lsquic_qdec_hdl.c revision a5fa05f9
17d09751dSDmitri Tikhonov/* Copyright (c) 2017 - 2020 LiteSpeed Technologies Inc. See LICENSE. */ 25392f7a3SLiteSpeed Tech/* 35392f7a3SLiteSpeed Tech * lsquic_qdec_hdl.c -- QPACK decoder streams handler 45392f7a3SLiteSpeed Tech */ 55392f7a3SLiteSpeed Tech 65392f7a3SLiteSpeed Tech#include <assert.h> 75392f7a3SLiteSpeed Tech#include <errno.h> 85392f7a3SLiteSpeed Tech#include <inttypes.h> 95392f7a3SLiteSpeed Tech#include <stdlib.h> 105392f7a3SLiteSpeed Tech#include <string.h> 115392f7a3SLiteSpeed Tech#include <sys/queue.h> 125392f7a3SLiteSpeed Tech 135392f7a3SLiteSpeed Tech#include "lsquic.h" 145392f7a3SLiteSpeed Tech#include "lsquic_types.h" 15a5fa05f9SDmitri Tikhonov#include "lsxpack_header.h" 165392f7a3SLiteSpeed Tech#include "lsquic_int_types.h" 175392f7a3SLiteSpeed Tech#include "lsquic_sfcw.h" 185392f7a3SLiteSpeed Tech#include "lsquic_varint.h" 195392f7a3SLiteSpeed Tech#include "lsquic_hq.h" 205392f7a3SLiteSpeed Tech#include "lsquic_hash.h" 215392f7a3SLiteSpeed Tech#include "lsquic_stream.h" 225392f7a3SLiteSpeed Tech#include "lsquic_frab_list.h" 235392f7a3SLiteSpeed Tech#include "lsqpack.h" 245392f7a3SLiteSpeed Tech#include "lsquic_http1x_if.h" 255392f7a3SLiteSpeed Tech#include "lsquic_qdec_hdl.h" 265392f7a3SLiteSpeed Tech#include "lsquic_mm.h" 275392f7a3SLiteSpeed Tech#include "lsquic_engine_public.h" 285392f7a3SLiteSpeed Tech#include "lsquic_headers.h" 295392f7a3SLiteSpeed Tech#include "lsquic_conn.h" 305392f7a3SLiteSpeed Tech 315392f7a3SLiteSpeed Tech#define LSQUIC_LOGGER_MODULE LSQLM_QDEC_HDL 325392f7a3SLiteSpeed Tech#define LSQUIC_LOG_CONN_ID lsquic_conn_log_cid(qdh->qdh_conn) 335392f7a3SLiteSpeed Tech#include "lsquic_logger.h" 345392f7a3SLiteSpeed Tech 355392f7a3SLiteSpeed Techstatic void 365392f7a3SLiteSpeed Techqdh_hblock_unblocked (void *); 375392f7a3SLiteSpeed Tech 385392f7a3SLiteSpeed Tech 395392f7a3SLiteSpeed Techstatic int 405392f7a3SLiteSpeed Techqdh_write_decoder (struct qpack_dec_hdl *qdh, const unsigned char *buf, 415392f7a3SLiteSpeed Tech size_t sz) 425392f7a3SLiteSpeed Tech{ 435392f7a3SLiteSpeed Tech ssize_t nw; 445392f7a3SLiteSpeed Tech 455392f7a3SLiteSpeed Tech if (!(qdh->qdh_dec_sm_out && lsquic_frab_list_empty(&qdh->qdh_fral))) 465392f7a3SLiteSpeed Tech { 475392f7a3SLiteSpeed Tech write_to_frab: 485392f7a3SLiteSpeed Tech if (0 == lsquic_frab_list_write(&qdh->qdh_fral, 495392f7a3SLiteSpeed Tech (unsigned char *) buf, sz)) 505392f7a3SLiteSpeed Tech { 515392f7a3SLiteSpeed Tech LSQ_DEBUG("wrote %zu bytes to frab list", sz); 525392f7a3SLiteSpeed Tech lsquic_stream_wantwrite(qdh->qdh_dec_sm_out, 1); 535392f7a3SLiteSpeed Tech return 0; 545392f7a3SLiteSpeed Tech } 555392f7a3SLiteSpeed Tech else 565392f7a3SLiteSpeed Tech { 575392f7a3SLiteSpeed Tech LSQ_INFO("error writing to frab list"); 585392f7a3SLiteSpeed Tech return -1; 595392f7a3SLiteSpeed Tech } 605392f7a3SLiteSpeed Tech } 615392f7a3SLiteSpeed Tech 625392f7a3SLiteSpeed Tech nw = lsquic_stream_write(qdh->qdh_dec_sm_out, buf, sz); 635392f7a3SLiteSpeed Tech if (nw < 0) 645392f7a3SLiteSpeed Tech { 655392f7a3SLiteSpeed Tech LSQ_INFO("error writing to outgoing QPACK decoder stream: %s", 665392f7a3SLiteSpeed Tech strerror(errno)); 675392f7a3SLiteSpeed Tech return -1; 685392f7a3SLiteSpeed Tech } 695392f7a3SLiteSpeed Tech LSQ_DEBUG("wrote %zd bytes to outgoing QPACK decoder stream", nw); 705392f7a3SLiteSpeed Tech 715392f7a3SLiteSpeed Tech if ((size_t) nw == sz) 725392f7a3SLiteSpeed Tech return 0; 735392f7a3SLiteSpeed Tech 745392f7a3SLiteSpeed Tech buf = buf + nw; 755392f7a3SLiteSpeed Tech sz -= (size_t) nw; 765392f7a3SLiteSpeed Tech goto write_to_frab; 775392f7a3SLiteSpeed Tech} 785392f7a3SLiteSpeed Tech 795392f7a3SLiteSpeed Tech 805392f7a3SLiteSpeed Techstatic int 815392f7a3SLiteSpeed Techqdh_write_type (struct qpack_dec_hdl *qdh) 825392f7a3SLiteSpeed Tech{ 835392f7a3SLiteSpeed Tech int s; 845392f7a3SLiteSpeed Tech 855392f7a3SLiteSpeed Tech#ifndef NDEBUG 865392f7a3SLiteSpeed Tech const char *env = getenv("LSQUIC_RND_VARINT_LEN"); 875392f7a3SLiteSpeed Tech if (env && atoi(env)) 885392f7a3SLiteSpeed Tech { 895392f7a3SLiteSpeed Tech s = rand() & 3; 905392f7a3SLiteSpeed Tech LSQ_DEBUG("writing %d-byte stream type", 1 << s); 915392f7a3SLiteSpeed Tech } 925392f7a3SLiteSpeed Tech else 935392f7a3SLiteSpeed Tech#endif 945392f7a3SLiteSpeed Tech s = 0; 955392f7a3SLiteSpeed Tech 965392f7a3SLiteSpeed Tech switch (s) 975392f7a3SLiteSpeed Tech { 985392f7a3SLiteSpeed Tech case 0: 