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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/smtpd/smtpd/../iobuf.c	Lines:	0	175	0.0 %
Date:	2017-11-13	Branches:	0	115	0.0 %


/*	$OpenBSD: iobuf.c,v 1.10 2017/03/17 20:56:04 eric Exp $	*/
/*
 * Copyright (c) 2012 Eric Faurot <eric@openbsd.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/types.h>
#include <sys/socket.h>
#include <sys/uio.h>

#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#ifdef IO_SSL
#include <openssl/err.h>
#include <openssl/ssl.h>
#endif

#include "iobuf.h"

#define IOBUF_MAX	65536
#define IOBUFQ_MIN	4096

struct ioqbuf	*ioqbuf_alloc(struct iobuf *, size_t);
void		 iobuf_drain(struct iobuf *, size_t);

int
iobuf_init(struct iobuf *io, size_t size, size_t max)
{
	memset(io, 0, sizeof *io);

	if (max == 0)
		max = IOBUF_MAX;

	if (size == 0)
		size = max;

	if (size > max)
		return (-1);

	if ((io->buf = calloc(size, 1)) == NULL)
		return (-1);

	io->size = size;
	io->max = max;

	return (0);
}

void
iobuf_clear(struct iobuf *io)
{
	struct ioqbuf	*q;

	free(io->buf);

	while ((q = io->outq)) {
		io->outq = q->next;
		free(q);
	}

	memset(io, 0, sizeof (*io));
}

void
iobuf_drain(struct iobuf *io, size_t n)
{
	struct	ioqbuf	*q;
	size_t		 left = n;

	while ((q = io->outq) && left) {
		if ((q->wpos - q->rpos) > left) {
			q->rpos += left;
			left = 0;
		} else {
			left -= q->wpos - q->rpos;
			io->outq = q->next;
			free(q);
		}
	}

	io->queued -= (n - left);
	if (io->outq == NULL)
		io->outqlast = NULL;
}

int
iobuf_extend(struct iobuf *io, size_t n)
{
	char	*t;

	if (n > io->max)
		return (-1);

	if (io->max - io->size < n)
		return (-1);

	t = recallocarray(io->buf, io->size, io->size + n, 1);
	if (t == NULL)
		return (-1);

	io->size += n;
	io->buf = t;

	return (0);
}

size_t
iobuf_left(struct iobuf *io)
{
	return io->size - io->wpos;
}

size_t
iobuf_space(struct iobuf *io)
{
	return io->size - (io->wpos - io->rpos);
}

size_t
iobuf_len(struct iobuf *io)
{
	return io->wpos - io->rpos;
}

char *
iobuf_data(struct iobuf *io)
{
	return io->buf + io->rpos;
}

void
iobuf_drop(struct iobuf *io, size_t n)
{
	if (n >= iobuf_len(io)) {
		io->rpos = io->wpos = 0;
		return;
	}

	io->rpos += n;
}

char *
iobuf_getline(struct iobuf *iobuf, size_t *rlen)
{
	char	*buf;
	size_t	 len, i;

	buf = iobuf_data(iobuf);
	len = iobuf_len(iobuf);

	for (i = 0; i + 1 <= len; i++)
		if (buf[i] == '\n') {
			/* Note: the returned address points into the iobuf
			 * buffer.  We NUL-end it for convenience, and discard
			 * the data from the iobuf, so that the caller doesn't
			 * have to do it.  The data remains "valid" as long
			 * as the iobuf does not overwrite it, that is until
			 * the next call to iobuf_normalize() or iobuf_extend().
			 */
			iobuf_drop(iobuf, i + 1);
			len = (i && buf[i - 1] == '\r') ? i - 1 : i;
			buf[len] = '\0';
			if (rlen)
				*rlen = len;
			return (buf);
		}

	return (NULL);
}

void
iobuf_normalize(struct iobuf *io)
{
	if (io->rpos == 0)
		return;

	if (io->rpos == io->wpos) {
		io->rpos = io->wpos = 0;
		return;
	}

	memmove(io->buf, io->buf + io->rpos, io->wpos - io->rpos);
	io->wpos -= io->rpos;
	io->rpos = 0;
}

ssize_t
iobuf_read(struct iobuf *io, int fd)
{
	ssize_t	n;

	n = read(fd, io->buf + io->wpos, iobuf_left(io));
	if (n == -1) {
		/* XXX is this really what we want? */
		if (errno == EAGAIN || errno == EINTR)
			return (IOBUF_WANT_READ);
		return (IOBUF_ERROR);
	}
	if (n == 0)
		return (IOBUF_CLOSED);

