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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/sndiod/fdpass.c	Lines:	0	188	0.0 %
Date:	2017-11-07	Branches:	0	85	0.0 %


/*	$OpenBSD: fdpass.c,v 1.3 2016/01/08 16:17:31 ratchov Exp $	*/
/*
 * Copyright (c) 2015 Alexandre Ratchov <alex@caoua.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include <sys/socket.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <sndio.h>
#include <string.h>
#include <unistd.h>
#include "dev.h"
#include "fdpass.h"
#include "file.h"
#include "listen.h"
#include "midi.h"
#include "sock.h"
#include "utils.h"

struct fdpass_msg {
#define FDPASS_OPEN_SND		0	/* open an audio device */
#define FDPASS_OPEN_MIDI	1	/* open a midi port */
#define FDPASS_RETURN		3	/* return after above commands */
	unsigned int cmd;		/* one of above */
	unsigned int num;		/* audio device or midi port number */
	unsigned int mode;		/* SIO_PLAY, SIO_REC, MIO_IN, ... */
};

int fdpass_pollfd(void *, struct pollfd *);
int fdpass_revents(void *, struct pollfd *);
void fdpass_in_worker(void *);
void fdpass_in_helper(void *);
void fdpass_out(void *);
void fdpass_hup(void *);

struct fileops worker_fileops = {
	"worker",
	fdpass_pollfd,
	fdpass_revents,
	fdpass_in_worker,
	fdpass_out,
	fdpass_hup
};

struct fileops helper_fileops = {
	"helper",
	fdpass_pollfd,
	fdpass_revents,
	fdpass_in_helper,
	fdpass_out,
	fdpass_hup
};

struct fdpass {
	struct file *file;
	int fd;
} *fdpass_peer = NULL;

static void
fdpass_log(struct fdpass *f)
{
	log_puts(f->file->name);
}

static int
fdpass_send(struct fdpass *f, int cmd, int num, int mode, int fd)
{
	struct fdpass_msg data;
	struct msghdr msg;
	struct cmsghdr *cmsg;
	union {
		struct cmsghdr hdr;
		unsigned char buf[CMSG_SPACE(sizeof(int))];
	} cmsgbuf;
	struct iovec iov;
	ssize_t n;

	data.cmd = cmd;
	data.num = num;
	data.mode = mode;
	iov.iov_base = &data;
	iov.iov_len = sizeof(struct fdpass_msg);
	memset(&msg, 0, sizeof(msg));
	msg.msg_iov = &iov;
	msg.msg_iovlen = 1;
	if (fd >= 0) {
		msg.msg_control = &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;
	}
	n = sendmsg(f->fd, &msg, 0);
	if (n < 0) {
		if (log_level >= 1) {
			fdpass_log(f);
			log_puts(": sendmsg failed\n");
		}
		fdpass_close(f);
		return 0;
	}
	if (n != sizeof(struct fdpass_msg)) {
		if (log_level >= 1) {
			fdpass_log(f);
			log_puts(": short write\n");
		}
		fdpass_close(f);
		return 0;
	}
#ifdef DEBUG
	if (log_level >= 3) {
		fdpass_log(f);
		log_puts(": send: cmd = ");
		log_puti(cmd);
		log_puts(", num = ");
		log_puti(num);
		log_puts(", mode = ");
		log_puti(mode);
		log_puts(", fd = ");
		log_puti(fd);
		log_puts("\n");
	}
#endif
	if (fd >= 0)
		close(fd);
	return 1;
}

static int
fdpass_recv(struct fdpass *f, int *cmd, int *num, int *mode, int *fd)
{
	struct fdpass_msg data;
	struct msghdr msg;
	struct cmsghdr *cmsg;
	union {
		struct cmsghdr hdr;
		unsigned char buf[CMSG_SPACE(sizeof(int))];
	} cmsgbuf;
	struct iovec iov;
	ssize_t n;