995392f7a3SLiteSpeed Tech return qdh_write_decoder(qdh, 1005392f7a3SLiteSpeed Tech (unsigned char []) { HQUST_QPACK_DEC }, 1); 1015392f7a3SLiteSpeed Tech case 1: 1025392f7a3SLiteSpeed Tech return qdh_write_decoder(qdh, 1035392f7a3SLiteSpeed Tech (unsigned char []) { 0x40, HQUST_QPACK_DEC }, 2); 1045392f7a3SLiteSpeed Tech case 2: 1055392f7a3SLiteSpeed Tech return qdh_write_decoder(qdh, 1065392f7a3SLiteSpeed Tech (unsigned char []) { 0x80, 0x00, 0x00, HQUST_QPACK_DEC }, 4); 1075392f7a3SLiteSpeed Tech default: 1085392f7a3SLiteSpeed Tech return qdh_write_decoder(qdh, 1095392f7a3SLiteSpeed Tech (unsigned char []) { 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 1105392f7a3SLiteSpeed Tech HQUST_QPACK_DEC }, 8); 1115392f7a3SLiteSpeed Tech } 1125392f7a3SLiteSpeed Tech} 1135392f7a3SLiteSpeed Tech 1145392f7a3SLiteSpeed Tech 1155392f7a3SLiteSpeed Techstatic void 1165392f7a3SLiteSpeed Techqdh_begin_out (struct qpack_dec_hdl *qdh) 1175392f7a3SLiteSpeed Tech{ 1185392f7a3SLiteSpeed Tech if (0 != qdh_write_type(qdh)) 1195392f7a3SLiteSpeed Tech { 1205392f7a3SLiteSpeed Tech LSQ_WARN("%s: could not write to decoder", __func__); 1215392f7a3SLiteSpeed Tech qdh->qdh_conn->cn_if->ci_internal_error(qdh->qdh_conn, 1225392f7a3SLiteSpeed Tech "cannot write to decoder stream"); 1235392f7a3SLiteSpeed Tech } 1245392f7a3SLiteSpeed Tech} 1255392f7a3SLiteSpeed Tech 1265392f7a3SLiteSpeed Tech 1275392f7a3SLiteSpeed Techint 1285392f7a3SLiteSpeed Techlsquic_qdh_init (struct qpack_dec_hdl *qdh, struct lsquic_conn *conn, 1295392f7a3SLiteSpeed Tech int is_server, const struct lsquic_engine_public *enpub, 1305392f7a3SLiteSpeed Tech unsigned dyn_table_size, unsigned max_risked_streams) 1315392f7a3SLiteSpeed Tech{ 1325392f7a3SLiteSpeed Tech qdh->qdh_conn = conn; 1335392f7a3SLiteSpeed Tech lsquic_frab_list_init(&qdh->qdh_fral, 0x400, NULL, NULL, NULL); 1345392f7a3SLiteSpeed Tech lsqpack_dec_init(&qdh->qdh_decoder, (void *) conn, dyn_table_size, 1355392f7a3SLiteSpeed Tech max_risked_streams, qdh_hblock_unblocked); 1365392f7a3SLiteSpeed Tech qdh->qdh_flags |= QDH_INITIALIZED; 1375392f7a3SLiteSpeed Tech qdh->qdh_enpub = enpub; 1385392f7a3SLiteSpeed Tech if (qdh->qdh_enpub->enp_hsi_if == lsquic_http1x_if) 1395392f7a3SLiteSpeed Tech { 1405392f7a3SLiteSpeed Tech qdh->qdh_h1x_ctor_ctx = (struct http1x_ctor_ctx) { 1415392f7a3SLiteSpeed Tech .conn = conn, 142a4f5dac3SDmitri Tikhonov .max_headers_sz = MAX_HTTP1X_HEADERS_SIZE, 1435392f7a3SLiteSpeed Tech .is_server = is_server, 1445392f7a3SLiteSpeed Tech }; 1455392f7a3SLiteSpeed Tech qdh->qdh_hsi_ctx = &qdh->qdh_h1x_ctor_ctx; 1465392f7a3SLiteSpeed Tech } 1475392f7a3SLiteSpeed Tech else 1485392f7a3SLiteSpeed Tech qdh->qdh_hsi_ctx = qdh->qdh_enpub->enp_hsi_ctx; 1495392f7a3SLiteSpeed Tech if (qdh->qdh_dec_sm_out) 1505392f7a3SLiteSpeed Tech qdh_begin_out(qdh); 1515392f7a3SLiteSpeed Tech if (qdh->qdh_enc_sm_in) 1525392f7a3SLiteSpeed Tech lsquic_stream_wantread(qdh->qdh_enc_sm_in, 1); 1535392f7a3SLiteSpeed Tech LSQ_DEBUG("initialized"); 1545392f7a3SLiteSpeed Tech return 0; 1555392f7a3SLiteSpeed Tech} 1565392f7a3SLiteSpeed Tech 1575392f7a3SLiteSpeed Tech 1585392f7a3SLiteSpeed Techvoid 1595392f7a3SLiteSpeed Techlsquic_qdh_cleanup (struct qpack_dec_hdl *qdh) 1605392f7a3SLiteSpeed Tech{ 1615392f7a3SLiteSpeed Tech if (qdh->qdh_flags & QDH_INITIALIZED) 1625392f7a3SLiteSpeed Tech { 1635392f7a3SLiteSpeed Tech LSQ_DEBUG("cleanup"); 1645392f7a3SLiteSpeed Tech lsqpack_dec_cleanup(&qdh->qdh_decoder); 1655392f7a3SLiteSpeed Tech lsquic_frab_list_cleanup(&qdh->qdh_fral); 1665392f7a3SLiteSpeed Tech qdh->qdh_flags &= ~QDH_INITIALIZED; 1675392f7a3SLiteSpeed Tech } 1685392f7a3SLiteSpeed Tech} 1695392f7a3SLiteSpeed Tech 1705392f7a3SLiteSpeed Techstatic lsquic_stream_ctx_t * 1715392f7a3SLiteSpeed Techqdh_out_on_new (void *stream_if_ctx, struct lsquic_stream *stream) 1725392f7a3SLiteSpeed Tech{ 1735392f7a3SLiteSpeed Tech struct qpack_dec_hdl *const qdh = stream_if_ctx; 1745392f7a3SLiteSpeed Tech qdh->qdh_dec_sm_out = stream; 1755392f7a3SLiteSpeed Tech if (qdh->qdh_flags & QDH_INITIALIZED) 1765392f7a3SLiteSpeed Tech qdh_begin_out(qdh); 1775392f7a3SLiteSpeed Tech LSQ_DEBUG("initialized outgoing decoder stream"); 1785392f7a3SLiteSpeed Tech return (void *) qdh; 1795392f7a3SLiteSpeed Tech} 1805392f7a3SLiteSpeed Tech 1815392f7a3SLiteSpeed Tech 1825392f7a3SLiteSpeed Techstatic void 1835392f7a3SLiteSpeed Techqdh_out_on_write (struct lsquic_stream *stream, lsquic_stream_ctx_t *ctx) 1845392f7a3SLiteSpeed