1 /* $NetBSD: run.c,v 1.14 2016/04/04 15:52:56 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2015 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31 #ifdef HAVE_CONFIG_H
32 #include "config.h"
33 #endif
34
35 #include <sys/cdefs.h>
36 __RCSID("$NetBSD: run.c,v 1.14 2016/04/04 15:52:56 christos Exp $");
37
38 #include <stdio.h>
39 #ifdef HAVE_LIBUTIL_H
40 #include <libutil.h>
41 #endif
42 #ifdef HAVE_UTIL_H
43 #include <util.h>
44 #endif
45 #include <stdarg.h>
46 #include <limits.h>
47 #include <stdlib.h>
48 #include <inttypes.h>
49 #include <syslog.h>
50 #include <string.h>
51 #include <netinet/in.h>
52 #include <net/if.h>
53
54 #include "run.h"
55 #include "conf.h"
56 #include "internal.h"
57 #include "support.h"
58
59 extern char **environ;
60
61 static char *
run(const char * cmd,const char * name,...)62 run(const char *cmd, const char *name, ...)
63 {
64 const char *argv[20];
65 size_t i;
66 va_list ap;
67 FILE *fp;
68 char buf[10240], *res;
69
70 argv[0] = "control";
71 argv[1] = cmd;
72 argv[2] = name;
73 va_start(ap, name);
74 for (i = 3; i < __arraycount(argv) &&
75 (argv[i] = va_arg(ap, char *)) != NULL; i++)
76 continue;
77 va_end(ap);
78
79 if (debug) {
80 size_t z;
81 int r;
82
83 r = snprintf(buf, sizeof(buf), "run %s [", controlprog);
84 if (r == -1 || (z = (size_t)r) >= sizeof(buf))
85 z = sizeof(buf);
86 for (i = 0; argv[i]; i++) {
87 r = snprintf(buf + z, sizeof(buf) - z, "%s%s",
88 argv[i], argv[i + 1] ? " " : "");
89 if (r == -1 || (z += (size_t)r) >= sizeof(buf))
90 z = sizeof(buf);
91 }
92 (*lfun)(LOG_DEBUG, "%s]", buf);
93 }
94
95 fp = popenve(controlprog, __UNCONST(argv), environ, "r");
96 if (fp == NULL) {
97 (*lfun)(LOG_ERR, "popen %s failed (%m)", controlprog);
98 return NULL;
99 }
100 if (fgets(buf, sizeof(buf), fp) != NULL)
101 res = strdup(buf);
102 else
103 res = NULL;
104 pclose(fp);
105 if (debug)
106 (*lfun)(LOG_DEBUG, "%s returns %s", cmd, res);
107 return res;
108 }
109
110 void
run_flush(const struct conf * c)111 run_flush(const struct conf *c)
112 {
113 free(run("flush", c->c_name, NULL));
114 }
115
116 int
run_change(const char * how,const struct conf * c,char * id,size_t len)117 run_change(const char *how, const struct conf *c, char *id, size_t len)
118 {
119 const char *prname;
120 char poname[64], adname[128], maskname[32], *rv;
121 size_t off;
122
123 switch (c->c_proto) {
124 case -1:
125 prname = "";
126 break;
127 case IPPROTO_TCP:
128 prname = "tcp";
129 break;
130 case IPPROTO_UDP:
131 prname = "udp";
132 break;
133 default:
134 (*lfun)(LOG_ERR, "%s: bad protocol %d", __func__, c->c_proto);
135 return -1;
136 }
137
138 if (c->c_port != -1)
139 snprintf(poname, sizeof(poname), "%d", c->c_port);
140 else
141 poname[0] = '\0';
142
143 snprintf(maskname, sizeof(maskname), "%d", c->c_lmask);
144 sockaddr_snprintf(adname, sizeof(adname), "%a", (const void *)&c->c_ss);
145
146 rv = run(how, c->c_name, prname, adname, maskname, poname, id, NULL);
147 if (rv == NULL)
148 return -1;
149 if (len != 0) {
150 rv[strcspn(rv, "\n")] = '\0';
151 off = strncmp(rv, "OK ", 3) == 0 ? 3 : 0;
152 strlcpy(id, rv + off, len);
153 }
154 free(rv);
155 return 0;
156 }
157