	io->wpos += n;

	return (n);
}

struct ioqbuf *
ioqbuf_alloc(struct iobuf *io, size_t len)
{
	struct ioqbuf   *q;

	if (len < IOBUFQ_MIN)
		len = IOBUFQ_MIN;

	if ((q = malloc(sizeof(*q) + len)) == NULL)
		return (NULL);

	q->rpos = 0;
	q->wpos = 0;
	q->size = len;
	q->next = NULL;
	q->buf = (char *)(q) + sizeof(*q);

	if (io->outqlast == NULL)
		io->outq = q;
	else
		io->outqlast->next = q;
	io->outqlast = q;

	return (q);
}

size_t
iobuf_queued(struct iobuf *io)
{
	return io->queued;
}

void *
iobuf_reserve(struct iobuf *io, size_t len)
{
	struct ioqbuf	*q;
	void		*r;

	if (len == 0)
		return (NULL);

	if (((q = io->outqlast) == NULL) || q->size - q->wpos <= len) {
		if ((q = ioqbuf_alloc(io, len)) == NULL)
			return (NULL);
	}

	r = q->buf + q->wpos;
	q->wpos += len;
	io->queued += len;

	return (r);
}

int
iobuf_queue(struct iobuf *io, const void *data, size_t len)
{
	void	*buf;

	if (len == 0)
		return (0);

	if ((buf = iobuf_reserve(io, len)) == NULL)
		return (-1);

	memmove(buf, data, len);

	return (len);
}

int
iobuf_queuev(struct iobuf *io, const struct iovec *iov, int iovcnt)
{
	int	 i;
	size_t	 len = 0;
	char	*buf;

	for (i = 0; i < iovcnt; i++)
		len += iov[i].iov_len;

	if ((buf = iobuf_reserve(io, len)) == NULL)
		return (-1);

	for (i = 0; i < iovcnt; i++) {
		if (iov[i].iov_len == 0)
			continue;
		memmove(buf, iov[i].iov_base, iov[i].iov_len);
		buf += iov[i].iov_len;
	}

	return (0);

}

int
iobuf_fqueue(struct iobuf *io, const char *fmt, ...)
{
	va_list	ap;
	int	len;

	va_start(ap, fmt);
	len = iobuf_vfqueue(io, fmt, ap);
	va_end(ap);

	return (len);
}

int
iobuf_vfqueue(struct iobuf *io, const char *fmt, va_list ap)
{
	char	*buf;
	int	 len;

	len = vasprintf(&buf, fmt, ap);

	if (len == -1)
		return (-1);

	len = iobuf_queue(io, buf, len);
	free(buf);

	return (len);
}

ssize_t
iobuf_write(struct iobuf *io, int fd)
{
	struct iovec	 iov[IOV_MAX];
	struct ioqbuf	*q;
	int		 i;
	ssize_t		 n;

	i = 0;
	for (q = io->outq; q ; q = q->next) {
		if (i >= IOV_MAX)
			break;
		iov[i].iov_base = q->buf + q->rpos;
		iov[i].iov_len = q->wpos - q->rpos;
		i++;
	}

	n = writev(fd, iov, i);
	if (n == -1) {
		if (errno == EAGAIN || errno == EINTR)
			return (IOBUF_WANT_WRITE);
		if (errno == EPIPE)
			return (IOBUF_CLOSED);
		return (IOBUF_ERROR);
	}

	iobuf_drain(io, n);

	return (n);
}

int
iobuf_flush(struct iobuf *io, int fd)
{
	ssize_t	s;

	while (io->queued)
		if ((s = iobuf_write(io, fd)) < 0)
			return (s);

	return (0);
}

#ifdef IO_SSL

int
iobuf_flush_ssl(struct iobuf *io, void *ssl)
{
	ssize_t	s;

	while (io->queued)
		if ((s = iobuf_write_ssl(io, ssl)) < 0)
			return (s);

	return (0);
}

ssize_t
iobuf_write_ssl(struct iobuf *io, void *ssl)
{
	struct ioqbuf	*q;
	int		 r;
	ssize_t		 n;