Tech{ 1855392f7a3SLiteSpeed Tech struct qpack_dec_hdl *const qdh = (void *) ctx; 1865392f7a3SLiteSpeed Tech struct lsquic_reader reader; 1875392f7a3SLiteSpeed Tech ssize_t nw; 1885392f7a3SLiteSpeed Tech unsigned char buf[LSQPACK_LONGEST_ICI]; 1895392f7a3SLiteSpeed Tech 1905392f7a3SLiteSpeed Tech if (lsqpack_dec_ici_pending(&qdh->qdh_decoder)) 1915392f7a3SLiteSpeed Tech { 1925392f7a3SLiteSpeed Tech nw = lsqpack_dec_write_ici(&qdh->qdh_decoder, buf, sizeof(buf)); 1935392f7a3SLiteSpeed Tech if (nw > 0) 1945392f7a3SLiteSpeed Tech { 1955392f7a3SLiteSpeed Tech if (0 == qdh_write_decoder(qdh, buf, nw)) 1965392f7a3SLiteSpeed Tech LSQ_DEBUG("wrote %zd-byte TSS instruction", nw); 1975392f7a3SLiteSpeed Tech else 1985392f7a3SLiteSpeed Tech goto err; 1995392f7a3SLiteSpeed Tech } 2005392f7a3SLiteSpeed Tech else if (nw < 0) 2015392f7a3SLiteSpeed Tech { 2025392f7a3SLiteSpeed Tech LSQ_WARN("could not generate TSS instruction"); 2035392f7a3SLiteSpeed Tech goto err; 2045392f7a3SLiteSpeed Tech } 2055392f7a3SLiteSpeed Tech } 2065392f7a3SLiteSpeed Tech 2075392f7a3SLiteSpeed Tech if (lsquic_frab_list_empty(&qdh->qdh_fral)) 2085392f7a3SLiteSpeed Tech { 2095392f7a3SLiteSpeed Tech LSQ_DEBUG("%s: nothing to write", __func__); 2105392f7a3SLiteSpeed Tech lsquic_stream_wantwrite(stream, 0); 2115392f7a3SLiteSpeed Tech return; 2125392f7a3SLiteSpeed Tech } 2135392f7a3SLiteSpeed Tech 2145392f7a3SLiteSpeed Tech reader = (struct lsquic_reader) { 2155392f7a3SLiteSpeed Tech .lsqr_read = lsquic_frab_list_read, 2165392f7a3SLiteSpeed Tech .lsqr_size = lsquic_frab_list_size, 2175392f7a3SLiteSpeed Tech .lsqr_ctx = &qdh->qdh_fral, 2185392f7a3SLiteSpeed Tech }; 2195392f7a3SLiteSpeed Tech 2205392f7a3SLiteSpeed Tech nw = lsquic_stream_writef(stream, &reader); 2215392f7a3SLiteSpeed Tech if (nw >= 0) 2225392f7a3SLiteSpeed Tech { 2235392f7a3SLiteSpeed Tech LSQ_DEBUG("wrote %zd bytes to stream", nw); 2245392f7a3SLiteSpeed Tech (void) lsquic_stream_flush(stream); 2255392f7a3SLiteSpeed Tech if (lsquic_frab_list_empty(&qdh->qdh_fral)) 226747be414SDmitri Tikhonov { 2275392f7a3SLiteSpeed Tech lsquic_stream_wantwrite(stream, 0); 228747be414SDmitri Tikhonov if (qdh->qdh_on_dec_sent_func) 229747be414SDmitri Tikhonov { 230747be414SDmitri Tikhonov LSQ_DEBUG("buffered data written: call callback"); 231747be414SDmitri Tikhonov qdh->qdh_on_dec_sent_func(qdh->qdh_on_dec_sent_ctx); 232747be414SDmitri Tikhonov qdh->qdh_on_dec_sent_func = NULL; 233747be414SDmitri Tikhonov qdh->qdh_on_dec_sent_ctx = NULL; 234747be414SDmitri Tikhonov } 235747be414SDmitri Tikhonov } 2365392f7a3SLiteSpeed Tech } 2375392f7a3SLiteSpeed Tech else 2385392f7a3SLiteSpeed Tech { 2395392f7a3SLiteSpeed Tech LSQ_WARN("cannot write to stream: %s", strerror(errno)); 2405392f7a3SLiteSpeed Tech err: 2415392f7a3SLiteSpeed Tech lsquic_stream_wantwrite(stream, 0); 2425392f7a3SLiteSpeed Tech qdh->qdh_conn->cn_if->ci_internal_error(qdh->qdh_conn, 2435392f7a3SLiteSpeed Tech "cannot write to stream"); 2445392f7a3SLiteSpeed Tech } 2455392f7a3SLiteSpeed Tech} 2465392f7a3SLiteSpeed Tech 2475392f7a3SLiteSpeed Tech 2485392f7a3SLiteSpeed Techstatic void 2495392f7a3SLiteSpeed Techqdh_out_on_close (struct lsquic_stream *stream, lsquic_stream_ctx_t *ctx) 2505392f7a3SLiteSpeed Tech{ 2515392f7a3SLiteSpeed Tech struct qpack_dec_hdl *const qdh = (void *) ctx; 2525392f7a3SLiteSpeed Tech qdh->qdh_dec_sm_out = NULL; 2535392f7a3SLiteSpeed Tech LSQ_DEBUG("closed outgoing decoder stream"); 2545392f7a3SLiteSpeed Tech} 2555392f7a3SLiteSpeed Tech 2565392f7a3SLiteSpeed Tech 2575392f7a3SLiteSpeed Techstatic void 2585392f7a3SLiteSpeed Techqdh_out_on_read (struct lsquic_stream *stream, lsquic_stream_ctx_t *ctx) 2595392f7a3SLiteSpeed Tech{ 2605392f7a3SLiteSpeed Tech assert(0); 2615392f7a3SLiteSpeed Tech} 2625392f7a3SLiteSpeed Tech 2635392f7a3SLiteSpeed Tech 2645392f7a3SLiteSpeed Techstatic const struct lsquic_stream_if qdh_dec_sm_out_if = 2655392f7a3SLiteSpeed Tech{ 2665392f7a3SLiteSpeed Tech .on_new_stream = qdh_out_on_new, 2675392f7a3SLiteSpeed Tech .on_read = qdh_out_on_read, 2685392f7a3SLiteSpeed Tech .on_write = qdh_out_on_write, 2695392f7a3SLiteSpeed Tech .on_close = qdh_out_on_close, 2705392f7a3SLiteSpeed Tech}; 2715392f7a3SLiteSpeed Techconst struct lsquic_stream_if *const lsquic_qdh_dec_sm_out_if = 2725392f7a3SLiteSpeed Tech &qdh_dec_sm_out_if; 2735392f7a3SLiteSpeed Tech 2745392f7a3SLiteSpeed Tech 2755392f7a3SLiteSpeed Techstatic lsquic_stream_ctx_t * 2765392f7a3SLiteSpeed Techqdh_in_on_new (void *stream_if_ctx, struct lsquic_stream *stream) 2775392f7a3SLiteSpeed Tech{ 2785392f7a3SLiteSpeed Tech struct qpack_dec_hdl *const qdh = stream_if_ctx; 2795392f7a3SLiteSpeed Tech qdh->qdh_enc_sm_in = stream; 2805392f7a3SLiteSpeed Tech if (qdh->qdh_flags & QDH_INITIALIZED) 2815392f7a3SLiteSpeed Tech lsquic_stream_wantread(qdh->qdh_enc_sm_in, 1); 2825392f7a3SLiteSpeed Tech LSQ_DEBUG("initialized incoming encoder stream"); 2835392f7a3SLiteSpeed Tech return (void *) qdh; 2845392f7a3SLiteSpeed Tech} 2855392f7a3SLiteSpeed Tech 2865392f7a3SLiteSpeed Tech 2875392f7a3SLiteSpeed Techstatic size_t 2885392f7a3SLiteSpeed Techqdh_read_encoder_stream (void *ctx, const unsigned char *buf, size_t sz, 2895392f7a3SLiteSpeed Tech int fin) 2905392f7a3SLiteSpeed Tech{ 2915392f7a3SLiteSpeed Tech struct qpack_dec_hdl *const qdh = (void *) ctx; 2925392f7a3SLiteSpeed Tech const struct lsqpack_dec_err *qerr; 2935392f7a3SLiteSpeed Tech int s; 2945392f7a3SLiteSpeed Tech 2955392f7a3SLiteSpeed Tech if (fin) 2965392f7a3SLiteSpeed Tech { 2975392f7a3SLiteSpeed Tech LSQ_INFO("encoder stream is closed"); 2985392f7a3SLiteSpeed Tech qdh->qdh_conn->cn_if->ci_abort_error(qdh->qdh_conn, 1, 2995392f7a3SLiteSpeed Tech HEC_CLOSED_CRITICAL_STREAM, "Peer closed QPACK encoder stream"); 3005392f7a3SLiteSpeed Tech goto end; 3015392f7a3SLiteSpeed Tech } 3025392f7a3SLiteSpeed Tech 3035392f7a3SLiteSpeed Tech s = lsqpack_dec_enc_in(&qdh->qdh_decoder, buf, sz); 3045392f7a3SLiteSpeed Tech if (s != 0) 3055392f7a3SLiteSpeed Tech { 306747be414SDmitri Tikhonov LSQ_INFO("error reading encoder stream"); 3075392f7a3SLiteSpeed Tech qerr = lsqpack_dec_get_err_info(&qdh->qdh_decoder); 3085392f7a3SLiteSpeed Tech qdh->qdh_conn->cn_if->ci_abort_error(qdh->qdh_conn, 1, 3095392f7a3SLiteSpeed Tech HEC_QPACK_DECODER_STREAM_ERROR, "Error interpreting QPACK encoder " 3105392f7a3SLiteSpeed Tech "stream; offset %"PRIu64", line %d", qerr->off, qerr->line); 3115392f7a3SLiteSpeed Tech goto end; 3125392f7a3SLiteSpeed Tech } 3135392f7a3SLiteSpeed Tech if (qdh->qdh_dec_sm_out 3145392f7a3SLiteSpeed Tech && lsqpack_dec_ici_pending(&qdh->qdh_decoder)) 3155392f7a3SLiteSpeed Tech lsquic_stream_wantwrite(qdh->qdh_dec_sm_out, 1); 3165392f7a3SLiteSpeed Tech 3175392f7a3SLiteSpeed Tech LSQ_DEBUG("successfully fed %zu bytes to QPACK decoder", sz); 3185392f7a3SLiteSpeed Tech 3195392f7a3SLiteSpeed Tech end: 3205392f7a3SLiteSpeed Tech return sz; 3215392f7a3SLiteSpeed Tech} 3225392f7a3SLiteSpeed Tech 3235392f7a3SLiteSpeed Tech 3245392f7a3SLiteSpeed Techstatic void 3255392f7a3SLiteSpeed Techqdh_in_on_read (struct lsquic_stream *stream, lsquic_stream_ctx_t *ctx) 3265392f7a3SLiteSpeed Tech{ 3275392f7a3SLiteSpeed Tech struct qpack_dec_hdl *const qdh = (void *) ctx; 3285392f7a3SLiteSpeed Tech ssize_t nread; 3295392f7a3SLiteSpeed Tech 3305392f7a3SLiteSpeed Tech nread = lsquic_stream_readf(stream, qdh_read_encoder_stream, qdh); 3315392f7a3SLiteSpeed Tech if (nread <= 0) 3325392f7a3SLiteSpeed Tech { 3335392f7a3SLiteSpeed Tech if (nread < 0) 3345392f7a3SLiteSpeed Tech { 3355392f7a3SLiteSpeed Tech LSQ_WARN("cannot read from encoder stream: %s", strerror(errno)); 3365392f7a3SLiteSpeed Tech qdh->qdh_conn->cn_if->ci_internal_error(qdh->qdh_conn, 3375392f7a3SLiteSpeed Tech "cannot read from encoder stream"); 3385392f7a3SLiteSpeed Tech } 3395392f7a3SLiteSpeed Tech else 3405392f7a3SLiteSpeed Tech { 3415392f7a3SLiteSpeed Tech LSQ_INFO("encoder stream closed by peer: abort connection"); 3425392f7a3SLiteSpeed Tech qdh->qdh_conn->cn_if->ci_abort_error(qdh->qdh_conn, 1, 3435392f7a3SLiteSpeed Tech HEC_CLOSED_CRITICAL_STREAM, "encoder stream closed"); 3445392f7a3SLiteSpeed Tech } 3455392f7a3SLiteSpeed Tech lsquic_stream_wantread(stream, 0); 3465392f7a3SLiteSpeed Tech } 3475392f7a3SLiteSpeed Tech} 3485392f7a3SLiteSpeed Tech 3495392f7a3SLiteSpeed Tech 3505392f7a3SLiteSpeed Techstatic void 3515392f7a3SLiteSpeed Techqdh_in_on_close (struct lsquic_stream *stream, lsquic_stream_ctx_t *ctx) 3525392f7a3SLiteSpeed Tech{ 3535392f7a3SLiteSpeed Tech struct qpack_dec_hdl *const qdh = (void *) ctx; 3545392f7a3SLiteSpeed Tech LSQ_DEBUG("closed incoming encoder stream"); 3555392f7a3SLiteSpeed Tech qdh->qdh_enc_sm_in = NULL; 3565392f7a3SLiteSpeed Tech} 3575392f7a3SLiteSpeed Tech 3585392f7a3SLiteSpeed Tech 3595392f7a3SLiteSpeed Techstatic void 3605392f7a3SLiteSpeed Techqdh_in_on_write (struct lsquic_stream *stream, lsquic_stream_ctx_t *ctx) 3615392f7a3SLiteSpeed Tech{ 3625392f7a3SLiteSpeed Tech