Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/ssh/lib/../monitor_fdpass.c	Lines:	0	66	0.0 %
Date:	2017-11-13	Branches:	0	24	0.0 %


/* $OpenBSD: monitor_fdpass.c,v 1.21 2016/02/29 20:22:36 jca Exp $ */
/*
 * Copyright 2001 Niels Provos <provos@citi.umich.edu>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/uio.h>

#include <errno.h>
#include <poll.h>
#include <string.h>
#include <stdarg.h>

#include "log.h"
#include "monitor_fdpass.h"

int
mm_send_fd(int sock, int fd)
{
	struct msghdr msg;
	union {
		struct cmsghdr hdr;
		char buf[CMSG_SPACE(sizeof(int))];
	} cmsgbuf;
	struct cmsghdr *cmsg;
	struct iovec vec;
	char ch = '\0';
	ssize_t n;
	struct pollfd pfd;

	memset(&msg, 0, sizeof(msg));
	memset(&cmsgbuf, 0, sizeof(cmsgbuf));
	msg.msg_control = (caddr_t)&cmsgbuf.buf;
	msg.msg_controllen = sizeof(cmsgbuf.buf);
	cmsg = CMSG_FIRSTHDR(&msg);
	cmsg->cmsg_len = CMSG_LEN(sizeof(int));
	cmsg->cmsg_level = SOL_SOCKET;
	cmsg->cmsg_type = SCM_RIGHTS;
	*(int *)CMSG_DATA(cmsg) = fd;

	vec.iov_base = &ch;
	vec.iov_len = 1;
	msg.msg_iov = &vec;
	msg.msg_iovlen = 1;

	pfd.fd = sock;
	pfd.events = POLLOUT;
	while ((n = sendmsg(sock, &msg, 0)) == -1 &&
	    (errno == EAGAIN || errno == EINTR)) {
		debug3("%s: sendmsg(%d): %s", __func__, fd, strerror(errno));
		(void)poll(&pfd, 1, -1);
	}
	if (n == -1) {
		error("%s: sendmsg(%d): %s", __func__, fd,
		    strerror(errno));
		return -1;
	}

	if (n != 1) {
		error("%s: sendmsg: expected sent 1 got %zd", __func__, n);
		return -1;
	}
	return 0;
}

int
mm_receive_fd(int sock)
{
	struct msghdr msg;
	union {
		struct cmsghdr hdr;
		char buf[CMSG_SPACE(sizeof(int))];
	} cmsgbuf;
	struct cmsghdr *cmsg;
	struct iovec vec;
	ssize_t n;
	char ch;
	int fd;
	struct pollfd pfd;

	memset(&msg, 0, sizeof(msg));
	memset(&cmsgbuf, 0, sizeof(cmsgbuf));
	vec.iov_base = &ch;
	vec.iov_len = 1;
	msg.msg_iov = &vec;
	msg.msg_iovlen = 1;
	msg.msg_control = &cmsgbuf.buf;
	msg.msg_controllen = sizeof(cmsgbuf.buf);

	pfd.fd = sock;
	pfd.events = POLLIN;
	while ((n = recvmsg(sock, &msg, 0)) == -1 &&
	    (errno == EAGAIN || errno == EINTR)) {
		debug3("%s: recvmsg: %s", __func__, strerror(errno));
		(void)poll(&pfd, 1, -1);
	}
	if (n == -1) {
		error("%s: recvmsg: %s", __func__, strerror(errno));
		return -1;
	}

	if (n != 1) {
		error("%s: recvmsg: expected received 1 got %zd", __func__, n);
		return -1;
	}

	cmsg = CMSG_FIRSTHDR(&msg);
	if (cmsg == NULL) {
		error("%s: no message header", __func__);
		return -1;
	}

