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#include <stdio.h> |
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#include <unistd.h> |
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#include <stdlib.h> |
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#include <ctype.h> |
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#include <errno.h> |
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#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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|
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#include "config.h" |
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#include "imapfilter.h" |
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|
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|
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extern unsigned int options; |
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|
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|
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/* |
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* Read data the server sent. |
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*/ |
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int receive_response(char *buf) |
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{ |
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socket_read(buf); |
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|
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#ifdef DEBUG |
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printf("\n%s\n", buf); |
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#endif |
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|
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return analyze_response(buf); |
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} |
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|
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|
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/* |
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* Get server response to client's request. |
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*/ |
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int server_response(unsigned int tag) |
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{ |
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int r; |
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char buf[RESPONSE_BUF]; |
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|
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do |
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r = receive_response(buf); |
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while (tag && !strcasestr(buf, ultostr(tag, 16))); |
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|
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return r; |
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} |
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|
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|
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/* |
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* 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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char buf[RESPONSE_BUF]; |
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|
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receive_response(buf); |
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|
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if (strcasestr(buf, "BYE")) |
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return RESPONSE_BYE; |
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|
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return RESPONSE_OK; |
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} |
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|
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/* |
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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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int r; |
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char buf[RESPONSE_BUF]; |
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|
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do |
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r = receive_response(buf); |
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while (!strcasestr(buf, ultostr(tag, 16))); |
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|
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if (!strcasestr(buf, "IMAP4rev1")) { |
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error("imapfilter: server does not support IMAP4rev1 protocol\n"); |
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return -2; |
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} |
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return r; |
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} |
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|
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|
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/* |
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* Process the data that server sent due to IMAP STATUS client request. |
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*/ |
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int status_response(unsigned int tag) |
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{ |
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int r; |
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char buf[RESPONSE_BUF]; |
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unsigned int exist, recent, unseen; |
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char *c; |
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|
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exist = recent = unseen = 0; |
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|
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do |
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r = receive_response(buf); |
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while (!strcasestr(buf, ultostr(tag, 16))); |
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|
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if ((c = strcasestr(buf, "MESSAGES"))) { |
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c += 9; |
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exist = strtoul(c, NULL, 10); |
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} |
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if ((c = strcasestr(buf, "RECENT"))) { |
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c += 7; |
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recent = strtoul(c, NULL, 10); |
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} |
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if ((c = strcasestr(buf, "UNSEEN"))) { |
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c += 7; |
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unseen = strtoul(c, NULL, 10); |
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} |
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if (!exist) { |
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info("No messages "); |
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return -2; |
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} |
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info("%d message%s, %d recent, %d unseen, ", exist, plural(exist), |
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recent, unseen); |
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|
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return r; |
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} |
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|
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|
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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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int r; |
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char buf[RESPONSE_BUF]; |
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|
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do |
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r = receive_response(buf); |
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while (!strcasestr(buf, ultostr(tag, 16))); |
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|
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if (strcasestr(buf, "[READ-ONLY]")) |
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return RESPONSE_READONLY; |
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|
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return r; |
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} |
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|
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|
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/* |
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* Process the data that server sent due to IMAP SEARCH client request. |
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*/ |
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int search_response(unsigned int tag, char *mesgs) |
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{ |
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int r; |
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char buf[RESPONSE_BUF]; |
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char *c, *m = mesgs; |
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|
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do |
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r = receive_response(buf); |
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while (!strcasestr(buf, ultostr(tag, 16))); |
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|
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if ((c = strcasestr(buf, "SEARCH "))) { |
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c += 7; |
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while (m - mesgs < SEARCH_MESSAGES_BUF && (isdigit(*c) || *c == ' ')) |
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*(m++) = *(c++); |
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*m = 0; |
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} |
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return r; |
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} |
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|
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|
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/* |
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* Process the data that server sent due to IMAP FETCH client request. |
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*/ |
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int fetch_response(unsigned int tag) |
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{ |
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int r, s, i; |
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char buf[RESPONSE_BUF]; |
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char *pos; |
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char headers[HEADERS_BUF]; |
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|
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headers[0] = 0; |
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|
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do |
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r = receive_response(buf); |
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while (!strcasestr(buf, ultostr(tag, 16))); |
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|
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pos = buf; |
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|
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while ((pos = strchr(pos, '{'))) { |
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s = atoi(pos + 1); |
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pos = strchr(pos, '}'); |
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|
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for (i = 0; i < HEADERS_BUF - 1 && i < s - 2; i++) |
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headers[i] = *(pos + 3 + i); |
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|
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headers[i] = 0; |
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pos += i; |
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|
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if (*headers) { |
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if (options & OPTION_HEADERS) |
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info("%s\n", headers); |
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log_info(LOG_WRITE, headers); |
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} else |
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log_info(LOG_WRITE, NULL); |
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} |
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|
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return r; |
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} |
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|
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|
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/* |
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* Process the data that server sent due to IMAP COPY client request. |
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*/ |
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int copy_response(unsigned int tag) |
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{ |
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int r; |
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char buf[RESPONSE_BUF]; |
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|
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do |
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r = receive_response(buf); |
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while (!strcasestr(buf, ultostr(tag, 16))); |
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|
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if (r == RESPONSE_NO && strcasestr(buf, "[TRYCREATE]")) |
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return RESPONSE_TRYCREATE; |
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|
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return RESPONSE_OK; |
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} |
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|
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|
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/* |
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* Check if response of server to client's request was succesfully |
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* delivered or there was some kind of error. |
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*/ |
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int analyze_response(char *buf) |
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{ |
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int r = RESPONSE_OK; |
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regex_t creg; |
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regmatch_t match[3]; |
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const char *reg = "[[:xdigit:]]{6,6} ((OK|NO|BAD)[[:print:]]*)\r\n"; |
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char result[RESULT_BUF]; |
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|
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result[0] = 0; |
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|
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regcomp(&creg, reg, REG_EXTENDED | REG_ICASE); |
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|
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if (!regexec(&creg, buf, 3, match, 0)) { |
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strncat(result, buf + match[1].rm_so, |
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min(match[1].rm_eo - match[1].rm_so, RESULT_BUF - 1)); |
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|
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if (!strncasecmp(buf + match[2].rm_so, "NO", 2)) |
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r = RESPONSE_NO; |
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else if (!strncasecmp(buf + match[2].rm_so, "BAD", 3)) |
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r = RESPONSE_BAD; |
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|
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verbose("Server response: %s\n", result); |
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} |
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regfree(&creg); |
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|
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return r; |
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} |
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