GCOV - Varnish Cache


/*-
 * Copyright (c) 2008-2010 Varnish Software AS
 * All rights reserved.
 *
 * Author: Frédéric Lécaille <flecaille@haproxy.com>
 *
 * 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/types.h>
#include <sys/socket.h>

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

#include "vtc.h"

#include "vsa.h"
#include "vss.h"
#include "vtcp.h"
#include "vre.h"

struct syslog_srv {
        unsigned                        magic;
#define SYSLOG_SRV_MAGIC                0xbf28a692
        char                            *name;
        struct vtclog                   *vl;
        VTAILQ_ENTRY(syslog_srv)        list;
        char                            run;

        int                             repeat;
        char                            *spec;

        int                             sock;
        char                            bind[256];
        int                             lvl;

        pthread_t                       tp;
        ssize_t                         rxbuf_left;
        size_t                          rxbuf_sz;
        char                            *rxbuf;
        vtim_dur                        timeout;
};

static pthread_mutex_t                  syslog_mtx;

static VTAILQ_HEAD(, syslog_srv)        syslogs =
    VTAILQ_HEAD_INITIALIZER(syslogs);

#define SYSLOGCMDS \
        CMD_SYSLOG(expect) \
        CMD_SYSLOG(recv)

#define CMD_SYSLOG(nm) static cmd_f cmd_syslog_##nm;
SYSLOGCMDS
#undef CMD_SYSLOG

static const struct cmds syslog_cmds[] = {
#define CMD_SYSLOG(n) { #n, cmd_syslog_##n },
SYSLOGCMDS
#undef CMD_SYSLOG
        { NULL, NULL }
};

static const char * const syslog_levels[] = {
        "emerg",
        "alert",
        "crit",
        "err",
        "warning",
        "notice",
        "info",
        "debug",
        NULL,
};

static int
get_syslog_level(struct vtclog *vl, const char *lvl)
{
        int i;

        for (i = 0; syslog_levels[i]; i++)
                if (!strcmp(lvl, syslog_levels[i]))
                        return (i);
        vtc_fatal(vl, "wrong syslog level '%s'\n", lvl);
}

/*--------------------------------------------------------------------
 * Check if a UDP syscall return value is fatal
 * XXX: Largely copied from VTCP, not sure if really applicable
 */

static int
VUDP_Check(int a)
{
        if (a == 0)
                return (1);
        if (errno == ECONNRESET)
                return (1);
#if (defined (__SVR4) && defined (__sun)) || defined (__NetBSD__)
        /*
         * Solaris returns EINVAL if the other end unexpectedly reset the
         * connection.
         * This is a bug in Solaris and documented behaviour on NetBSD.
         */
        if (errno == EINVAL || errno == ETIMEDOUT || errno == EPIPE)
                return (1);
#elif defined (__APPLE__)
        /*
         * macOS returns EINVAL if the other end unexpectedly reset
         * the connection.
         */
        if (errno == EINVAL)
                return (1);
#endif
        return (0);
}

/*--------------------------------------------------------------------
 * When closing a UDP connection, a couple of errno's are legit, we
 * can't be held responsible for the other end wanting to talk to us.
 */

static void
VUDP_close(int *s)
{
        int i;

        i = close(*s);

        assert(VUDP_Check(i));
        *s = -1;
}

/*--------------------------------------------------------------------
 * Given a struct suckaddr, open a socket of the appropriate type, and bind
 * it to the requested address.
 *
 * If the address is an IPv6 address, the IPV6_V6ONLY option is set to
 * avoid conflicts between INADDR_ANY and IN6ADDR_ANY.
 */

static int
VUDP_bind(const struct suckaddr *sa, const char **errp)
{
#ifdef IPV6_V6ONLY
        int val;
#endif
        int sd, e;
        socklen_t sl;
        const struct sockaddr *so;
        int proto;

        if (errp != NULL)
                *errp = NULL;

        proto = VSA_Get_Proto(sa);
        sd = socket(proto, SOCK_DGRAM, 0);
        if (sd < 0) {
                if (errp != NULL)
                        *errp = "socket(2)";
                return (-1);
        }

#ifdef IPV6_V6ONLY
        /* forcibly use separate sockets for IPv4 and IPv6 */
        val = 1;
        if (proto == AF_INET6 &&
            setsockopt(sd, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof val) != 0) {
                if (errp != NULL)
                        *errp = "setsockopt(IPV6_V6ONLY, 1)";
                e = errno;
                closefd(&sd);
                errno = e;
                return (-1);
        }
#endif
        so = VSA_Get_Sockaddr(sa, &sl);
        if (bind(sd, so, sl) != 0) {
                if (errp != NULL)
                        *errp = "bind(2)";
                e = errno;
                closefd(&sd);
                errno = e;
                return (-1);
        }
        return (sd);
}