	q = io->outq;
	n = SSL_write(ssl, q->buf + q->rpos, q->wpos - q->rpos);
	if (n <= 0) {
		switch ((r = SSL_get_error(ssl, n))) {
		case SSL_ERROR_WANT_READ:
			return (IOBUF_WANT_READ);
		case SSL_ERROR_WANT_WRITE:
			return (IOBUF_WANT_WRITE);
		case SSL_ERROR_ZERO_RETURN: /* connection closed */
			return (IOBUF_CLOSED);
		case SSL_ERROR_SYSCALL:
			if (ERR_peek_last_error())
				return (IOBUF_SSLERROR);
			if (r == 0)
				errno = EPIPE;
			return (IOBUF_ERROR);
		default:
			return (IOBUF_SSLERROR);
		}
	}
	iobuf_drain(io, n);

	return (n);
}

ssize_t
iobuf_read_ssl(struct iobuf *io, void *ssl)
{
	ssize_t	n;
	int	r;

	n = SSL_read(ssl, io->buf + io->wpos, iobuf_left(io));
	if (n < 0) {
		switch ((r = SSL_get_error(ssl, n))) {
		case SSL_ERROR_WANT_READ:
			return (IOBUF_WANT_READ);
		case SSL_ERROR_WANT_WRITE:
			return (IOBUF_WANT_WRITE);
		case SSL_ERROR_SYSCALL:
			if (ERR_peek_last_error())
				return (IOBUF_SSLERROR);
			if (r == 0)
				errno = EPIPE;
			return (IOBUF_ERROR);
		default:
			return (IOBUF_SSLERROR);
		}
	} else if (n == 0)
		return (IOBUF_CLOSED);

	io->wpos += n;