assert(0); 3635392f7a3SLiteSpeed Tech} 3645392f7a3SLiteSpeed Tech 3655392f7a3SLiteSpeed Tech 3665392f7a3SLiteSpeed Techstatic const struct lsquic_stream_if qdh_enc_sm_in_if = 3675392f7a3SLiteSpeed Tech{ 3685392f7a3SLiteSpeed Tech .on_new_stream = qdh_in_on_new, 3695392f7a3SLiteSpeed Tech .on_read = qdh_in_on_read, 3705392f7a3SLiteSpeed Tech .on_write = qdh_in_on_write, 3715392f7a3SLiteSpeed Tech .on_close = qdh_in_on_close, 3725392f7a3SLiteSpeed Tech}; 3735392f7a3SLiteSpeed Techconst struct lsquic_stream_if *const lsquic_qdh_enc_sm_in_if = 3745392f7a3SLiteSpeed Tech &qdh_enc_sm_in_if; 3755392f7a3SLiteSpeed Tech 3765392f7a3SLiteSpeed Tech 3775392f7a3SLiteSpeed Techstatic void 3785392f7a3SLiteSpeed Techqdh_hblock_unblocked (void *stream_p) 3795392f7a3SLiteSpeed Tech{ 3805392f7a3SLiteSpeed Tech struct lsquic_stream *const stream = stream_p; 3815392f7a3SLiteSpeed Tech struct qpack_dec_hdl *const qdh = lsquic_stream_get_qdh(stream); 3825392f7a3SLiteSpeed Tech 3835392f7a3SLiteSpeed Tech LSQ_DEBUG("header block for stream %"PRIu64" unblocked", stream->id); 3845392f7a3SLiteSpeed Tech lsquic_stream_qdec_unblocked(stream); 3855392f7a3SLiteSpeed Tech} 3865392f7a3SLiteSpeed Tech 3875392f7a3SLiteSpeed Tech 388747be414SDmitri Tikhonovstruct cont_len 389747be414SDmitri Tikhonov{ 390747be414SDmitri Tikhonov unsigned long long value; 391747be414SDmitri Tikhonov int has; /* 1: set, 0: not set, -1: invalid */ 392747be414SDmitri Tikhonov}; 393747be414SDmitri Tikhonov 394747be414SDmitri Tikhonov 395747be414SDmitri Tikhonovstatic void 396747be414SDmitri Tikhonovprocess_content_length (const struct qpack_dec_hdl *qdh /* for logging */, 397747be414SDmitri Tikhonov struct cont_len *cl, const char *val /* not NUL-terminated */, 398747be414SDmitri Tikhonov unsigned len) 399747be414SDmitri Tikhonov{ 400747be414SDmitri Tikhonov char *endcl, cont_len_buf[30]; 401747be414SDmitri Tikhonov 402747be414SDmitri Tikhonov if (0 == cl->has) 403747be414SDmitri Tikhonov { 404747be414SDmitri Tikhonov if (len >= sizeof(cont_len_buf)) 405747be414SDmitri Tikhonov { 406747be414SDmitri Tikhonov LSQ_DEBUG("content-length has invalid value `%.*s'", 407747be414SDmitri Tikhonov (int) len, val); 408747be414SDmitri Tikhonov cl->has = -1; 409747be414SDmitri Tikhonov return; 410747be414SDmitri Tikhonov } 411747be414SDmitri Tikhonov memcpy(cont_len_buf, val, len); 412747be414SDmitri Tikhonov cont_len_buf[len] = '\0'; 413747be414SDmitri Tikhonov cl->value = strtoull(cont_len_buf, &endcl, 10); 414747be414SDmitri Tikhonov if (*endcl == '\0' && !(ULLONG_MAX == cl->value && ERANGE == errno)) 415747be414SDmitri Tikhonov { 416747be414SDmitri Tikhonov cl->has = 1; 417747be414SDmitri Tikhonov LSQ_DEBUG("content length is %llu", cl->value); 418747be414SDmitri Tikhonov } 419747be414SDmitri Tikhonov else 420747be414SDmitri Tikhonov { 421747be414SDmitri Tikhonov cl->has = -1; 422747be414SDmitri Tikhonov LSQ_DEBUG("content-length has invalid value `%.*s'", 423747be414SDmitri Tikhonov (int) len, val); 424747be414SDmitri Tikhonov } 425747be414SDmitri Tikhonov } 426747be414SDmitri Tikhonov else if (cl->has > 0) 427747be414SDmitri Tikhonov { 428747be414SDmitri Tikhonov LSQ_DEBUG("header set has two content-length: ambiguous, " 429747be414SDmitri Tikhonov "turn off checking"); 430747be414SDmitri Tikhonov cl->has = -1; 431747be414SDmitri Tikhonov } 432747be414SDmitri Tikhonov} 433747be414SDmitri Tikhonov 434747be414SDmitri Tikhonov 435747be414SDmitri Tikhonovstatic int 436747be414SDmitri Tikhonovis_content_length (const struct lsqpack_header *header) 437747be414SDmitri Tikhonov{ 438747be414SDmitri Tikhonov return ((header->qh_flags & QH_ID_SET) && header->qh_static_id == 4) 439747be414SDmitri Tikhonov || (header->qh_name_len == 14 && header->qh_name[0] == 'c' 440747be414SDmitri Tikhonov && 0 == memcmp(header->qh_name + 1, "ontent-length", 13)) 441747be414SDmitri Tikhonov ; 442747be414SDmitri Tikhonov} 443747be414SDmitri Tikhonov 444747be414SDmitri Tikhonov 4455392f7a3SLiteSpeed Techstatic int 4465392f7a3SLiteSpeed Techqdh_supply_hset_to_stream (struct qpack_dec_hdl *qdh, 4475392f7a3SLiteSpeed Tech struct lsquic_stream *stream, struct lsqpack_header_list *qlist) 4485392f7a3SLiteSpeed Tech{ 4495392f7a3SLiteSpeed Tech const struct lsquic_hset_if *const hset_if = qdh->qdh_enpub->enp_hsi_if; 4505392f7a3SLiteSpeed Tech struct uncompressed_headers *uh = NULL; 4515392f7a3SLiteSpeed Tech const struct lsqpack_header *header; 452a5fa05f9SDmitri Tikhonov