eigrpd/eigrp_packet.h

   1 /*
   2  * EIGRP General Sending and Receiving of EIGRP Packets.
   3  * Copyright (C) 2013-2016
   4  * Authors:
   5  *   Donnie Savage
   6  *   Jan Janovic
   7  *   Matej Perina
   8  *   Peter Orsag
   9  *   Peter Paluch
  10  *   Frantisek Gazo
  11  *   Tomas Hvorkovy
  12  *   Martin Kontsek
  13  *   Lukas Koribsky
  14  *
  15  * This file is part of GNU Zebra.
  16  *
  17  * GNU Zebra is free software; you can redistribute it and/or modify it
  18  * under the terms of the GNU General Public License as published by the
  19  * Free Software Foundation; either version 2, or (at your option) any
  20  * later version.
  21  *
  22  * GNU Zebra is distributed in the hope that it will be useful, but
  23  * WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  25  * General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License along
  28  * with this program; see the file COPYING; if not, write to the Free Software
  29  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  30  */
  31
  32 #ifndef _ZEBRA_EIGRP_PACKET_H
  33 #define _ZEBRA_EIGRP_PACKET_H
  34
  35 /*Prototypes*/
  36 extern int eigrp_read(struct thread *);
  37 extern int eigrp_write(struct thread *);
  38
  39 extern struct eigrp_packet *eigrp_packet_new(size_t size,
  40                                              struct eigrp_neighbor *nbr);
  41 extern struct eigrp_packet *eigrp_packet_duplicate(struct eigrp_packet *old,
  42                                                    struct eigrp_neighbor *nbr);
  43 extern void eigrp_packet_free(struct eigrp_packet *ep);
  44 extern void eigrp_packet_delete(struct eigrp_interface *ei);
  45 extern void eigrp_packet_header_init(int type, struct eigrp *eigrp,
  46                                      struct stream *s, uint32_t flags,
  47                                      uint32_t sequence, uint32_t ack);
  48 extern void eigrp_packet_checksum(struct eigrp_interface *ei, struct stream *s,
  49                                   uint16_t length);
  50
  51 extern struct eigrp_fifo *eigrp_fifo_new(void);
  52 extern struct eigrp_packet *eigrp_fifo_next(struct eigrp_fifo *fifo);
  53 extern struct eigrp_packet *eigrp_fifo_pop(struct eigrp_fifo *fifo);
  54 extern void eigrp_fifo_push(struct eigrp_fifo *fifo, struct eigrp_packet *ep);
  55 extern void eigrp_fifo_free(struct eigrp_fifo *fifo);
  56 extern void eigrp_fifo_reset(struct eigrp_fifo *fifo);
  57
  58 extern void eigrp_send_packet_reliably(struct eigrp_neighbor *nbr);
  59
  60 extern struct TLV_IPv4_Internal_type *eigrp_read_ipv4_tlv(struct stream *s);
  61 extern uint16_t
  62 eigrp_add_internalTLV_to_stream(struct stream *s,
  63                                 struct eigrp_prefix_descriptor *pe);
  64 extern uint16_t eigrp_add_authTLV_MD5_to_stream(struct stream *s,
  65                                                 struct eigrp_interface *ei);
  66 extern uint16_t eigrp_add_authTLV_SHA256_to_stream(struct stream *s,
  67                                                    struct eigrp_interface *ei);
  68
  69 extern int eigrp_unack_packet_retrans(struct thread *thread);
  70 extern int eigrp_unack_multicast_packet_retrans(struct thread *thread);
  71
  72 /*
  73  * untill there is reason to have their own header, these externs are found in
  74  * eigrp_hello.c
  75  */
  76 extern void eigrp_sw_version_initialize(void);
  77 extern void eigrp_hello_send(struct eigrp_interface *ei, uint8_t flags,
  78                              struct in_addr *nbr_addr);
  79 extern void eigrp_hello_send_ack(struct eigrp_neighbor *nbr);
  80 extern void eigrp_hello_receive(struct eigrp *eigrp, struct ip *iph,
  81                                 struct eigrp_header *eigrph, struct stream *s,
  82                                 struct eigrp_interface *ei, int size);
  83 extern int eigrp_hello_timer(struct thread *thread);
  84
  85 /*
  86  * These externs are found in eigrp_update.c
  87  */
  88 extern bool eigrp_update_prefix_apply(struct eigrp *eigrp,
  89                                       struct eigrp_interface *ei, int in,
  90                                       struct prefix *prefix);
  91 extern void eigrp_update_send(struct eigrp_interface *ei);
  92 extern void eigrp_update_receive(struct eigrp *eigrp, struct ip *iph,
