lsquic_version.c revision 06b2a236
106b2a236SDmitri Tikhonov/* Copyright (c) 2017 - 2021 LiteSpeed Technologies Inc. See LICENSE. */ 250aadb33SDmitri Tikhonov#include <string.h> 350aadb33SDmitri Tikhonov 450aadb33SDmitri Tikhonov#include "lsquic.h" 550aadb33SDmitri Tikhonov#include "lsquic_int_types.h" 650aadb33SDmitri Tikhonov#include "lsquic_version.h" 750aadb33SDmitri Tikhonov 8fb3e20e0SDmitri Tikhonov#if _MSC_VER 9fb3e20e0SDmitri Tikhonov#include "vc_compat.h" 10fb3e20e0SDmitri Tikhonov#endif 11fb3e20e0SDmitri Tikhonov 1250aadb33SDmitri Tikhonov 1350aadb33SDmitri Tikhonovstatic const unsigned char version_tags[N_LSQVER][4] = 1450aadb33SDmitri Tikhonov{ 15c95974e9SDmitri Tikhonov [LSQVER_043] = { 'Q', '0', '4', '3', }, 16c7d81ce1SDmitri Tikhonov [LSQVER_046] = { 'Q', '0', '4', '6', }, 177a8b2eceSDmitri Tikhonov [LSQVER_050] = { 'Q', '0', '5', '0', }, 189626cfc2SDmitri Tikhonov#if LSQUIC_USE_Q098 199626cfc2SDmitri Tikhonov [LSQVER_098] = { 'Q', '0', '9', '8', }, 209626cfc2SDmitri Tikhonov#endif 21bc520ef7SDmitri Tikhonov [LSQVER_ID27] = { 0xFF, 0, 0, 27, }, 22fb73393fSDmitri Tikhonov [LSQVER_ID28] = { 0xFF, 0, 0, 28, }, 234051ae3aSDmitri Tikhonov [LSQVER_ID29] = { 0xFF, 0, 0, 29, }, 244429f8eaSDmitri Tikhonov [LSQVER_ID32] = { 0xFF, 0, 0, 32, }, 255392f7a3SLiteSpeed Tech [LSQVER_VERNEG] = { 0xFA, 0xFA, 0xFA, 0xFA, }, 2650aadb33SDmitri Tikhonov}; 2750aadb33SDmitri Tikhonov 2850aadb33SDmitri Tikhonov 2950aadb33SDmitri Tikhonovuint32_t 3050aadb33SDmitri Tikhonovlsquic_ver2tag (unsigned version) 3150aadb33SDmitri Tikhonov{ 3250aadb33SDmitri Tikhonov lsquic_ver_tag_t tag; 3350aadb33SDmitri Tikhonov if (version < N_LSQVER) 3450aadb33SDmitri Tikhonov { 3550aadb33SDmitri Tikhonov memcpy(&tag, version_tags[version], 4); 3650aadb33SDmitri Tikhonov return tag; 3750aadb33SDmitri Tikhonov } 3850aadb33SDmitri Tikhonov else 3950aadb33SDmitri Tikhonov return 0; 4050aadb33SDmitri Tikhonov} 4150aadb33SDmitri Tikhonov 4250aadb33SDmitri Tikhonov 4350aadb33SDmitri Tikhonovenum lsquic_version 4450aadb33SDmitri Tikhonovlsquic_tag2ver (uint32_t ver_tag) 4550aadb33SDmitri Tikhonov{ 4650aadb33SDmitri Tikhonov unsigned n; 4750aadb33SDmitri Tikhonov for (n = 0; n < sizeof(version_tags) / sizeof(version_tags[0]); ++n) 4850aadb33SDmitri Tikhonov if (0 == memcmp(version_tags[n], &ver_tag, sizeof(ver_tag))) 4950aadb33SDmitri Tikhonov return n; 5050aadb33SDmitri Tikhonov return -1; 5150aadb33SDmitri Tikhonov} 5250aadb33SDmitri Tikhonov 5350aadb33SDmitri Tikhonov 545392f7a3SLiteSpeed Techconst char *const lsquic_ver2str[N_LSQVER] = { 555392f7a3SLiteSpeed Tech [LSQVER_043] = "Q043", 