1#ifndef PROTOCOL_H 2#define PROTOCOL_H 3 4enum protocol_version { 5 protocol_unknown_version = -1, 6 protocol_v0 =0, 7 protocol_v1 =1, 8}; 9 10/* 11 * Used by a client to determine which protocol version to request be used when 12 * communicating with a server, reflecting the configured value of the 13 * 'protocol.version' config. If unconfigured, a value of 'protocol_v0' is 14 * returned. 15 */ 16externenum protocol_version get_protocol_version_config(void); 17 18/* 19 * Used by a server to determine which protocol version should be used based on 20 * a client's request, communicated via the 'GIT_PROTOCOL' environment variable 21 * by setting appropriate values for the key 'version'. If a client doesn't 22 * request a particular protocol version, a default of 'protocol_v0' will be 23 * used. 24 */ 25externenum protocol_version determine_protocol_version_server(void); 26 27/* 28 * Used by a client to determine which protocol version the server is speaking 29 * based on the server's initial response. 30 */ 31externenum protocol_version determine_protocol_version_client(const char*server_response); 32 33#endif/* PROTOCOL_H */