	iov.iov_base = &data;
	iov.iov_len = sizeof(struct fdpass_msg);
	memset(&msg, 0, sizeof(msg));
	msg.msg_control = &cmsgbuf.buf;
	msg.msg_controllen = sizeof(cmsgbuf.buf);
	msg.msg_iov = &iov;
	msg.msg_iovlen = 1;
	n = recvmsg(f->fd, &msg, MSG_WAITALL);
	if (n < 0 && errno == EMSGSIZE) {
		if (log_level >= 1) {
			fdpass_log(f);
			log_puts(": out of fds\n");
		}
		/*
		 * ancillary data (ie the fd) is discarded,
		 * retrieve the message
		 */
		n = recvmsg(f->fd, &msg, MSG_WAITALL);
	}
	if (n < 0) {
		if (log_level >= 1) {
			fdpass_log(f);
			log_puts(": recvmsg failed\n");
		}
		fdpass_close(f);
		return 0;
	}
	if (n == 0) {
		if (log_level >= 3) {
			fdpass_log(f);
			log_puts(": recvmsg eof\n");
		}
		fdpass_close(f);
		return 0;
	}
	if (msg.msg_flags & (MSG_TRUNC | MSG_CTRUNC)) {
		if (log_level >= 1) {
			fdpass_log(f);
			log_puts(": truncated\n");
		}
		fdpass_close(f);
		return 0;
	}
	cmsg = CMSG_FIRSTHDR(&msg);
	for (;;) {
		if (cmsg == NULL) {
			*fd = -1;
			break;
		}
		if (cmsg->cmsg_len == CMSG_LEN(sizeof(int)) &&
		    cmsg->cmsg_level == SOL_SOCKET &&
		    cmsg->cmsg_type == SCM_RIGHTS) {
			*fd = *(int *)CMSG_DATA(cmsg);
			break;
		}
		cmsg = CMSG_NXTHDR(&msg, cmsg);
	}
	*cmd = data.cmd;
	*num = data.num;
	*mode = data.mode;
#ifdef DEBUG
	if (log_level >= 3) {
		fdpass_log(f);
		log_puts(": recv: cmd = ");
		log_puti(*cmd);
		log_puts(", num = ");
		log_puti(*num);
		log_puts(", mode = ");
		log_puti(*mode);
		log_puts(", fd = ");
		log_puti(*fd);
		log_puts("\n");
	}
#endif
	return 1;
}

static int
fdpass_waitret(struct fdpass *f, int *retfd)
{
	int cmd, unused;

	if (!fdpass_recv(fdpass_peer, &cmd, &unused, &unused, retfd))
		return 0;
	if (cmd != FDPASS_RETURN) {
		if (log_level >= 1) {
			fdpass_log(f);
			log_puts(": expected RETURN message\n");
		}
		fdpass_close(f);
		return 0;
	}
	return 1;
}

struct sio_hdl *
fdpass_sio_open(int num, unsigned int mode)
{
	int fd;

	if (!fdpass_send(fdpass_peer, FDPASS_OPEN_SND, num, mode, -1))
		return NULL;
	if (!fdpass_waitret(fdpass_peer, &fd))
		return NULL;
	if (fd < 0)
		return NULL;
	return sio_sun_fdopen(fd, mode, 1);
}

struct mio_hdl *
fdpass_mio_open(int num, unsigned int mode)
{
	int fd;

	if (!fdpass_send(fdpass_peer, FDPASS_OPEN_MIDI, num, mode, -1))
		return NULL;
	if (!fdpass_waitret(fdpass_peer, &fd))
		return NULL;
	if (fd < 0)
		return NULL;
	return mio_rmidi_fdopen(fd, mode, 1);
}

void
fdpass_in_worker(void *arg)
{
	struct fdpass *f = arg;

	if (log_level >= 3) {
		fdpass_log(f);
		log_puts(": exit\n");
	}
	fdpass_close(f);
	return;
}

void
fdpass_in_helper(void *arg)
{
	int cmd, num, mode, fd;
	struct fdpass *f = arg;
	struct dev *d;
	struct port *p;

	if (!fdpass_recv(f, &cmd, &num, &mode, &fd))
		return;
	switch (cmd) {
	case FDPASS_OPEN_SND:
		d = dev_bynum(num);
		if (d == NULL || !(mode & (SIO_PLAY | SIO_REC))) {
			if (log_level >= 1) {
				fdpass_log(f);
				log_puts(": bad audio device or mode\n");
			}
			fdpass_close(f);
			return;
		}
		fd = sio_sun_getfd(d->path, mode, 1);
		break;
	case FDPASS_OPEN_MIDI:
		p = port_bynum(num);
		if (p == NULL || !(mode & (MIO_IN | MIO_OUT))) {
			if (log_level >= 1) {
				fdpass_log(f);
				log_puts(": bad midi port or mode\n");
			}
			fdpass_close(f);
			return;
		}
		fd = mio_rmidi_getfd(p->path, mode, 1);
		break;
	default:
		fdpass_close(f);
		return;
	}
	fdpass_send(f, FDPASS_RETURN, 0, 0, fd);
}

