/* Copyright (c) 2017 - 2020 LiteSpeed Technologies Inc. See LICENSE. */ #include #include #include #include #ifndef WIN32 #include #else #include "vc_compat.h" #endif #include "lsquic_types.h" #include "lsquic_parse.h" #include "lsquic_rechist.h" #include "lsquic_util.h" #include "lsquic.h" #include "lsquic_hash.h" #include "lsquic_conn.h" static struct lsquic_conn lconn = LSCONN_INITIALIZER_CIDLEN(lconn, 0); static const struct parse_funcs *const pf = select_pf_by_ver(LSQVER_043); static lsquic_packno_t n_acked (const struct ack_info *acki) { lsquic_packno_t n = 0; unsigned i; for (i = 0; i < acki->n_ranges; ++i) n += acki->ranges[i].high - acki->ranges[i].low + 1; return n; } static void test1 (void) { /* Test taken from quic_framer_test.cc -- NewAckFrameOneAckBlock */ unsigned char ack_buf[] = { 0x45, 0x12, 0x34, /* Largest acked */ 0x00, 0x00, /* Delta time */ 0x12, 0x34, /* Block length */ 0x00, /* Number of timestamps */ }; struct ack_info acki; memset(&acki, 0xF1, sizeof(acki)); int len = pf->pf_parse_ack_frame(ack_buf, sizeof(ack_buf), &acki, 0); assert(("Parsed length is correct (8)", len == sizeof(ack_buf))); assert(("Number of ranges is 1", acki.n_ranges == 1)); assert(("Largest acked is 0x1234", acki.ranges[0].high == 0x1234)); assert(("Lowest acked is 1", acki.ranges[0].low == 1)); unsigned n = n_acked(&acki); assert(("Number of acked packets is 0x1234", n == 0x1234)); { size_t sz; for (sz = 1; sz < sizeof(ack_buf); ++sz) { len = pf->pf_parse_ack_frame(ack_buf, sz, &acki, 0); assert(("Parsing truncated frame failed", len < 0)); } } } static void test2 (void) { /* Test taken from quic_framer_test.cc -- NewAckFrameOneAckBlock */ unsigned char ack_buf[] = { 0x65, 0x12, 0x34, /* Largest acked */ 0x00, 0x00, /* Zero delta time. */ 0x04, /* Num ack blocks ranges. */ 0x00, 0x01, /* First ack block length. */ 0x01, /* Gap to next block. */ 0x0e, 0xaf, /* Ack block length. */ 0xff, /* Gap to next block. */ 0x00, 0x00, /* Ack block length. */ 0x91, /* Gap to next block. */ 0x01, 0xea, /* Ack block length. */ 0x05, /* Gap to next block. */ 0x00, 0x04, /* Ack block length. */ 0x02, /* Number of timestamps. */ 0x01, /* Delta from largest observed. */ 0x10, 0x32, 0x54, 0x76, /* Delta time. */ /* XXX do we use this at all? */ 0x02, /* Delta from largest observed. */ 0x10, 0x32, /* Delta time. */ }; /* We should get the following array of ranges: * high low * 0x1234 0x1234 * 0x1232 0x384 * 0x1F3 0xA * 0x4 0x1 */ static const struct { unsigned high, low; } ranges[] = { { 0x1234, 0x1234 }, { 0x1232, 0x384 }, { 0x1F3, 0xA }, { 0x4, 0x1 }, }; struct ack_info acki; memset(&acki, 0xF1, sizeof(acki)); int len = pf->pf_parse_ack_frame(ack_buf, sizeof(ack_buf), &acki, 0); assert(("Parsed length is correct (29)", len == sizeof(ack_buf))); assert(("Number of ranges is 4", acki.n_ranges == 4)); assert(("Largest acked is 0x1234", acki.ranges[0].high == 0x1234)); unsigned n = n_acked(&acki); assert(("Number of acked packets is 4254", n == 4254)); for (n = 0; n < 4; ++n) assert(("Range checks out", ranges[n].high == acki.ranges[n].high && ranges[n].low == acki.ranges[n].low)); { size_t sz; for (sz = 1; sz < sizeof(ack_buf); ++sz) { len = pf->pf_parse_ack_frame(ack_buf, sz, &acki, 0); assert(("Parsing truncated frame failed", len < 0)); } } } static void test3 (void) { /* Generated by our own code, but failed to parse... */ unsigned char ack_buf[] = { 0x60, /* More than one ack block, 1 byte largest observed, 1 byte block length */ 0x06, /* Largest ACKed */ 0x00, 0x00, /* Delta time */ 0x01, /* Num ACK block ranges */ 0x01, /* First ACK block length */ 0x02, /* Gap to next block */ 0x03, /* Ack block length */ 0x00 /* Number of timestamps */ }; /* We should get the following array of ranges: * high low * 6 6 * 3 1 */ static const