/*--------------------------------------------------------------------*/

struct udp_helper {
        const char      **errp;
};

static int v_matchproto_(vss_resolved_f)
vudp_lo_cb(void *priv, const struct suckaddr *sa)
{
        int sock;
        struct udp_helper *hp = priv;

        sock = VUDP_bind(sa, hp->errp);
        if (sock > 0) {
                *hp->errp = NULL;
                return (sock);
        }
        AN(*hp->errp);
        return (0);
}

static int
VUDP_bind_on(const char *addr, const char *def_port, const char **errp)
{
        struct udp_helper h;
        int sock;

        h.errp = errp;

        sock = VSS_resolver_socktype(
            addr, def_port, vudp_lo_cb, &h, errp, SOCK_DGRAM);
        if (*errp != NULL)
                return (-1);
        return (sock);
}

/**********************************************************************
 * Allocate and initialize a syslog
 */

static struct syslog_srv *
syslog_new(const char *name, struct vtclog *vl)
{
        struct syslog_srv *s;

        VTC_CHECK_NAME(vl, name, "Syslog", 'S');
        ALLOC_OBJ(s, SYSLOG_SRV_MAGIC);
        AN(s);
        REPLACE(s->name, name);
        s->vl = vtc_logopen("%s", s->name);
        AN(s->vl);
        vtc_log_set_cmd(s->vl, syslog_cmds);

        bprintf(s->bind, "%s", default_listen_addr);
        s->repeat = 1;
        s->sock = -1;
        s->lvl = -1;
        s->timeout = vtc_maxdur * .5;           // XXX

        vl = vtc_logopen("%s", s->name);
        AN(vl);

        s->rxbuf_sz = s->rxbuf_left = 2048*1024;
        s->rxbuf = malloc(s->rxbuf_sz);         /* XXX */
        AN(s->rxbuf);

        PTOK(pthread_mutex_lock(&syslog_mtx));
        VTAILQ_INSERT_TAIL(&syslogs, s, list);
        PTOK(pthread_mutex_unlock(&syslog_mtx));
        return (s);
}

/**********************************************************************
 * Clean up a syslog
 */

static void
syslog_delete(struct syslog_srv *s)
{

        CHECK_OBJ_NOTNULL(s, SYSLOG_SRV_MAGIC);
        macro_undef(s->vl, s->name, "addr");
        macro_undef(s->vl, s->name, "port");
        macro_undef(s->vl, s->name, "sock");
        vtc_logclose(s->vl);
        free(s->name);
        free(s->rxbuf);
        /* XXX: MEMLEAK (?) (VSS ??) */
        FREE_OBJ(s);
}

static void
syslog_rx(const struct syslog_srv *s, int lvl)
{
        ssize_t ret;

        while (!vtc_error) {
                /* Pointers to syslog priority value (see <PRIVAL>, rfc5424). */
                char *prib, *prie, *end;
                unsigned int prival;

                VTCP_set_read_timeout(s->sock, s->timeout);

                ret = recv(s->sock, s->rxbuf, s->rxbuf_sz - 1, 0);
                if (ret < 0) {
                        if (errno == EINTR || errno == EAGAIN)
                                continue;

                        vtc_fatal(s->vl,
                            "%s: recv failed (fd: %d read: %s", __func__,
                            s->sock, strerror(errno));
                }
                if (ret == 0)
                        vtc_fatal(s->vl,
                            "syslog rx timeout (fd: %d %.3fs ret: %zd)",
                            s->sock, s->timeout, ret);

                s->rxbuf[ret] = '\0';
                vtc_dump(s->vl, 4, "syslog", s->rxbuf, ret);

                prib = s->rxbuf;
                if (*prib++ != '<')
                        vtc_fatal(s->vl, "syslog PRI, no '<'");
                prie = strchr(prib, '>');
                if (prie == NULL)
                        vtc_fatal(s->vl, "syslog PRI, no '>'");

                prival = strtoul(prib, &end, 10);
                if (end != prie)
                        vtc_fatal(s->vl, "syslog PRI, bad number");

                if (lvl >= 0 && lvl == (prival & 0x7))
                        return;
        }
}