int st; 45302b6086dSDmitri Tikhonov int push_promise; 4545392f7a3SLiteSpeed Tech unsigned i; 4555392f7a3SLiteSpeed Tech void *hset; 456747be414SDmitri Tikhonov struct cont_len cl; 457a5fa05f9SDmitri Tikhonov struct lsxpack_header *xhdr; 458a5fa05f9SDmitri Tikhonov size_t extra; 4595392f7a3SLiteSpeed Tech 46002b6086dSDmitri Tikhonov push_promise = lsquic_stream_header_is_pp(stream); 46102b6086dSDmitri Tikhonov hset = hset_if->hsi_create_header_set(qdh->qdh_hsi_ctx, push_promise); 4625392f7a3SLiteSpeed Tech if (!hset) 4635392f7a3SLiteSpeed Tech { 4645392f7a3SLiteSpeed Tech LSQ_INFO("call to hsi_create_header_set failed"); 4655392f7a3SLiteSpeed Tech return -1; 4665392f7a3SLiteSpeed Tech } 4675392f7a3SLiteSpeed Tech 4685392f7a3SLiteSpeed Tech LSQ_DEBUG("got header set for stream %"PRIu64, stream->id); 4695392f7a3SLiteSpeed Tech 470747be414SDmitri Tikhonov cl.has = 0; 4715392f7a3SLiteSpeed Tech for (i = 0; i < qlist->qhl_count; ++i) 4725392f7a3SLiteSpeed Tech { 4735392f7a3SLiteSpeed Tech header = qlist->qhl_headers[i]; 4745392f7a3SLiteSpeed Tech LSQ_DEBUG("%.*s: %.*s", header->qh_name_len, header->qh_name, 4755392f7a3SLiteSpeed Tech header->qh_value_len, header->qh_value); 476a5fa05f9SDmitri Tikhonov extra = header->qh_name_len + header->qh_value_len + 4; 477a5fa05f9SDmitri Tikhonov xhdr = hset_if->hsi_prepare_decode(hset, NULL, extra); 478a5fa05f9SDmitri Tikhonov if (!xhdr) 479a137764bSDmitri Tikhonov { 480a5fa05f9SDmitri Tikhonov LSQ_DEBUG("prepare_decode(%zd) failed", extra); 481a5fa05f9SDmitri Tikhonov goto err; 482a5fa05f9SDmitri Tikhonov } 483a5fa05f9SDmitri Tikhonov memcpy(xhdr->buf + xhdr->name_offset, header->qh_name, 484a5fa05f9SDmitri Tikhonov header->qh_name_len); 485a5fa05f9SDmitri Tikhonov xhdr->name_len = header->qh_name_len; 486a5fa05f9SDmitri Tikhonov memcpy(xhdr->buf + xhdr->name_offset + xhdr->name_len, ": ", 2); 487a5fa05f9SDmitri Tikhonov xhdr->val_offset = xhdr->name_offset + xhdr->name_len + 2; 488a5fa05f9SDmitri Tikhonov memcpy(xhdr->buf + xhdr->val_offset, 489a5fa05f9SDmitri Tikhonov header->qh_value, header->qh_value_len); 490a5fa05f9SDmitri Tikhonov xhdr->val_len = header->qh_value_len; 491a5fa05f9SDmitri Tikhonov memcpy(xhdr->buf + xhdr->name_offset + xhdr->name_len + 2 492a5fa05f9SDmitri Tikhonov + xhdr->val_len, "\r\n", 2); 493a5fa05f9SDmitri Tikhonov xhdr->dec_overhead = 4; 494a5fa05f9SDmitri Tikhonov if (header->qh_flags & QH_ID_SET) 495a5fa05f9SDmitri Tikhonov { 496a5fa05f9SDmitri Tikhonov xhdr->flags |= LSXPACK_QPACK_IDX; 497a5fa05f9SDmitri Tikhonov xhdr->qpack_index = header->qh_static_id; 498a5fa05f9SDmitri Tikhonov } 499a5fa05f9SDmitri Tikhonov st = hset_if->hsi_process_header(hset, xhdr); 500a5fa05f9SDmitri Tikhonov if (st != 0) 501a5fa05f9SDmitri Tikhonov { 502a5fa05f9SDmitri Tikhonov LSQ_INFO("header process returned non-OK code %d", st); 5035392f7a3SLiteSpeed Tech goto err; 504a137764bSDmitri Tikhonov } 505747be414SDmitri Tikhonov if (is_content_length(header)) 506747be414SDmitri Tikhonov process_content_length(qdh, &cl, header->qh_value, 507747be414SDmitri Tikhonov header->qh_value_len); 5085392f7a3SLiteSpeed Tech } 5095392f7a3SLiteSpeed Tech 5105392f7a3SLiteSpeed Tech lsqpack_dec_destroy_header_list(qlist); 511a0e1aeeeSDmitri Tikhonov qlist = NULL; 512a5fa05f9SDmitri Tikhonov st = hset_if->hsi_process_header(hset, NULL); 513a5fa05f9SDmitri Tikhonov if (st != 0) 5145392f7a3SLiteSpeed Tech goto err; 5155392f7a3SLiteSpeed Tech 5165392f7a3SLiteSpeed Tech uh = calloc(1, sizeof(*uh)); 5175392f7a3SLiteSpeed Tech if (!uh) 5185392f7a3SLiteSpeed Tech goto err; 5195392f7a3SLiteSpeed Tech uh->uh_stream_id = stream->id; 5205392f7a3SLiteSpeed Tech uh->uh_oth_stream_id = 0; 5215392f7a3SLiteSpeed Tech uh->uh_weight = 0; 5225392f7a3SLiteSpeed Tech uh->uh_exclusive = -1; 5235392f7a3SLiteSpeed Tech if (hset_if == lsquic_http1x_if) 5245392f7a3SLiteSpeed Tech uh->uh_flags |= UH_H1H; 5255392f7a3SLiteSpeed Tech uh->uh_hset = hset; 5265392f7a3SLiteSpeed Tech if (0 != lsquic_stream_uh_in(stream, uh)) 5275392f7a3SLiteSpeed Tech goto err; 5285392f7a3SLiteSpeed Tech LSQ_DEBUG("converted qlist to hset and gave it to stream %"PRIu64, 5295392f7a3SLiteSpeed Tech stream->id); 530747be414SDmitri Tikhonov if (cl.has > 0) 531747be414SDmitri Tikhonov (void) lsquic_stream_verify_len(stream, cl.value); 5325392f7a3SLiteSpeed Tech return 0; 5335392f7a3SLiteSpeed Tech 5345392f7a3SLiteSpeed Tech err: 535a0e1aeeeSDmitri Tikhonov if (qlist) 536a0e1aeeeSDmitri Tikhonov