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 protocol_v2 =2, 9}; 10 11/* 12 * Used by a client to determine which protocol version to request be used when 13 * communicating with a server, reflecting the configured value of the 14 * 'protocol.version' config. If unconfigured, a value of 'protocol_v0' is 15 * returned. 16 */ 17enum protocol_version get_protocol_version_config(void); 18 19/* 20 * Used by a server to determine which protocol version should be used based on 21 * a client's request, communicated via the 'GIT_PROTOCOL' environment variable 22 * by setting appropriate values for the key 'version'. If a client doesn't 23 * request a particular protocol version, a default of 'protocol_v0' will be 24 * used. 25 */ 26enum protocol_version determine_protocol_version_server(void); 27 28/* 29 * Used by a client to determine which protocol version the server is speaking 30 * based on the server's initial response. 31 */ 32enum protocol_version determine_protocol_version_client(const char*server_response); 33 34#endif/* PROTOCOL_H */