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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/tftp-proxy/filter.c	Lines:	0	98	0.0 %
Date:	2017-11-07	Branches:	0	42	0.0 %


/*	$OpenBSD: filter.c,v 1.2 2015/01/21 21:50:33 deraadt Exp $ */

/*
 * Copyright (c) 2004, 2005 Camiel Dobbelaar, <cd@sentia.nl>
 *
 * 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 <syslog.h>

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

#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <net/pfvar.h>

#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "filter.h"

/* From netinet/in.h, but only _KERNEL_ gets them. */
#define satosin(sa)	((struct sockaddr_in *)(sa))
#define satosin6(sa)	((struct sockaddr_in6 *)(sa))

enum { TRANS_FILTER = 0, TRANS_NAT, TRANS_RDR, TRANS_SIZE };

int prepare_rule(u_int32_t, struct sockaddr *, struct sockaddr *,
    u_int16_t, u_int8_t);

static struct pfioc_rule	pfr;
static struct pfioc_trans	pft;
static struct pfioc_trans_e	pfte;
static int dev, rule_log;
static char *qname;

int
add_filter(u_int32_t id, u_int8_t dir, struct sockaddr *src,
    struct sockaddr *dst, u_int16_t d_port, u_int8_t proto)
{
	if (!src || !dst || !d_port || !proto) {
		errno = EINVAL;
		return (-1);
	}

	if (prepare_rule(id, src, dst, d_port, proto) == -1)
		return (-1);

	pfr.rule.direction = dir;
	if (ioctl(dev, DIOCADDRULE, &pfr) == -1)
		return (-1);

	return (0);
}

int
add_rdr(u_int32_t id, struct sockaddr *src, struct sockaddr *dst,
    u_int16_t d_port, struct sockaddr *rdr, u_int16_t rdr_port, u_int8_t proto)
{
	if (!src || !dst || !d_port || !rdr || !rdr_port || !proto ||
	    (src->sa_family != rdr->sa_family)) {
		errno = EINVAL;
		return (-1);
	}

	if (prepare_rule(id, src, dst, d_port, proto) == -1)
		return (-1);

	pfr.rule.rdr.addr.type = PF_ADDR_ADDRMASK;
	if (rdr->sa_family == AF_INET) {
		memcpy(&pfr.rule.rdr.addr.v.a.addr.v4,
		    &satosin(rdr)->sin_addr.s_addr, 4);
		memset(&pfr.rule.rdr.addr.v.a.mask.addr8, 255, 4);
	} else {
		memcpy(&pfr.rule.rdr.addr.v.a.addr.v6,
		    &satosin6(rdr)->sin6_addr.s6_addr, 16);
		memset(&pfr.rule.rdr.addr.v.a.mask.addr8, 255, 16);
	}

	pfr.rule.rdr.proxy_port[0] = rdr_port;
	if (ioctl(dev, DIOCADDRULE, &pfr) == -1)
		return (-1);

	return (0);
}

int
do_commit(void)
{
	if (ioctl(dev, DIOCXCOMMIT, &pft) == -1)
		return (-1);

	return (0);
}

int
do_rollback(void)
{
	if (ioctl(dev, DIOCXROLLBACK, &pft) == -1)
		return (-1);

	return (0);
}

void
init_filter(char *opt_qname, int opt_verbose)
{
	struct pf_status status;

	qname = opt_qname;

	if (opt_verbose == 1)
		rule_log = PF_LOG;
	else if (opt_verbose == 2)
		rule_log = PF_LOG_ALL;

	dev = open("/dev/pf", O_RDWR);
	if (dev == -1) {
		syslog(LOG_ERR, "can't open /dev/pf");
		exit(1);
	}
	if (ioctl(dev, DIOCGETSTATUS, &status) == -1) {
		syslog(LOG_ERR, "DIOCGETSTATUS");
		exit(1);
	}
	if (!status.running) {
		syslog(LOG_ERR, "pf is disabled");
		exit(1);
	}
}

