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	12820	vss_parse(char str, char addr, char *port)
66		{
67		char *p;
68
69	12820	addr = port = NULL;
70
71	12820	if (str[0] == '[') {
72		/* IPv6 address of the form [::1]:80 */
73	47	*addr = str + 1;
74	47	p = strchr(str, ']');
75	47	if (p == NULL)
76	1	return ("IPv6 address lacks ']'");
77	46	*p++ = '\0';
78	46	if (*p == '\0')
79	10	return (NULL);
80	36	if (p != ' ' && p != ':')
81	1	return ("IPv6 address has wrong port separator");
82	35	} else {
83		/*
84		* IPv4 address of the form 127.0.0.1:80, IPv6 address
85		* without port or non-numeric.
86		*/
87	12773	*addr = str;
88	12773	p = strchr(str, ' ');
89	12773	if (p == NULL)
90	10725	p = strchr(str, ':');
91	12773	if (p == NULL)
92	2323	return (NULL);
93	10450	if (p[0] == ':' && strchr(&p[1], ':'))
94	42	return (NULL);
95	10408	if (p == str)
96	1134	*addr = NULL;
97		}
98	10443	*p++ = '\0';
99	10443	*port = p;
100	10443	return (NULL);
101	12820	}
102
103		static const char *
104	999	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	999	errp = vss_parse(str, addr, port);
112	999	if (errp != NULL)
113	0	return (errp);
114	999	if (port == NULL \|\| *port == '-')
115	13	return (NULL);
116
117	986	l = strtoul(*port, &end, 10);
118	986	if (end[0] != '-' \|\| end[1] == '\0')
119	963	return (NULL);
120	23	if (strchr(end + 1, '-') != NULL)
121	2	return (NULL);
122	21	h = strtoul(end + 1, &end, 10);
123	21	if (end[0] != '\0')
124	3	return (NULL);
125
126		/* Port range of the form 80-81 */
127	18	if (l == 0)
128	1	return ("Range start cannot be 0");
129	17	if (h < l)
130	1	return ("Range start higher than range end");
131	16	if (h > 65535)
132	1	return ("Range end higher than 65535");
133
134	15	*lo = l;
135	15	*hi = h;
136	15	return (NULL);
137	999	}
138
139		static int
140	11821	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	11821	AN(addr);
148	11821	AN(res);
149	11821	AZ(*res);
150	11821	AN(errp);
151	11821	*errp = NULL;
152
153	11821	memset(&hints, 0, sizeof hints);
154	11821	hints.ai_family = family;
155	11821	hints.ai_socktype = socktype;
156	11821	hints.ai_flags = flags;
157
158	11821	p = strdup(addr);
159	11821	AN(p);
160	11821	*errp = vss_parse(p, &hp, &pp);
161	11821	if (*errp != NULL) {
162	2	free(p);
163	2	return (-1);
164		}
165	11819	if (pp != NULL)
166	9449	def_port = pp;
167	11819	ret = getaddrinfo(hp, def_port, &hints, res);
168	11819	free(p);
169
170	11819	if (ret == EAI_SYSTEM)
171	0	*errp = VAS_errtxt(errno);
172	11819	else if (ret != 0)
173	52	*errp = gai_strerror(ret);
174
175	11819	return (ret);
176	11821	}
177
178		static const struct suckaddr *
179	2183	vss_alloc_suckaddr(void dst, const struct addrinfo ai)
180		{
181
182	2183	AN(ai);
183	2183	if (dst == NULL)
184	2068	return (VSA_Malloc(ai->ai_addr, ai->ai_addrlen));
185
186	115	return (VSA_Build(dst, ai->ai_addr, ai->ai_addrlen));
187	2183	}
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	9604	VSS_resolver_socktype(const char addr, const char def_port,
198		vss_resolved_f func, void priv, const char **errp, int socktype)
199		{
200	9604	struct addrinfo res0 = NULL, res;
201		const struct suckaddr *vsa;
202		int ret;
203
204	9604	AN(addr);
205	9604	AN(func);
206	9604	AN(errp);
207
208	19208	ret = vss_resolve(addr, def_port, AF_UNSPEC, socktype, AI_PASSIVE,
209	9604	&res0, errp);
210	9604	if (ret != 0)
211	23	return (-1);
212
213	14855	for (res = res0; res != NULL; res = res->ai_next) {
214	10579	vsa = VSA_Malloc(res->ai_addr, res->ai_addrlen);
215	10579	if (vsa != NULL) {
216	10579	ret = func(priv, vsa);
217	10579	VSA_free(&vsa);
218	10579	if (ret)
219	5305	break;
220	5274	}
221	5274	}
222	9581	freeaddrinfo(res0);
223	9581	return (ret);
224	9604	}
225
226		int
227	9606	VSS_resolver(const char addr, const char def_port, vss_resolved_f *func,
228		void priv, const char *errp)
229		{
230	9606	return (VSS_resolver_socktype(
231	9606	addr, def_port, func, priv, errp, SOCK_STREAM));
232		}
233
234		int
235	999	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	999	unsigned long lo = 0, hi = 0, i;
240	999	int error = 0;
241
242	999	AN(addr);
243	999	AN(func);
244	999	AN(errp);
245
246	999	p = strdup(addr);
247	999	AN(p);
248	999	*errp = vss_parse_range(p, &hp, &pp, &lo, &hi);
249	999	if (*errp != NULL) {
250	3	free(p);
251	3	return (-1);
252		}
253
254	996	if (lo == 0) {
255		/* No port range (0 not allowed in range) */
256	981	free(p);
257	981	return (VSS_resolver(addr, def_port, func, priv, errp));
258		}
259
260		/* Undo vss_parse() string modifications */
261	15	memcpy(p, addr, pp - p);
262
263	44	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	29	sprintf(pp, "%lu", i);
269	29	error = VSS_resolver(p, def_port, func, priv, errp);
270	29	}
271	15	free(p);
272	15	return (error);
273	999	}
274
275		const struct suckaddr *
276	2126	VSS_ResolveOne(void dst, const char addr, const char *def_port,
277		int family, int socktype, int flags)
278		{
279	2126	struct addrinfo *res = NULL;
280	2126	const struct suckaddr *retval = NULL;
281		const char *err;
282		int ret;
283
284	2126	AN(addr);
285	2126	ret = vss_resolve(addr, def_port, family, socktype, flags, &res, &err);
286	2126	if (ret == 0 && res != NULL && res->ai_next == NULL) {
287	2107	AZ(err);
288	2107	retval = vss_alloc_suckaddr(dst, res);
289	2107	}
290	2126	if (res != NULL)
291	2107	freeaddrinfo(res);
292	2126	return (retval);
293		}
294
295		const struct suckaddr *
296	88	VSS_ResolveFirst(void dst, const char addr, const char *def_port,
297		int family, int socktype, int flags)
298		{
299	88	struct addrinfo res0 = NULL, res;
300	88	const struct suckaddr *retval = NULL;
301		const char *err;
302		int ret;
303
304	88	AN(addr);
305	88	ret = vss_resolve(addr, def_port, family, socktype, flags, &res0, &err);
306	88	if (ret == 0)
307	76	AZ(err);
308
309	89	for (res = res0; res != NULL; res = res->ai_next) {
310	76	retval = vss_alloc_suckaddr(dst, res);
311	76	if (retval != NULL)
312	75	break;
313	1	}
314	88	if (res0 != NULL)
315	76	freeaddrinfo(res0);
316	88	return (retval);
317		}