	return (n);
}

#endif /* IO_SSL */


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: iobuf.c,v 1.10 2017/03/17 20:56:04 eric Exp $ */
2			/*
3			* Copyright (c) 2012 Eric Faurot <eric@openbsd.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
18			#include <sys/types.h>
19			#include <sys/socket.h>
20			#include <sys/uio.h>
21
22			#include <errno.h>
23			#include <limits.h>
24			#include <stdio.h>
25			#include <stdlib.h>
26			#include <string.h>
27			#include <unistd.h>
28
29			#ifdef IO_SSL
30			#include <openssl/err.h>
31			#include <openssl/ssl.h>
32			#endif
33
34			#include "iobuf.h"
35
36			#define IOBUF_MAX 65536
37			#define IOBUFQ_MIN 4096
38
39			struct ioqbuf ioqbuf_alloc(struct iobuf , size_t);
40			void iobuf_drain(struct iobuf *, size_t);
41
42			int
43			iobuf_init(struct iobuf *io, size_t size, size_t max)
44			{
45			memset(io, 0, sizeof *io);
46
47			if (max == 0)
48			max = IOBUF_MAX;
49
50			if (size == 0)
51			size = max;
52
53			if (size > max)
54			return (-1);
55
56			if ((io->buf = calloc(size, 1)) == NULL)
57			return (-1);
58
59			io->size = size;
60			io->max = max;
61
62			return (0);
63			}
64
65			void
66			iobuf_clear(struct iobuf *io)
67			{
68			struct ioqbuf *q;
69
70			free(io->buf);
71
72			while ((q = io->outq)) {
73			io->outq = q->next;
74			free(q);
75			}
76
77			memset(io, 0, sizeof (*io));
78			}
79
80			void
81			iobuf_drain(struct iobuf *io, size_t n)
82			{
83			struct ioqbuf *q;
84			size_t left = n;
85
86			while ((q = io->outq) && left) {
87			if ((q->wpos - q->rpos) > left) {
88			q->rpos += left;
89			left = 0;
90			} else {
91			left -= q->wpos - q->rpos;
92			io->outq = q->next;
93			free(q);
94			}
95			}
96
97			io->queued -= (n - left);
98			if (io->outq == NULL)
99			io->outqlast = NULL;
100			}
101
102			int
103			iobuf_extend(struct iobuf *io, size_t n)
104			{
105			char *t;
106
107			if (n > io->max)
108			return (-1);
109
110			if (io->max - io->size < n)
111			return (-1);
112
113			t = recallocarray(io->buf, io->size, io->size + n, 1);
114			if (t == NULL)
115			return (-1);
116
117			io->size += n;
118			io->buf = t;
119
120			return (0);
121			}
122
123			size_t
124			iobuf_left(struct iobuf *io)
125			{
126			return io->size - io->wpos;
127			}
128
129			size_t
130			iobuf_space(struct iobuf *io)
131			{
132			return io->size - (io->wpos - io->rpos);
133			}
134
135			size_t
136			iobuf_len(struct iobuf *io)
137			{
138			return io->wpos - io->rpos;
139			}
140
141			char *
142			iobuf_data(struct iobuf *io)
143			{
144			return io->buf + io->rpos;
145			}
146
147			void
148			iobuf_drop(struct iobuf *io, size_t n)
149			{
150			if (n >= iobuf_len(io)) {
151			io->rpos = io->wpos = 0;
152			return;
153			}
154
155			io->rpos += n;
156			}
157
158			char *
159			iobuf_getline(struct iobuf iobuf, size_t rlen)
160			{
161			char *buf;
162			size_t len, i;
163
164			buf = iobuf_data(iobuf);
165			len = iobuf_len(iobuf);
166
167			for (i = 0; i + 1 <= len; i++)
168			if (buf[i] == '\n') {
169			/* Note: the returned address points into the iobuf
170			* buffer. We NUL-end it for convenience, and discard
171			* the data from the iobuf, so that the caller doesn't
172			* have to do it. The data remains "valid" as long
173			* as the iobuf does not overwrite it, that is until
174			* the next call to iobuf_normalize() or iobuf_extend().
175			*/
176			iobuf_drop(iobuf, i + 1);
177			len = (i && buf[i - 1] == '\r') ? i - 1 : i;
178			buf[len] = '\0';
179			if (rlen)
180			*rlen = len;
181			return (buf);
182			}
183
184			return (NULL);
185			}
186
187			void
188			iobuf_normalize(struct iobuf *io)
189			{
190			if (io->rpos == 0)
191			return;
192
193			if (io->rpos == io->wpos) {
194			io->rpos = io->wpos = 0;
195			return;
196			}
197
198			memmove(io->buf, io->buf + io->rpos, io->wpos - io->rpos);
199			io->wpos -= io->rpos;
200			io->rpos = 0;
201			}
202
203			ssize_t
204			iobuf_read(struct iobuf *io, int fd)
205			{
206			ssize_t n;
207
208			n = read(fd, io->buf + io->wpos, iobuf_left(io));
209			if (n == -1) {
210			/* XXX is this really what we want? */
211			if (errno == EAGAIN \|\| errno == EINTR)
212			return (IOBUF_WANT_READ);
213			return (IOBUF_ERROR);
214			}
215			if (n == 0)
216			return (IOBUF_CLOSED);
217
218			io->wpos += n;
219
220			return (n);
221			}
222
223			struct ioqbuf *
224			ioqbuf_alloc(struct iobuf *io, size_t len)
225			{
226			struct ioqbuf *q;
227
228			if (len < IOBUFQ_MIN)
229			len = IOBUFQ_MIN;
230
231			if ((q = malloc(sizeof(*q) + len)) == NULL)
232			return (NULL);
233
234			q->rpos = 0;
235			q->wpos = 0;
236			q->size = len;