lsqpack_dec_destroy_header_list(qlist); 5375392f7a3SLiteSpeed Tech hset_if->hsi_discard_header_set(hset); 5385392f7a3SLiteSpeed Tech free(uh); 5395392f7a3SLiteSpeed Tech return -1; 5405392f7a3SLiteSpeed Tech} 5415392f7a3SLiteSpeed Tech 5425392f7a3SLiteSpeed Tech 54310c41073SDmitri Tikhonov/* Releases qlist */ 54402b6086dSDmitri Tikhonovstatic int 54502b6086dSDmitri Tikhonovqdh_process_qlist (struct qpack_dec_hdl *qdh, 54602b6086dSDmitri Tikhonov struct lsquic_stream *stream, struct lsqpack_header_list *qlist) 54702b6086dSDmitri Tikhonov{ 54802b6086dSDmitri Tikhonov if (!lsquic_stream_header_is_trailer(stream)) 54902b6086dSDmitri Tikhonov return qdh_supply_hset_to_stream(qdh, stream, qlist); 55002b6086dSDmitri Tikhonov else 55102b6086dSDmitri Tikhonov { 55202b6086dSDmitri Tikhonov LSQ_DEBUG("discard trailer header set"); 55302b6086dSDmitri Tikhonov lsqpack_dec_destroy_header_list(qlist); 55402b6086dSDmitri Tikhonov return 0; 55502b6086dSDmitri Tikhonov } 55602b6086dSDmitri Tikhonov} 55702b6086dSDmitri Tikhonov 55802b6086dSDmitri Tikhonov 5595392f7a3SLiteSpeed Techstatic enum lsqpack_read_header_status 5605392f7a3SLiteSpeed Techqdh_header_read_results (struct qpack_dec_hdl *qdh, 5615392f7a3SLiteSpeed Tech struct lsquic_stream *stream, enum lsqpack_read_header_status rhs, 5625392f7a3SLiteSpeed Tech struct lsqpack_header_list *qlist, const unsigned char *dec_buf, 5635392f7a3SLiteSpeed Tech size_t dec_buf_sz) 5645392f7a3SLiteSpeed Tech{ 5655392f7a3SLiteSpeed Tech const struct lsqpack_dec_err *qerr; 5665392f7a3SLiteSpeed Tech 5675392f7a3SLiteSpeed Tech if (rhs == LQRHS_DONE) 5685392f7a3SLiteSpeed Tech { 5695392f7a3SLiteSpeed Tech if (qlist) 5705392f7a3SLiteSpeed Tech { 57102b6086dSDmitri Tikhonov if (0 != qdh_process_qlist(qdh, stream, qlist)) 5725392f7a3SLiteSpeed Tech return LQRHS_ERROR; 5735392f7a3SLiteSpeed Tech if (qdh->qdh_dec_sm_out) 5745392f7a3SLiteSpeed Tech { 5755392f7a3SLiteSpeed Tech if (dec_buf_sz 5765392f7a3SLiteSpeed Tech && 0 != qdh_write_decoder(qdh, dec_buf, dec_buf_sz)) 5775392f7a3SLiteSpeed Tech { 5785392f7a3SLiteSpeed Tech return LQRHS_ERROR; 5795392f7a3SLiteSpeed Tech } 5805392f7a3SLiteSpeed Tech if (dec_buf_sz || lsqpack_dec_ici_pending(&qdh->qdh_decoder)) 5815392f7a3SLiteSpeed Tech lsquic_stream_wantwrite(qdh->qdh_dec_sm_out, 1); 5825392f7a3SLiteSpeed Tech } 5835392f7a3SLiteSpeed Tech } 5845392f7a3SLiteSpeed Tech else 5855392f7a3SLiteSpeed Tech { 58610c41073SDmitri Tikhonov LSQ_WARN("read header status is DONE but header list is not set"); 58710c41073SDmitri Tikhonov assert(0); 5885392f7a3SLiteSpeed Tech return LQRHS_ERROR; 5895392f7a3SLiteSpeed Tech } 5905392f7a3SLiteSpeed Tech } 5915392f7a3SLiteSpeed Tech else if (rhs == LQRHS_ERROR) 5925392f7a3SLiteSpeed Tech { 5935392f7a3SLiteSpeed Tech qerr = lsqpack_dec_get_err_info(&qdh->qdh_decoder); 5945392f7a3SLiteSpeed Tech qdh->qdh_conn->cn_if->ci_abort_error(qdh->qdh_conn, 1, 5955392f7a3SLiteSpeed Tech HEC_QPACK_DECOMPRESSION_FAILED, "QPACK decompression error; " 5965392f7a3SLiteSpeed Tech "stream %"PRIu64", offset %"PRIu64", line %d", qerr->stream_id, 5975392f7a3SLiteSpeed Tech qerr->off, qerr->line); 5985392f7a3SLiteSpeed Tech } 5995392f7a3SLiteSpeed Tech 6005392f7a3SLiteSpeed Tech return rhs; 6015392f7a3SLiteSpeed Tech} 6025392f7a3SLiteSpeed Tech 6035392f7a3SLiteSpeed Tech 6045392f7a3SLiteSpeed Techenum lsqpack_read_header_status 6055392f7a3SLiteSpeed Techlsquic_qdh_header_in_begin (struct qpack_dec_hdl *qdh, 6065392f7a3SLiteSpeed Tech struct lsquic_stream *stream, uint64_t header_size, 6075392f7a3SLiteSpeed Tech const unsigned char **buf, size_t bufsz) 6085392f7a3SLiteSpeed Tech{ 6095392f7a3SLiteSpeed Tech enum lsqpack_read_header_status rhs; 6105392f7a3SLiteSpeed Tech struct lsqpack_header_list *qlist; 6115392f7a3SLiteSpeed Tech size_t dec_buf_sz; 6125392f7a3SLiteSpeed Tech unsigned char dec_buf[LSQPACK_LONGEST_HEADER_ACK]; 6135392f7a3SLiteSpeed Tech 6145392f7a3SLiteSpeed Tech if (qdh->qdh_flags & QDH_INITIALIZED) 6155392f7a3SLiteSpeed Tech { 6165392f7a3SLiteSpeed Tech dec_buf_sz = sizeof(dec_buf); 6175392f7a3SLiteSpeed Tech rhs = lsqpack_dec_header_in(&qdh->qdh_decoder, stream, stream->id, 6185392f7a3SLiteSpeed Tech header_size, buf, bufsz, &qlist, dec_buf, &dec_buf_sz); 6195392f7a3SLiteSpeed Tech return qdh_header_read_results(qdh, stream, rhs, qlist, dec_buf, 6205392f7a3SLiteSpeed Tech dec_buf_sz); 6215392f7a3SLiteSpeed Tech } 6225392f7a3SLiteSpeed Tech else 6235392f7a3SLiteSpeed Tech { 