/**********************************************************************
 * Syslog server bind
 */

static void
syslog_bind(struct syslog_srv *s)
{
        const char *err;
        char aaddr[VTCP_ADDRBUFSIZE];
        char aport[VTCP_PORTBUFSIZE];
        char buf[vsa_suckaddr_len];
        const struct suckaddr *sua;

        CHECK_OBJ_NOTNULL(s, SYSLOG_SRV_MAGIC);

        if (s->sock >= 0)
                VUDP_close(&s->sock);
        s->sock = VUDP_bind_on(s->bind, "0", &err);
        if (err != NULL)
                vtc_fatal(s->vl,
                    "Syslog server bind address (%s) cannot be resolved: %s",
                    s->bind, err);
        assert(s->sock > 0);
        sua = VSA_getsockname(s->sock, buf, sizeof buf);
        AN(sua);
        VTCP_name(sua, aaddr, sizeof aaddr, aport, sizeof aport);
        macro_def(s->vl, s->name, "addr", "%s", aaddr);
        macro_def(s->vl, s->name, "port", "%s", aport);
        if (VSA_Get_Proto(sua) == AF_INET)
                macro_def(s->vl, s->name, "sock", "%s:%s", aaddr, aport);
        else
                macro_def(s->vl, s->name, "sock", "[%s]:%s", aaddr, aport);
        /* Record the actual port, and reuse it on subsequent starts */
        bprintf(s->bind, "%s %s", aaddr, aport);
}

static void v_matchproto_(cmd_f)
cmd_syslog_expect(CMD_ARGS)
{
        struct syslog_srv *s;
        struct vsb vsb[1];
        vre_t *vre;
        int error, erroroffset, i, ret;
        char *cmp, *spec, errbuf[VRE_ERROR_LEN];

        (void)vl;
        CAST_OBJ_NOTNULL(s, priv, SYSLOG_SRV_MAGIC);
        AZ(strcmp(av[0], "expect"));
        av++;

        cmp = av[0];
        spec = av[1];
        AN(cmp);
        AN(spec);
        AZ(av[2]);

        assert(!strcmp(cmp, "~") || !strcmp(cmp, "!~"));

        vre = VRE_compile(spec, 0, &error, &erroroffset, 1);
        if (vre == NULL) {
                AN(VSB_init(vsb, errbuf, sizeof errbuf));
                AZ(VRE_error(vsb, error));
                AZ(VSB_finish(vsb));
                VSB_fini(vsb);
                vtc_fatal(s->vl, "REGEXP error: '%s' (@%d) (%s)",
                    errbuf, erroroffset, spec);
        }

        i = VRE_match(vre, s->rxbuf, 0, 0, NULL);

        VRE_free(&vre);

        ret = (i >= 0 && *cmp == '~') || (i < 0 && *cmp == '!');
        if (!ret)
                vtc_fatal(s->vl, "EXPECT FAILED %s \"%s\"", cmp, spec);
        else
                vtc_log(s->vl, 4, "EXPECT MATCH %s \"%s\"", cmp, spec);
}

static void v_matchproto_(cmd_f)
cmd_syslog_recv(CMD_ARGS)
{
        int lvl;
        struct syslog_srv *s;

        CAST_OBJ_NOTNULL(s, priv, SYSLOG_SRV_MAGIC);
        (void)vl;
        AZ(strcmp(av[0], "recv"));
        av++;
        if (av[0] == NULL)
                lvl = s->lvl;
        else
                lvl = get_syslog_level(vl, av[0]);

        syslog_rx(s, lvl);
}

/**********************************************************************
 * Syslog server thread
 */

static void *
syslog_thread(void *priv)
{
        struct syslog_srv *s;
        int i;

        CAST_OBJ_NOTNULL(s, priv, SYSLOG_SRV_MAGIC);
        assert(s->sock >= 0);

        vtc_log(s->vl, 2, "Started on %s (level: %d)", s->bind, s->lvl);
        for (i = 0; i < s->repeat; i++) {
                if (s->repeat > 1)
                        vtc_log(s->vl, 3, "Iteration %d", i);
                parse_string(s->vl, s, s->spec);
                vtc_log(s->vl, 3, "shutting fd %d", s->sock);
        }
        VUDP_close(&s->sock);
        vtc_log(s->vl, 2, "Ending");
        return (NULL);
}