void
fdpass_out(void *arg)
{
}

void
fdpass_hup(void *arg)
{
	struct fdpass *f = arg;

	if (log_level >= 3) {
		fdpass_log(f);
		log_puts(": hup\n");
	}
	fdpass_close(f);
}

struct fdpass *
fdpass_new(int sock, struct fileops *ops)
{
	struct fdpass *f;

	f = xmalloc(sizeof(struct fdpass));
	f->file = file_new(ops, f, ops->name, 1);
	if (f->file == NULL) {
		close(sock);
		return NULL;
	}
	f->fd = sock;
	fdpass_peer = f;
	return f;
}

void
fdpass_close(struct fdpass *f)
{
	fdpass_peer = NULL;
	file_del(f->file);
	close(f->fd);
	xfree(f);
}

int
fdpass_pollfd(void *arg, struct pollfd *pfd)
{
	struct fdpass *f = arg;

	pfd->fd = f->fd;
	pfd->events = POLLIN;
	return 1;
}

int
fdpass_revents(void *arg, struct pollfd *pfd)
{
	return pfd->revents;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: fdpass.c,v 1.3 2016/01/08 16:17:31 ratchov Exp $ */
2			/*
3			* Copyright (c) 2015 Alexandre Ratchov <alex@caoua.org>
4			*
5			* Permission to use, copy, modify, and distribute this software for any
6			* purpose with or without fee is hereby granted, provided that the above
7			* copyright notice and this permission notice appear in all copies.
8			*
9			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16			*/
17			#include <sys/socket.h>
18			#include <errno.h>
19			#include <fcntl.h>
20			#include <poll.h>
21			#include <sndio.h>
22			#include <string.h>
23			#include <unistd.h>
24			#include "dev.h"
25			#include "fdpass.h"
26			#include "file.h"
27			#include "listen.h"
28			#include "midi.h"
29			#include "sock.h"
30			#include "utils.h"
31
32			struct fdpass_msg {
33			#define FDPASS_OPEN_SND 0 /* open an audio device */
34			#define FDPASS_OPEN_MIDI 1 /* open a midi port */
35			#define FDPASS_RETURN 3 /* return after above commands */
36			unsigned int cmd; /* one of above */
37			unsigned int num; /* audio device or midi port number */
38			unsigned int mode; /* SIO_PLAY, SIO_REC, MIO_IN, ... */
39			};
40
41			int fdpass_pollfd(void , struct pollfd );
42			int fdpass_revents(void , struct pollfd );
43			void fdpass_in_worker(void *);
44			void fdpass_in_helper(void *);
45			void fdpass_out(void *);
46			void fdpass_hup(void *);
47
48			struct fileops worker_fileops = {
49			"worker",
50			fdpass_pollfd,
51			fdpass_revents,
52			fdpass_in_worker,
53			fdpass_out,
54			fdpass_hup
55			};
56
57			struct fileops helper_fileops = {
58			"helper",
59			fdpass_pollfd,
60			fdpass_revents,
61			fdpass_in_helper,
62			fdpass_out,
63			fdpass_hup
64			};
65
66			struct fdpass {
67			struct file *file;
68			int fd;
69			} *fdpass_peer = NULL;
70
71			static void
72			fdpass_log(struct fdpass *f)
73			{
74			log_puts(f->file->name);
75			}
76
77			static int
78			fdpass_send(struct fdpass *f, int cmd, int num, int mode, int fd)
79			{
80			struct fdpass_msg data;
81			struct msghdr msg;
82			struct cmsghdr *cmsg;
83			union {
84			struct cmsghdr hdr;
85			unsigned char buf[CMSG_SPACE(sizeof(int))];
86			} cmsgbuf;
87			struct iovec iov;
88			ssize_t n;
89
90			data.cmd = cmd;
91			data.num = num;
92			data.mode = mode;
93			iov.iov_base = &data;
94			iov.iov_len = sizeof(struct fdpass_msg);
95			memset(&msg, 0, sizeof(msg));
96			msg.msg_iov = &iov;
97			msg.msg_iovlen = 1;
98			if (fd >= 0) {
99			msg.msg_control = &cmsgbuf.buf;
