lsquic_version.c revision c7d81ce1 
1/* Copyright (c) 2017 - 2019 LiteSpeed Technologies Inc.  See LICENSE. */
2#include <string.h>
3
4#include "lsquic.h"
5#include "lsquic_int_types.h"
6#include "lsquic_version.h"
7
8
9static const unsigned char version_tags[N_LSQVER][4] =
10{
11    [LSQVER_035] = { 'Q', '0', '3', '5', },
12    [LSQVER_039] = { 'Q', '0', '3', '9', },
13    [LSQVER_043] = { 'Q', '0', '4', '3', },
14    [LSQVER_044] = { 'Q', '0', '4', '4', },
15    [LSQVER_046] = { 'Q', '0', '4', '6', },
16#if LSQUIC_USE_Q098
17    [LSQVER_098] = { 'Q', '0', '9', '8', },
18#endif
19};
20
21
22uint32_t
23lsquic_ver2tag (unsigned version)
24{
25    lsquic_ver_tag_t tag;
26    if (version < N_LSQVER)
27    {
28        memcpy(&tag, version_tags[version], 4);
29        return tag;
30    }
31    else
32        return 0;
33}
34
35
36enum lsquic_version
37lsquic_tag2ver (uint32_t ver_tag)
38{
39    unsigned n;
40    for (n = 0; n < sizeof(version_tags) / sizeof(version_tags[0]); ++n)
41        if (0 == memcmp(version_tags[n], &ver_tag, sizeof(ver_tag)))
42            return n;
43    return -1;
44}
45
46
47enum lsquic_version
48lsquic_str2ver (const char *str, size_t len)
49{
50    uint32_t tag;
51
52    if (len == sizeof(tag) && 'Q' == str[0])
53    {
54        memcpy(&tag, str, sizeof(tag));
55        return lsquic_tag2ver(tag);
56    }
57    else
58        return -1;
59}
60
61
62const char *const lsquic_ver2str[N_LSQVER] = {
63    [LSQVER_035] = "Q035",
64    [LSQVER_039] = "Q039",
65    [LSQVER_043] = "Q043",
66    [LSQVER_044] = "Q044",
67    [LSQVER_046] = "Q046",
68#if LSQUIC_USE_Q098
69    [LSQVER_098] = "Q098",
70#endif
71};
72
73
74