6245392f7a3SLiteSpeed Tech LSQ_WARN("not initialized: cannot process header block"); 6255392f7a3SLiteSpeed Tech return LQRHS_ERROR; 6265392f7a3SLiteSpeed Tech } 6275392f7a3SLiteSpeed Tech 6285392f7a3SLiteSpeed Tech} 6295392f7a3SLiteSpeed Tech 6305392f7a3SLiteSpeed Tech 6315392f7a3SLiteSpeed Techenum lsqpack_read_header_status 6325392f7a3SLiteSpeed Techlsquic_qdh_header_in_continue (struct qpack_dec_hdl *qdh, 6335392f7a3SLiteSpeed Tech struct lsquic_stream *stream, const unsigned char **buf, size_t bufsz) 6345392f7a3SLiteSpeed Tech{ 6355392f7a3SLiteSpeed Tech enum lsqpack_read_header_status rhs; 6365392f7a3SLiteSpeed Tech struct lsqpack_header_list *qlist; 6375392f7a3SLiteSpeed Tech size_t dec_buf_sz; 6385392f7a3SLiteSpeed Tech unsigned char dec_buf[LSQPACK_LONGEST_HEADER_ACK]; 6395392f7a3SLiteSpeed Tech 6405392f7a3SLiteSpeed Tech if (qdh->qdh_flags & QDH_INITIALIZED) 6415392f7a3SLiteSpeed Tech { 6425392f7a3SLiteSpeed Tech dec_buf_sz = sizeof(dec_buf); 6435392f7a3SLiteSpeed Tech rhs = lsqpack_dec_header_read(&qdh->qdh_decoder, stream, 6445392f7a3SLiteSpeed Tech buf, bufsz, &qlist, dec_buf, &dec_buf_sz); 6455392f7a3SLiteSpeed Tech return qdh_header_read_results(qdh, stream, rhs, qlist, dec_buf, 6465392f7a3SLiteSpeed Tech dec_buf_sz); 6475392f7a3SLiteSpeed Tech } 6485392f7a3SLiteSpeed Tech else 6495392f7a3SLiteSpeed Tech { 6505392f7a3SLiteSpeed Tech LSQ_WARN("not initialized: cannot process header block"); 6515392f7a3SLiteSpeed Tech return LQRHS_ERROR; 6525392f7a3SLiteSpeed Tech } 6535392f7a3SLiteSpeed Tech} 6545392f7a3SLiteSpeed Tech 6555392f7a3SLiteSpeed Tech 6565392f7a3SLiteSpeed Techvoid 6575392f7a3SLiteSpeed Techlsquic_qdh_unref_stream (struct qpack_dec_hdl *qdh, 6585392f7a3SLiteSpeed Tech struct lsquic_stream *stream) 6595392f7a3SLiteSpeed Tech{ 6605392f7a3SLiteSpeed Tech if (0 == lsqpack_dec_unref_stream(&qdh->qdh_decoder, stream)) 6615392f7a3SLiteSpeed Tech LSQ_DEBUG("unreffed stream %"PRIu64, stream->id); 6625392f7a3SLiteSpeed Tech else 6635392f7a3SLiteSpeed Tech LSQ_WARN("cannot unref stream %"PRIu64, stream->id); 6645392f7a3SLiteSpeed Tech} 6655392f7a3SLiteSpeed Tech 6665392f7a3SLiteSpeed Tech 6675392f7a3SLiteSpeed Techvoid 6685392f7a3SLiteSpeed Techlsquic_qdh_cancel_stream (struct qpack_dec_hdl *qdh, 6695392f7a3SLiteSpeed Tech struct lsquic_stream *stream) 6705392f7a3SLiteSpeed Tech{ 6715392f7a3SLiteSpeed Tech ssize_t nw; 6725392f7a3SLiteSpeed Tech unsigned char buf[LSQPACK_LONGEST_CANCEL]; 6735392f7a3SLiteSpeed Tech 6745392f7a3SLiteSpeed Tech nw = lsqpack_dec_cancel_stream(&qdh->qdh_decoder, stream, buf, sizeof(buf)); 6755392f7a3SLiteSpeed Tech if (nw > 0) 6765392f7a3SLiteSpeed Tech { 6775392f7a3SLiteSpeed Tech if (0 == qdh_write_decoder(qdh, buf, nw)) 6785392f7a3SLiteSpeed Tech LSQ_DEBUG("cancelled stream %"PRIu64" and wrote %zd-byte Cancel " 6795392f7a3SLiteSpeed Tech "Stream instruction to the decoder stream", stream->id, nw); 6805392f7a3SLiteSpeed Tech } 6815392f7a3SLiteSpeed Tech else if (nw == 0) 6825392f7a3SLiteSpeed Tech LSQ_WARN("cannot cancel stream %"PRIu64" -- not found", stream->id); 6835392f7a3SLiteSpeed Tech else 6845392f7a3SLiteSpeed Tech { 6855392f7a3SLiteSpeed Tech LSQ_WARN("cannot cancel stream %"PRIu64" -- not enough buffer space " 6865392f7a3SLiteSpeed Tech "to encode Cancel Stream instructin", stream->id); 6875392f7a3SLiteSpeed Tech lsquic_qdh_unref_stream(qdh, stream); 6885392f7a3SLiteSpeed Tech } 6895392f7a3SLiteSpeed Tech} 690747be414SDmitri Tikhonov 691747be414SDmitri Tikhonov 692747be414SDmitri Tikhonovint 693747be414SDmitri Tikhonovlsquic_qdh_arm_if_unsent (struct qpack_dec_hdl *qdh, void (*func)(void *), 694747be414SDmitri Tikhonov void *ctx) 695747be414SDmitri Tikhonov{ 696747be414SDmitri Tikhonov size_t bytes; 697747be414SDmitri Tikhonov 698747be414SDmitri Tikhonov /* Use size of a single frab list buffer as an arbitrary threshold */ 699747be414SDmitri Tikhonov bytes = lsquic_frab_list_size(&qdh->qdh_fral); 700747be414SDmitri Tikhonov if (bytes <= qdh->qdh_fral.fl_buf_size) 701747be414SDmitri Tikhonov return 0; 702747be414SDmitri Tikhonov else 703747be414SDmitri Tikhonov { 704747be414SDmitri Tikhonov LSQ_DEBUG("have %zu bytes of unsent QPACK decoder stream data: set " 705747be414SDmitri Tikhonov "up callback", bytes); 706747be414SDmitri Tikhonov qdh->qdh_on_dec_sent_func = func; 707747be414SDmitri Tikhonov qdh->qdh_on_dec_sent_ctx = ctx; 708747be414SDmitri Tikhonov return 1; 709747be414SDmitri Tikhonov } 710747be414SDmitri Tikhonov} 711