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rbcp.c
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/*
*
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/time.h>
#include "rbcp.h"
static struct sockaddr_in destsockaddr;
static int sequence = 0;
int rbcp_open(char *hostname, int port)
{
//struct sockaddr_in destsockaddr;
struct addrinfo hints, *ai;
int sock;
int status;
struct timeval timeout={3, 0};
memset((char *)&hints, 0, sizeof(hints));
hints.ai_family = AF_INET;
status = getaddrinfo(hostname, NULL, &hints, &ai);
if (status != 0) {
fprintf(stderr, "Unknown host %s (%s)\n",
hostname, gai_strerror(status));
perror("rbcp_open");
return -1;
}
memset((char *)&destsockaddr, 0, sizeof(destsockaddr));
memcpy(&destsockaddr, ai->ai_addr, ai->ai_addrlen);
//destsockaddr.sin_addr.s_addr = ai.ai_addr.sin_addr.s_addr;
//destsockaddr.sin_addr.s_addr = inet_addr(dest);
destsockaddr.sin_port = htons(port);
destsockaddr.sin_family = AF_INET;
freeaddrinfo(ai);
sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0) {
perror("rbcp_open socket");
return -1;
}
setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO,
(char *)&timeout, sizeof(struct timeval));
status = connect(sock,
(struct sockaddr *)&destsockaddr, sizeof(destsockaddr));
if (status != 0) {
perror("rbcp_open connect");
close(sock);
return -1;
}
return sock;
}
int rbcp_send(int sock, char *buf, int len)
{
int status;
status = sendto(sock, buf, len, 0,
(struct sockaddr *)&destsockaddr, sizeof(destsockaddr));
if (status != len) {
perror("rbcp_send sendto");
return -1;
}
return 0;
}
int rbcp_receive(int sock, char *buf)
{
int status;
//socklen_t fromlen;
//status = *len = recvfrom(sock, buf, 1024, 0, NULL, &fromlen);
status = recvfrom(sock, buf, 2048, 0, NULL, NULL);
if (status < 0) {
perror("rbcp_receive recvfrom (Timeout ?)");
return -1;
}
return status;
}
int rbcp_close(int sock)
{
return close(sock);
}
int updreg_wait_ans(int sock)
{
return 0;
}
int rbcp_read(int sock, char *buf, unsigned int addr, int len)
{
struct bcp_header bcp;
struct rbcp_header *rbcp;
char *data;
int status;
int rlen = 0;
bcp.type = RBCP_VER;
bcp.command = RBCP_CMD_RD;
bcp.address = htonl(addr);
bcp.length = len;
bcp.id = sequence++;
status = rbcp_send(sock, (char *)&bcp, sizeof(bcp));
if (status < 0) printf("rbcp_read udp_send: error\n");
//fprintf(stderr, "#D send\n");
rlen = rbcp_receive(sock, buf);
//fprintf(stderr, "#D receive %d\n", rlen);
rbcp = (struct rbcp_header *)buf;
data = buf + sizeof(struct rbcp_header);
#ifdef DEBUG
if (rlen > 0) {
int i;
printf("type: 0x%x, command: 0x%x, id: 0x%x, length: %d, address: %d",
rbcp->type & 0xff, rbcp->command& 0xff,
rbcp->id & 0xff, rbcp->length & 0xff,
ntohl(rbcp->address & 0xffffffff));
for (i = 0 ; i < (int)(rlen - sizeof(struct rbcp_header)) ; i++) {
if ((i % 8) == 0) printf("\n%04x: ", addr + i);
printf("%02x ", data[i] & 0xff);
}
printf("\n");
}
#endif
if (rlen > (int)(sizeof(struct rbcp_header))) {
//printf("#D rlen %d %d \n", rlen, sizeof(struct rbcp_header));
