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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; | |
11 | else | |
12 | return protocol_unknown_version; | |
13 | } | |
14 | ||
15 | enum protocol_version get_protocol_version_config(void) | |
16 | { | |
17 | const char *value; | |
18 | if (!git_config_get_string_const("protocol.version", &value)) { | |
19 | enum protocol_version version = parse_protocol_version(value); | |
20 | ||
21 | if (version == protocol_unknown_version) | |
22 | die("unknown value for config 'protocol.version': %s", | |
23 | value); | |
24 | ||
25 | return version; | |
26 | } | |
27 | ||
28 | return protocol_v0; | |
29 | } | |
30 | ||
31 | enum protocol_version determine_protocol_version_server(void) | |
32 | { | |
33 | const char *git_protocol = getenv(GIT_PROTOCOL_ENVIRONMENT); | |
34 | enum protocol_version version = protocol_v0; | |
35 | ||
36 | /* | |
37 | * Determine which protocol version the client has requested. Since | |
38 | * multiple 'version' keys can be sent by the client, indicating that | |
39 | * the client is okay to speak any of them, select the greatest version | |
40 | * that the client has requested. This is due to the assumption that | |
41 | * the most recent protocol version will be the most state-of-the-art. | |
42 | */ | |
43 | if (git_protocol) { | |
44 | struct string_list list = STRING_LIST_INIT_DUP; | |
45 | const struct string_list_item *item; | |
46 | string_list_split(&list, git_protocol, ':', -1); | |
47 | ||
48 | for_each_string_list_item(item, &list) { | |
49 | const char *value; | |
50 | enum protocol_version v; | |
51 | ||
52 | if (skip_prefix(item->string, "version=", &value)) { | |
53 | v = parse_protocol_version(value); | |
54 | if (v > version) | |
55 | version = v; | |
56 | } | |
57 | } | |
58 | ||
59 | string_list_clear(&list, 0); | |
60 | } | |
61 | ||
62 | return version; | |
63 | } | |
64 | ||
65 | enum protocol_version determine_protocol_version_client(const char *server_response) | |
66 | { | |
67 | enum protocol_version version = protocol_v0; | |
68 | ||
69 | if (skip_prefix(server_response, "version ", &server_response)) { | |
70 | version = parse_protocol_version(server_response); | |
71 | ||
72 | if (version == protocol_unknown_version) | |
73 | die("server is speaking an unknown protocol"); | |
74 | if (version == protocol_v0) | |
75 | die("protocol error: server explicitly said version 0"); | |
76 | } | |
77 | ||
78 | return version; | |
79 | } |