linux send超时时间

ssize_t send(int sockfd, const void *buf, size_t len, int flags);

#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>

int main() {
    int sockfd;
    struct sockaddr_in serv_addr;
    char buffer[] = "Hello, Server!";
    int timeout = 5000; // 5 seconds

    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd < 0) {
        perror("Error opening socket");
        return 1;
    }

    memset(&serv_addr, 0, sizeof(serv_addr));
    serv_addr.sin_family = AF_INET;
    serv_addr.sin_port = htons(8080);
    inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr);

    if (connect(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
        perror("Connection failed");
        close(sockfd);
        return 1;
    }

    struct timeval tv;
    tv.tv_sec = timeout / 1000;
    tv.tv_usec = (timeout % 1000) * 1000;
    setsockopt(sockfd, SOL_SOCKET, SO_SNDTIMEO, (const char*)&tv, sizeof(tv));

    ssize_t bytes_sent = send(sockfd, buffer, strlen(buffer), 0);
    if (bytes_sent < 0) {
        perror("Send failed");
    } else {
        printf("Bytes sent: %zd\n", bytes_sent);
    }

    close(sockfd);
    return 0;
}