/**********************************************************************
 * Start the syslog thread
 */

static void
syslog_start(struct syslog_srv *s)
{
        CHECK_OBJ_NOTNULL(s, SYSLOG_SRV_MAGIC);
        vtc_log(s->vl, 2, "Starting syslog server");
        if (s->sock == -1)
                syslog_bind(s);
        vtc_log(s->vl, 1, "Bound on %s", s->bind);
        s->run = 1;
        PTOK(pthread_create(&s->tp, NULL, syslog_thread, s));
}

/**********************************************************************
 * Force stop the syslog thread
 */

static void
syslog_stop(struct syslog_srv *s)
{
        void *res;

        CHECK_OBJ_NOTNULL(s, SYSLOG_SRV_MAGIC);
        vtc_log(s->vl, 2, "Stopping for syslog server");
        (void)pthread_cancel(s->tp);
        PTOK(pthread_join(s->tp, &res));
        s->tp = 0;
        s->run = 0;
}

/**********************************************************************
 * Wait for syslog thread to stop
 */

static void
syslog_wait(struct syslog_srv *s)
{
        void *res;

        CHECK_OBJ_NOTNULL(s, SYSLOG_SRV_MAGIC);
        vtc_log(s->vl, 2, "Waiting for syslog server (%d)", s->sock);
        PTOK(pthread_join(s->tp, &res));
        if (res != NULL && !vtc_stop)
                vtc_fatal(s->vl, "Syslog server returned \"%p\"",
                    (char *)res);
        s->tp = 0;
        s->run = 0;
}

/* SECTION: syslog syslog
 *
 * Define and interact with syslog instances (for use with haproxy)
 *
 * To define a syslog server, you'll use this syntax::
 *
 *     syslog SNAME
 *
 * Arguments:
 *
 * SNAME
 *     Identify the syslog server with a string which must start with 'S'.
 *
 * \-level STRING
 *         Set the default syslog priority level used by any subsequent "recv"
 *         command.
 *         Any syslog dgram with a different level will be skipped by
 *         "recv" command. This default level value may be superseded
 *         by "recv" command if supplied as first argument: "recv <level>".
 *
 * \-start
 *         Start the syslog server thread in the background.
 *
 * \-repeat
 *         Instead of processing the specification only once, do it
 *         NUMBER times.
 *
 * \-bind
 *         Bind the syslog socket to a local address.
 *
 * \-wait
 *         Wait for that thread to terminate.
 *
 * \-stop
 *         Stop the syslog server thread.
 */

void v_matchproto_(cmd_f)
cmd_syslog(CMD_ARGS)
{
        struct syslog_srv *s;

        (void)priv;

        if (av == NULL) {
                /* Reset and free */
                do {
                        PTOK(pthread_mutex_lock(&syslog_mtx));
                        s = VTAILQ_FIRST(&syslogs);
                        CHECK_OBJ_ORNULL(s, SYSLOG_SRV_MAGIC);
                        if (s != NULL)
                                VTAILQ_REMOVE(&syslogs, s, list);
                        PTOK(pthread_mutex_unlock(&syslog_mtx));
                        if (s != NULL) {
                                if (s->run) {
                                        (void)pthread_cancel(s->tp);
                                        syslog_wait(s);
                                }
                                if (s->sock >= 0)
                                        VUDP_close(&s->sock);
                                syslog_delete(s);
                        }
                } while (s != NULL);
                return;
        }

        AZ(strcmp(av[0], "syslog"));
        av++;

        PTOK(pthread_mutex_lock(&syslog_mtx));
        VTAILQ_FOREACH(s, &syslogs, list)
                if (!strcmp(s->name, av[0]))
                        break;
        PTOK(pthread_mutex_unlock(&syslog_mtx));
        if (s == NULL)
                s = syslog_new(av[0], vl);
        CHECK_OBJ_NOTNULL(s, SYSLOG_SRV_MAGIC);
        av++;

        for (; *av != NULL; av++) {
                if (vtc_error)
                        break;
                if (!strcmp(*av, "-wait")) {
                        if (!s->run)
                                vtc_fatal(s->vl, "Syslog server not -started");
                        syslog_wait(s);
                        continue;
                }

                if (!strcmp(*av, "-stop")) {
                        syslog_stop(s);
                        continue;
                }

                /*
                 * We do an implicit -wait if people muck about with a
                 * running syslog.
                 * This only works if the previous ->spec has completed
                 */
                if (s->run)
                        syslog_wait(s);