237			q->next = NULL;
238			q->buf = (char )(q) + sizeof(q);
239
240			if (io->outqlast == NULL)
241			io->outq = q;
242			else
243			io->outqlast->next = q;
244			io->outqlast = q;
245
246			return (q);
247			}
248
249			size_t
250			iobuf_queued(struct iobuf *io)
251			{
252			return io->queued;
253			}
254
255			void *
256			iobuf_reserve(struct iobuf *io, size_t len)
257			{
258			struct ioqbuf *q;
259			void *r;
260
261			if (len == 0)
262			return (NULL);
263
264			if (((q = io->outqlast) == NULL) \|\| q->size - q->wpos <= len) {
265			if ((q = ioqbuf_alloc(io, len)) == NULL)
266			return (NULL);
267			}
268
269			r = q->buf + q->wpos;
270			q->wpos += len;
271			io->queued += len;
272
273			return (r);
274			}
275
276			int
277			iobuf_queue(struct iobuf io, const void data, size_t len)
278			{
279			void *buf;
280
281			if (len == 0)
282			return (0);
283
284			if ((buf = iobuf_reserve(io, len)) == NULL)
285			return (-1);
286
287			memmove(buf, data, len);
288
289			return (len);
290			}
291
292			int
293			iobuf_queuev(struct iobuf io, const struct iovec iov, int iovcnt)
294			{
295			int i;
296			size_t len = 0;
297			char *buf;
298
299			for (i = 0; i < iovcnt; i++)
300			len += iov[i].iov_len;
301
302			if ((buf = iobuf_reserve(io, len)) == NULL)
303			return (-1);
304
305			for (i = 0; i < iovcnt; i++) {
306			if (iov[i].iov_len == 0)
307			continue;
308			memmove(buf, iov[i].iov_base, iov[i].iov_len);
309			buf += iov[i].iov_len;
310			}
311
312			return (0);
313
314			}
315
316			int
317			iobuf_fqueue(struct iobuf io, const char fmt, ...)
318			{
319			va_list ap;
320			int len;
321
322			va_start(ap, fmt);
323			len = iobuf_vfqueue(io, fmt, ap);
324			va_end(ap);
325
326			return (len);
327			}
328
329			int
330			iobuf_vfqueue(struct iobuf io, const char fmt, va_list ap)
331			{
332			char *buf;
333			int len;
334
335			len = vasprintf(&buf, fmt, ap);
336
337			if (len == -1)
338			return (-1);
339
340			len = iobuf_queue(io, buf, len);
341			free(buf);
342
343			return (len);
344			}
345
346			ssize_t
347			iobuf_write(struct iobuf *io, int fd)
348			{
349			struct iovec iov[IOV_MAX];
350			struct ioqbuf *q;
351			int i;
352			ssize_t n;
353
354			i = 0;
355			for (q = io->outq; q ; q = q->next) {
356			if (i >= IOV_MAX)
357			break;
358			iov[i].iov_base = q->buf + q->rpos;
359			iov[i].iov_len = q->wpos - q->rpos;
360			i++;
361			}
362
363			n = writev(fd, iov, i);
364			if (n == -1) {
365			if (errno == EAGAIN \|\| errno == EINTR)
366			return (IOBUF_WANT_WRITE);
367			if (errno == EPIPE)
368			return (IOBUF_CLOSED);
369			return (IOBUF_ERROR);
370			}
371
372			iobuf_drain(io, n);
373
374			return (n);
375			}
376
377			int
378			iobuf_flush(struct iobuf *io, int fd)
379			{
380			ssize_t s;
381
382			while (io->queued)
383			if ((s = iobuf_write(io, fd)) < 0)
384			return (s);
385
386			return (0);
387			}
388
389			#ifdef IO_SSL
390
391			int
392			iobuf_flush_ssl(struct iobuf io, void ssl)
393			{
394			ssize_t s;
395
396			while (io->queued)
397			if ((s = iobuf_write_ssl(io, ssl)) < 0)
398			return (s);
399
400			return (0);
401			}
402
403			ssize_t
404			iobuf_write_ssl(struct iobuf io, void ssl)
405			{
406			struct ioqbuf *q;
407			int r;
408			ssize_t n;
409
410			q = io->outq;
411			n = SSL_write(ssl, q->buf + q->rpos, q->wpos - q->rpos);
412			if (n <= 0) {
413			switch ((r = SSL_get_error(ssl, n))) {
414			case SSL_ERROR_WANT_READ:
415			return (IOBUF_WANT_READ);
416			case SSL_ERROR_WANT_WRITE:
417			return (IOBUF_WANT_WRITE);
418			case SSL_ERROR_ZERO_RETURN: /* connection closed */
419			return (IOBUF_CLOSED);
420			case SSL_ERROR_SYSCALL:
421			if (ERR_peek_last_error())
422			return (IOBUF_SSLERROR);
423			if (r == 0)
424			errno = EPIPE;
425			return (IOBUF_ERROR);
426			default:
427			return (IOBUF_SSLERROR);
428			}
429			}
430			iobuf_drain(io, n);
431
432			return (n);
433			}
434
435			ssize_t
436			iobuf_read_ssl(struct iobuf io, void ssl)
437			{
438			ssize_t n;
439			int r;
440
441			n = SSL_read(ssl, io->buf + io->wpos, iobuf_left(io));
442			if (n < 0) {
443			switch ((r = SSL_get_error(ssl, n))) {
444			case SSL_ERROR_WANT_READ:
445			return (IOBUF_WANT_READ);
446			case SSL_ERROR_WANT_WRITE:
447			return (IOBUF_WANT_WRITE);
448			case SSL_ERROR_SYSCALL:
449			if (ERR_peek_last_error())
450			return (IOBUF_SSLERROR);
451			if (r == 0)
452			errno = EPIPE;
453			return (IOBUF_ERROR);
454			default:
455			return (IOBUF_SSLERROR);
456			}
457			} else if (n == 0)
458			return (IOBUF_CLOSED);
459
460			io->wpos += n;
461
462			return (n);
463			}
464
465			#endif /* IO_SSL */