pocketbus.h

Go to the documentation of this file.
00001 
00043 #ifndef NET_POCKETBUS_H
00044 #define NET_POCKETBUS_H
00045 
00046 #include "cfg/cfg_pocketbus.h"        /* for CONFIG_POCKETBUS_BUFLEN */
00047 #include <cfg/compiler.h>
00048 
00049 #include <algo/rotating_hash.h>
00050 
00051 #include <kern/kfile.h>
00052 
00057 #define POCKETBUS_STX 0x02 //ASCII STX
00058 #define POCKETBUS_ETX 0x03 //ASCII ETX
00059 #define POCKETBUS_ESC 0x1B //ASCII ESC
00060 #define POCKETBUS_ACK 0x06 //ASCII ACK
00061 #define POCKETBUS_NAK 0x15 //ASCII NAK
00062 /*\}*/
00063 
00064 #define POCKETBUS_BROADCAST_ADDR 0xFFFF 
00065 
00066 
00069 typedef uint16_t pocketbus_len_t;
00070 
00074 typedef uint16_t pocketbus_addr_t;
00075 
00079 typedef struct PocketBusHdr
00080 {
00081     #define POCKETBUS_VER 1
00082     uint8_t ver;   
00083     pocketbus_addr_t addr; 
00084 } PocketBusHdr;
00085 
00089 typedef struct PocketBusCtx
00090 {
00091     uint8_t buf[CONFIG_POCKETBUS_BUFLEN]; 
00092     struct KFile *fd;   
00093     bool sync;           
00094     bool escape;         
00095     rotating_t in_cks;   
00096     rotating_t out_cks;  
00097     pocketbus_len_t len; 
00098 } PocketBusCtx;
00099 
00100 STATIC_ASSERT(offsetof(PocketBusCtx, buf) == 0);
00104 typedef struct PocketMsg
00105 {
00106     struct PocketBusCtx *ctx; 
00107     pocketbus_addr_t addr;    
00108     pocketbus_len_t len;      
00109     const uint8_t *payload;   
00110 } PocketMsg;
00111 
00117 STATIC_ASSERT(sizeof(pocketbus_addr_t) == sizeof(uint16_t));
00118 STATIC_ASSERT(sizeof(rotating_t) == sizeof(uint16_t));
00119 /*\}*/
00120 
00121 void pocketbus_putchar(struct PocketBusCtx *ctx, uint8_t c);
00122 void pocketbus_begin(struct PocketBusCtx *ctx, pocketbus_addr_t addr);
00123 void pocketbus_write(struct PocketBusCtx *ctx, const void *_data, size_t len);
00124 void pocketbus_end(struct PocketBusCtx *ctx);
00125 
00126 void pocketbus_send(struct PocketBusCtx *ctx, pocketbus_addr_t addr, const void *data, size_t len);
00127 bool pocketbus_recv(struct PocketBusCtx *ctx, struct PocketMsg *msg);
00128 void pocketbus_init(struct PocketBusCtx *ctx, struct KFile *fd);
00129 
00130 #endif /* NET_POCKETBUS_H */