	if (cmsg->cmsg_type != SCM_RIGHTS) {
		error("%s: expected type %d got %d", __func__,
		    SCM_RIGHTS, cmsg->cmsg_type);
		return -1;
	}
	fd = (*(int *)CMSG_DATA(cmsg));
	return fd;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: monitor_fdpass.c,v 1.21 2016/02/29 20:22:36 jca Exp $ */
2			/*
3			* Copyright 2001 Niels Provos <provos@citi.umich.edu>
4			* All rights reserved.
5			*
6			* Redistribution and use in source and binary forms, with or without
7			* modification, are permitted provided that the following conditions
8			* are met:
9			* 1. Redistributions of source code must retain the above copyright
10			* notice, this list of conditions and the following disclaimer.
11			* 2. Redistributions in binary form must reproduce the above copyright
12			* notice, this list of conditions and the following disclaimer in the
13			* documentation and/or other materials provided with the distribution.
14			*
15			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16			* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17			* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18			* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19			* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21			* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22			* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23			* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24			* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25			*/
26
27			#include <sys/types.h>
28			#include <sys/socket.h>
29			#include <sys/uio.h>
30
31			#include <errno.h>
32			#include <poll.h>
33			#include <string.h>
34			#include <stdarg.h>
35
36			#include "log.h"
37			#include "monitor_fdpass.h"
38
39			int
40			mm_send_fd(int sock, int fd)
41			{
42			struct msghdr msg;
43			union {
44			struct cmsghdr hdr;
45			char buf[CMSG_SPACE(sizeof(int))];
46			} cmsgbuf;
47			struct cmsghdr *cmsg;
48			struct iovec vec;
49			char ch = '\0';
50			ssize_t n;
51			struct pollfd pfd;
52
53			memset(&msg, 0, sizeof(msg));
54			memset(&cmsgbuf, 0, sizeof(cmsgbuf));
55			msg.msg_control = (caddr_t)&cmsgbuf.buf;
56			msg.msg_controllen = sizeof(cmsgbuf.buf);
57			cmsg = CMSG_FIRSTHDR(&msg);
58			cmsg->cmsg_len = CMSG_LEN(sizeof(int));
59			cmsg->cmsg_level = SOL_SOCKET;
60			cmsg->cmsg_type = SCM_RIGHTS;
61			(int )CMSG_DATA(cmsg) = fd;
62
63			vec.iov_base = &ch;
64			vec.iov_len = 1;
65			msg.msg_iov = &vec;
66			msg.msg_iovlen = 1;
67
68			pfd.fd = sock;
69			pfd.events = POLLOUT;
70			while ((n = sendmsg(sock, &msg, 0)) == -1 &&
71			(errno == EAGAIN \|\| errno == EINTR)) {
72			debug3("%s: sendmsg(%d): %s", __func__, fd, strerror(errno));
73			(void)poll(&pfd, 1, -1);
74			}
75			if (n == -1) {
76			error("%s: sendmsg(%d): %s", __func__, fd,
77			strerror(errno));
78			return -1;
79			}
80
81			if (n != 1) {
82			error("%s: sendmsg: expected sent 1 got %zd", __func__, n);
83			return -1;
84			}
85			return 0;
86			}
87
88			int
89			mm_receive_fd(int sock)
90			{
91			struct msghdr msg;
92			union {
93			struct cmsghdr hdr;
94			char buf[CMSG_SPACE(sizeof(int))];
95			} cmsgbuf;
96			struct cmsghdr *cmsg;
97			struct iovec vec;
98			ssize_t n;
99			char ch;
100			int fd;
101			struct pollfd pfd;
102
103			memset(&msg, 0, sizeof(msg));
104			memset(&cmsgbuf, 0, sizeof(cmsgbuf));
105			vec.iov_base = &ch;
106			vec.iov_len = 1;
107			msg.msg_iov = &vec;
108			msg.msg_iovlen = 1;
109			msg.msg_control = &cmsgbuf.buf;
110			msg.msg_controllen = sizeof(cmsgbuf.buf);
111
112			pfd.fd = sock;
113			pfd.events = POLLIN;
114			while ((n = recvmsg(sock, &msg, 0)) == -1 &&
115			(errno == EAGAIN \|\| errno == EINTR)) {
116			debug3("%s: recvmsg: %s", __func__, strerror(errno));
117			(void)poll(&pfd, 1, -1);
118			}
119			if (n == -1) {
120			error("%s: recvmsg: %s", __func__, strerror(errno));
121			return -1;
122			}
123
124			if (n != 1) {
125			error("%s: recvmsg: expected received 1 got %zd", __func__, n);
126			return -1;
127			}
128
129			cmsg = CMSG_FIRSTHDR(&msg);
130			if (cmsg == NULL) {
131			error("%s: no message header", __func__);
132			return -1;
133			}
134
135			if (cmsg->cmsg_type != SCM_RIGHTS) {
136			error("%s: expected type %d got %d", __func__,
137			SCM_RIGHTS, cmsg->cmsg_type);
138			return -1;
139			}
140			fd = ((int )CMSG_DATA(cmsg));
141			return fd;
142			}