run.c revision 302408
1227825Stheraven/* $NetBSD: run.c,v 1.14 2016/04/04 15:52:56 christos Exp $ */ 2227825Stheraven 3227825Stheraven/*- 4227825Stheraven * Copyright (c) 2015 The NetBSD Foundation, Inc. 5227825Stheraven * All rights reserved. 6227825Stheraven * 7227825Stheraven * This code is derived from software contributed to The NetBSD Foundation 8227825Stheraven * by Christos Zoulas. 9227825Stheraven * 10227825Stheraven * Redistribution and use in source and binary forms, with or without 11227825Stheraven * modification, are permitted provided that the following conditions 12227825Stheraven * are met: 13227825Stheraven * 1. Redistributions of source code must retain the above copyright 14227825Stheraven * notice, this list of conditions and the following disclaimer. 15227825Stheraven * 2. Redistributions in binary form must reproduce the above copyright 16227825Stheraven * notice, this list of conditions and the following disclaimer in the 17227825Stheraven * documentation and/or other materials provided with the distribution. 18227825Stheraven * 19227825Stheraven * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20227825Stheraven * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21227825Stheraven * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22227825Stheraven * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23227825Stheraven * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24227825Stheraven * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25227825Stheraven * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26227825Stheraven * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27227825Stheraven * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28227825Stheraven * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29227825Stheraven * POSSIBILITY OF SUCH DAMAGE. 30227825Stheraven */ 31262801Sdim#ifdef HAVE_CONFIG_H 32227825Stheraven#include "config.h" 33227825Stheraven#endif 34227825Stheraven 35227825Stheraven#include <sys/cdefs.h> 36227825Stheraven__RCSID("$NetBSD: run.c,v 1.14 2016/04/04 15:52:56 christos Exp $"); 37227825Stheraven 38227825Stheraven#include <stdio.h> 39227825Stheraven#ifdef HAVE_LIBUTIL_H 40227825Stheraven#include <libutil.h> 41227825Stheraven#endif 42227825Stheraven#ifdef HAVE_UTIL_H 43227825Stheraven#include <util.h> 44227825Stheraven#endif 45227825Stheraven#include <stdarg.h> 46227825Stheraven#include <limits.h> 47227825Stheraven#include <stdlib.h> 48227825Stheraven#include <inttypes.h> 49227825Stheraven#include <syslog.h> 50227825Stheraven#include <string.h> 51227825Stheraven#include <netinet/in.h> 52227825Stheraven#include <net/if.h> 53227825Stheraven 54227825Stheraven#include "run.h" 55227825Stheraven#include "conf.h" 56227825Stheraven#include "internal.h" 57227825Stheraven#include "support.h" 58227825Stheraven 59227825Stheravenextern char **environ; 60227825Stheraven 61227825Stheravenstatic char * 62227825Stheravenrun(const char *cmd, const char *name, ...) 63227825Stheraven{ 64227825Stheraven const char *argv[20]; 65227825Stheraven size_t i; 66227825Stheraven va_list ap; 67227825Stheraven FILE *fp; 68227825Stheraven char buf[10240], *res; 69227825Stheraven 70227825Stheraven argv[0] = "control"; 71227825Stheraven argv[1] = cmd; 72227825Stheraven argv[2] = name; 73227825Stheraven va_start(ap, name); 74227825Stheraven for (i = 3; i < __arraycount(argv) && 75227825Stheraven (argv[i] = va_arg(ap, char *)) != NULL; i++) 76227825Stheraven continue; 77227825Stheraven va_end(ap); 78227825Stheraven 79227825Stheraven if (debug) { 80227825Stheraven size_t z; 81227825Stheraven int r; 82227825Stheraven 83227825Stheraven r = snprintf(buf, sizeof(buf), "run %s [", controlprog); 84227825Stheraven if (r == -1 || (z = (size_t)r) >= sizeof(buf)) 85227825Stheraven z = sizeof(buf); 86227825Stheraven for (i = 0; argv[i]; i++) { 87227825Stheraven r = snprintf(buf + z, sizeof(buf) - z, "%s%s", 88227825Stheraven argv[i], argv[i + 1] ? " " : ""); 89227825Stheraven if (r == -1 || (z += (size_t)r) >= sizeof(buf)) 90227825Stheraven z = sizeof(buf); 91227825Stheraven } 92227825Stheraven (*lfun)(LOG_DEBUG, "%s]", buf); 93227825Stheraven } 94278724Sdim 95227825Stheraven fp = popenve(controlprog, __UNCONST(argv), environ, "r"); 96227825Stheraven if (fp == NULL) { 97227825Stheraven (*lfun)(LOG_ERR, "popen %s failed (%m)", controlprog); 98227825Stheraven return NULL; 99227825Stheraven } 100227825Stheraven if (fgets(buf, sizeof(buf), fp) != NULL) 101227825Stheraven res = strdup(buf); 102227825Stheraven else 103227825Stheraven res = NULL; 104227825Stheraven pclose(fp); 105227825Stheraven if (debug) 106227825Stheraven (*lfun)(LOG_DEBUG, "%s returns %s", cmd, res); 107227825Stheraven return res; 108227825Stheraven} 109227825Stheraven 110227825Stheravenvoid 111227825Stheravenrun_flush(const struct conf *c) 112227825Stheraven{ 113227825Stheraven free(run("flush", c->c_name, NULL)); 114227825Stheraven} 115227825Stheraven 116227825Stheravenint 117227825Stheravenrun_change(const char *how, const struct conf *c, char *id, size_t len) 118227825Stheraven{ 119227825Stheraven const char *prname; 120227825Stheraven char poname[64], adname[128], maskname[32], *rv; 121227825Stheraven size_t off; 122227825Stheraven 123227825Stheraven switch (c->c_proto) { 124227825Stheraven case -1: 125227825Stheraven prname = ""; 126227825Stheraven break; 127227825Stheraven case IPPROTO_TCP: 128227825Stheraven prname = "tcp"; 129227825Stheraven break; 130227825Stheraven case IPPROTO_UDP: 131227825Stheraven prname = "udp"; 132227825Stheraven break; 133227825Stheraven default: 134249998Sdim (*lfun)(LOG_ERR, "%s: bad protocol %d", __func__, c->c_proto); 135227825Stheraven return -1; 136227825Stheraven } 137227825Stheraven 138227825Stheraven if (c->c_port != -1) 139227825Stheraven snprintf(poname, sizeof(poname), "%d", c->c_port); 140227825Stheraven else 141227825Stheraven poname[0] = '\0'; 142253159Stheraven 143253159Stheraven snprintf(maskname, sizeof(maskname), "%d", c->c_lmask); 144253159Stheraven sockaddr_snprintf(adname, sizeof(adname), "%a", (const void *)&c->c_ss); 145253159Stheraven 146253159Stheraven rv = run(how, c->c_name, prname, adname, maskname, poname, id, NULL); 147253159Stheraven if (rv == NULL) 148253159Stheraven return -1; 149253159Stheraven if (len != 0) { 150253159Stheraven rv[strcspn(rv, "\n")] = '\0'; 151253159Stheraven off = strncmp(rv, "OK ", 3) == 0 ? 3 : 0; 152253159Stheraven strlcpy(id, rv + off, len); 153253159Stheraven } 154253159Stheraven free(rv); 155253159Stheraven return 0; 156253159Stheraven} 157253159Stheraven