lib/srv6.c

   1 /*
   2  * SRv6 definitions
   3  * Copyright (C) 2020  Hiroki Shirokura, LINE Corporation
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the Free
   7  * Software Foundation; either version 2 of the License, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; see the file COPYING; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  18  */
  19
  20 #include "srv6.h"
  21 #include "log.h"
  22
  23 const char *seg6local_action2str(uint32_t action)
  24 {
  25         switch (action) {
  26         case ZEBRA_SEG6_LOCAL_ACTION_END:
  27                 return "End";
  28         case ZEBRA_SEG6_LOCAL_ACTION_END_X:
  29                 return "End.X";
  30         case ZEBRA_SEG6_LOCAL_ACTION_END_T:
  31                 return "End.T";
  32         case ZEBRA_SEG6_LOCAL_ACTION_END_DX2:
  33                 return "End.DX2";
  34         case ZEBRA_SEG6_LOCAL_ACTION_END_DX6:
  35                 return "End.DX6";
  36         case ZEBRA_SEG6_LOCAL_ACTION_END_DX4:
  37                 return "End.DX4";
  38         case ZEBRA_SEG6_LOCAL_ACTION_END_DT6:
  39                 return "End.DT6";
  40         case ZEBRA_SEG6_LOCAL_ACTION_END_DT4:
  41                 return "End.DT4";
  42         case ZEBRA_SEG6_LOCAL_ACTION_END_B6:
  43                 return "End.B6";
  44         case ZEBRA_SEG6_LOCAL_ACTION_END_B6_ENCAP:
  45                 return "End.B6.Encap";
  46         case ZEBRA_SEG6_LOCAL_ACTION_END_BM:
  47                 return "End.BM";
  48         case ZEBRA_SEG6_LOCAL_ACTION_END_S:
  49                 return "End.S";
  50         case ZEBRA_SEG6_LOCAL_ACTION_END_AS:
  51                 return "End.AS";
  52         case ZEBRA_SEG6_LOCAL_ACTION_END_AM:
  53                 return "End.AM";
  54         case ZEBRA_SEG6_LOCAL_ACTION_UNSPEC:
  55                 return "unspec";
  56         default:
  57                 return "unknown";
  58         }
  59 }
  60
  61 int snprintf_seg6_segs(char *str,
  62                 size_t size, const struct seg6_segs *segs)
  63 {
  64         str[0] = '\0';
  65         for (size_t i = 0; i < segs->num_segs; i++) {
  66                 char addr[INET6_ADDRSTRLEN];
  67                 bool not_last = (i + 1) < segs->num_segs;
  68
  69                 inet_ntop(AF_INET6, &segs->segs[i], addr, sizeof(addr));
  70                 strlcat(str, addr, size);
  71                 strlcat(str, not_last ? "," : "", size);
  72         }
  73         return strlen(str);
  74 }
  75
  76 const char *seg6local_context2str(char *str, size_t size,
  77                 struct seg6local_context *ctx, uint32_t action)
  78 {
  79         char b0[128];
  80
  81         switch (action) {
  82
  83         case ZEBRA_SEG6_LOCAL_ACTION_END:
  84                 snprintf(str, size, "USP");
  85                 return str;
  86
  87         case ZEBRA_SEG6_LOCAL_ACTION_END_X:
  88         case ZEBRA_SEG6_LOCAL_ACTION_END_DX6:
  89                 inet_ntop(AF_INET6, &ctx->nh6, b0, 128);
  90                 snprintf(str, size, "nh6 %s", b0);
  91                 return str;
  92
  93         case ZEBRA_SEG6_LOCAL_ACTION_END_DX4:
  94                 inet_ntop(AF_INET, &ctx->nh4, b0, 128);
  95                 snprintf(str, size, "nh4 %s", b0);
  96                 return str;
  97
  98         case ZEBRA_SEG6_LOCAL_ACTION_END_T:
  99         case ZEBRA_SEG6_LOCAL_ACTION_END_DT6:
 100         case ZEBRA_SEG6_LOCAL_ACTION_END_DT4:
 101                 snprintf(str, size, "table %u", ctx->table);
 102                 return str;
 103
 104         case ZEBRA_SEG6_LOCAL_ACTION_END_DX2:
 105         case ZEBRA_SEG6_LOCAL_ACTION_END_B6:
 106         case ZEBRA_SEG6_LOCAL_ACTION_END_B6_ENCAP:
 107         case ZEBRA_SEG6_LOCAL_ACTION_END_BM:
 108         case ZEBRA_SEG6_LOCAL_ACTION_END_S:
 109         case ZEBRA_SEG6_LOCAL_ACTION_END_AS:
 110         case ZEBRA_SEG6_LOCAL_ACTION_END_AM:
 111         case ZEBRA_SEG6_LOCAL_ACTION_UNSPEC:
 112         default:
 113                 snprintf(str, size, "unknown(%s)", __func__);
 114                 return str;
 115         }
 116 }