external/bsd/blacklist/bin/run.c

   1 /*      $NetBSD: run.c,v 1.13 2015/06/02 14:02:10 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 1.13 2015/06/02 14:02:10 christos Exp $");
  37
  38 #include <stdio.h>
  39 #ifdef HAVE_UTIL_H
  40 #include <util.h>
  41 #endif
  42 #include <stdarg.h>
  43 #include <limits.h>
  44 #include <stdlib.h>
  45 #include <inttypes.h>
  46 #include <syslog.h>
  47 #include <string.h>
  48 #include <netinet/in.h>
  49
  50 #include "run.h"
  51 #include "conf.h"
  52 #include "internal.h"
  53
  54 extern char **environ;
  55
  56 static char *
  57 run(const char *cmd, const char *name, ...)
  58 {
  59         const char *argv[20];
  60         size_t i;
  61         va_list ap;
  62         FILE *fp;
  63         char buf[10240], *res;
  64
  65         argv[0] = "control";
  66         argv[1] = cmd;
  67         argv[2] = name;
  68         va_start(ap, name);
  69         for (i = 3; i < __arraycount(argv) &&
  70             (argv[i] = va_arg(ap, char *)) != NULL; i++)
  71                 continue;
  72         va_end(ap);
  73
  74         if (debug) {
  75                 size_t z;
  76                 int r;
  77
  78                 r = snprintf(buf, sizeof(buf), "run %s [", controlprog);
  79                 if (r == -1 || (z = (size_t)r) >= sizeof(buf))
  80                         z = sizeof(buf);
  81                 for (i = 0; argv[i]; i++) {
  82                         r = snprintf(buf + z, sizeof(buf) - z, "%s%s",
  83                             argv[i], argv[i + 1] ? " " : "");
  84                         if (r == -1 || (z += (size_t)r) >= sizeof(buf))
  85                                 z = sizeof(buf);
  86                 }
  87                 (*lfun)(LOG_DEBUG, "%s]", buf);
  88         }
  89
  90         fp = popenve(controlprog, __UNCONST(argv), environ, "r");
  91         if (fp == NULL) {
  92                 (*lfun)(LOG_ERR, "popen %s failed (%m)", controlprog);
  93                 return NULL;
  94         }
  95         if (fgets(buf, sizeof(buf), fp) != NULL)
  96                 res = strdup(buf);
  97         else
  98                 res = NULL;
  99         pclose(fp);
 100         if (debug)
 101                 (*lfun)(LOG_DEBUG, "%s returns %s", cmd, res);
 102         return res;
 103 }
 104
 105 void
 106 run_flush(const struct conf *c)
 107 {
 108         free(run("flush", c->c_name, NULL));
 109 }
 110
 111 int
 112 run_change(const char *how, const struct conf *c, char *id, size_t len)
 113 {
 114         const char *prname;
 115         char poname[64], adname[128], maskname[32], *rv;
 116         size_t off;
 117
 118         switch (c->c_proto) {
 119         case -1:
 120                 prname = "";
 121                 break;
 122         case IPPROTO_TCP:
 123                 prname = "tcp";
 124                 break;
 125         case IPPROTO_UDP:
 126                 prname = "udp";
 127                 break;
 128         default:
 129                 (*lfun)(LOG_ERR, "%s: bad protocol %d", __func__, c->c_proto);
 130                 return -1;
 131         }
 132
 133         if (c->c_port != -1)
 134                 snprintf(poname, sizeof(poname), "%d", c->c_port);
 135         else
 136                 poname[0] = '\0';
 137
 138         snprintf(maskname, sizeof(maskname), "%d", c->c_lmask);
 139         sockaddr_snprintf(adname, sizeof(adname), "%a", (const void *)&c->c_ss);
 140
 141         rv = run(how, c->c_name, prname, adname, maskname, poname, id, NULL);
 142         if (rv == NULL)
 143                 return -1;
 144         if (len != 0) {
 145                 rv[strcspn(rv, "\n")] = '\0';
 146                 off = strncmp(rv, "OK ", 3) == 0 ? 3 : 0;
 147                 strlcpy(id, rv + off, len);
 148         }
 149         free(rv);
 150         return 0;
 151 }