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);
#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 = -1; /* 返回值 */
int s = -1; /* socket描述符 */
int snd_size = 0; /* 发送缓冲区大小 */
int rcv_size = 0; /* 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,0);
if( s == -1){
printf("建立套接字错误\n");
return -1;
}
/* 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<0){
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<0){
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 = 10*1024; /* 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<0){
printf("设置发送缓冲区大小错误\n");
}
/*设置接收缓冲区大小*/
rcv_size = 10*1024; /* 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<0){
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<0){
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<0){
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 0;
}
View Code
2. 查看统计：
cat /proc/net/can/stats
eg:
nvidia@tegra-ubuntu:~/zrj/laneseg_TRT$ cat /proc/net/can/stats
503740 transmitted frames (TXF)
661826 received frames (RXF)
0 matched frames (RXMF)
0 % total match ratio (RXMR)
0 frames/s total tx rate (TXR)
0 frames/s total rx rate (RXR)
0 % current match ratio (CRXMR)
351 frames/s current tx rate (CTXR)
351 frames/s current rx rate (CRXR)
0 % max match ratio (MRXMR)
408 frames/s max tx rate (MTXR)
3061 frames/s max rx rate (MRXR)
0 current receive list entries (CRCV)
0
3. ifconfig can1
nvidia@tegra-ubuntu:~/zrj/laneseg_TRT$ ifconfig can1
can1 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
UP RUNNING NOARP MTU:72 Metric:1
RX packets:81647 errors:31020 dropped:0 overruns:0 frame:1262
TX packets:250985 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:10
RX bytes:589825 (589.8 KB) TX bytes:2007880 (2.0 MB)
Interrupt:172
4. other tools.
CANoe or CANPro etc...
END
