测试setsockopt设置超时是否生效代码
简介:
// 测试setsockopt设置超时是否生效代码
#include arpa/inet.h>
#include netinet/in.
- // 测试setsockopt设置超时是否生效代码
- #include arpa/inet.h>
- #include netinet/in.h>
- #include stdlib.h>
- #include stdio.h>
- #include string.h>
- #include sys/socket.h>
- #include sys/types.h>
- #include unistd.h>
-
- // 编译:
- // g++ -g -o x x.cpp
- int main()
- {
- // 创建一个客户端TCP socket
- int fd = socket(PF_INET, SOCK_STREAM, 0);
- if (-1 == 0)
- {
- perror("socket");
- exit(1);
- }
-
- // 设定目标地址
- struct sockaddr_in addr;
- addr.sin_family = AF_INET;
- addr.sin_port = htons(9090); // 确保这个端口是打开的
- addr.sin_addr.s_addr = inet_addr("127.0.0.1");
- memset(addr.sin_zero, 0, sizeof(addr.sin_zero));
- int ret = connect(fd, (const struct sockaddr *)&addr, sizeof(addr));
- if (ret != 0)
- {
- perror("connect");
- exit(1);
- }
-
- // 设置recv超时
- struct timeval timeout;
- timeout.tv_sec = 6; // 设定6秒超时
- timeout.tv_usec = 0;
- ret = setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(timeout));
- if (ret != 0)
- {
- perror("setsockopt");
- exit(1);
- }
-
- // 调用recv,期望预期的时间内超时
- char buf[4096];
- //ret = recv(fd, buf, sizeof(buf), 0);
- ret = read(fd, buf, sizeof(buf));
- printf("%d: %m\n", ret); // 期待结果:-1: Resource temporarily unavailable
-
- close(fd);
- return 0;
- }