int
prepare_commit(u_int32_t id)
{
	memset(&pft, 0, sizeof pft);
	memset(&pfte, 0, sizeof pfte);
	pft.size = 1;
	pft.esize = sizeof pfte;
	pft.array = &pfte;

	snprintf(pfte.anchor, PF_ANCHOR_NAME_SIZE,
	    "%s/%d.%08x", FTP_PROXY_ANCHOR, getpid(), id);
	pfte.type = PF_TRANS_RULESET;

	if (ioctl(dev, DIOCXBEGIN, &pft) == -1)
		return (-1);

	return (0);
}

int
prepare_rule(u_int32_t id, struct sockaddr *src,
    struct sockaddr *dst, u_int16_t d_port, u_int8_t proto)
{
	if ((src->sa_family != AF_INET && src->sa_family != AF_INET6) ||
	    (src->sa_family != dst->sa_family)) {
		errno = EPROTONOSUPPORT;
		return (-1);
	}

	memset(&pfr, 0, sizeof pfr);
	snprintf(pfr.anchor, PF_ANCHOR_NAME_SIZE,
	    "%s/%d.%08x", FTP_PROXY_ANCHOR, getpid(), id);

	pfr.ticket = pfte.ticket;

	/* Generic for all rule types. */
	pfr.rule.af = src->sa_family;
	pfr.rule.proto = proto;
	pfr.rule.src.addr.type = PF_ADDR_ADDRMASK;
	pfr.rule.dst.addr.type = PF_ADDR_ADDRMASK;
	pfr.rule.rdr.addr.type = PF_ADDR_NONE;
	pfr.rule.nat.addr.type = PF_ADDR_NONE;

	if (src->sa_family == AF_INET) {
		memcpy(&pfr.rule.src.addr.v.a.addr.v4,
		    &satosin(src)->sin_addr.s_addr, 4);
		memset(&pfr.rule.src.addr.v.a.mask.addr8, 255, 4);
		memcpy(&pfr.rule.dst.addr.v.a.addr.v4,
		    &satosin(dst)->sin_addr.s_addr, 4);
		memset(&pfr.rule.dst.addr.v.a.mask.addr8, 255, 4);
	} else {
		memcpy(&pfr.rule.src.addr.v.a.addr.v6,
		    &satosin6(src)->sin6_addr.s6_addr, 16);
		memset(&pfr.rule.src.addr.v.a.mask.addr8, 255, 16);
		memcpy(&pfr.rule.dst.addr.v.a.addr.v6,
		    &satosin6(dst)->sin6_addr.s6_addr, 16);
		memset(&pfr.rule.dst.addr.v.a.mask.addr8, 255, 16);
	}
	pfr.rule.dst.port_op = PF_OP_EQ;
	pfr.rule.dst.port[0] = htons(d_port);
#ifdef notyet
	pfr.rule.rule_flag = PFRULE_ONCE;
#endif
	pfr.rule.action = PF_PASS;
	pfr.rule.quick = 1;
	pfr.rule.log = rule_log;
	pfr.rule.keep_state = 1;
	pfr.rule.flags = (proto == IPPROTO_TCP ? TH_SYN : 0);
	pfr.rule.flagset = (proto == IPPROTO_TCP ?
	    (TH_SYN|TH_ACK|TH_FIN|TH_RST) : 0);
#ifdef notyet
	pfr.rule.max_states = 1;
#endif
	if (qname != NULL)
		strlcpy(pfr.rule.qname, qname, sizeof pfr.rule.qname);