                AZ(s->run);
                if (!strcmp(*av, "-repeat")) {
                        AN(av[1]);
                        s->repeat = atoi(av[1]);
                        av++;
                        continue;
                }
                if (!strcmp(*av, "-bind")) {
                        AN(av[1]);
                        bprintf(s->bind, "%s", av[1]);
                        av++;
                        syslog_bind(s);
                        continue;
                }
                if (!strcmp(*av, "-level")) {
                        AN(av[1]);
                        s->lvl = get_syslog_level(vl, av[1]);
                        av++;
                        continue;
                }
                if (!strcmp(*av, "-start")) {
                        syslog_start(s);
                        continue;
                }
                if (**av == '-')
                        vtc_fatal(s->vl, "Unknown syslog argument: %s", *av);
                s->spec = *av;
        }
}

void
init_syslog(void)
{
        PTOK(pthread_mutex_init(&syslog_mtx, NULL));
}

		varnish-cache/bin/varnishtest/vtc_syslog.c
0		/*-
1		* Copyright (c) 2008-2010 Varnish Software AS
2		* All rights reserved.
3		*
4		* Author: Frédéric Lécaille <flecaille@haproxy.com>
5		*
6		* SPDX-License-Identifier: BSD-2-Clause
7		*
8		* Redistribution and use in source and binary forms, with or without
9		* modification, are permitted provided that the following conditions
10		* are met:
11		* 1. Redistributions of source code must retain the above copyright
12		* notice, this list of conditions and the following disclaimer.
13		* 2. Redistributions in binary form must reproduce the above copyright
14		* notice, this list of conditions and the following disclaimer in the
15		* documentation and/or other materials provided with the distribution.
16		*
17		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
21		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27		* SUCH DAMAGE.
28		*/
29
30		#include "config.h"
31
32		#include <sys/types.h>
33		#include <sys/socket.h>
34
35		#include <stdio.h>
36		#include <stdlib.h>
37		#include <string.h>
38		#include <unistd.h>
39
40		#include "vtc.h"
41
42		#include "vsa.h"
43		#include "vss.h"
44		#include "vtcp.h"
45		#include "vre.h"
46
47		struct syslog_srv {
48		unsigned magic;
49		#define SYSLOG_SRV_MAGIC 0xbf28a692
50		char *name;
51		struct vtclog *vl;
52		VTAILQ_ENTRY(syslog_srv) list;
53		char run;
54
55		int repeat;
56		char *spec;
57
58		int sock;
59		char bind[256];
60		int lvl;
61
62		pthread_t tp;
63		ssize_t rxbuf_left;
64		size_t rxbuf_sz;
65		char *rxbuf;
66		vtim_dur timeout;
67		};
68
69		static pthread_mutex_t syslog_mtx;
70
71		static VTAILQ_HEAD(, syslog_srv) syslogs =
72		VTAILQ_HEAD_INITIALIZER(syslogs);
73
74		#define SYSLOGCMDS \
75		CMD_SYSLOG(expect) \
76		CMD_SYSLOG(recv)
77
78		#define CMD_SYSLOG(nm) static cmd_f cmd_syslog_##nm;
79		SYSLOGCMDS
80		#undef CMD_SYSLOG
81
82		static const struct cmds syslog_cmds[] = {
83		#define CMD_SYSLOG(n) { #n, cmd_syslog_##n },
84		SYSLOGCMDS
85		#undef CMD_SYSLOG
86		{ NULL, NULL }
87		};
88
89		static const char * const syslog_levels[] = {
90		"emerg",
91		"alert",
92		"crit",
93		"err",
94		"warning",
95		"notice",
96		"info",
97		"debug",
98		NULL,
99		};
100
101		static int
102	80	get_syslog_level(struct vtclog vl, const char lvl)
103		{
104		int i;
105
106	520	for (i = 0; syslog_levels[i]; i++)
107	520	if (!strcmp(lvl, syslog_levels[i]))
