ospf6d/ospf6_proto.c

   1 /*
   2  * Copyright (C) 2003 Yasuhiro Ohara
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <zebra.h>
  22
  23 #include "log.h"
  24
  25 #include "ospf6_proto.h"
  26
  27 void ospf6_prefix_in6_addr(struct in6_addr *in6, const void *prefix_buf,
  28                            const struct ospf6_prefix *p)
  29 {
  30         ptrdiff_t in6_off = (caddr_t)p->addr - (caddr_t)prefix_buf;
  31
  32         memset(in6, 0, sizeof(struct in6_addr));
  33         memcpy(in6, (uint8_t *)prefix_buf + in6_off,
  34                OSPF6_PREFIX_SPACE(p->prefix_length));
  35 }
  36
  37 void ospf6_prefix_apply_mask(struct ospf6_prefix *op)
  38 {
  39         uint8_t *pnt, mask;
  40         int index, offset;
  41
  42         pnt = (uint8_t *)((caddr_t)op + sizeof(struct ospf6_prefix));
  43         index = op->prefix_length / 8;
  44         offset = op->prefix_length % 8;
  45         mask = 0xff << (8 - offset);
  46
  47         if (index > 16) {
  48                 zlog_warn("Prefix length too long: %d", op->prefix_length);
  49                 return;
  50         }
  51
  52         /* nonzero mask means no check for this byte because if it contains
  53          * prefix bits it must be there for us to write */
  54         if (mask)
  55                 pnt[index++] &= mask;
  56
  57         while (index < OSPF6_PREFIX_SPACE(op->prefix_length))
  58                 pnt[index++] = 0;
  59 }
  60
  61 void ospf6_prefix_options_printbuf(uint8_t prefix_options, char *buf, int size)
  62 {
  63         const char *dn, *p, *mc, *la, *nu;
  64
  65         dn = (CHECK_FLAG(prefix_options, OSPF6_PREFIX_OPTION_DN) ? "DN" : "--");
  66         p = (CHECK_FLAG(prefix_options, OSPF6_PREFIX_OPTION_P) ? "P" : "--");
  67         mc = (CHECK_FLAG(prefix_options, OSPF6_PREFIX_OPTION_MC) ? "MC" : "--");
  68         la = (CHECK_FLAG(prefix_options, OSPF6_PREFIX_OPTION_LA) ? "LA" : "--");
  69         nu = (CHECK_FLAG(prefix_options, OSPF6_PREFIX_OPTION_NU) ? "NU" : "--");
  70         snprintf(buf, size, "%s|%s|%s|%s|%s", dn, p, mc, la, nu);
  71 }
  72
  73 void ospf6_capability_printbuf(char capability, char *buf, int size)
  74 {
  75         char w, v, e, b;
  76         w = (capability & OSPF6_ROUTER_BIT_W ? 'W' : '-');
  77         v = (capability & OSPF6_ROUTER_BIT_V ? 'V' : '-');
  78         e = (capability & OSPF6_ROUTER_BIT_E ? 'E' : '-');
  79         b = (capability & OSPF6_ROUTER_BIT_B ? 'B' : '-');
  80         snprintf(buf, size, "----%c%c%c%c", w, v, e, b);
  81 }
  82
  83 void ospf6_options_printbuf(uint8_t *options, char *buf, int size)
  84 {
  85         const char *dc, *r, *n, *mc, *e, *v6, *af, *at, *l;
  86         dc = (OSPF6_OPT_ISSET(options, OSPF6_OPT_DC) ? "DC" : "--");
  87         r = (OSPF6_OPT_ISSET(options, OSPF6_OPT_R) ? "R" : "-");
  88         n = (OSPF6_OPT_ISSET(options, OSPF6_OPT_N) ? "N" : "-");
  89         mc = (OSPF6_OPT_ISSET(options, OSPF6_OPT_MC) ? "MC" : "--");
  90         e = (OSPF6_OPT_ISSET(options, OSPF6_OPT_E) ? "E" : "-");
  91         v6 = (OSPF6_OPT_ISSET(options, OSPF6_OPT_V6) ? "V6" : "--");
  92         af = (OSPF6_OPT_ISSET_EXT(options, OSPF6_OPT_AF) ? "AF" : "--");
  93         at = (OSPF6_OPT_ISSET_EXT(options, OSPF6_OPT_AT) ? "AT" : "--");
  94         l = (OSPF6_OPT_ISSET_EXT(options, OSPF6_OPT_L) ? "L" : "-");
  95         snprintf(buf, size, "%s|%s|%s|-|-|%s|%s|%s|%s|%s|%s", at, l, af, dc, r,
  96                  n, mc, e, v6);
  97 }