GCOV - Varnish Cache


/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006-2010 Varnish Software AS
 * All rights reserved.
 *
 * Author: Dag-Erling Smørgrav <des@des.no>
 * Author: Cecilie Fritzvold <cecilihf@linpro.no>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * 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 AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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 "config.h"

#include <sys/socket.h>

#include <netdb.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>

#include "vdef.h"

#include "vas.h"
#include "vsa.h"
#include "vss.h"

/*lint -esym(754, _storage) not ref */

/*
 * Take a string provided by the user and break it up into address and
 * port parts. The address and port separator may be either a colon or
 * a whitespace. Examples of acceptable input include:
 *
 * "localhost" - "localhost:80" - "localhost 80"
 * "127.0.0.1" - "127.0.0.1:80" - "127.0.0.1 80"
 * "0.0.0.0"   - "0.0.0.0:80"   - "0.0.0.0 80"
 * "[::1]"     - "[::1]:80"     - "[::1] 80"
 * "[::]"      - "[::]:80"      - "[::] 80"
 * "::1"       - "[::1]:80"     - "[::1] 80"
 *
 * See also RFC5952
 */

static const char *
vss_parse(char *str, char **addr, char **port)
{
        char *p;

        *addr = *port = NULL;

        if (str[0] == '[') {
                /* IPv6 address of the form [::1]:80 */
                *addr = str + 1;
                p = strchr(str, ']');
                if (p == NULL)
                        return ("IPv6 address lacks ']'");
                *p++ = '\0';
                if (*p == '\0')
                        return (NULL);
                if (*p != ' ' && *p != ':')
                        return ("IPv6 address has wrong port separator");
        } else {
                /*
                 * IPv4 address of the form 127.0.0.1:80, IPv6 address
                 * without port or non-numeric.
                 */
                *addr = str;
                p = strchr(str, ' ');
                if (p == NULL)
                        p = strchr(str, ':');
                if (p == NULL)
                        return (NULL);
                if (p[0] == ':' && strchr(&p[1], ':'))
                        return (NULL);
                if (p == str)
                        *addr = NULL;
        }
        *p++ = '\0';
        *port = p;
        return (NULL);
}

static const char *
vss_parse_range(char *str, char **addr, char **port, unsigned long *lo,
    unsigned long *hi)
{
        const char *errp;
        char *end;
        unsigned long l, h;

        errp = vss_parse(str, addr, port);
        if (errp != NULL)
                return (errp);
        if (*port == NULL || **port == '-')
                return (NULL);

        l = strtoul(*port, &end, 10);
        if (end[0] != '-' || end[1] == '\0')
                return (NULL);
        if (strchr(end + 1, '-') != NULL)
                return (NULL);
        h = strtoul(end + 1, &end, 10);
        if (end[0] != '\0')
                return (NULL);

        /* Port range of the form 80-81 */
        if (l == 0)
                return ("Range start cannot be 0");
        if (h < l)
                return ("Range start higher than range end");
        if (h > 65535)
                return ("Range end higher than 65535");

        *lo = l;
        *hi = h;
        return (NULL);
}

static int
vss_resolve(const char *addr, const char *def_port, int family, int socktype,
    int flags, struct addrinfo **res, const char **errp)
{
        struct addrinfo hints;
        char *p, *hp, *pp;
        int ret;

        AN(addr);
        AN(res);
        AZ(*res);
        AN(errp);
        *errp = NULL;

        memset(&hints, 0, sizeof hints);
        hints.ai_family = family;
        hints.ai_socktype = socktype;
        hints.ai_flags = flags;

        p = strdup(addr);
        AN(p);
        *errp = vss_parse(p, &hp, &pp);
        if (*errp != NULL) {
                free(p);
                return (-1);
        }
        if (pp != NULL)
                def_port = pp;
        ret = getaddrinfo(hp, def_port, &hints, res);
        free(p);

        if (ret == EAI_SYSTEM)
                *errp = VAS_errtxt(errno);
        else if (ret != 0)
                *errp = gai_strerror(ret);

        return (ret);
}

static const struct suckaddr *
vss_alloc_suckaddr(void *dst, const struct addrinfo *ai)
{

        AN(ai);
        if (dst == NULL)
                return (VSA_Malloc(ai->ai_addr, ai->ai_addrlen));

        return (VSA_Build(dst, ai->ai_addr, ai->ai_addrlen));
}

/*
 * Look up an address, using a default port if provided, and call
 * the callback function with the suckaddrs we find.
 * If the callback function returns anything but zero, we terminate
 * and pass that value.
 */

int
VSS_resolver_socktype(const char *addr, const char *def_port,
    vss_resolved_f *func, void *priv, const char **errp, int socktype)
{
        struct addrinfo *res0 = NULL, *res;
        const struct suckaddr *vsa;
        int ret;

