1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/*
* Copyright (C) 2013-2021 Canonical, Ltd.
* Copyright (C) 2022-2026 Colin Ian King
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#define _GNU_SOURCE
#include <unistd.h>
#include <netinet/ip.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
int main(void)
{
int sockfd, ret;
struct sockaddr_in addr;
struct mmsghdr msg_hdr[2];
struct iovec msg_iov1[2], msg_iov2[3];
(void)memset(&addr, 0, sizeof(addr));
(void)memset(&msg_iov1, 0, sizeof(msg_iov1));
(void)memset(&msg_iov2, 0, sizeof(msg_iov2));
(void)memset(&msg_hdr, 0, sizeof(msg_hdr));
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd < 0)
return 1;
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
addr.sin_port = htons(9999);
if (connect(sockfd, (struct sockaddr *) &addr, sizeof(addr)) == -1) {
(void)close(sockfd);
return 1;
}
msg_iov1[0].iov_base = "1";
msg_iov1[0].iov_len = 1;
msg_iov1[1].iov_base = "2";
msg_iov1[1].iov_len = 1;
msg_iov2[0].iov_base = "3";
msg_iov2[0].iov_len = 1;
msg_iov2[1].iov_base = "4";
msg_iov2[1].iov_len = 1;
msg_iov2[2].iov_base = "5";
msg_iov2[2].iov_len = 1;
msg_hdr[0].msg_hdr.msg_iov = msg_iov1;
msg_hdr[0].msg_hdr.msg_iovlen = 2;
msg_hdr[1].msg_hdr.msg_iov = msg_iov2;
msg_hdr[1].msg_hdr.msg_iovlen = 3;
ret = sendmmsg(sockfd, msg_hdr, 2, 0);
(void)close(sockfd);
return ret;
}
|
