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-rw-r--r--protocol.h33
1 files changed, 33 insertions, 0 deletions
diff --git a/protocol.h b/protocol.h
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+#ifndef PROTOCOL_H
+#define PROTOCOL_H
+
+enum protocol_version {
+ protocol_unknown_version = -1,
+ protocol_v0 = 0,
+ protocol_v1 = 1,
+};
+
+/*
+ * Used by a client to determine which protocol version to request be used when
+ * communicating with a server, reflecting the configured value of the
+ * 'protocol.version' config. If unconfigured, a value of 'protocol_v0' is
+ * returned.
+ */
+extern enum protocol_version get_protocol_version_config(void);
+
+/*
+ * Used by a server to determine which protocol version should be used based on
+ * a client's request, communicated via the 'GIT_PROTOCOL' environment variable
+ * by setting appropriate values for the key 'version'. If a client doesn't
+ * request a particular protocol version, a default of 'protocol_v0' will be
+ * used.
+ */
+extern enum protocol_version determine_protocol_version_server(void);
+
+/*
+ * Used by a client to determine which protocol version the server is speaking
+ * based on the server's initial response.
+ */
+extern enum protocol_version determine_protocol_version_client(const char *server_response);
+
+#endif /* PROTOCOL_H */