        AN(addr);
        AN(func);
        AN(errp);

        ret = vss_resolve(addr, def_port, AF_UNSPEC, socktype, AI_PASSIVE,
            &res0, errp);
        if (ret != 0)
                return (-1);

        for (res = res0; res != NULL; res = res->ai_next) {
                vsa = VSA_Malloc(res->ai_addr, res->ai_addrlen);
                if (vsa != NULL) {
                        ret = func(priv, vsa);
                        VSA_free(&vsa);
                        if (ret)
                                break;
                }
        }
        freeaddrinfo(res0);
        return (ret);
}

int
VSS_resolver(const char *addr, const char *def_port, vss_resolved_f *func,
    void *priv, const char **errp)
{
        return (VSS_resolver_socktype(
            addr, def_port, func, priv, errp, SOCK_STREAM));
}

int
VSS_resolver_range(const char *addr, const char *def_port, vss_resolved_f *func,
    void *priv, const char **errp)
{
        char *p, *hp, *pp;
        unsigned long lo = 0, hi = 0, i;
        int error = 0;

        AN(addr);
        AN(func);
        AN(errp);

        p = strdup(addr);
        AN(p);
        *errp = vss_parse_range(p, &hp, &pp, &lo, &hi);
        if (*errp != NULL) {
                free(p);
                return (-1);
        }

        if (lo == 0) {
                /* No port range (0 not allowed in range) */
                free(p);
                return (VSS_resolver(addr, def_port, func, priv, errp));
        }

        /* Undo vss_parse() string modifications */
        memcpy(p, addr, pp - p);

        for (i = lo; i <= hi && !error; i++) {
                /* pp points to the first character of the range definition.
                 * The range definition includes the biggest port number, so the
                 * buffer must be big enough to fit each number individually.
                 */
                sprintf(pp, "%lu", i);
                error = VSS_resolver(p, def_port, func, priv, errp);
        }
        free(p);
        return (error);
}

const struct suckaddr *
VSS_ResolveOne(void *dst, const char *addr, const char *def_port,
    int family, int socktype, int flags)
{
        struct addrinfo *res = NULL;
        const struct suckaddr *retval = NULL;
        const char *err;
        int ret;

        AN(addr);
        ret = vss_resolve(addr, def_port, family, socktype, flags, &res, &err);
        if (ret == 0 && res != NULL && res->ai_next == NULL) {
                AZ(err);
                retval = vss_alloc_suckaddr(dst, res);
        }
        if (res != NULL)
                freeaddrinfo(res);
        return (retval);
}

const struct suckaddr *
VSS_ResolveFirst(void *dst, const char *addr, const char *def_port,
    int family, int socktype, int flags)
{
        struct addrinfo *res0 = NULL, *res;
        const struct suckaddr *retval = NULL;
        const char *err;
        int ret;

        AN(addr);
        ret = vss_resolve(addr, def_port, family, socktype, flags, &res0, &err);
        if (ret == 0)
                AZ(err);

        for (res = res0; res != NULL; res = res->ai_next) {
                retval = vss_alloc_suckaddr(dst, res);
                if (retval != NULL)
                        break;
        }
        if (res0 != NULL)
                freeaddrinfo(res0);
        return (retval);
}

