69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
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#ifndef HV_PROTO_RPC_H_
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#define HV_PROTO_RPC_H_
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#include <string.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define PROTORPC_NAME "HRPC"
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#define PROTORPC_VERSION 1
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// protocol:4bytes + version:1byte + flags:1byte + reserved:2bytes + length:4bytes = 12bytes
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#define PROTORPC_HEAD_LENGTH 12
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#define PROTORPC_HEAD_LENGTH_FIELD_OFFSET 8
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#define PROTORPC_HEAD_LENGTH_FIELD_BYTES 4
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typedef struct {
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unsigned char protocol[4];
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unsigned char version;
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unsigned char flags;
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unsigned char reserved[2];
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unsigned int length;
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} protorpc_head;
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typedef const char* protorpc_body;
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typedef struct {
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protorpc_head head;
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protorpc_body body;
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} protorpc_message;
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static inline unsigned int protorpc_package_length(const protorpc_head* head) {
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return PROTORPC_HEAD_LENGTH + head->length;
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}
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static inline void protorpc_head_init(protorpc_head* head) {
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// protocol = HRPC
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memcpy(head->protocol, PROTORPC_NAME, 4);
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head->version = PROTORPC_VERSION;
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head->reserved[0] = head->reserved[1] = 0;
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head->length = 0;
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}
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static inline void protorpc_message_init(protorpc_message* msg) {
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protorpc_head_init(&msg->head);
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msg->body = NULL;
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}
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static inline int protorpc_head_check(protorpc_head* head) {
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if (memcmp(head->protocol, PROTORPC_NAME, 4) != 0) {
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return -1;
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}
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if (head->version != PROTORPC_VERSION) {
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return -2;
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}
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return 0;
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}
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// @retval >0 package_length, <0 error
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int protorpc_pack(const protorpc_message* msg, void* buf, int len);
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// @retval >0 package_length, <0 error
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int protorpc_unpack(protorpc_message* msg, const void* buf, int len);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // HV_PROTO_RPC_H_
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