#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 return protocol_unknown_version; } enum protocol_version get_protocol_version_config(void) { const char *value; 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; } return protocol_v0; } 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; }