		varnish-cache/lib/libvarnish/vss.c
0		/*-
1		* Copyright (c) 2006 Verdens Gang AS
2		* Copyright (c) 2006-2010 Varnish Software AS
3		* All rights reserved.
4		*
5		* Author: Dag-Erling Smørgrav <des@des.no>
6		* Author: Cecilie Fritzvold <cecilihf@linpro.no>
7		*
8		* SPDX-License-Identifier: BSD-2-Clause
9		*
10		* Redistribution and use in source and binary forms, with or without
11		* modification, are permitted provided that the following conditions
12		* are met:
13		* 1. Redistributions of source code must retain the above copyright
14		* notice, this list of conditions and the following disclaimer.
15		* 2. Redistributions in binary form must reproduce the above copyright
16		* notice, this list of conditions and the following disclaimer in the
17		* documentation and/or other materials provided with the distribution.
18		*
19		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
23		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29		* SUCH DAMAGE.
30		*/
31
32		#include "config.h"
33
34		#include <sys/socket.h>
35
36		#include <netdb.h>
37		#include <stdlib.h>
38		#include <string.h>
39		#include <stdio.h>
40
41		#include "vdef.h"
42
43		#include "vas.h"
44		#include "vsa.h"
45		#include "vss.h"
46
47		/lint -esym(754, _storage) not ref /
48
49		/*
50		* Take a string provided by the user and break it up into address and
51		* port parts. The address and port separator may be either a colon or
52		* a whitespace. Examples of acceptable input include:
53		*
54		* "localhost" - "localhost:80" - "localhost 80"
55		* "127.0.0.1" - "127.0.0.1:80" - "127.0.0.1 80"
56		* "0.0.0.0" - "0.0.0.0:80" - "0.0.0.0 80"
57		* "[::1]" - "[::1]:80" - "[::1] 80"
58		* "[::]" - "[::]:80" - "[::] 80"
59		* "::1" - "[::1]:80" - "[::1] 80"
60		*
61		* See also RFC5952
62		*/
63
64		static const char *
65	50446	vss_parse(char str, char addr, char *port)
66		{
67		char *p;
68
69	50446	addr = port = NULL;
70
71	50446	if (str[0] == '[') {
72		/* IPv6 address of the form [::1]:80 */
73	180	*addr = str + 1;
74	180	p = strchr(str, ']');
75	180	if (p == NULL)
76	4	return ("IPv6 address lacks ']'");
77	176	*p++ = '\0';
78	176	if (*p == '\0')
79	40	return (NULL);
80	136	if (p != ' ' && p != ':')
81	4	return ("IPv6 address has wrong port separator");
82	132	} else {
83		/*
84		* IPv4 address of the form 127.0.0.1:80, IPv6 address
85		* without port or non-numeric.
86		*/
87	50266	*addr = str;
88	50266	p = strchr(str, ' ');
89	50266	if (p == NULL)
90	42190	p = strchr(str, ':');
91	50266	if (p == NULL)
92	9130	return (NULL);
93	41136	if (p[0] == ':' && strchr(&p[1], ':'))
94	168	return (NULL);
95	40968	if (p == str)
96	4464	*addr = NULL;
97		}
98	41100	*p++ = '\0';
99	41100	*port = p;
100	41100	return (NULL);
101	50446	}
102
103		static const char *
104	3940	vss_parse_range(char str, char addr, char port, unsigned long lo,
105		unsigned long *hi)
106		{
107		const char *errp;
108		char *end;
109		unsigned long l, h;
110
111	3940	errp = vss_parse(str, addr, port);
112	3940	if (errp != NULL)
113	0	return (errp);
114	3940	if (port == NULL \|\| *port == '-')
115	52	return (NULL);
116
117	3888	l = strtoul(*port, &end, 10);
118	3888	if (end[0] != '-' \|\| end[1] == '\0')
119	3796	return (NULL);
120	92	if (strchr(end + 1, '-') != NULL)
121	8	return (NULL);
122	84	h = strtoul(end + 1, &end, 10);
123	84	if (end[0] != '\0')
124	12	return (NULL);
125
126		/* Port range of the form 80-81 */
127	72	if (l == 0)
128	4	return ("Range start cannot be 0");
129	68	if (h < l)
130	4	return ("Range start higher than range end");
131	64	if (h > 65535)
132	4	return ("Range end higher than 65535");
133
134	60	*lo = l;
135	60	*hi = h;
136	60	return (NULL);
137	3940	}
138
139		static int
140	46506	vss_resolve(const char addr, const char def_port, int family, int socktype,
141		int flags, struct addrinfo res, const char errp)
142		{
143		struct addrinfo hints;
144		char p, hp, *pp;
145		int ret;
146
147	46506	AN(addr);
148	46506	AN(res);
149	46506	AZ(*res);
150	46506	AN(errp);
151	46506	*errp = NULL;
152
153	46506	memset(&hints, 0, sizeof hints);
154	46506	hints.ai_family = family;
155	46506	hints.ai_socktype = socktype;
156	46506	hints.ai_flags = flags;
157
158	46506	p = strdup(addr);
159	46506	AN(p);
160	46506	*errp = vss_parse(p, &hp, &pp);
161	46506	if (*errp != NULL) {
162	8	free(p);
