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Copy pathtestmmsg.c
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81 lines (68 loc) · 1.74 KB
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#define _GNU_SOURCE
#include <netinet/ip.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <sys/syscall.h>
#include <linux/net.h>
int
main(void)
{
int sockfd;
struct sockaddr_in sa[2];
struct mmsghdr msg[2];
struct iovec msg1[2], msg2;
int retval;
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd == -1) {
perror("socket()");
exit(EXIT_FAILURE);
}
sa[0].sin_family = AF_INET;
sa[0].sin_addr.s_addr = htonl(INADDR_LOOPBACK);
sa[0].sin_port = htons(1234);
sa[1].sin_family = AF_INET;
sa[1].sin_addr.s_addr = htonl(INADDR_LOOPBACK);
sa[1].sin_port = htons(4321);
#if 0
if (connect(sockfd, (struct sockaddr *) &sa, sizeof(sa)) == -1) {
perror("connect()");
exit(EXIT_FAILURE);
}
#endif
memset(msg1, 0, sizeof(msg1));
msg1[0].iov_base = "one";
msg1[0].iov_len = 3;
msg1[1].iov_base = "two";
msg1[1].iov_len = 3;
memset(&msg2, 0, sizeof(msg2));
msg2.iov_base = "three";
msg2.iov_len = 5;
memset(msg, 0, sizeof(msg));
msg[0].msg_hdr.msg_name = &sa[0];
msg[0].msg_hdr.msg_namelen = sizeof(struct sockaddr_in);
msg[0].msg_hdr.msg_iov = msg1;
msg[0].msg_hdr.msg_iovlen = 2;
msg[1].msg_hdr.msg_name = &sa[1];
msg[1].msg_hdr.msg_namelen = sizeof(struct sockaddr_in);
msg[1].msg_hdr.msg_iov = &msg2;
msg[1].msg_hdr.msg_iovlen = 1;
#if 1
//retval = syscall(SYS_SENDMMSG, sockfd, msg, 2, 0);
retval = syscall(__NR_sendmmsg, sockfd, msg, 2, 0);
if (retval == -1)
perror("sendmmsg()");
else
printf("%d messages sent\n", retval);
#else
retval = sendmsg(sockfd, &msg[0].msg_hdr, 0);
if (retval == -1)
perror("sendmsg()");
else
printf("%d messages sent\n", retval);
#endif
exit(0);
}