Eighth batch
[git.git] / protocol.c
blob9741f057505d2041be1e8dbd49b444aaeab4bd82
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 enum protocol_version retval = protocol_v0;
21 const char *git_test_k = "GIT_TEST_PROTOCOL_VERSION";
22 const char *git_test_v = getenv(git_test_k);
24 if (!git_config_get_string_const("protocol.version", &value)) {
25 enum protocol_version version = parse_protocol_version(value);
27 if (version == protocol_unknown_version)
28 die("unknown value for config 'protocol.version': %s",
29 value);
31 retval = version;
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 if (retval < env)
40 retval = env;
43 return retval;
46 enum protocol_version determine_protocol_version_server(void)
48 const char *git_protocol = getenv(GIT_PROTOCOL_ENVIRONMENT);
49 enum protocol_version version = protocol_v0;
52 * Determine which protocol version the client has requested. Since
53 * multiple 'version' keys can be sent by the client, indicating that
54 * the client is okay to speak any of them, select the greatest version
55 * that the client has requested. This is due to the assumption that
56 * the most recent protocol version will be the most state-of-the-art.
58 if (git_protocol) {
59 struct string_list list = STRING_LIST_INIT_DUP;
60 const struct string_list_item *item;
61 string_list_split(&list, git_protocol, ':', -1);
63 for_each_string_list_item(item, &list) {
64 const char *value;
65 enum protocol_version v;
67 if (skip_prefix(item->string, "version=", &value)) {
68 v = parse_protocol_version(value);
69 if (v > version)
70 version = v;
74 string_list_clear(&list, 0);
77 return version;
80 enum protocol_version determine_protocol_version_client(const char *server_response)
82 enum protocol_version version = protocol_v0;
84 if (skip_prefix(server_response, "version ", &server_response)) {
85 version = parse_protocol_version(server_response);
87 if (version == protocol_unknown_version)
88 die("server is speaking an unknown protocol");
89 if (version == protocol_v0)
90 die("protocol error: server explicitly said version 0");
93 return version;