108	80	return (i);
109	0	vtc_fatal(vl, "wrong syslog level '%s'\n", lvl);
110		}
111
112		/*--------------------------------------------------------------------
113		* Check if a UDP syscall return value is fatal
114		* XXX: Largely copied from VTCP, not sure if really applicable
115		*/
116
117		static int
118	40	VUDP_Check(int a)
119		{
120	40	if (a == 0)
121	40	return (1);
122	0	if (errno == ECONNRESET)
123	0	return (1);
124		#if (defined (__SVR4) && defined (__sun)) \|\| defined (__NetBSD__)
125		/*
126		* Solaris returns EINVAL if the other end unexpectedly reset the
127		* connection.
128		* This is a bug in Solaris and documented behaviour on NetBSD.
129		*/
130		if (errno == EINVAL \|\| errno == ETIMEDOUT \|\| errno == EPIPE)
131		return (1);
132		#elif defined (__APPLE__)
133		/*
134		* macOS returns EINVAL if the other end unexpectedly reset
135		* the connection.
136		*/
137		if (errno == EINVAL)
138		return (1);
139		#endif
140	0	return (0);
141	40	}
142
143		/*--------------------------------------------------------------------
144		* When closing a UDP connection, a couple of errno's are legit, we
145		* can't be held responsible for the other end wanting to talk to us.
146		*/
147
148		static void
149	40	VUDP_close(int *s)
150		{
151		int i;
152
153	40	i = close(*s);
154
155	40	assert(VUDP_Check(i));
156	40	*s = -1;
157	40	}
158
159		/*--------------------------------------------------------------------
160		* Given a struct suckaddr, open a socket of the appropriate type, and bind
161		* it to the requested address.
162		*
163		* If the address is an IPv6 address, the IPV6_V6ONLY option is set to
164		* avoid conflicts between INADDR_ANY and IN6ADDR_ANY.
165		*/
166
167		static int
168	40	VUDP_bind(const struct suckaddr sa, const char *errp)
169		{
170		#ifdef IPV6_V6ONLY
171		int val;
172		#endif
173		int sd, e;
174		socklen_t sl;
175		const struct sockaddr *so;
176		int proto;
177
178	40	if (errp != NULL)
179	40	*errp = NULL;
180
181	40	proto = VSA_Get_Proto(sa);
182	40	sd = socket(proto, SOCK_DGRAM, 0);
183	40	if (sd < 0) {
184	0	if (errp != NULL)
185	0	*errp = "socket(2)";
186	0	return (-1);
187		}
188
189		#ifdef IPV6_V6ONLY
190		/* forcibly use separate sockets for IPv4 and IPv6 */
191		val = 1;
192		if (proto == AF_INET6 &&
193		setsockopt(sd, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof val) != 0) {
194		if (errp != NULL)
195		*errp = "setsockopt(IPV6_V6ONLY, 1)";
196		e = errno;
197		closefd(&sd);
198		errno = e;
199		return (-1);
200		}
201		#endif
202	40	so = VSA_Get_Sockaddr(sa, &sl);
203	40	if (bind(sd, so, sl) != 0) {
204	0	if (errp != NULL)
205	0	*errp = "bind(2)";
206	0	e = errno;
207	0	closefd(&sd);
208	0	errno = e;
209	0	return (-1);
210		}
211	40	return (sd);
212	40	}
213
214		/--------------------------------------------------------------------/
215
216		struct udp_helper {
217		const char **errp;
218		};
219
220		static int v_matchproto_(vss_resolved_f)
221	40	vudp_lo_cb(void priv, const struct suckaddr sa)
222		{
223		int sock;
224	40	struct udp_helper *hp = priv;
225
226	40	sock = VUDP_bind(sa, hp->errp);
227	40	if (sock > 0) {
228	40	*hp->errp = NULL;
229	40	return (sock);
230		}
231	0	AN(*hp->errp);
232	0	return (0);
233	40	}
234
235		static int
236	40	VUDP_bind_on(const char addr, const char def_port, const char **errp)
237		{
238		struct udp_helper h;
239		int sock;
240
241	40	h.errp = errp;
242
243	40	sock = VSS_resolver_socktype(
244	40	addr, def_port, vudp_lo_cb, &h, errp, SOCK_DGRAM);
