run.c revision 301172
1299425Smm/* $NetBSD: run.c,v 1.14 2016/04/04 15:52:56 christos Exp $ */ 2299425Smm 3299425Smm/*- 4299425Smm * Copyright (c) 2015 The NetBSD Foundation, Inc. 5299425Smm * All rights reserved. 6299425Smm * 7299425Smm * This code is derived from software contributed to The NetBSD Foundation 8299425Smm * by Christos Zoulas. 9299425Smm * 10299425Smm * Redistribution and use in source and binary forms, with or without 11299425Smm * modification, are permitted provided that the following conditions 12299425Smm * are met: 13299425Smm * 1. Redistributions of source code must retain the above copyright 14299425Smm * notice, this list of conditions and the following disclaimer. 15299425Smm * 2. Redistributions in binary form must reproduce the above copyright 16299425Smm * notice, this list of conditions and the following disclaimer in the 17299425Smm * documentation and/or other materials provided with the distribution. 18299425Smm * 19299425Smm * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20299425Smm * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21299425Smm * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22299425Smm * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23299425Smm * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24299425Smm * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25299425Smm * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26299425Smm * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27299425Smm * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28299425Smm * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29299425Smm * POSSIBILITY OF SUCH DAMAGE. 30299425Smm */ 31299425Smm#ifdef HAVE_CONFIG_H 32299425Smm#include "config.h" 33299425Smm#endif 34299425Smm 35299425Smm#include <sys/cdefs.h> 36299425Smm__RCSID("$NetBSD: run.c,v 1.14 2016/04/04 15:52:56 christos Exp $"); 37299425Smm 38299425Smm#include <stdio.h> 39299425Smm#ifdef HAVE_LIBUTIL_H 40299425Smm#include <libutil.h> 41299425Smm#endif 42299425Smm#ifdef HAVE_UTIL_H 43299425Smm#include <util.h> 44299425Smm#endif 45299425Smm#include <stdarg.h> 46299425Smm#include <limits.h> 47299425Smm#include <stdlib.h> 48299425Smm#include <inttypes.h> 49299425Smm#include <syslog.h> 50299425Smm#include <string.h> 51299425Smm#include <netinet/in.h> 52299425Smm#include <net/if.h> 53299425Smm 54299425Smm#include "run.h" 55299425Smm#include "conf.h" 56299425Smm#include "internal.h" 57299425Smm#include "support.h" 58299425Smm 59299425Smmextern char **environ; 60299425Smm 61299425Smmstatic char * 62299425Smmrun(const char *cmd, const char *name, ...) 63299425Smm{ 64299425Smm const char *argv[20]; 65299425Smm size_t i; 66299425Smm va_list ap; 67299425Smm FILE *fp; 68299425Smm char buf[10240], *res; 69299425Smm 70299425Smm argv[0] = "control"; 71299425Smm argv[1] = cmd; 72299425Smm argv[2] = name; 73299425Smm va_start(ap, name); 74299425Smm for (i = 3; i < __arraycount(argv) && 75299425Smm (argv[i] = va_arg(ap, char *)) != NULL; i++) 76299425Smm continue; 77299425Smm va_end(ap); 78299425Smm 79299425Smm if (debug) { 80299425Smm size_t z; 81299425Smm int r; 82299425Smm 83299425Smm r = snprintf(buf, sizeof(buf), "run %s [", controlprog); 84299425Smm if (r == -1 || (z = (size_t)r) >= sizeof(buf)) 85299425Smm z = sizeof(buf); 86299425Smm for (i = 0; argv[i]; i++) { 87299425Smm r = snprintf(buf + z, sizeof(buf) - z, "%s%s", 88299425Smm argv[i], argv[i + 1] ? " " : ""); 89299425Smm if (r == -1 || (z += (size_t)r) >= sizeof(buf)) 90299425Smm z = sizeof(buf); 91299425Smm } 92299425Smm (*lfun)(LOG_DEBUG, "%s]", buf); 93299425Smm } 94299425Smm 95299425Smm fp = popenve(controlprog, __UNCONST(argv), environ, "r"); 96299425Smm if (fp == NULL) { 97299425Smm (*lfun)(LOG_ERR, "popen %s failed (%m)", controlprog); 98299425Smm return NULL; 99299425Smm } 100299425Smm if (fgets(buf, sizeof(buf), fp) != NULL) 101299425Smm res = strdup(buf); 102299425Smm else 103299425Smm res = NULL; 104299425Smm pclose(fp); 105299425Smm if (debug) 106299425Smm (*lfun)(LOG_DEBUG, "%s returns %s", cmd, res); 107299425Smm return res; 108299425Smm} 109299425Smm 110299425Smmvoid 111299425Smmrun_flush(const struct conf *c) 112299425Smm{ 113299425Smm free(run("flush", c->c_name, NULL)); 114299425Smm} 115299425Smm 116299425Smmint 117299425Smmrun_change(const char *how, const struct conf *c, char *id, size_t len) 118299425Smm{ 119299425Smm const char *prname; 120299425Smm char poname[64], adname[128], maskname[32], *rv; 121299425Smm size_t off; 122299425Smm 123299425Smm switch (c->c_proto) { 124299425Smm case -1: 125299425Smm 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