	return (0);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: filter.c,v 1.2 2015/01/21 21:50:33 deraadt Exp $ */
2
3			/*
4			* Copyright (c) 2004, 2005 Camiel Dobbelaar, <cd@sentia.nl>
5			*
6			* Permission to use, copy, modify, and distribute this software for any
7			* purpose with or without fee is hereby granted, provided that the above
8			* copyright notice and this permission notice appear in all copies.
9			*
10			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18
19			#include <syslog.h>
20
21			#include <sys/ioctl.h>
22			#include <sys/types.h>
23			#include <sys/socket.h>
24
25			#include <netinet/in.h>
26			#include <netinet/tcp.h>
27			#include <arpa/inet.h>
28			#include <net/if.h>
29			#include <net/pfvar.h>
30
31			#include <err.h>
32			#include <errno.h>
33			#include <fcntl.h>
34			#include <stdio.h>
35			#include <stdlib.h>
36			#include <string.h>
37			#include <unistd.h>
38
39			#include "filter.h"
40
41			/* From netinet/in.h, but only _KERNEL_ gets them. */
42			#define satosin(sa) ((struct sockaddr_in *)(sa))
43			#define satosin6(sa) ((struct sockaddr_in6 *)(sa))
44
45			enum { TRANS_FILTER = 0, TRANS_NAT, TRANS_RDR, TRANS_SIZE };
46
47			int prepare_rule(u_int32_t, struct sockaddr , struct sockaddr ,
48			u_int16_t, u_int8_t);
49
50			static struct pfioc_rule pfr;
51			static struct pfioc_trans pft;
52			static struct pfioc_trans_e pfte;
53			static int dev, rule_log;
54			static char *qname;
55
56			int
57			add_filter(u_int32_t id, u_int8_t dir, struct sockaddr *src,
58			struct sockaddr *dst, u_int16_t d_port, u_int8_t proto)
59			{
60			if (!src \|\| !dst \|\| !d_port \|\| !proto) {
61			errno = EINVAL;
62			return (-1);
63			}
64
65			if (prepare_rule(id, src, dst, d_port, proto) == -1)
66			return (-1);
67
68			pfr.rule.direction = dir;
69			if (ioctl(dev, DIOCADDRULE, &pfr) == -1)
70			return (-1);
71
72			return (0);
73			}
74
75			int
76			add_rdr(u_int32_t id, struct sockaddr src, struct sockaddr dst,
77			u_int16_t d_port, struct sockaddr *rdr, u_int16_t rdr_port, u_int8_t proto)
78			{
79			if (!src \|\| !dst \|\| !d_port \|\| !rdr \|\| !rdr_port \|\| !proto \|\|
80			(src->sa_family != rdr->sa_family)) {
81			errno = EINVAL;
82			return (-1);
83			}
84
85			if (prepare_rule(id, src, dst, d_port, proto) == -1)
86			return (-1);
87
88			pfr.rule.rdr.addr.type = PF_ADDR_ADDRMASK;
89			if (rdr->sa_family == AF_INET) {
90			memcpy(&pfr.rule.rdr.addr.v.a.addr.v4,
91			&satosin(rdr)->sin_addr.s_addr, 4);
92			memset(&pfr.rule.rdr.addr.v.a.mask.addr8, 255, 4);
93			} else {
94			memcpy(&pfr.rule.rdr.addr.v.a.addr.v6,
95			&satosin6(rdr)->sin6_addr.s6_addr, 16);
96			memset(&pfr.rule.rdr.addr.v.a.mask.addr8, 255, 16);
97			}
98
99			pfr.rule.rdr.proxy_port[0] = rdr_port;
100			if (ioctl(dev, DIOCADDRULE, &pfr) == -1)
101			return (-1);
102
103			return (0);
104			}
105
106			int
107			do_commit(void)
108			{
109			if (ioctl(dev, DIOCXCOMMIT, &pft) == -1)
110			return (-1);
111
112			return (0);
113			}
114
115			int
116			do_rollback(void)
117			{
118			if (ioctl(dev, DIOCXROLLBACK, &pft) == -1)
119			return (-1);
120
