我正在编写一个基于 AX.25 协议的服务器/客户端 c 程序。服务器创建套接字,绑定成功并监听即将到来的连接。客户端在不同的线程中运行,但连接失败并显示“没有到主机的路由”
服务器代码
#include <sys/socket.h>
#include <netax25/ax25.h>
#include <netax25/axlib.h>
#include <netax25/axconfig.h>
#include <stdio.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <syslog.h>
#include <sys/types.h>
#include <linux/socket.h>
#include <stdlib.h>
#include <sys/un.h>
#include <string.h>
#include <errno.h>
int main(int argc,char **argv,char **envp) {
int ax25_socket = -1;
unsigned char buffer[512];
struct full_sockaddr_ax25 addr, axconnect ;
char *port ="3";// sm0 port number:3
char *call = "OH2BNS-8";// sm0 callsign
bzero((char *) &addr, sizeof(struct full_sockaddr_ax25));
addr.fsa_ax25.sax25_family = AF_AX25;
addr.fsa_ax25.sax25_ndigis = 1;
if (ax25_config_load_ports() == 0) {
printf( "Problem with axports file");
//return -1;
}
char* ax25port = (char*) ax25_config_get_addr(port);
ax25_aton_entry( call, addr.fsa_ax25.sax25_call.ax25_call);
ax25_aton_entry( ax25port, addr.fsa_digipeater[0].ax25_call);
ax25_socket = socket(AF_AX25, SOCK_SEQPACKET, 0);
if (ax25_socket < -1)
printf( "error in create socket");
if (bind(ax25_socket, (struct sockaddr *)&addr, sizeof(struct full_sockaddr_ax25)) < 0) {
perror("bind--");
return -1;
}
if(listen(ax25_socket,2) != 0)
{
printf("cannot listen on socket!\n");
close(ax25_socket);
return 0;
}
puts("listening");
//bzero((char *) &axconnect, sizeof(struct full_sockaddr_ax25));
int len =sizeof(struct full_sockaddr_ax25);
int temp_sock_desc = accept(ax25_socket, (struct sockaddr*)&axconnect, &len);
if (temp_sock_desc == -1)
{
printf("cannot accept client!\n");
close(ax25_socket);
return 0;
}
return 0;
}
客户端代码
#include <sys/socket.h>
#include <netax25/ax25.h>
#include <netax25/axlib.h>
#include <netax25/axconfig.h>
#include <stdio.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <syslog.h>
#include <sys/types.h>
#include <linux/socket.h>
#include <stdlib.h>
#include <sys/un.h>
#include <string.h>
#include <errno.h>
int main(int argc, char *argv[])
{
int ax25_socket = -1;
unsigned char buffer[512];
struct full_sockaddr_ax25 axconnect ;
char *port ="3";// sm0 port number:3
char *call ="OH2BNS-8";// sm0 callsign
bzero((char *) &axconnect, sizeof(struct full_sockaddr_ax25));
axconnect.fsa_ax25.sax25_family = AF_AX25;
axconnect.fsa_ax25.sax25_ndigis = 1;
if (ax25_config_load_ports() == 0) {
printf( "Problem with axports file");
//return -1;
}
char* ax25port = (char*) ax25_config_get_addr(port);
ax25_aton_entry( call, axconnect.fsa_ax25.sax25_call.ax25_call);
ax25_aton_entry( ax25port, axconnect.fsa_digipeater[0].ax25_call);
ax25_socket = socket(AF_AX25, SOCK_SEQPACKET, 0);
if (ax25_socket < -1)
printf( "error in create socket");
if (connect(ax25_socket, (struct sockaddr *)&axconnect, sizeof(struct full_sockaddr_ax25)) != 0) {
perror("--");
switch (errno) {
case ECONNREFUSED:
printf("*** Connection refused\r");
break;
case ENETUNREACH:
printf("*** No known route\r");
break;
case EINTR:
printf("*** Connection timed out\r");
break;
default:
printf("ERROR: cannot connect to AX.25 callsign\r");
break;
}
close(ax25_socket);
}
printf("Connected!!\r");
int n = write(ax25_socket,"Message!!!!",18);
if(n = -1)
{
perror("write--");
}
return 0;
}