245	40	if (*errp != NULL)
246	0	return (-1);
247	40	return (sock);
248	40	}
249
250		/**********************************************************************
251		* Allocate and initialize a syslog
252		*/
253
254		static struct syslog_srv *
255	40	syslog_new(const char name, struct vtclog vl)
256		{
257		struct syslog_srv *s;
258
259	40	VTC_CHECK_NAME(vl, name, "Syslog", 'S');
260	40	ALLOC_OBJ(s, SYSLOG_SRV_MAGIC);
261	40	AN(s);
262	40	REPLACE(s->name, name);
263	40	s->vl = vtc_logopen("%s", s->name);
264	40	AN(s->vl);
265	40	vtc_log_set_cmd(s->vl, syslog_cmds);
266
267	40	bprintf(s->bind, "%s", default_listen_addr);
268	40	s->repeat = 1;
269	40	s->sock = -1;
270	40	s->lvl = -1;
271	40	s->timeout = vtc_maxdur * .5; // XXX
272
273	40	vl = vtc_logopen("%s", s->name);
274	40	AN(vl);
275
276	40	s->rxbuf_sz = s->rxbuf_left = 2048*1024;
277	40	s->rxbuf = malloc(s->rxbuf_sz); /* XXX */
278	40	AN(s->rxbuf);
279
280	40	PTOK(pthread_mutex_lock(&syslog_mtx));
281	40	VTAILQ_INSERT_TAIL(&syslogs, s, list);
282	40	PTOK(pthread_mutex_unlock(&syslog_mtx));
283	40	return (s);
284		}
285
286		/**********************************************************************
287		* Clean up a syslog
288		*/
289
290		static void
291	40	syslog_delete(struct syslog_srv *s)
292		{
293
294	40	CHECK_OBJ_NOTNULL(s, SYSLOG_SRV_MAGIC);
295	40	macro_undef(s->vl, s->name, "addr");
296	40	macro_undef(s->vl, s->name, "port");
297	40	macro_undef(s->vl, s->name, "sock");
298	40	vtc_logclose(s->vl);
299	40	free(s->name);
300	40	free(s->rxbuf);
301		/* XXX: MEMLEAK (?) (VSS ??) */
302	40	FREE_OBJ(s);
303	40	}
304
305		static void
306	40	syslog_rx(const struct syslog_srv *s, int lvl)
307		{
308		ssize_t ret;
309
310	40	while (!vtc_error) {
311		/* Pointers to syslog priority value (see <PRIVAL>, rfc5424). */
312		char prib, prie, *end;
313		unsigned int prival;
314
315	40	VTCP_set_read_timeout(s->sock, s->timeout);
316
317	40	ret = recv(s->sock, s->rxbuf, s->rxbuf_sz - 1, 0);
318	40	if (ret < 0) {
319	0	if (errno == EINTR \|\| errno == EAGAIN)
320	0	continue;
321
322	0	vtc_fatal(s->vl,
323		"%s: recv failed (fd: %d read: %s", __func__,
324	0	s->sock, strerror(errno));
325		}
326	40	if (ret == 0)
327	0	vtc_fatal(s->vl,
328		"syslog rx timeout (fd: %d %.3fs ret: %zd)",
329	0	s->sock, s->timeout, ret);
330
331	40	s->rxbuf[ret] = '\0';
332	40	vtc_dump(s->vl, 4, "syslog", s->rxbuf, ret);
333
334	40	prib = s->rxbuf;
335	40	if (*prib++ != '<')
336	0	vtc_fatal(s->vl, "syslog PRI, no '<'");
337	40	prie = strchr(prib, '>');
338	40	if (prie == NULL)
339	0	vtc_fatal(s->vl, "syslog PRI, no '>'");
340
341	40	prival = strtoul(prib, &end, 10);
342	40	if (end != prie)
343	0	vtc_fatal(s->vl, "syslog PRI, bad number");
344
345	40	if (lvl >= 0 && lvl == (prival & 0x7))
346	40	return;
347		}
348	40	}
349
350		/**********************************************************************
351		* Syslog server bind
352		*/
353
354		static void
355	40	syslog_bind(struct syslog_srv *s)
356		{
357		const char *err;
358		char aaddr[VTCP_ADDRBUFSIZE];
359		char aport[VTCP_PORTBUFSIZE];
360	40	char buf[vsa_suckaddr_len];
361		const struct suckaddr *sua;
362
363	40	CHECK_OBJ_NOTNULL(s, SYSLOG_SRV_MAGIC);
364
365	40	if (s->sock >= 0)
366	0	VUDP_close(&s->sock);
367	40	s->sock = VUDP_bind_on(s->bind, "0", &err);
368	40	if (err != NULL)
369	0	vtc_fatal(s->vl,
370		"Syslog server bind address (%s) cannot be resolved: %s",
371	0	s->bind, err);
372	40	assert(s->sock > 0);
373	40	sua = VSA_getsockname(s->sock, buf, sizeof buf);
374	40	AN(sua);
