zebra/ipforward_solaris.c

   1 /*
   2  * ipforward value get function for solaris.
   3  * Copyright (C) 1997 Kunihiro Ishiguro
   4  *
   5  * This file is part of GNU Zebra.
   6  *
   7  * GNU Zebra is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2, or (at your option) any
  10  * later version.
  11  *
  12  * GNU Zebra is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; see the file COPYING; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include <zebra.h>
  23
  24 #ifdef SUNOS_5
  25
  26 #include "log.h"
  27 #include "prefix.h"
  28 #include "lib_errors.h"
  29
  30 #include "privs.h"
  31 #include "zebra/ipforward.h"
  32 #include "zebra/zebra_errors.h"
  33
  34 /*
  35 ** Solaris should define IP_DEV_NAME in <inet/ip.h>, but we'll save
  36 ** configure.in changes for another day.  We can use the same device
  37 ** for both IPv4 and IPv6.
  38 */
  39 /* #include <inet/ip.h> */
  40 #ifndef IP_DEV_NAME
  41 #define IP_DEV_NAME "/dev/ip"
  42 #endif
  43
  44
  45 extern struct zebra_privs_t zserv_privs;
  46
  47 /* This is a limited ndd style function that operates one integer
  48 ** value only.  Errors return -1. ND_SET commands return 0 on
  49 ** success. ND_GET commands return the value on success (which could
  50 ** be -1 and be confused for an error).  The parameter is the string
  51 ** name of the parameter being referenced.
  52 */
  53
  54 static int solaris_nd(const int cmd, const char *parameter, const int value)
  55 {
  56 #define ND_BUFFER_SIZE 1024
  57         int fd;
  58         char nd_buf[ND_BUFFER_SIZE];
  59         struct strioctl strioctl;
  60         const char *device = IP_DEV_NAME;
  61         int retval;
  62         memset(nd_buf, '\0', ND_BUFFER_SIZE);
  63         /*
  64         ** ND_SET takes a NULL delimited list of strings further terminated
  65         ** buy a NULL.  ND_GET returns a list in a similar layout, although
  66         ** here we only use the first result.
  67         */
  68         if (cmd == ND_SET)
  69                 snprintf(nd_buf, ND_BUFFER_SIZE, "%s%c%d%c", parameter, '\0',
  70                          value, '\0');
  71         else if (cmd == ND_GET)
  72                 snprintf(nd_buf, ND_BUFFER_SIZE, "%s", parameter);
  73         else {
  74                 flog_err_sys(EC_LIB_SYSTEM_CALL,
  75                              "internal error - inappropriate command given to "
  76                              "solaris_nd()%s:%d",
  77                              __FILE__, __LINE__);
  78                 return -1;
  79         }
  80
  81         strioctl.ic_cmd = cmd;
  82         strioctl.ic_timout = 0;
  83         strioctl.ic_len = ND_BUFFER_SIZE;
  84         strioctl.ic_dp = nd_buf;
  85
  86         frr_elevate_privs(&zserv_privs) {
  87                 if ((fd = open(device, O_RDWR)) < 0) {
  88                         flog_err_sys(EC_LIB_SYSTEM_CALL,
  89                                      "failed to open device %s - %s", device,
  90                                      safe_strerror(errno));
  91                         return -1;
  92                 }
  93                 if (ioctl(fd, I_STR, &strioctl) < 0) {
  94                         close(fd);
  95                         flog_err_sys(EC_LIB_SYSTEM_CALL,
  96                                      "ioctl I_STR failed on device %s - %s",
  97                                      device, safe_strerror(errno));
  98                         return -1;
  99                 }
 100                 close(fd);
 101         }
 102
 103         if (cmd == ND_GET) {
 104                 errno = 0;
 105                 retval = atoi(nd_buf);
 106                 if (errno) {
 107                         zlog_debug(
 108                                 "failed to convert returned value to integer - %s",
 109                                 safe_strerror(errno));
 110                         retval = -1;
 111                 }
 112         } else {
 113                 retval = 0;
 114         }
 115         return retval;
 116 }
 117
 118 static int solaris_nd_set(const char *parameter, const int value)
 119 {
 120         return solaris_nd(ND_SET, parameter, value);
 121 }
 122 static int solaris_nd_get(const char *parameter)
 123 {
 124         return solaris_nd(ND_GET, parameter, 0);
 125 }
 126 int ipforward(void)
 127 {
 128         return solaris_nd_get("ip_forwarding");
 129 }
 130
 131 int ipforward_on(void)
 132 {
 133         (void)solaris_nd_set("ip_forwarding", 1);
 134         return ipforward();
 135 }
 136
 137 int ipforward_off(void)
 138 {
 139         (void)solaris_nd_set("ip_forwarding", 0);
 140         return ipforward();
 141 }
 142 int ipforward_ipv6(void)
 143 {
 144         return solaris_nd_get("ip6_forwarding");
 145 }
 146 int ipforward_ipv6_on(void)
 147 {
 148         (void)solaris_nd_set("ip6_forwarding", 1);
 149         return ipforward_ipv6();
 150 }
 151 int ipforward_ipv6_off(void)
 152 {
 153         (void)solaris_nd_set("ip6_forwarding", 0);
 154         return ipforward_ipv6();
 155 }
 156
 157 #endif /* SUNOS_5 */