diff options
Diffstat (limited to 'imap.c')
| -rw-r--r-- | imap.c | 146 |
1 files changed, 77 insertions, 69 deletions
@@ -65,82 +65,90 @@ static int imap_ok(int sock, char *argbuf) if (islower((unsigned char)*cp)) *cp = toupper((unsigned char)*cp); - /* interpret untagged status responses */ - if (strstr(buf, "* CAPABILITY")) - { - strlcpy(capabilities, buf + 12, sizeof(capabilities)); - } - else if (strstr(buf, "EXISTS")) - { - count = atoi(buf+2); - /* - * Don't trust the message count passed by the server. - * Without this check, it might be possible to do a - * DNS-spoofing attack that would pass back a ridiculous - * count, and allocate a malloc area that would overlap - * a portion of the stack. - */ - if (count > INT_MAX/sizeof(int)) - { - report(stderr, GT_("bogus message count!")); - return(PS_PROTOCOL); + /* interpret untagged status responses + * First check if we really have an untagged response, starting + * with "*" SPACE. Then, for each individual check, use a BLANK + * before the word to avoid confusion with the \Recent flag or + * similar */ + if (buf[0] == '*' && buf[1] == ' ') { + if (strstr(buf, " CAPABILITY")) { + strlcpy(capabilities, buf + 12, sizeof(capabilities)); } - - /* - * Nasty kluge to handle RFC2177 IDLE. If we know we're idling - * we can't wait for the tag matching the IDLE; we have to tell the - * server the IDLE is finished by shipping back a DONE when we - * see an EXISTS. Only after that will a tagged response be - * shipped. The idling flag also gets cleared on a timeout. - */ - if (stage == STAGE_IDLE) + else if (strstr(buf, " EXISTS")) { - /* If IDLE isn't supported, we were only sending NOOPs anyway. */ - if (has_idle) + count = atoi(buf+2); + /* + * Don't trust the message count passed by the server. + * Without this check, it might be possible to do a + * DNS-spoofing attack that would pass back a ridiculous + * count, and allocate a malloc area that would overlap + * a portion of the stack. + */ + if (count > INT_MAX/sizeof(int)) { - /* we do our own write and report here to disable tagging */ - SockWrite(sock, "DONE\r\n", 6); - if (outlevel >= O_MONITOR) - report(stdout, "IMAP> DONE\n"); + report(stderr, GT_("bogus message count!")); + return(PS_PROTOCOL); } - mytimeout = saved_timeout; - stage = STAGE_FETCH; + /* + * Nasty kluge to handle RFC2177 IDLE. If we know we're idling + * we can't wait for the tag matching the IDLE; we have to tell the + * server the IDLE is finished by shipping back a DONE when we + * see an EXISTS. Only after that will a tagged response be + * shipped. The idling flag also gets cleared on a timeout. + */ + if (stage == STAGE_IDLE) + { + /* If IDLE isn't supported, we were only sending NOOPs anyway. */ + if (has_idle) + { + /* we do our own write and report here to disable tagging */ + SockWrite(sock, "DONE\r\n", 6); + if (outlevel >= O_MONITOR) + report(stdout, "IMAP> DONE\n"); + } + + mytimeout = saved_timeout; + stage = STAGE_FETCH; + } + } + else if (strstr(buf, " RECENT")) + { + recentcount_ok = 1; + recentcount = atoi(buf+2); + } + else if (strstr(buf, " EXPUNGE")) + { + /* the response "* 10 EXPUNGE" means that the currently + * tenth (i.e. only one) message has been deleted */ + if (atoi(buf+2) > 0) + count--; + if (count < 0) + count = 0; + } + else if (strstr(buf, " PREAUTH")) + { + preauth = TRUE; + } + /* + * The server may decide to make the mailbox read-only, + * which causes fetchmail to go into a endless loop + * fetching the same message over and over again. + * + * However, for check_only, we use EXAMINE which will + * mark the mailbox read-only as per the RFC. + * + * This checks for the condition and aborts if + * the mailbox is read-only. + * + * See RFC 2060 section 6.3.1 (SELECT). + * See RFC 2060 section 6.3.2 (EXAMINE). + */ + else if (!check_only && strstr(buf, "[READ-ONLY]")) + { + return(PS_LOCKBUSY); } } - /* a space is required to avoid confusion with the \Recent flag */ - else if (strstr(buf, " RECENT")) - { - recentcount_ok = 1; - recentcount = atoi(buf+2); - } - else if (strstr(buf, "EXPUNGE") && !strstr(buf, "OK")) - { - /* the response "* 10 EXPUNGE" means that the currently - * tenth (i.e. only one) message has been deleted */ - if (atoi(buf+2) > 0) - count--; - if (count < 0) - count = 0; - } - else if (strstr(buf, "PREAUTH")) - preauth = TRUE; - /* - * The server may decide to make the mailbox read-only, - * which causes fetchmail to go into a endless loop - * fetching the same message over and over again. - * - * However, for check_only, we use EXAMINE which will - * mark the mailbox read-only as per the RFC. - * - * This checks for the condition and aborts if - * the mailbox is read-only. - * - * See RFC 2060 section 6.3.1 (SELECT). - * See RFC 2060 section 6.3.2 (EXAMINE). - */ - else if (!check_only && strstr(buf, "[READ-ONLY]")) - return(PS_LOCKBUSY); } while (tag[0] != '\0' && strncmp(buf, tag, strlen(tag))); |