  93                                  struct eigrp_header *eigrph, struct stream *s,
  94                                  struct eigrp_interface *ei, int size);
  95 extern void eigrp_update_send_all(struct eigrp *eigrp,
  96                                   struct eigrp_interface *exception);
  97 extern void eigrp_update_send_init(struct eigrp_neighbor *nbr);
  98 extern void eigrp_update_send_EOT(struct eigrp_neighbor *nbr);
  99 extern int eigrp_update_send_GR_thread(struct thread *thread);
 100 extern void eigrp_update_send_GR(struct eigrp_neighbor *nbr,
 101                                  enum GR_type gr_type, struct vty *vty);
 102 extern void eigrp_update_send_interface_GR(struct eigrp_interface *ei,
 103                                            enum GR_type gr_type,
 104                                            struct vty *vty);
 105 extern void eigrp_update_send_process_GR(struct eigrp *eigrp,
 106                                          enum GR_type gr_type, struct vty *vty);
 107
 108 /*
 109  * These externs are found in eigrp_query.c
 110  */
 111
 112 extern void eigrp_send_query(struct eigrp_interface *ei);
 113 extern void eigrp_query_receive(struct eigrp *eigrp, struct ip *iph,
 114                                 struct eigrp_header *eigrph, struct stream *s,
 115                                 struct eigrp_interface *ei, int size);
 116 extern uint32_t eigrp_query_send_all(struct eigrp *eigrp);
 117
 118 /*
 119  * These externs are found in eigrp_reply.c
 120  */
 121 extern void eigrp_send_reply(struct eigrp_neighbor *nbr,
 122                              struct eigrp_prefix_descriptor *pe);
 123 extern void eigrp_reply_receive(struct eigrp *eigrp, struct ip *iph,
 124                                 struct eigrp_header *eigrph, struct stream *s,
 125                                 struct eigrp_interface *ei, int size);
 126
 127 /*
 128  * These externs are found in eigrp_siaquery.c
 129  */
 130 extern void eigrp_send_siaquery(struct eigrp_neighbor *nbr,
 131                                 struct eigrp_prefix_descriptor *pe);
 132 extern void eigrp_siaquery_receive(struct eigrp *eigrp, struct ip *iph,
 133                                    struct eigrp_header *eigrph,
 134                                    struct stream *s, struct eigrp_interface *ei,
 135                                    int size);
 136
 137 /*
 138  * These externs are found in eigrp_siareply.c
 139  */
 140 extern void eigrp_send_siareply(struct eigrp_neighbor *nbr,
 141                                 struct eigrp_prefix_descriptor *pe);
 142 extern void eigrp_siareply_receive(struct eigrp *eigrp, struct ip *iph,
 143                                    struct eigrp_header *eigrph,
 144                                    struct stream *s, struct eigrp_interface *ei,
 145                                    int size);
 146
 147 extern struct TLV_MD5_Authentication_Type *eigrp_authTLV_MD5_new(void);
 148 extern void eigrp_authTLV_MD5_free(struct TLV_MD5_Authentication_Type *authTLV);
 149 extern struct TLV_SHA256_Authentication_Type *eigrp_authTLV_SHA256_new(void);
 150 extern void
 151 eigrp_authTLV_SHA256_free(struct TLV_SHA256_Authentication_Type *authTLV);
 152
 153 extern int eigrp_make_md5_digest(struct eigrp_interface *ei, struct stream *s,
 154                                  uint8_t flags);
 155 extern int eigrp_check_md5_digest(struct stream *s,
 156                                   struct TLV_MD5_Authentication_Type *authTLV,
 157                                   struct eigrp_neighbor *nbr, uint8_t flags);
 158 extern int eigrp_make_sha256_digest(struct eigrp_interface *ei,
 159                                     struct stream *s, uint8_t flags);
 160 extern int
 161 eigrp_check_sha256_digest(struct stream *s,
 162                           struct TLV_SHA256_Authentication_Type *authTLV,
 163                           struct eigrp_neighbor *nbr, uint8_t flags);
 164
 165
 166 extern void
 167 eigrp_IPv4_InternalTLV_free(struct TLV_IPv4_Internal_type *IPv4_InternalTLV);
 168
 169 extern struct TLV_Sequence_Type *eigrp_SequenceTLV_new(void);
 170
 171 extern const struct message eigrp_packet_type_str[];
 172 extern const size_t eigrp_packet_type_str_max;
 173
 174 #endif /* _ZEBRA_EIGRP_PACKET_H */