struct { unsigned high, low; } ranges[] = { { 6, 6, }, { 3, 1, }, }; struct ack_info acki; memset(&acki, 0xF1, sizeof(acki)); int len = pf->pf_parse_ack_frame(ack_buf, sizeof(ack_buf), &acki, 0); assert(("Parsed length is correct (9)", len == sizeof(ack_buf))); assert(("Number of ranges is 2", acki.n_ranges == 2)); assert(("Largest acked is 6", acki.ranges[0].high == 6)); unsigned n = n_acked(&acki); assert(("Number of acked packets is 4", n == 4)); for (n = 0; n < 2; ++n) assert(("Range checks out", ranges[n].high == acki.ranges[n].high && ranges[n].low == acki.ranges[n].low)); { size_t sz; for (sz = 1; sz < sizeof(ack_buf); ++sz) { len = pf->pf_parse_ack_frame(ack_buf, sz, &acki, 0); assert(("Parsing truncated frame failed", len < 0)); } } } static void test4 (void) { unsigned char ack_buf[] = { 0x60, /* More than one ack block, 1 byte largest observed, 1 byte block length */ 0x03, /* Largest ACKed */ 0x23, 0x00, /* Delta time */ 0x01, /* Num ACK block ranges */ 0x01, /* First ack block length */ 0x01, /* Gap */ 0x01, /* Ack block length */ 0x00, /* Number of timestamps */ }; /* We should get the following array of ranges: * high low * 6 6 * 3 1 */ static const struct { unsigned high, low; } ranges[] = { { 3, 3, }, { 1, 1, }, }; struct ack_info acki; memset(&acki, 0xF1, sizeof(acki)); int len = pf->pf_parse_ack_frame(ack_buf, sizeof(ack_buf), &acki, 0); assert(("Parsed length is correct (9)", len == sizeof(ack_buf))); assert(("Number of ranges is 2", acki.n_ranges == 2)); assert(("Largest acked is 3", acki.ranges[0].high == 3)); unsigned n = n_acked(&acki); assert(("Number of acked packets is 2", n == 2)); for (n = 0; n < 2; ++n) assert(("Range checks out", ranges[n].high == acki.ranges[n].high && ranges[n].low == acki.ranges[n].low)); { size_t sz; for (sz = 1; sz < sizeof(ack_buf); ++sz) { len = pf->pf_parse_ack_frame(ack_buf, sz, &acki, 0); assert(("Parsing truncated frame failed", len < 0)); } } } /* Four-byte packet numbers */ static void test5 (void) { unsigned char ack_buf[] = { 0x60 | (2 << 2) /* Four-byte largest acked */ | (2 << 0) /* Four-byte ACK block length */ , 0x23, 0x45, 0x67, 0x89, 0x00, 0x00, /* Zero delta time. */ 0x01, /* Num ack blocks ranges. */ 0x00, 0x00, 0x00, 0x01, /* First ack block length. */ 33 - 1, /* Gap to next block. */ 0x23, 0x45, 0x67, 0x68, /* Ack block length. */ 0x00, /* Number of timestamps. */ }; /* We should get the following array of ranges: * high low * 6 6 * 3 1 */ static const struct { unsigned high, low; } ranges[] = { { 0x23456789, 0x23456789, }, { 0x23456768, 1, }, }; struct ack_info acki; memset(&acki, 0xF1, sizeof(acki)); int len = pf->pf_parse_ack_frame(ack_buf, sizeof(ack_buf), &acki, 0); assert(("Parsed length is correct (9)", len == sizeof(ack_buf))); assert(("Number of ranges is 2", acki.n_ranges == 2)); assert(("Largest acked is 0x23456789", acki.ranges[0].high == 0x23456789)); lsquic_packno_t n = n_acked(&acki); assert(("Number of acked packets is correct", n == 0x23456768 + 1)); for (n = 0; n < 2; ++n) assert(("Range checks out", ranges[n].high == acki.ranges[n].high && ranges[n].low == acki.ranges[n].low)); { size_t sz; for (sz = 1; sz < sizeof(ack_buf); ++sz) { len = pf->pf_parse_ack_frame(ack_buf, sz, &acki, 0); assert(("Parsing truncated frame failed", len < 0)); } } } /* Six-byte packet numbers */ static void test6 (void) { unsigned char ack_buf[] = { 0x60 | (3 << 2) /* Six-byte largest acked */ | (3 << 0) /* Six-byte ACK block length */ , 0xAB, 0xCD, 0x23, 0x45, 0x67, 0x89, 0x00, 0x00, /* Zero delta time. */ 0x01, /* Num ack blocks ranges. */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, /* First ack block length. */ 33 - 1, /* Gap to next block. */ 0xAB, 0xCD, 0x23, 0x45, 0x67, 0x68, /* Ack block length. */ 0x00, /* Number of timestamps. */ }; static const struct { lsquic_packno_t high, low; } ranges[] = { { 0xABCD23456789, 0xABCD23456789, }, { 0xABCD23456768, 1, }, }; struct ack_info acki; memset(&acki, 0xF1, sizeof(acki)); int len = pf->pf_parse_ack_frame(ack_buf, sizeof(ack_buf), &acki, 0); assert(("Parsed length is correct", len == sizeof(ack_buf))); assert(("Number of ranges is 2", acki.n_ranges == 2)); assert(("Largest acked is 0xABCD23456789", acki.ranges[0].high == 0xABCD23456789)); lsquic_packno_t n = n_acked(&acki); assert(("Number of acked packets is correct", n == 0xABCD23456768 + 1)); for (n = 0; n < 2; ++n) assert(("Range checks out", ranges[n].high == acki.ranges[n].high && ranges[n].low == acki.ranges[n].low)); { size_t sz; for (sz = 1; sz < sizeof(ack_buf); ++sz) { len = pf->pf_parse_ack_frame(ack_buf, sz, &acki, 0); assert(("Parsing truncated frame failed", len < 0)); } } } static void test_max_ack (void) { lsquic_rechist_t rechist; lsquic_time_t now; unsigned i; int has_missing, sz[2]; const struct lsquic_packno_range *range; unsigned char buf[1500]; struct ack_info acki; lsquic_rechist_init(&rechist, &lconn, 0); now = lsquic_time_now(); for (i = 1; i <= 300; ++i) { lsquic_rechist_received(&rechist, i * 10, now); now += i * 1000; } memset(buf, 0xAA, sizeof(buf)); lsquic_packno_t largest = 0; sz[0] = pf->pf_gen_ack_frame(buf, sizeof(buf), (gaf_rechist_first_f) lsquic_rechist_first, (gaf_rechist_next_f) lsquic_rechist_next, (gaf_rechist_largest_recv_f) lsquic_rechist_largest_recv, &rechist, now, &has_missing, &largest, NULL); assert(sz[0] > 0); assert(sz[0] <= (int) sizeof(buf)); assert(has_missing); assert(0 == buf[ sz[0] - 1 ]); /* Number of timestamps */ assert(0xAA == buf[ sz[0] ]); sz[1] = pf->pf_parse_ack_frame(buf, sizeof(buf), &acki, 0); assert(sz[1] == sz[0]); assert(256 == acki.n_ranges); for (range = lsquic_rechist_first(&rechist), i = 0; range && i < acki.n_ranges; range = lsquic_rechist_next(&rechist), ++i) { assert(range->high == acki.ranges[i].high); assert(range->low == acki.ranges[i].low); } assert(i == 256); lsquic_rechist_cleanup(&rechist); } static void test_ack_truncation (void) { lsquic_rechist_t rechist; lsquic_time_t now; unsigned i; int has_missing, sz[2]; const struct lsquic_packno_range *range; unsigned char buf[1500]; struct ack_info acki; size_t bufsz; lsquic_rechist_init(&rechist, &lconn, 0); now = lsquic_time_now(); for (i = 1; i <= 300; ++i) { lsquic_rechist_received(&rechist, i * 10, now); now += i * 1000; } for (bufsz = 200; bufsz < 210; ++bufsz) { memset(buf, 0xAA, sizeof(buf)); lsquic_packno_t largest = 0; sz[0] = pf->pf_gen_ack_frame(buf, bufsz, (gaf_rechist_first_f) lsquic_rechist_first, (gaf_rechist_next_f) lsquic_rechist_next, (gaf_rechist_largest_recv_f) lsquic_rechist_largest_recv, &rechist, now, &has_missing, &largest, NULL); assert(sz[0] > 0); assert(sz[0] <= (int) bufsz); assert(has_missing); assert(0 == buf[ sz[0] - 1 ]); /* Number of timestamps */ assert(0xAA == buf[ sz[0] ]); sz[1] = pf->pf_parse_ack_frame(buf, sizeof(buf), &acki, 0); assert(sz[1] == sz[0]); assert(acki.n_ranges < 256); for (range = lsquic_rechist_first(&rechist), i = 0; range && i < acki.n_ranges; range = lsquic_rechist_next(&rechist), ++i) { assert(range->high == acki.ranges[i].high); assert(range->low == acki.ranges[i].low); } } lsquic_rechist_cleanup(&rechist); } static void test_empty_ack (void) { int len; unsigned char buf[] = { 0x40, 0x00, 0xFF, 0xFF, 0x00, 0x00, /* fluff: */ 0x12, 0x23, 0x34, 0x45, }; struct ack_info acki; len = pf->pf_parse_ack_frame(buf, sizeof(buf), &acki, 0); assert(6 == len); assert(empty_ack_frame(&acki)); } int main (void) { lsquic_global_init(LSQUIC_GLOBAL_SERVER); test1(); test2(); test3(); test4(); test5(); test6(); test_max_ack(); test_ack_truncation(); test_empty_ack(); return 0; }