| #include "cache.h" |
| #include "config.h" |
| #include "protocol.h" |
| |
| static enum protocol_version parse_protocol_version(const char *value) |
| { |
| if (!strcmp(value, "0")) |
| return protocol_v0; |
| else if (!strcmp(value, "1")) |
| return protocol_v1; |
| else if (!strcmp(value, "2")) |
| return protocol_v2; |
| else |
| return protocol_unknown_version; |
| } |
| |
| enum protocol_version get_protocol_version_config(void) |
| { |
| const char *value; |
| const char *git_test_k = "GIT_TEST_PROTOCOL_VERSION"; |
| const char *git_test_v; |
| |
| if (!git_config_get_string_const("protocol.version", &value)) { |
| enum protocol_version version = parse_protocol_version(value); |
| |
| if (version == protocol_unknown_version) |
| die("unknown value for config 'protocol.version': %s", |
| value); |
| |
| return version; |
| } |
| |
| git_test_v = getenv(git_test_k); |
| if (git_test_v && *git_test_v) { |
| enum protocol_version env = parse_protocol_version(git_test_v); |
| |
| if (env == protocol_unknown_version) |
| die("unknown value for %s: %s", git_test_k, git_test_v); |
| return env; |
| } |
| |
| return protocol_v2; |
| } |
| |
| enum protocol_version determine_protocol_version_server(void) |
| { |
| const char *git_protocol = getenv(GIT_PROTOCOL_ENVIRONMENT); |
| enum protocol_version version = protocol_v0; |
| |
| /* |
| * Determine which protocol version the client has requested. Since |
| * multiple 'version' keys can be sent by the client, indicating that |
| * the client is okay to speak any of them, select the greatest version |
| * that the client has requested. This is due to the assumption that |
| * the most recent protocol version will be the most state-of-the-art. |
| */ |
| if (git_protocol) { |
| struct string_list list = STRING_LIST_INIT_DUP; |
| const struct string_list_item *item; |
| string_list_split(&list, git_protocol, ':', -1); |
| |
| for_each_string_list_item(item, &list) { |
| const char *value; |
| enum protocol_version v; |
| |
| if (skip_prefix(item->string, "version=", &value)) { |
| v = parse_protocol_version(value); |
| if (v > version) |
| version = v; |
| } |
| } |
| |
| string_list_clear(&list, 0); |
| } |
| |
| return version; |
| } |
| |
| enum protocol_version determine_protocol_version_client(const char *server_response) |
| { |
| enum protocol_version version = protocol_v0; |
| |
| if (skip_prefix(server_response, "version ", &server_response)) { |
| version = parse_protocol_version(server_response); |
| |
| if (version == protocol_unknown_version) |
| die("server is speaking an unknown protocol"); |
| if (version == protocol_v0) |
| die("protocol error: server explicitly said version 0"); |
| } |
| |
| return version; |
| } |