accel-ppp.git, branch sstp-ppposeq

sstp: add ppposeq transport to avoid userspace HDLC framing

2026-08-02T20:06:01+00:00

A pty is a byte stream, so the tty flip buffer merges frames written back to back and sstp has to re-delimit them with async HDLC escaping and a CRC-16 FCS. On a 1452-byte payload that is ~3600 ns per frame, most of it spent on the FCS. PPPOSEQ is a pppox protocol whose socket is the ppp endpoint itself, so one datagram is one frame and no framing is needed at all. The same payload takes ~380 ns per frame, about 9 times less. Requires kernel 2.6.37, the first with PX_MAX_PROTO 3, whose remaining slot it claims. Supported kernels are from 2.6.37 to 7.2. The new ppp-mode option selects the transport; auto, the default, falls back to async when the module is unavailable, so hosts with prebuilt kernels are unaffected. PPP_SYNC is removed, being disabled and unfixable over a pty: frame boundaries cannot be recovered from the stream, and coalescing cannot be prevented since frames arrive from the network stack.

Merge pull request #341 from accel-ppp/sstp-flush-on-disconnect

2026-08-02T15:27:45+00:00

Drain out_queue to the stream in sstp_disconnect before closing, so a queued response is sent before the connection is torn down. Best-effort, non-blocking, via a sstp_flush() helper that mirrors sstp_write. Also fix http client warnings (curl): < HTTP/1.1 404 Not Found < Date: Sun, 02 Aug 2026 14:05:21 GMT * no chunk, no close, no size. Assume close to signal end

sstp: enforce standard http replies w/o body

2026-08-02T15:08:11+00:00

fixes http client warnings (curl): < HTTP/1.1 404 Not Found < Date: Sun, 02 Aug 2026 14:05:21 GMT * no chunk, no close, no size. Assume close to signal end

sstp: flush queued output on disconnect

2026-08-02T14:36:00+00:00

Revert "Fixes the issue #124 HTTP replay for non SSTP query"

2026-08-02T14:36:00+00:00

Reverts 635ab1b7, e7a03684, 382b02b6, 4fbba471 on accel-pppd/ctrl/sstp/sstp.c: - http_send_response: sstp_send(buf) || sstp_write(&hnd) -> sstp_send(buf) - http_handler: drop the r/return 1 path - sstp_read: drop else if (n > 0) return 1 - remove the sstp_write forward decl

Merge pull request #340 from accel-ppp/sstp-alloc-invariant

2026-08-02T13:58:25+00:00

sstp: express escape buffer bound as one invariant

2026-07-26T08:19:24+00:00

(size + PPP_FCSLEN) * 2 + 2 equals 8b781b94's size*2 + 2 + PPP_FCSLEN*2 but can't collapse back to the 1801847a under-allocating form.

Merge pull request #335 from nuclearcat/docs/readme-markdown

2026-07-19T21:11:36+00:00

Docs/readme markdown, configs updates, man updates

Merge pull request #328 from nuclearcat/radius-leak-fixes

2026-07-18T21:56:35+00:00

Radius leak fixes

Merge pull request #331 from nuclearcat/ipoe-leak-fixes

2026-07-18T21:56:18+00:00

ipoe: fix two memory leaks (relay reply packet, username string)