1.14 |
if (!strcasestr(buf, "IMAP4rev1")) { |
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lefcha |
1.9 |
error("imapfilter: server does not support IMAP4rev1 protocol\n"); |
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return -2; |
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} |
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lefcha |
1.14 |
return analyze_response(buf); |
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lefcha |
1.9 |
} |
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/* |
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lefcha |
1.3 |
* Process the data that server sent due to IMAP STATUS client request. |
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lefcha |
1.1 |
*/ |
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lefcha |
1.9 |
int status_response(unsigned int tag) |
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lefcha |
1.1 |
{ |
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lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
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lefcha |
1.1 |
unsigned int exist, recent, unseen; |
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lefcha |
1.9 |
char *c; |
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lefcha |
1.1 |
|
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exist = recent = unseen = 0; |
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lefcha |
1.14 |
do |
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receive_response(buf); |
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while (!strcasestr(buf, ultostr(tag, 16))); |
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lefcha |
1.13 |
|
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lefcha |
1.14 |
if ((c = strcasestr(buf, "MESSAGES"))) { |
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lefcha |
1.9 |
c += 9; |
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exist = strtoul(c, NULL, 10); |
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} |
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1.14 |
if ((c = strcasestr(buf, "RECENT"))) { |
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1.9 |
c += 7; |
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recent = strtoul(c, NULL, 10); |
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} |
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lefcha |
1.14 |
if ((c = strcasestr(buf, "UNSEEN"))) { |
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1.9 |
c += 7; |
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unseen = strtoul(c, NULL, 10); |
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} |
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1.8 |
if (!exist) { |
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info("No messages "); |
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return -2; |
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} |
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1.9 |
info("%d message%s, %d recent, %d unseen, ", exist, plural(exist), |
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recent, unseen); |
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lefcha |
1.14 |
return analyze_response(buf); |
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lefcha |
1.9 |
} |
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/* |
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* Process the data that server sent due to IMAP SELECT client request. |
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*/ |
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int select_response(unsigned int tag) |
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{ |
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1.14 |
char buf[RESPONSE_BUF]; |
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lefcha |
1.9 |
|
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do |
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lefcha |
1.14 |
receive_response(buf); |
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while (!strcasestr(buf, ultostr(tag, 16))); |
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lefcha |
1.9 |
|
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lefcha |
1.14 |
if (strcasestr(buf, "[READ-ONLY]")) |
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lefcha |
1.9 |
return RESPONSE_READONLY; |
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lefcha |
1.1 |
|
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lefcha |
1.14 |
return analyze_response(buf); |
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lefcha |
1.1 |
} |
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/* |
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lefcha |
1.3 |
* Process the data that server sent due to IMAP SEARCH client request. |
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lefcha |
1.1 |
*/ |
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lefcha |
1.13 |
int search_response(unsigned int tag, char **mesgs) |
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lefcha |
1.1 |
{ |
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lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
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lefcha |
1.13 |
char *c, *m; |
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lefcha |
1.15 |
short f; |
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unsigned int blen, mlen; |
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lefcha |
1.13 |
|
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lefcha |
1.14 |
f = blen = mlen = 0; |
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lefcha |
1.1 |
|
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lefcha |
1.13 |
do { |
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lefcha |
1.14 |
receive_response(buf); |
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if (!f && (c = strcasestr(buf, "* SEARCH "))) { |
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f = 1; |
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blen = strlen(buf); |
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m = *mesgs = (char *) xmalloc(blen + 1); |
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c += 9; |
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while (*c && (isdigit(*c) || *c == ' ')) |
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*(m++) = *(c++); |
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*m = 0; |
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lefcha |
1.15 |
} else { /* Search results are continued from |
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previous packet. */ |
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lefcha |
1.14 |
c = buf; |
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blen = strlen(buf); |
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mlen = strlen(*mesgs); |
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*mesgs = (char *) xrealloc(*mesgs, mlen + blen + 1); |
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m = *mesgs + mlen; |
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while (*c && (isdigit(*c) || *c == ' ')) |
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*(m++) = *(c++); |
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*m = 0; |
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} |
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} while (!strcasestr(buf, ultostr(tag, 16))); |
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lefcha |
1.1 |
|
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lefcha |
1.14 |
return analyze_response(buf); |
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lefcha |
1.1 |
} |
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/* |
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lefcha |
1.3 |
* Process the data that server sent due to IMAP FETCH client request. |
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lefcha |
1.1 |
*/ |
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lefcha |
1.9 |
int fetch_response(unsigned int tag) |
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lefcha |
1.1 |
{ |
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lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
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char hdrs[HEADERS_BUF]; |
