Brad Arant
cd5e0a9905
IMAP (RFC 3501): LOGIN through UID, previously all stubs except CAPABILITY/LOGOUT/a partial APPEND. Multi-folder support with per-folder UID/flag indexing (new MailFolder class, backed by .uidvalidity/.uidnext/ .imapindex sidecar files), ENVELOPE support (new MessageHeaders class: header parsing, address-list parsing, IMAP quoting), and shared cursor-based argument parsing (new IMAPArgs class: sequence sets, flag lists, dates, folder-name normalization, and path-traversal protection via isValidFolderName - a bare ".." folder name would otherwise resolve into a sibling user's mailbox directory). POP3 (RFC 1939): USER through QUIT, previously only CAPA. Added UIDL. POP3 handlers use cursor-based parsing throughout rather than indexed access - ZString's copy constructor doesn't copy its `list` field, and POP3's dispatch passes the request by value, so indexed access into a copy was silently reading nothing. SMTP: DMARC evaluation added to the DATA-terminator path (DKIM verification + alignment/policy, Authentication-Results header, conditional rejection matching RFC 7489 6.3's p=reject + sampled pct=). AUTH LOGIN now handles RFC 4954's optional inline initial response (e.g. Python smtplib's "AUTH LOGIN <base64>" in one line) instead of only the exact three-line form. Outbound relay now forces IPv4 (AF_INET) instead of AF_UNSPEC - this server's IPv4 has a correct PTR record and SPF coverage, its IPv6 doesn't, and Gmail was rejecting outbound mail with 550 5.7.25 as a result. Delivery pipeline: local delivery now runs the message through SpamAssassin (new SpamAssassinFilter class, speaking spamd's PROCESS protocol directly over a raw socket - fails open/delivers unscanned if spamd is unreachable) instead of a plain hardlink, since scanning can tag/modify content. BARANTMailConfig: extracted config loading into its own class. compile: (see individual file changes - build script adjustments to match the above). Deliberately excluded from this commit: barantmail.log/ barantmail-service.log (operational logs, not source - barantmail.log in particular was the runaway 55GB/12.9GB file from a busy-loop bug fixed separately in ServerCore) and barantmail.cfg (this server's own live deployment config, matching how APIServer's equivalent config also stays untracked).
55 lines
2.2 KiB
C++
55 lines
2.2 KiB
C++
#ifndef __MessageHeaders_h__
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# define __MessageHeaders_h__
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#include <string>
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#include <vector>
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namespace mail {
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///
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/// Text-only header parsing shared by FETCH's ENVELOPE/BODY[HEADER...]
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/// data items and SEARCH's FROM/TO/CC/SUBJECT criteria. Deliberately
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/// does NOT parse MIME structure (no multipart, no Content-Type
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/// tree) - see MailFolder.h's own doc comment on the same scoping
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/// decision (BODYSTRUCTURE is out of scope; ENVELOPE only needs
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/// header text).
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///
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struct Address {
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std::string name;
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std::string mailbox;
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std::string host;
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};
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// Splits a raw message into its header block and body, at the first
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// blank line. header does NOT include the trailing blank line.
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void splitMessage(const std::string &message, std::string &headerBlock, std::string &bodyBlock);
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// Unfolds continuation lines (RFC 5322 3.2.2 - a line starting with
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// SP/TAB continues the previous header) and returns every header as
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// (name, value) in on-the-wire order. Value has the folding
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// whitespace collapsed to a single space and is otherwise verbatim.
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std::vector<std::pair<std::string, std::string>> parseHeaderLines(const std::string &headerBlock);
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// First header matching name (case-insensitive), or "" if absent.
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std::string getHeader(const std::vector<std::pair<std::string, std::string>> &headers, const std::string &name);
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// "Name <user@host>, user2@host2" -> parsed addresses. Splits on
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// top-level commas only (respecting "..." and <...>) - a simplified,
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// not fully RFC 5322-compliant parser (no comments, no obsolete
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// routing syntax), sufficient for real-world From/To/Cc header text.
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std::vector<Address> parseAddressList(const std::string &headerValue);
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// RFC 3501 7.4.2 ENVELOPE structure, built entirely from parsed
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// headers - "sender"/"reply-to" default to "from" when their own
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// header is absent, per the same RFC section's own convention.
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std::string buildEnvelope(const std::string &message);
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// nstring per RFC 3501 4.3 - a quoted string with backslash/quote
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// escaped, or the literal NIL for an empty value.
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std::string imapQuoteOrNil(const std::string &value);
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}
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#endif
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