memmove(buf, data, rlen - sizeof(struct rbcp_header));
} else {
fprintf(stderr, "rbcp_read: RBCP Read err.\n");
}
return rlen;
}
int rbcp_write(int sock, char *data, unsigned int addr, int len)
{
struct bcp_header *bcp;
struct rbcp_header *rbcp;
char *bcp_body;
static char sbuf[2048];
static char rbuf[2048];
int status;
int rlen = 0;
bcp = (struct bcp_header *)sbuf;
bcp_body = sbuf + sizeof(struct bcp_header);
bcp->type = RBCP_VER;
bcp->command = RBCP_CMD_WR;
bcp->address = htonl(addr);
//bcp->length = len + sizeof(struct bcp_header);
bcp->length = len;
bcp->id = sequence++;
if (len < 2048 - sizeof(struct bcp_header)) {
memcpy(bcp_body, data, len);
} else {
fprintf(stderr, "rbcp_write: Buffer overflow %d\n", len);
return -1;
}
status = rbcp_send(sock, (char *)&sbuf, sizeof(struct bcp_header) + len);
if (status < 0) printf("rbcp_write udp_send: error\n");
//fprintf(stderr, "#D send\n");
rlen = rbcp_receive(sock, rbuf);
//fprintf(stderr, "#D receive %d\n", rlen);
rbcp = (struct rbcp_header *)rbuf;
data = rbuf + sizeof(struct rbcp_header);
#ifdef DEBUG
if (rlen > 0) {
int i;
printf("type: 0x%x, command: 0x%x, id: 0x%x, length: %d, address: %d",
rbcp->type & 0xff, rbcp->command& 0xff,
rbcp->id & 0xff, rbcp->length & 0xff,
ntohl(rbcp->address & 0xffffffff));
for (i = 0 ; i < (int)(rlen - sizeof(struct rbcp_header)) ; i++) {
if ((i % 8) == 0) printf("\n%04x: ", addr + i);
printf("%02x ", data[i] & 0xff);
}
printf("\n");
}
#endif
return rlen;
}
#ifdef TEST_MAIN
static char *default_host = "192.168.10.16";
static int default_port = 4660;
static int seq1 = 0;
void helpline(char *cname)
{
printf("%s <Commads>\n", cname);
printf("Commands \n");
printf("--host=<hotname>\n");
printf("--port=<port nmber>\n");
printf("--read=<address>:<number of reading>\n");
printf("--write=<addres>:<data>\n");
return;
}
int main(int argc, char* argv[])
{
int sock;
//struct bcp_header bcp;
static char buf[1024];
//int rlen;
char hostname[256];
int port;
unsigned int raddress, rlen;
unsigned int waddress;
int wdata;
int status;
int i;
strcpy(hostname, default_host);
port = default_port;
wdata = -1;
rlen = 0;
for (i = 1 ; i < argc ; i++) {
if (sscanf(argv[i], "--host=%s", hostname) == 1) ;
if (sscanf(argv[i], "--port=%d", &port) == 1) ;
if (sscanf(argv[i], "--read=%x:%x", &raddress, &rlen) == 1);
if (sscanf(argv[i], "--write=%x:%x", &waddress, &wdata) == 1);
if (strncmp(argv[i], "--seq1", 6) == 0) seq1 = 1;
}
printf("host: %s\n", hostname);
sock = rbcp_open(hostname, port);
if (rlen > 0) {
printf("read: 0x%x : %d\n", raddress, rlen);
rbcp_read(sock, buf, raddress, rlen);
}
if (wdata >= 0) {
printf("write: 0x%x : %x\n", waddress, wdata);
buf[0] = wdata & 0xff;
buf[1] = 0;
status = rbcp_write(sock, buf, waddress, 1);
if (status <= 0) printf("Write Error %d\n", status);
}
if (seq1 == 1) {
int j;
for (j = 0 ; j < 128 ; j++) {
for (i = 0 ; i < 128 ; i++) buf[i] = i;
buf[0] = j;
rbcp_write(sock, buf, 0 + 128*j, 128);
}
}
rbcp_close(sock);
return 0;
}
#endif