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lefcha |
1.15 |
short f; |
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unsigned int sa, sb, i, n; |
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char s[8]; |
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char *b; |
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lefcha |
1.14 |
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hdrs[0] = 0; |
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sa = sb = i = f = 0; |
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s[0] = 0; |
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lefcha |
1.6 |
|
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lefcha |
1.13 |
do { |
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lefcha |
1.14 |
receive_response(buf); |
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lefcha |
1.13 |
|
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lefcha |
1.14 |
b = buf; |
204 |
lefcha |
1.6 |
|
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lefcha |
1.14 |
while (f || (b = strchr(b, '{'))) { |
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lefcha |
1.15 |
/* Headers are continued from previous packet. */ |
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lefcha |
1.14 |
if (f) { |
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f = 0; |
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for (; i < HEADERS_BUF - 1 && i < sa - 2; i++) { |
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lefcha |
1.15 |
/* Continued in next packet. */ |
211 |
lefcha |
1.14 |
if (!*b) { |
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f = 1; |
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break; |
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} |
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hdrs[i] = *(b++); |
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} |
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} else { |
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lefcha |
1.15 |
/* Left bracket is last byte of buffer. */ |
219 |
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if (b == buf + RESPONSE_BUF - 2) { |
220 |
lefcha |
1.14 |
receive_response(buf); |
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b = buf; |
222 |
lefcha |
1.15 |
} else |
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b++; |
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sa = atoi(b); |
226 |
lefcha |
1.14 |
|
227 |
lefcha |
1.15 |
/* Headers length may be continued in next packet. */ |
228 |
lefcha |
1.14 |
if (!(b = strchr(b, '}'))) { |
229 |
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receive_response(buf); |
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if (buf != (b = strchr(buf, '}'))) { |
231 |
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sb = atoi(buf); |
232 |
lefcha |
1.15 |
strncat(s, ultostr(sa, 10), 7); |
233 |
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strncat(s, ultostr(sb, 10), 7); |
234 |
lefcha |
1.14 |
sa = atoi(s); |
235 |
lefcha |
1.15 |
s[0] = 0; |
236 |
lefcha |
1.14 |
} |
237 |
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b += 3; |
238 |
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} else if ((n = RESPONSE_BUF - 1 - (b - buf)) < 3) { |
239 |
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receive_response(buf); |
240 |
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b = buf + 3 - n; |
241 |
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} else { |
242 |
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b += 3; |
243 |
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} |
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for (i = 0; i < HEADERS_BUF - 1 && i < sa - 2; i++) { |
246 |
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if (!*b) { |
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f = 1; |
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break; |
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} |
250 |
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hdrs[i] = *(b++); |
251 |
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} |
252 |
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} |
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254 |
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if (!f) { |
255 |
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hdrs[i] = 0; |
256 |
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257 |
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if (*hdrs) { |
258 |
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if (options & OPTION_HEADERS) |
259 |
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info("%s\n", hdrs); |
260 |
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log_info(LOG_WRITE, hdrs); |
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} else { |
262 |
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log_info(LOG_WRITE, NULL); |
263 |
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} |
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} else { |
265 |
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break; |
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} |
267 |
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} |
268 |
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} while (!strcasestr(buf, ultostr(tag, 16))); |
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lefcha |
1.6 |
|
270 |
lefcha |
1.14 |
return analyze_response(buf); |
271 |
lefcha |
1.1 |
} |
272 |
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273 |
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/* |
275 |
lefcha |
1.3 |
* Process the data that server sent due to IMAP COPY client request. |
276 |
lefcha |
1.1 |
*/ |
277 |
lefcha |
1.9 |
int copy_response(unsigned int tag) |
278 |
lefcha |
1.1 |
{ |
279 |
lefcha |
1.14 |
char buf[RESPONSE_BUF]; |
280 |
lefcha |
1.1 |
|
281 |
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do |
282 |
lefcha |
1.14 |
receive_response(buf); |
283 |
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while (!strcasestr(buf, ultostr(tag, 16))); |
284 |
lefcha |
1.1 |
|
285 |
lefcha |
1.14 |
if (analyze_response(buf) == RESPONSE_NO && strcasestr(buf, "[TRYCREATE]")) |
286 |
lefcha |
1.9 |
return RESPONSE_TRYCREATE; |
287 |
lefcha |
1.1 |
|
288 |
lefcha |
1.9 |
return RESPONSE_OK; |
289 |
lefcha |
1.1 |
} |
290 |
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291 |
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292 |
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/* |
293 |
lefcha |
1.3 |
* Check if response of server to client's request was succesfully |
294 |
lefcha |
1.1 |
* delivered or there was some kind of error. |
295 |
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*/ |
296 |
lefcha |
1.14 |
int analyze_response(char *buf) |
297 |
lefcha |
1.1 |
{ |
298 |
lefcha |
1.9 |
int r = RESPONSE_OK; |
299 |
lefcha |
1.1 |
regex_t creg; |
300 |
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regmatch_t match[3]; |
301 |
lefcha |
1.9 |
const char *reg = "[[:xdigit:]]{6,6} ((OK|NO|BAD)[[:print:]]*)\r\n"; |
302 |
lefcha |
1.14 |
char result[RESULT_BUF]; |
303 |
lefcha |
1.1 |
|
304 |
lefcha |
1.4 |
result[0] = 0; |
305 |
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|
306 |
lefcha |
1.9 |
regcomp(&creg, reg, REG_EXTENDED | REG_ICASE); |
307 |
lefcha |
1.6 |
|
308 |
lefcha |
1.14 |
if (!regexec(&creg, buf, 3, match, 0)) { |
309 |
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strncat(result, buf + match[1].rm_so, |
310 |
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min(match[1].rm_eo - match[1].rm_so, RESULT_BUF - 1)); |
311 |
lefcha |
1.1 |
|
312 |
lefcha |
1.14 |
if (!strncasecmp(buf + match[2].rm_so, "NO", 2)) |
313 |
lefcha |
1.9 |
r = RESPONSE_NO; |
314 |
lefcha |
1.14 |
else if (!strncasecmp(buf + match[2].rm_so, "BAD", 3)) |
315 |
lefcha |
1.9 |
r = RESPONSE_BAD; |
316 |
lefcha |
1.6 |
|
317 |
lefcha |
1.1 |
verbose("Server response: %s\n", result); |
318 |
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} |
319 |
lefcha |
1.6 |
regfree(&creg); |
320 |
lefcha |
1.1 |
|
321 |
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return r; |
322 |
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} |