100			msg.msg_controllen = sizeof(cmsgbuf.buf);
101			cmsg = CMSG_FIRSTHDR(&msg);
102			cmsg->cmsg_len = CMSG_LEN(sizeof(int));
103			cmsg->cmsg_level = SOL_SOCKET;
104			cmsg->cmsg_type = SCM_RIGHTS;
105			(int )CMSG_DATA(cmsg) = fd;
106			}
107			n = sendmsg(f->fd, &msg, 0);
108			if (n < 0) {
109			if (log_level >= 1) {
110			fdpass_log(f);
111			log_puts(": sendmsg failed\n");
112			}
113			fdpass_close(f);
114			return 0;
115			}
116			if (n != sizeof(struct fdpass_msg)) {
117			if (log_level >= 1) {
118			fdpass_log(f);
119			log_puts(": short write\n");
120			}
121			fdpass_close(f);
122			return 0;
123			}
124			#ifdef DEBUG
125			if (log_level >= 3) {
126			fdpass_log(f);
127			log_puts(": send: cmd = ");
128			log_puti(cmd);
129			log_puts(", num = ");
130			log_puti(num);
131			log_puts(", mode = ");
132			log_puti(mode);
133			log_puts(", fd = ");
134			log_puti(fd);
135			log_puts("\n");
136			}
137			#endif
138			if (fd >= 0)
139			close(fd);
140			return 1;
141			}
142
143			static int
144			fdpass_recv(struct fdpass f, int cmd, int num, int mode, int *fd)
145			{
146			struct fdpass_msg data;
147			struct msghdr msg;
148			struct cmsghdr *cmsg;
149			union {
150			struct cmsghdr hdr;
151			unsigned char buf[CMSG_SPACE(sizeof(int))];
152			} cmsgbuf;
153			struct iovec iov;
154			ssize_t n;
155
156			iov.iov_base = &data;
157			iov.iov_len = sizeof(struct fdpass_msg);
158			memset(&msg, 0, sizeof(msg));
159			msg.msg_control = &cmsgbuf.buf;
160			msg.msg_controllen = sizeof(cmsgbuf.buf);
161			msg.msg_iov = &iov;
162			msg.msg_iovlen = 1;
163			n = recvmsg(f->fd, &msg, MSG_WAITALL);
164			if (n < 0 && errno == EMSGSIZE) {
165			if (log_level >= 1) {
166			fdpass_log(f);
167			log_puts(": out of fds\n");
168			}
169			/*
170			* ancillary data (ie the fd) is discarded,
171			* retrieve the message
172			*/
173			n = recvmsg(f->fd, &msg, MSG_WAITALL);
174			}
175			if (n < 0) {
176			if (log_level >= 1) {
177			fdpass_log(f);
178			log_puts(": recvmsg failed\n");
179			}
180			fdpass_close(f);
181			return 0;
182			}
183			if (n == 0) {
184			if (log_level >= 3) {
185			fdpass_log(f);
186			log_puts(": recvmsg eof\n");
187			}
188			fdpass_close(f);
189			return 0;
190			}
191			if (msg.msg_flags & (MSG_TRUNC \| MSG_CTRUNC)) {
192			if (log_level >= 1) {
193			fdpass_log(f);
194			log_puts(": truncated\n");
195			}
196			fdpass_close(f);
197			return 0;
198			}
199			cmsg = CMSG_FIRSTHDR(&msg);
200			for (;;) {
201			if (cmsg == NULL) {
202			*fd = -1;
203			break;
204			}
205			if (cmsg->cmsg_len == CMSG_LEN(sizeof(int)) &&
206			cmsg->cmsg_level == SOL_SOCKET &&
207			cmsg->cmsg_type == SCM_RIGHTS) {
208			fd = (int *)CMSG_DATA(cmsg);
209			break;
210			}
211			cmsg = CMSG_NXTHDR(&msg, cmsg);
212			}
213			*cmd = data.cmd;
214			*num = data.num;
215			*mode = data.mode;
216			#ifdef DEBUG
217			if (log_level >= 3) {
218			fdpass_log(f);
219			log_puts(": recv: cmd = ");
220			log_puti(*cmd);
221			log_puts(", num = ");
222			log_puti(*num);
223			log_puts(", mode = ");
224			log_puti(*mode);
225			log_puts(", fd = ");
226			log_puti(*fd);
227			log_puts("\n");
228			}
229			#endif
230			return 1;
231			}
232
233			static int
234			fdpass_waitret(struct fdpass f, int retfd)
235			{
