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
  33 /*
  34 ** Solaris should define IP_DEV_NAME in <inet/ip.h>, but we'll save
  35 ** configure.in changes for another day.  We can use the same device
  36 ** for both IPv4 and IPv6.
  37 */
  38 /* #include <inet/ip.h> */
  39 #ifndef IP_DEV_NAME
  40 #define IP_DEV_NAME "/dev/ip"
  41 #endif
  42
  43
  44 extern struct zebra_privs_t zserv_privs;
  45
  46 /* This is a limited ndd style function that operates one integer
  47 ** value only.  Errors return -1. ND_SET commands return 0 on
  48 ** success. ND_GET commands return the value on success (which could
  49 ** be -1 and be confused for an error).  The parameter is the string
  50 ** name of the parameter being referenced.
  51 */
  52
  53 static int solaris_nd(const int cmd, const char *parameter, const int value)
  54 {
  55 #define ND_BUFFER_SIZE 1024
  56         int fd;
  57         char nd_buf[ND_BUFFER_SIZE];
  58         struct strioctl strioctl;
  59         const char *device = IP_DEV_NAME;
  60         int retval;
  61         memset(nd_buf, '\0', ND_BUFFER_SIZE);
  62         /*
  63         ** ND_SET takes a NULL delimited list of strings further terminated
  64         ** buy a NULL.  ND_GET returns a list in a similar layout, although
  65         ** here we only use the first result.
  66         */
  67         if (cmd == ND_SET)
  68                 snprintf(nd_buf, ND_BUFFER_SIZE, "%s%c%d%c", parameter, '\0',
  69                          value, '\0');
  70         else if (cmd == ND_GET)
  71                 snprintf(nd_buf, ND_BUFFER_SIZE, "%s", parameter);
  72         else {
  73                 flog_err_sys(LIB_ERR_SYSTEM_CALL,
  74                              "internal error - inappropriate command given to "
  75                              "solaris_nd()%s:%d",
  76                              __FILE__, __LINE__);
  77                 return -1;
  78         }
  79
  80         strioctl.ic_cmd = cmd;
  81         strioctl.ic_timout = 0;
  82         strioctl.ic_len = ND_BUFFER_SIZE;
  83         strioctl.ic_dp = nd_buf;
  84
  85         frr_elevate_privs(&zserv_privs) {
  86                 if ((fd = open(device, O_RDWR)) < 0) {
  87                         zlog_warn("failed to open device %s - %s", device,
  88                                   safe_strerror(errno));
  89                         return -1;
  90                 }
  91                 if (ioctl(fd, I_STR, &strioctl) < 0) {
  92                         close(fd);
  93                         zlog_warn("ioctl I_STR failed on device %s - %s",
  94                                   device,
  95                                   safe_strerror(errno));
  96                         return -1;
  97                 }
  98                 close(fd);
  99         }
 100
 101         if (cmd == ND_GET) {
 102                 errno = 0;
 103                 retval = atoi(nd_buf);
 104                 if (errno) {
 105                         zlog_warn(
 106                                 "failed to convert returned value to integer - %s",
 107                                 safe_strerror(errno));
 108                         retval = -1;
 109                 }
 110         } else {
 111                 retval = 0;
 112         }
 113         return retval;
 114 }
 115
 116 static int solaris_nd_set(const char *parameter, const int value)
 117 {
 118         return solaris_nd(ND_SET, parameter, value);
 119 }
 120 static int solaris_nd_get(const char *parameter)
 121 {
 122         return solaris_nd(ND_GET, parameter, 0);
 123 }
 124 int ipforward(void)
 125 {
 126         return solaris_nd_get("ip_forwarding");
 127 }
 128
 129 int ipforward_on(void)
 130 {
 131         (void)solaris_nd_set("ip_forwarding", 1);
 132         return ipforward();
 133 }
 134
 135 int ipforward_off(void)
 136 {
 137         (void)solaris_nd_set("ip_forwarding", 0);
 138         return ipforward();
 139 }
 140 int ipforward_ipv6(void)
 141 {
 142         return solaris_nd_get("ip6_forwarding");
 143 }
 144 int ipforward_ipv6_on(void)
 145 {
 146         (void)solaris_nd_set("ip6_forwarding", 1);
 147         return ipforward_ipv6();
 148 }
 149 int ipforward_ipv6_off(void)
 150 {
 151         (void)solaris_nd_set("ip6_forwarding", 0);
 152         return ipforward_ipv6();
 153 }
 154
 155 #endif /* SUNOS_5 */