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373d70ef BW |
1 | #include "cache.h" |
2 | #include "config.h" | |
3 | #include "protocol.h" | |
4 | ||
5 | static enum protocol_version parse_protocol_version(const char *value) | |
6 | { | |
7 | if (!strcmp(value, "0")) | |
8 | return protocol_v0; | |
9 | else if (!strcmp(value, "1")) | |
10 | return protocol_v1; | |
8f6982b4 BW |
11 | else if (!strcmp(value, "2")) |
12 | return protocol_v2; | |
373d70ef BW |
13 | else |
14 | return protocol_unknown_version; | |
15 | } | |
16 | ||
17 | enum protocol_version get_protocol_version_config(void) | |
18 | { | |
19 | const char *value; | |
8cbeba06 | 20 | const char *git_test_k = "GIT_TEST_PROTOCOL_VERSION"; |
33166f3a | 21 | const char *git_test_v; |
8cbeba06 | 22 | |
f1de981e | 23 | if (!git_config_get_string_tmp("protocol.version", &value)) { |
373d70ef BW |
24 | enum protocol_version version = parse_protocol_version(value); |
25 | ||
26 | if (version == protocol_unknown_version) | |
27 | die("unknown value for config 'protocol.version': %s", | |
28 | value); | |
29 | ||
33166f3a | 30 | return version; |
8cbeba06 JT |
31 | } |
32 | ||
33166f3a | 33 | git_test_v = getenv(git_test_k); |
8cbeba06 JT |
34 | if (git_test_v && *git_test_v) { |
35 | enum protocol_version env = parse_protocol_version(git_test_v); | |
36 | ||
37 | if (env == protocol_unknown_version) | |
38 | die("unknown value for %s: %s", git_test_k, git_test_v); | |
33166f3a | 39 | return env; |
373d70ef BW |
40 | } |
41 | ||
eb049759 | 42 | return protocol_v2; |
373d70ef BW |
43 | } |
44 | ||
45 | enum protocol_version determine_protocol_version_server(void) | |
46 | { | |
47 | const char *git_protocol = getenv(GIT_PROTOCOL_ENVIRONMENT); | |
48 | enum protocol_version version = protocol_v0; | |
49 | ||
50 | /* | |
51 | * Determine which protocol version the client has requested. Since | |
52 | * multiple 'version' keys can be sent by the client, indicating that | |
53 | * the client is okay to speak any of them, select the greatest version | |
54 | * that the client has requested. This is due to the assumption that | |
55 | * the most recent protocol version will be the most state-of-the-art. | |
56 | */ | |
57 | if (git_protocol) { | |
58 | struct string_list list = STRING_LIST_INIT_DUP; | |
59 | const struct string_list_item *item; | |
60 | string_list_split(&list, git_protocol, ':', -1); | |
61 | ||
62 | for_each_string_list_item(item, &list) { | |
63 | const char *value; | |
64 | enum protocol_version v; | |
65 | ||
66 | if (skip_prefix(item->string, "version=", &value)) { | |
67 | v = parse_protocol_version(value); | |
68 | if (v > version) | |
69 | version = v; | |
70 | } | |
71 | } | |
72 | ||
73 | string_list_clear(&list, 0); | |
74 | } | |
75 | ||
76 | return version; | |
77 | } | |
78 | ||
79 | enum protocol_version determine_protocol_version_client(const char *server_response) | |
80 | { | |
81 | enum protocol_version version = protocol_v0; | |
82 | ||
83 | if (skip_prefix(server_response, "version ", &server_response)) { | |
84 | version = parse_protocol_version(server_response); | |
85 | ||
86 | if (version == protocol_unknown_version) | |
87 | die("server is speaking an unknown protocol"); | |
88 | if (version == protocol_v0) | |
89 | die("protocol error: server explicitly said version 0"); | |
90 | } | |
91 | ||
92 | return version; | |
93 | } |