1 /* $NetBSD: run.c,v 1.3 2025/02/11 17:48:30 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 #ifdef HAVE_SYS_CDEFS_H 36 #include <sys/cdefs.h> 37 #endif 38 __RCSID("$NetBSD: run.c,v 1.3 2025/02/11 17:48:30 christos Exp $"); 39 40 #include <stdio.h> 41 #ifdef HAVE_LIBUTIL_H 42 #include <libutil.h> 43 #endif 44 #ifdef HAVE_UTIL_H 45 #include <util.h> 46 #endif 47 #include <stdarg.h> 48 #include <limits.h> 49 #include <stdlib.h> 50 #include <inttypes.h> 51 #include <syslog.h> 52 #include <string.h> 53 #include <netinet/in.h> 54 #include <net/if.h> 55 56 #include "run.h" 57 #include "conf.h" 58 #include "internal.h" 59 #include "support.h" 60 61 extern char **environ; 62 63 static char * 64 run(const char *cmd, const char *name, ...) 65 { 66 const char *argv[20]; 67 size_t i; 68 va_list ap; 69 FILE *fp; 70 char buf[10240], *res; 71 72 argv[0] = "control"; 73 argv[1] = cmd; 74 argv[2] = name; 75 va_start(ap, name); 76 for (i = 3; i < __arraycount(argv) && 77 (argv[i] = va_arg(ap, char *)) != NULL; i++) 78 continue; 79 va_end(ap); 80 81 if (debug) { 82 size_t z; 83 int r; 84 85 r = snprintf(buf, sizeof(buf), "run %s [", controlprog); 86 if (r == -1 || (z = (size_t)r) >= sizeof(buf)) 87 z = sizeof(buf); 88 for (i = 0; argv[i]; i++) { 89 r = snprintf(buf + z, sizeof(buf) - z, "%s%s", 90 argv[i], argv[i + 1] ? " " : ""); 91 if (r == -1 || (z += (size_t)r) >= sizeof(buf)) 92 z = sizeof(buf); 93 } 94 (*lfun)(LOG_DEBUG, "%s]", buf); 95 } 96 97 fp = popenve(controlprog, __UNCONST(argv), environ, "r"); 98 if (fp == NULL) { 99 (*lfun)(LOG_ERR, "popen %s failed (%m)", controlprog); 100 return NULL; 101 } 102 if (fgets(buf, sizeof(buf), fp) != NULL) 103 res = strdup(buf); 104 else 105 res = NULL; 106 pclose(fp); 107 if (debug) 108 (*lfun)(LOG_DEBUG, "%s returns %s", cmd, res); 109 return res; 110 } 111 112 void 113 run_flush(const struct conf *c) 114 { 115 free(run("flush", c->c_name, NULL)); 116 } 117 118 int 119 run_change(const char *how, const struct conf *c, char *id, size_t len) 120 { 121 const char *prname; 122 char poname[64], adname[128], maskname[32], *rv; 123 size_t off; 124 125 switch (c->c_proto) { 126 case -1: 127 prname = ""; 128 break; 129 case IPPROTO_TCP: 130 prname = "tcp"; 131 break; 132 case IPPROTO_UDP: 133 prname = "udp"; 134 break; 135 default: 136 (*lfun)(LOG_ERR, "%s: bad protocol %d (line %zu)", __func__, 137 c->c_proto, c->c_lineno); 138 return -1; 139 } 140 141 if (c->c_port != -1) 142 snprintf(poname, sizeof(poname), "%d", c->c_port); 143 else 144 poname[0] = '\0'; 145 146 snprintf(maskname, sizeof(maskname), "%d", c->c_lmask); 147 sockaddr_snprintf(adname, sizeof(adname), "%a", (const void *)&c->c_ss); 148 149 rv = run(how, c->c_name, prname, adname, maskname, poname, id, NULL); 150 if (rv == NULL) 151 return -1; 152 if (len != 0) { 153 rv[strcspn(rv, "\n")] = '\0'; 154 off = strncmp(rv, "OK ", 3) == 0 ? 3 : 0; 155 strlcpy(id, rv + off, len); 156 } 157 free(rv); 158 return 0; 159 } 160