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Mail: handling of CAPABILITY in the LOGIN IMAP command.

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SmarterMail IMAP server may send an optional untagged CAPABILITY response.
Previously resulted in a broken connection, now it is discarded.
This commit is contained in:
Sergey Kandaurov 2024-10-24 00:52:21 +04:00
parent f45c2707ea
commit 2bb2f53ff4
1 changed files with 27 additions and 0 deletions
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27
src/mail/ngx_mail_proxy_module.c
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@ -1019,12 +1019,39 @@ ngx_mail_proxy_read_response(ngx_mail_session_t *s, ngx_uint_t state)
break;
case ngx_imap_passwd:
if (ngx_strncmp(p, s->tag.data, s->tag.len) != 0) {
/* as per RFC 3501, 6.2.3 LOGIN Command */
if (b->last - b->pos < 12) {
return NGX_AGAIN;
}
if (ngx_strncmp(p, "* CAPABILITY", 12) == 0) {
p += 12;
while (p < b->last - 1) {
if (p[0] == CR && p[1] == LF) {
p += (sizeof(CRLF) - 1);
break;
}
p++;
}
if (b->last - p < 4) {
return NGX_AGAIN;
}
}
}
if (ngx_strncmp(p, s->tag.data, s->tag.len) == 0) {
p += s->tag.len;
if (p[0] == 'O' && p[1] == 'K') {
return NGX_OK;
}
}
break;
}