236			int cmd, unused;
237
238			if (!fdpass_recv(fdpass_peer, &cmd, &unused, &unused, retfd))
239			return 0;
240			if (cmd != FDPASS_RETURN) {
241			if (log_level >= 1) {
242			fdpass_log(f);
243			log_puts(": expected RETURN message\n");
244			}
245			fdpass_close(f);
246			return 0;
247			}
248			return 1;
249			}
250
251			struct sio_hdl *
252			fdpass_sio_open(int num, unsigned int mode)
253			{
254			int fd;
255
256			if (!fdpass_send(fdpass_peer, FDPASS_OPEN_SND, num, mode, -1))
257			return NULL;
258			if (!fdpass_waitret(fdpass_peer, &fd))
259			return NULL;
260			if (fd < 0)
261			return NULL;
262			return sio_sun_fdopen(fd, mode, 1);
263			}
264
265			struct mio_hdl *
266			fdpass_mio_open(int num, unsigned int mode)
267			{
268			int fd;
269
270			if (!fdpass_send(fdpass_peer, FDPASS_OPEN_MIDI, num, mode, -1))
271			return NULL;
272			if (!fdpass_waitret(fdpass_peer, &fd))
273			return NULL;
274			if (fd < 0)
275			return NULL;
276			return mio_rmidi_fdopen(fd, mode, 1);
277			}
278
279			void
280			fdpass_in_worker(void *arg)
281			{
282			struct fdpass *f = arg;
283
284			if (log_level >= 3) {
285			fdpass_log(f);
286			log_puts(": exit\n");
287			}
288			fdpass_close(f);
289			return;
290			}
291
292			void
293			fdpass_in_helper(void *arg)
294			{
295			int cmd, num, mode, fd;
296			struct fdpass *f = arg;
297			struct dev *d;
298			struct port *p;
299
300			if (!fdpass_recv(f, &cmd, &num, &mode, &fd))
301			return;
302			switch (cmd) {
303			case FDPASS_OPEN_SND:
304			d = dev_bynum(num);
305			if (d == NULL \|\| !(mode & (SIO_PLAY \| SIO_REC))) {
306			if (log_level >= 1) {
307			fdpass_log(f);
308			log_puts(": bad audio device or mode\n");
309			}
310			fdpass_close(f);
311			return;
312			}
313			fd = sio_sun_getfd(d->path, mode, 1);
314			break;
315			case FDPASS_OPEN_MIDI:
316			p = port_bynum(num);
317			if (p == NULL \|\| !(mode & (MIO_IN \| MIO_OUT))) {
318			if (log_level >= 1) {
319			fdpass_log(f);
320			log_puts(": bad midi port or mode\n");
321			}
322			fdpass_close(f);
323			return;
324			}
325			fd = mio_rmidi_getfd(p->path, mode, 1);
326			break;
327			default:
328			fdpass_close(f);
329			return;
330			}
331			fdpass_send(f, FDPASS_RETURN, 0, 0, fd);
332			}
333
334			void
335			fdpass_out(void *arg)
336			{
337			}
338
339			void
340			fdpass_hup(void *arg)
341			{
342			struct fdpass *f = arg;
343
344			if (log_level >= 3) {
345			fdpass_log(f);
346			log_puts(": hup\n");
347			}
348			fdpass_close(f);
349			}
350
351			struct fdpass *
352			fdpass_new(int sock, struct fileops *ops)
353			{
354			struct fdpass *f;
355
356			f = xmalloc(sizeof(struct fdpass));
357			f->file = file_new(ops, f, ops->name, 1);
358			if (f->file == NULL) {
359			close(sock);
360			return NULL;
361			}
362			f->fd = sock;
363			fdpass_peer = f;
364			return f;
365			}
366
367			void
368			fdpass_close(struct fdpass *f)
369			{
370			fdpass_peer = NULL;
371			file_del(f->file);
372			close(f->fd);
373			xfree(f);
374			}
375
376			int
377			fdpass_pollfd(void arg, struct pollfd pfd)
378			{
379			struct fdpass *f = arg;
380
381			pfd->fd = f->fd;
382			pfd->events = POLLIN;
383			return 1;
384			}
385
386			int
387			fdpass_revents(void arg, struct pollfd pfd)
388			{
389			return pfd->revents;
390			}