how to check CAN frame

1. check buffer size

getsockopt(s, SOL_SOCKET, SO_SNDBUF,&snd_size, &optlen);

setsockopt(s, SOL_SOCKET, SO_SNDBUF,&snd_size, &optlen);

setsockopt(s,SOL_SOCKET,SO_RCVBUF, (char *)&rcv_size, optlen);

//RE:https://blog.csdn.net/fuyuehua22/article/details/38232769
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <assert.h> 

int main(int argc,char **argv)
{
int err = -; /* 返回值 */
int s = -; /* socket描述符 */
int snd_size = ; /* 发送缓冲区大小 */
int rcv_size = ; /* 接收缓冲区大小 */
socklen_t optlen; /* 选项值长度 */ 

/*建立一个TCP套接字 */
s = socket(PF_INET,SOCK_STREAM,);
if( s == -){
printf("建立套接字错误\n");
return -;
} 

/* 先读取缓冲区设置的情况,获得原始发送缓冲区大小*/
optlen = sizeof(snd_size);
err = getsockopt(s, SOL_SOCKET, SO_SNDBUF,&snd_size, &optlen);
if(err<){
printf("获取发送缓冲区大小错误\n");
}
/*打印原始缓冲区设置情况*/ 

/*获得原始接收缓冲区大小*/
optlen = sizeof(rcv_size);
err = getsockopt(s, SOL_SOCKET, SO_RCVBUF, &rcv_size, &optlen);
if(err<){
printf("获取接收缓冲区大小错误\n");
} 

printf(" 发送缓冲区原始大小为: %d 字节\n",snd_size);
printf(" 接收缓冲区原始大小为: %d 字节\n",rcv_size); 

/*设置发送缓冲区大小*/
snd_size = *; /* 发送缓冲区大小为8K */
optlen = sizeof(snd_size);
err = setsockopt(s, SOL_SOCKET, SO_SNDBUF, &snd_size, optlen);
if(err<){
printf("设置发送缓冲区大小错误\n");
} 

/*设置接收缓冲区大小*/
rcv_size = *; /* 接收缓冲区大小为8K */
optlen = sizeof(rcv_size);
err = setsockopt(s,SOL_SOCKET,SO_RCVBUF, (char *)&rcv_size, optlen);
if(err<){
printf("设置接收缓冲区大小错误\n");
} 

/*检查上述缓冲区设置的情况,获得修改后发送缓冲区大小 */
optlen = sizeof(snd_size);
err = getsockopt(s, SOL_SOCKET, SO_SNDBUF,&snd_size, &optlen);
if(err<){
printf("获取发送缓冲区大小错误\n");
} 

/*获得修改后接收缓冲区大小 */
optlen = sizeof(rcv_size);
err = getsockopt(s, SOL_SOCKET, SO_RCVBUF,(char *)&rcv_size, &optlen);
if(err<){
printf("获取接收缓冲区大小错误\n");
} 

/* 打印结果 */
printf(" 发送缓冲区大小为: %d 字节\n",snd_size);
printf(" 接收缓冲区大小为: %d 字节\n",rcv_size); 

close(s);
return ;
} 

2. 查看统计：

cat /proc/net/can/stats

eg:

nvidia@tegra-ubuntu:~/zrj/laneseg_TRT$ cat /proc/net/can/stats 

    transmitted frames (TXF)
    received frames (RXF)
         matched frames (RXMF)

         % total match ratio (RXMR)
         frames/s total tx rate (TXR)
         frames/s total rx rate (RXR)

         % current match ratio (CRXMR)
       frames/s current tx rate (CTXR)
       frames/s current rx rate (CRXR)

         % max match ratio (MRXMR)
       frames/s max tx rate (MTXR)
      frames/s max rx rate (MRXR)

         current receive list entries (CRCV)
         maximum receive list entries (MRCV)

3. ifconfig can1

nvidia@tegra-ubuntu:~/zrj/laneseg_TRT$ ifconfig can1
can1      Link encap:UNSPEC  HWaddr ---------------
          UP RUNNING NOARP  MTU:  Metric:
          RX packets: errors: dropped: overruns: frame:
          TX packets: errors: dropped: overruns: carrier:
          collisions: txqueuelen:
          RX bytes: (589.8 KB)  TX bytes: (2.0 MB)
          Interrupt: 

4. other tools.

CANoe or CANPro etc...

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