pimd/pim_tlv.h

   1 /*
   2   PIM for Quagga
   3   Copyright (C) 2008  Everton da Silva Marques
   4
   5   This program is free software; you can redistribute it and/or modify
   6   it under the terms of the GNU General Public License as published by
   7   the Free Software Foundation; either version 2 of the License, or
   8   (at your option) any later version.
   9
  10   This program is distributed in the hope that it will be useful, but
  11   WITHOUT ANY WARRANTY; without even the implied warranty of
  12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13   General Public License for more details.
  14
  15   You should have received a copy of the GNU General Public License
  16   along with this program; see the file COPYING; if not, write to the
  17   Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
  18   MA 02110-1301 USA
  19
  20   $QuaggaId: $Format:%an, %ai, %h$ $
  21 */
  22
  23 #ifndef PIM_TLV_H
  24 #define PIM_TLV_H
  25
  26 #include <zebra.h>
  27
  28 #include "config.h"
  29 #include "if.h"
  30 #include "linklist.h"
  31
  32 #define PIM_MSG_OPTION_TYPE_HOLDTIME         (1)
  33 #define PIM_MSG_OPTION_TYPE_LAN_PRUNE_DELAY  (2)
  34 #define PIM_MSG_OPTION_TYPE_DR_PRIORITY      (19)
  35 #define PIM_MSG_OPTION_TYPE_GENERATION_ID    (20)
  36 #define PIM_MSG_OPTION_TYPE_DM_STATE_REFRESH (21)
  37 #define PIM_MSG_OPTION_TYPE_ADDRESS_LIST     (24)
  38
  39 typedef uint32_t pim_hello_options;
  40 #define PIM_OPTION_MASK_HOLDTIME                     (1 << 0) /* recv holdtime */
  41 #define PIM_OPTION_MASK_LAN_PRUNE_DELAY              (1 << 1) /* recv lan_prune_delay */
  42 #define PIM_OPTION_MASK_DR_PRIORITY                  (1 << 2) /* recv dr_priority */
  43 #define PIM_OPTION_MASK_GENERATION_ID                (1 << 3) /* recv generation_id */
  44 #define PIM_OPTION_MASK_ADDRESS_LIST                 (1 << 4) /* recv secondary address list */
  45 #define PIM_OPTION_MASK_CAN_DISABLE_JOIN_SUPPRESSION (1 << 5) /* T bit value (valid if recv lan_prune_delay) */
  46
  47 #define PIM_RPT_BIT_MASK      (1 << 0)
  48 #define PIM_WILDCARD_BIT_MASK (1 << 1)
  49
  50 #define PIM_OPTION_SET(options, option_mask) ((options) |= (option_mask))
  51 #define PIM_OPTION_UNSET(options, option_mask) ((options) &= ~(option_mask))
  52 #define PIM_OPTION_IS_SET(options, option_mask) ((options) & (option_mask))
  53
  54 #define PIM_TLV_GET_UINT16(buf) ntohs(*(const uint16_t *)(buf))
  55 #define PIM_TLV_GET_UINT32(buf) ntohl(*(const uint32_t *)(buf))
  56 #define PIM_TLV_GET_TYPE(buf) PIM_TLV_GET_UINT16(buf)
  57 #define PIM_TLV_GET_LENGTH(buf) PIM_TLV_GET_UINT16(buf)
  58 #define PIM_TLV_GET_HOLDTIME(buf) PIM_TLV_GET_UINT16(buf)
  59 #define PIM_TLV_GET_PROPAGATION_DELAY(buf) (PIM_TLV_GET_UINT16(buf) & 0x7FFF)
  60 #define PIM_TLV_GET_OVERRIDE_INTERVAL(buf) PIM_TLV_GET_UINT16(buf)
  61 #define PIM_TLV_GET_CAN_DISABLE_JOIN_SUPPRESSION(buf) ((*(const uint8_t *)(buf)) & 0x80)
  62 #define PIM_TLV_GET_DR_PRIORITY(buf) PIM_TLV_GET_UINT32(buf)
  63 #define PIM_TLV_GET_GENERATION_ID(buf) PIM_TLV_GET_UINT32(buf)
  64
  65 #define PIM_TLV_TYPE_SIZE               (2)
  66 #define PIM_TLV_LENGTH_SIZE             (2)
  67 #define PIM_TLV_MIN_SIZE                (PIM_TLV_TYPE_SIZE + PIM_TLV_LENGTH_SIZE)
  68 #define PIM_TLV_OPTION_SIZE(option_len) (PIM_TLV_MIN_SIZE + (option_len))
  69
  70 uint8_t *pim_tlv_append_uint16(uint8_t *buf,
  71                                const uint8_t *buf_pastend,
  72                                uint16_t option_type,
  73                                uint16_t option_value);
  74 uint8_t *pim_tlv_append_2uint16(uint8_t *buf,
  75                                 const uint8_t *buf_pastend,
  76                                 uint16_t option_type,
  77                                 uint16_t option_value1,
  78                                 uint16_t option_value2);
  79 uint8_t *pim_tlv_append_uint32(uint8_t *buf,
  80                                const uint8_t *buf_pastend,
  81                                uint16_t option_type,
  82                                uint32_t option_value);
  83 uint8_t *pim_tlv_append_addrlist_ucast(uint8_t *buf,
  84                                        const uint8_t *buf_pastend,
  85                                        struct list *ifconnected);
  86
  87 int pim_tlv_parse_holdtime(const char *ifname, struct in_addr src_addr,
  88                            pim_hello_options *hello_options,
  89                            uint16_t *hello_option_holdtime,
  90                            uint16_t option_len,
  91                            const uint8_t *tlv_curr);
  92 int pim_tlv_parse_lan_prune_delay(const char *ifname, struct in_addr src_addr,
  93                                   pim_hello_options *hello_options,
  94                                   uint16_t *hello_option_propagation_delay,
  95                                   uint16_t *hello_option_override_interval,
  96                                   uint16_t option_len,
  97                                   const uint8_t *tlv_curr);
  98 int pim_tlv_parse_dr_priority(const char *ifname, struct in_addr src_addr,
  99                               pim_hello_options *hello_options,
 100                               uint32_t *hello_option_dr_priority,
 101                               uint16_t option_len,
 102                               const uint8_t *tlv_curr);
 103 int pim_tlv_parse_generation_id(const char *ifname, struct in_addr src_addr,
 104                                 pim_hello_options *hello_options,
 105                                 uint32_t *hello_option_generation_id,
 106                                 uint16_t option_len,
 107                                 const uint8_t *tlv_curr);
 108 int pim_tlv_parse_addr_list(const char *ifname, struct in_addr src_addr,
 109                             pim_hello_options *hello_options,
 110                             struct list **hello_option_addr_list,
 111                             uint16_t option_len,
 112                             const uint8_t *tlv_curr);
 113
 114 int pim_parse_addr_ucast (struct prefix *p,
 115                           const uint8_t *buf,
 116                           int buf_size);
 117 int pim_parse_addr_group (struct prefix *p,
 118                           const uint8_t *buf,
 119                           int buf_size);
 120 int pim_parse_addr_source(struct prefix *p,
 121                           uint8_t *flags,
 122                           const uint8_t *buf,
 123                           int buf_size);
 124
 125 #endif /* PIM_TLV_H */