565392f7a3SLiteSpeed Tech [LSQVER_046] = "Q046", 577a8b2eceSDmitri Tikhonov [LSQVER_050] = "Q050", 585392f7a3SLiteSpeed Tech#if LSQUIC_USE_Q098 595392f7a3SLiteSpeed Tech [LSQVER_098] = "Q098", 605392f7a3SLiteSpeed Tech#endif 61bc520ef7SDmitri Tikhonov [LSQVER_ID27] = "FF00001B", 62fb73393fSDmitri Tikhonov [LSQVER_ID28] = "FF00001C", 634051ae3aSDmitri Tikhonov [LSQVER_ID29] = "FF00001D", 644429f8eaSDmitri Tikhonov [LSQVER_ID32] = "FF000020", 655392f7a3SLiteSpeed Tech [LSQVER_VERNEG] = "FAFAFAFA", 665392f7a3SLiteSpeed Tech}; 675392f7a3SLiteSpeed Tech 685392f7a3SLiteSpeed Tech 6950aadb33SDmitri Tikhonovenum lsquic_version 7050aadb33SDmitri Tikhonovlsquic_str2ver (const char *str, size_t len) 7150aadb33SDmitri Tikhonov{ 725392f7a3SLiteSpeed Tech enum lsquic_version ver; 7350aadb33SDmitri Tikhonov uint32_t tag; 7450aadb33SDmitri Tikhonov 7550aadb33SDmitri Tikhonov if (len == sizeof(tag) && 'Q' == str[0]) 7650aadb33SDmitri Tikhonov { 7750aadb33SDmitri Tikhonov memcpy(&tag, str, sizeof(tag)); 7850aadb33SDmitri Tikhonov return lsquic_tag2ver(tag); 7950aadb33SDmitri Tikhonov } 8050aadb33SDmitri Tikhonov 815392f7a3SLiteSpeed Tech for (ver = 0; ver < N_LSQVER; ++ver) 825392f7a3SLiteSpeed Tech if (strlen(lsquic_ver2str[ver]) == len 835392f7a3SLiteSpeed Tech && strncasecmp(lsquic_ver2str[ver], str, len) == 0) 845392f7a3SLiteSpeed Tech { 855392f7a3SLiteSpeed Tech return ver; 865392f7a3SLiteSpeed Tech } 8750aadb33SDmitri Tikhonov 885392f7a3SLiteSpeed Tech return -1; 895392f7a3SLiteSpeed Tech} 9050aadb33SDmitri Tikhonov 9150aadb33SDmitri Tikhonov 925392f7a3SLiteSpeed Techint 935392f7a3SLiteSpeed Techlsquic_gen_ver_tags (unsigned char *buf, size_t bufsz, unsigned version_bitmask) 945392f7a3SLiteSpeed Tech{ 955392f7a3SLiteSpeed Tech unsigned n; 965392f7a3SLiteSpeed Tech lsquic_ver_tag_t tag; 975392f7a3SLiteSpeed Tech unsigned char *p = buf; 985392f7a3SLiteSpeed Tech unsigned char *const pend = p + bufsz; 995392f7a3SLiteSpeed Tech for (n = 0; version_bitmask; ++n) 1005392f7a3SLiteSpeed Tech { 1015392f7a3SLiteSpeed Tech if (version_bitmask & (1 << n)) 1025392f7a3SLiteSpeed Tech { 1035392f7a3SLiteSpeed Tech if (p + 4 > pend) 1045392f7a3SLiteSpeed Tech return -1; 1055392f7a3SLiteSpeed Tech version_bitmask &= ~(1 << n); 1065392f7a3SLiteSpeed Tech tag = lsquic_ver2tag(n); 1075392f7a3SLiteSpeed Tech if (0 == tag) 1085392f7a3SLiteSpeed Tech return -1; 1095392f7a3SLiteSpeed Tech memcpy(p, &tag, 4); 1105392f7a3SLiteSpeed Tech p += 4; 1115392f7a3SLiteSpeed Tech } 1125392f7a3SLiteSpeed Tech } 1135392f7a3SLiteSpeed Tech return p - buf; 1145392f7a3SLiteSpeed Tech} 115