375	40	VTCP_name(sua, aaddr, sizeof aaddr, aport, sizeof aport);
376	40	macro_def(s->vl, s->name, "addr", "%s", aaddr);
377	40	macro_def(s->vl, s->name, "port", "%s", aport);
378	40	if (VSA_Get_Proto(sua) == AF_INET)
379	40	macro_def(s->vl, s->name, "sock", "%s:%s", aaddr, aport);
380		else
381	0	macro_def(s->vl, s->name, "sock", "[%s]:%s", aaddr, aport);
382		/* Record the actual port, and reuse it on subsequent starts */
383	40	bprintf(s->bind, "%s %s", aaddr, aport);
384	40	}
385
386		static void v_matchproto_(cmd_f)
387	40	cmd_syslog_expect(CMD_ARGS)
388		{
389		struct syslog_srv *s;
390		struct vsb vsb[1];
391		vre_t *vre;
392		int error, erroroffset, i, ret;
393		char cmp, spec, errbuf[VRE_ERROR_LEN];
394
395	40	(void)vl;
396	40	CAST_OBJ_NOTNULL(s, priv, SYSLOG_SRV_MAGIC);
397	40	AZ(strcmp(av[0], "expect"));
398	40	av++;
399
400	40	cmp = av[0];
401	40	spec = av[1];
402	40	AN(cmp);
403	40	AN(spec);
404	40	AZ(av[2]);
405
406	40	assert(!strcmp(cmp, "~") \|\| !strcmp(cmp, "!~"));
407
408	40	vre = VRE_compile(spec, 0, &error, &erroroffset, 1);
409	40	if (vre == NULL) {
410	0	AN(VSB_init(vsb, errbuf, sizeof errbuf));
411	0	AZ(VRE_error(vsb, error));
412	0	AZ(VSB_finish(vsb));
413	0	VSB_fini(vsb);
414	0	vtc_fatal(s->vl, "REGEXP error: '%s' (@%d) (%s)",
415	0	errbuf, erroroffset, spec);
416		}
417
418	40	i = VRE_match(vre, s->rxbuf, 0, 0, NULL);
419
420	40	VRE_free(&vre);
421
422	40	ret = (i >= 0 && cmp == '~') \|\| (i < 0 && cmp == '!');
423	40	if (!ret)
424	0	vtc_fatal(s->vl, "EXPECT FAILED %s \"%s\"", cmp, spec);
425		else
426	40	vtc_log(s->vl, 4, "EXPECT MATCH %s \"%s\"", cmp, spec);
427	40	}
428
429		static void v_matchproto_(cmd_f)
430	40	cmd_syslog_recv(CMD_ARGS)
431		{
432		int lvl;
433		struct syslog_srv *s;
434
435	40	CAST_OBJ_NOTNULL(s, priv, SYSLOG_SRV_MAGIC);
436	40	(void)vl;
437	40	AZ(strcmp(av[0], "recv"));
438	40	av++;
439	40	if (av[0] == NULL)
440	0	lvl = s->lvl;
441		else
442	40	lvl = get_syslog_level(vl, av[0]);
443
444	40	syslog_rx(s, lvl);
445	40	}
446
447		/**********************************************************************
448		* Syslog server thread
449		*/
450
451		static void *
452	40	syslog_thread(void *priv)
453		{
454		struct syslog_srv *s;
455		int i;
456
457	40	CAST_OBJ_NOTNULL(s, priv, SYSLOG_SRV_MAGIC);
458	40	assert(s->sock >= 0);
459
460	40	vtc_log(s->vl, 2, "Started on %s (level: %d)", s->bind, s->lvl);
461	80	for (i = 0; i < s->repeat; i++) {
462	40	if (s->repeat > 1)
463	0	vtc_log(s->vl, 3, "Iteration %d", i);
464	40	parse_string(s->vl, s, s->spec);
465	40	vtc_log(s->vl, 3, "shutting fd %d", s->sock);
466	40	}
467	40	VUDP_close(&s->sock);
468	40	vtc_log(s->vl, 2, "Ending");
469	40	return (NULL);
470		}
471
472		/**********************************************************************
473		* Start the syslog thread
474		*/
475
476		static void
477	40	syslog_start(struct syslog_srv *s)
478		{
479	40	CHECK_OBJ_NOTNULL(s, SYSLOG_SRV_MAGIC);
480	40	vtc_log(s->vl, 2, "Starting syslog server");
481	40	if (s->sock == -1)
482	0	syslog_bind(s);
483	40	vtc_log(s->vl, 1, "Bound on %s", s->bind);
484	40	s->run = 1;
485	40	PTOK(pthread_create(&s->tp, NULL, syslog_thread, s));
486	40	}
487
488		/**********************************************************************
489		* Force stop the syslog thread
490		*/
491
492		static void
493	0	syslog_stop(struct syslog_srv *s)
494		{
495		void *res;
496
497	0	CHECK_OBJ_NOTNULL(s, SYSLOG_SRV_MAGIC);
498	0	vtc_log(s->vl, 2, "Stopping for syslog server");
499	0	(void)pthread_cancel(s->tp);