163	8	return (-1);
164		}
165	46498	if (pp != NULL)
166	37180	def_port = pp;
167	46498	ret = getaddrinfo(hp, def_port, &hints, res);
168	46498	free(p);
169
170	46498	if (ret == EAI_SYSTEM)
171	0	*errp = VAS_errtxt(errno);
172	46498	else if (ret != 0)
173	176	*errp = gai_strerror(ret);
174
175	46498	return (ret);
176	46506	}
177
178		static const struct suckaddr *
179	8582	vss_alloc_suckaddr(void dst, const struct addrinfo ai)
180		{
181
182	8582	AN(ai);
183	8582	if (dst == NULL)
184	8128	return (VSA_Malloc(ai->ai_addr, ai->ai_addrlen));
185
186	454	return (VSA_Build(dst, ai->ai_addr, ai->ai_addrlen));
187	8582	}
188
189		/*
190		* Look up an address, using a default port if provided, and call
191		* the callback function with the suckaddrs we find.
192		* If the callback function returns anything but zero, we terminate
193		* and pass that value.
194		*/
195
196		int
197	37824	VSS_resolver_socktype(const char addr, const char def_port,
198		vss_resolved_f func, void priv, const char **errp, int socktype)
199		{
200	37824	struct addrinfo res0 = NULL, res;
201		const struct suckaddr *vsa;
202		int ret;
203
204	37824	AN(addr);
205	37824	AN(func);
206	37824	AN(errp);
207
208	75648	ret = vss_resolve(addr, def_port, AF_UNSPEC, socktype, AI_PASSIVE,
209	37824	&res0, errp);
210	37824	if (ret != 0)
211	92	return (-1);
212
213	58512	for (res = res0; res != NULL; res = res->ai_next) {
214	41655	vsa = VSA_Malloc(res->ai_addr, res->ai_addrlen);
215	41655	if (vsa != NULL) {
216	41655	ret = func(priv, vsa);
217	41655	VSA_free(&vsa);
218	41655	if (ret)
219	20875	break;
220	20780	}
221	20780	}
222	37732	freeaddrinfo(res0);
223	37732	return (ret);
224	37824	}
225
226		int
227	37828	VSS_resolver(const char addr, const char def_port, vss_resolved_f *func,
228		void priv, const char *errp)
229		{
230	37828	return (VSS_resolver_socktype(
231	37828	addr, def_port, func, priv, errp, SOCK_STREAM));
232		}
233
234		int
235	3940	VSS_resolver_range(const char addr, const char def_port, vss_resolved_f *func,
236		void priv, const char *errp)
237		{
238		char p, hp, *pp;
239	3940	unsigned long lo = 0, hi = 0, i;
240	3940	int error = 0;
241
242	3940	AN(addr);
243	3940	AN(func);
244	3940	AN(errp);
245
246	3940	p = strdup(addr);
247	3940	AN(p);
248	3940	*errp = vss_parse_range(p, &hp, &pp, &lo, &hi);
249	3940	if (*errp != NULL) {
250	12	free(p);
251	12	return (-1);
252		}
253
254	3928	if (lo == 0) {
255		/* No port range (0 not allowed in range) */
256	3868	free(p);
257	3868	return (VSS_resolver(addr, def_port, func, priv, errp));
258		}
259
260		/* Undo vss_parse() string modifications */
261	60	memcpy(p, addr, pp - p);
262
263	176	for (i = lo; i <= hi && !error; i++) {
264		/* pp points to the first character of the range definition.
265		* The range definition includes the biggest port number, so the
266		* buffer must be big enough to fit each number individually.
267		*/
268	116	sprintf(pp, "%lu", i);
269	116	error = VSS_resolver(p, def_port, func, priv, errp);
270	116	}
271	60	free(p);
272	60	return (error);
273	3940	}
274
275		const struct suckaddr *
276	8322	VSS_ResolveOne(void dst, const char addr, const char *def_port,
277		int family, int socktype, int flags)
278		{
279	8322	struct addrinfo *res = NULL;
280	8322	const struct suckaddr *retval = NULL;
281		const char *err;
282		int ret;
283
284	8322	AN(addr);
285	8322	ret = vss_resolve(addr, def_port, family, socktype, flags, &res, &err);
286	8322	if (ret == 0 && res != NULL && res->ai_next == NULL) {
287	8278	AZ(err);
288	8278	retval = vss_alloc_suckaddr(dst, res);
289	8278	}
290	8322	if (res != NULL)
291	8278	freeaddrinfo(res);
292	8322	return (retval);
293		}
294
295		const struct suckaddr *
296	352	VSS_ResolveFirst(void dst, const char addr, const char *def_port,
297		int family, int socktype, int flags)
298		{
299	352	struct addrinfo res0 = NULL, res;
300	352	const struct suckaddr *retval = NULL;
301		const char *err;
302		int ret;
303
304	352	AN(addr);
305	352	ret = vss_resolve(addr, def_port, family, socktype, flags, &res0, &err);
306	352	if (ret == 0)
307	304	AZ(err);
308
309	356	for (res = res0; res != NULL; res = res->ai_next) {
310	304	retval = vss_alloc_suckaddr(dst, res);
311	304	if (retval != NULL)
312	300	break;
313	4	}
314	352	if (res0 != NULL)
315	304	freeaddrinfo(res0);
316	352	return (retval);
317		}