debian: new upstream release
[git/debian.git] / protocol.c
blob052d7edbb9a332c40a4bde7db85bed14564df51c
1 #include "cache.h"
2 #include "config.h"
3 #include "protocol.h"
5 static enum protocol_version parse_protocol_version(const char *value)
7 if (!strcmp(value, "0"))
8 return protocol_v0;
9 else if (!strcmp(value, "1"))
10 return protocol_v1;
11 else if (!strcmp(value, "2"))
12 return protocol_v2;
13 else
14 return protocol_unknown_version;
17 enum protocol_version get_protocol_version_config(void)
19 const char *value;
20 const char *git_test_k = "GIT_TEST_PROTOCOL_VERSION";
21 const char *git_test_v;
23 if (!git_config_get_string_tmp("protocol.version", &value)) {
24 enum protocol_version version = parse_protocol_version(value);
26 if (version == protocol_unknown_version)
27 die("unknown value for config 'protocol.version': %s",
28 value);
30 return version;
33 git_test_v = getenv(git_test_k);
34 if (git_test_v && *git_test_v) {
35 enum protocol_version env = parse_protocol_version(git_test_v);
37 if (env == protocol_unknown_version)
38 die("unknown value for %s: %s", git_test_k, git_test_v);
39 return env;
42 return protocol_v2;
45 enum protocol_version determine_protocol_version_server(void)
47 const char *git_protocol = getenv(GIT_PROTOCOL_ENVIRONMENT);
48 enum protocol_version version = protocol_v0;
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.
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);
62 for_each_string_list_item(item, &list) {
63 const char *value;
64 enum protocol_version v;
66 if (skip_prefix(item->string, "version=", &value)) {
67 v = parse_protocol_version(value);
68 if (v > version)
69 version = v;
73 string_list_clear(&list, 0);
76 return version;
79 enum protocol_version determine_protocol_version_client(const char *server_response)
81 enum protocol_version version = protocol_v0;
83 if (skip_prefix(server_response, "version ", &server_response)) {
84 version = parse_protocol_version(server_response);
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");
92 return version;