121			return (0);
122			}
123
124			void
125			init_filter(char *opt_qname, int opt_verbose)
126			{
127			struct pf_status status;
128
129			qname = opt_qname;
130
131			if (opt_verbose == 1)
132			rule_log = PF_LOG;
133			else if (opt_verbose == 2)
134			rule_log = PF_LOG_ALL;
135
136			dev = open("/dev/pf", O_RDWR);
137			if (dev == -1) {
138			syslog(LOG_ERR, "can't open /dev/pf");
139			exit(1);
140			}
141			if (ioctl(dev, DIOCGETSTATUS, &status) == -1) {
142			syslog(LOG_ERR, "DIOCGETSTATUS");
143			exit(1);
144			}
145			if (!status.running) {
146			syslog(LOG_ERR, "pf is disabled");
147			exit(1);
148			}
149			}
150
151			int
152			prepare_commit(u_int32_t id)
153			{
154			memset(&pft, 0, sizeof pft);
155			memset(&pfte, 0, sizeof pfte);
156			pft.size = 1;
157			pft.esize = sizeof pfte;
158			pft.array = &pfte;
159
160			snprintf(pfte.anchor, PF_ANCHOR_NAME_SIZE,
161			"%s/%d.%08x", FTP_PROXY_ANCHOR, getpid(), id);
162			pfte.type = PF_TRANS_RULESET;
163
164			if (ioctl(dev, DIOCXBEGIN, &pft) == -1)
165			return (-1);
166
167			return (0);
168			}
169
170			int
171			prepare_rule(u_int32_t id, struct sockaddr *src,
172			struct sockaddr *dst, u_int16_t d_port, u_int8_t proto)
173			{
174			if ((src->sa_family != AF_INET && src->sa_family != AF_INET6) \|\|
175			(src->sa_family != dst->sa_family)) {
176			errno = EPROTONOSUPPORT;
177			return (-1);
178			}
179
180			memset(&pfr, 0, sizeof pfr);
181			snprintf(pfr.anchor, PF_ANCHOR_NAME_SIZE,
182			"%s/%d.%08x", FTP_PROXY_ANCHOR, getpid(), id);
183
184			pfr.ticket = pfte.ticket;
185
186			/* Generic for all rule types. */
187			pfr.rule.af = src->sa_family;
188			pfr.rule.proto = proto;
189			pfr.rule.src.addr.type = PF_ADDR_ADDRMASK;
190			pfr.rule.dst.addr.type = PF_ADDR_ADDRMASK;
191			pfr.rule.rdr.addr.type = PF_ADDR_NONE;
192			pfr.rule.nat.addr.type = PF_ADDR_NONE;
193
194			if (src->sa_family == AF_INET) {
195			memcpy(&pfr.rule.src.addr.v.a.addr.v4,
196			&satosin(src)->sin_addr.s_addr, 4);
197			memset(&pfr.rule.src.addr.v.a.mask.addr8, 255, 4);
198			memcpy(&pfr.rule.dst.addr.v.a.addr.v4,
199			&satosin(dst)->sin_addr.s_addr, 4);
200			memset(&pfr.rule.dst.addr.v.a.mask.addr8, 255, 4);
201			} else {
202			memcpy(&pfr.rule.src.addr.v.a.addr.v6,
203			&satosin6(src)->sin6_addr.s6_addr, 16);
204			memset(&pfr.rule.src.addr.v.a.mask.addr8, 255, 16);
205			memcpy(&pfr.rule.dst.addr.v.a.addr.v6,
206			&satosin6(dst)->sin6_addr.s6_addr, 16);
207			memset(&pfr.rule.dst.addr.v.a.mask.addr8, 255, 16);
208			}
209			pfr.rule.dst.port_op = PF_OP_EQ;
210			pfr.rule.dst.port[0] = htons(d_port);
211			#ifdef notyet
212			pfr.rule.rule_flag = PFRULE_ONCE;
213			#endif
214			pfr.rule.action = PF_PASS;
215			pfr.rule.quick = 1;
216			pfr.rule.log = rule_log;
217			pfr.rule.keep_state = 1;
218			pfr.rule.flags = (proto == IPPROTO_TCP ? TH_SYN : 0);
219			pfr.rule.flagset = (proto == IPPROTO_TCP ?
220			(TH_SYN\|TH_ACK\|TH_FIN\|TH_RST) : 0);
221			#ifdef notyet
222			pfr.rule.max_states = 1;
223			#endif
224			if (qname != NULL)
225			strlcpy(pfr.rule.qname, qname, sizeof pfr.rule.qname);
226
227			return (0);
228			}