linux 改udp接收缓冲区

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

int main() {
    int sockfd;
    struct sockaddr_in servaddr;
    int recvbufsize = 65536; // 设置接收缓冲区大小为64KB

    if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
        perror("socket creation failed");
        exit(EXIT_FAILURE);
    }

    // 设置接收缓冲区大小
    if (setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, &recvbufsize, sizeof(recvbufsize)) < 0) {
        perror("setsockopt SO_RCVBUF failed");
        close(sockfd);
        exit(EXIT_FAILURE);
    }

    memset(&servaddr, 0, sizeof(servaddr));
    servaddr.sin_family = AF_INET;
    servaddr.sin_addr.s_addr = INADDR_ANY;
    servaddr.sin_port = htons(8080);

    if (bind(sockfd, (const struct sockaddr *)&servaddr, sizeof(servaddr)) < 0) {
        perror("bind failed");
        close(sockfd);
        exit(EXIT_FAILURE);
    }

    // 接收数据的代码...

    close(sockfd);
    return 0;
}