1 /*- 2 * Copyright (c) 2001-2002 Packet Design, LLC. 3 * All rights reserved. 4 * 5 * Subject to the following obligations and disclaimer of warranty, 6 * use and redistribution of this software, in source or object code 7 * forms, with or without modifications are expressly permitted by 8 * Packet Design; provided, however, that: 9 * 10 * (i) Any and all reproductions of the source or object code 11 * must include the copyright notice above and the following 12 * disclaimer of warranties; and 13 * (ii) No rights are granted, in any manner or form, to use 14 * Packet Design trademarks, including the mark "PACKET DESIGN" 15 * on advertising, endorsements, or otherwise except as such 16 * appears in the above copyright notice or in the software. 17 * 18 * THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND 19 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO 20 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING 21 * THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED 22 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, 23 * OR NON-INFRINGEMENT. PACKET DESIGN DOES NOT WARRANT, GUARANTEE, 24 * OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS 25 * OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, 26 * RELIABILITY OR OTHERWISE. IN NO EVENT SHALL PACKET DESIGN BE 27 * LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE 28 * OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT, 29 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL 30 * DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF 31 * USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF 32 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 34 * THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF 35 * THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * Author: Archie Cobbs <archie@freebsd.org> 38 */ 39 40 #ifndef _NETGRAPH_NG_L2TP_H_ 41 #define _NETGRAPH_NG_L2TP_H_ 42 43 /* Node type name and magic cookie */ 44 #define NG_L2TP_NODE_TYPE "l2tp" 45 #define NGM_L2TP_COOKIE 1091515793 46 47 /* Hook names */ 48 #define NG_L2TP_HOOK_CTRL "ctrl" /* control channel hook */ 49 #define NG_L2TP_HOOK_LOWER "lower" /* hook to lower layers */ 50 51 /* Session hooks: prefix plus hex session ID, e.g., "session_3e14" */ 52 #define NG_L2TP_HOOK_SESSION_P "session_" /* session data hook (prefix) */ 53 #define NG_L2TP_HOOK_SESSION_F "session_%04x" /* session data hook (format) */ 54 55 /* Set initial sequence numbers to not yet enabled node. */ 56 struct ng_l2tp_seq_config { 57 u_int16_t ns; /* sequence number to send next */ 58 u_int16_t nr; /* sequence number to be recved next */ 59 u_int16_t rack; /* last 'nr' received */ 60 u_int16_t xack; /* last 'nr' sent */ 61 }; 62 63 /* Keep this in sync with the above structure definition. */ 64 #define NG_L2TP_SEQ_CONFIG_TYPE_INFO { \ 65 { "ns", &ng_parse_uint16_type }, \ 66 { "nr", &ng_parse_uint16_type }, \ 67 { NULL } \ 68 } 69 70 /* Configuration for a node */ 71 struct ng_l2tp_config { 72 u_char enabled; /* enables traffic flow */ 73 u_char match_id; /* tunnel id must match 'tunnel_id' */ 74 u_int16_t tunnel_id; /* local tunnel id */ 75 u_int16_t peer_id; /* peer's tunnel id */ 76 u_int16_t peer_win; /* peer's max recv window size */ 77 u_int16_t rexmit_max; /* max retransmits before failure */ 78 u_int16_t rexmit_max_to; /* max delay between retransmits */ 79 }; 80 81 /* Keep this in sync with the above structure definition */ 82 #define NG_L2TP_CONFIG_TYPE_INFO { \ 83 { "enabled", &ng_parse_uint8_type }, \ 84 { "match_id", &ng_parse_uint8_type }, \ 85 { "tunnel_id", &ng_parse_hint16_type }, \ 86 { "peer_id", &ng_parse_hint16_type }, \ 87 { "peer_win", &ng_parse_uint16_type }, \ 88 { "rexmit_max", &ng_parse_uint16_type }, \ 89 { "rexmit_max_to", &ng_parse_uint16_type }, \ 90 { NULL } \ 91 } 92 93 /* Configuration for a session hook */ 94 struct ng_l2tp_sess_config { 95 u_int16_t session_id; /* local session id */ 96 u_int16_t peer_id; /* peer's session id */ 97 u_char control_dseq; /* whether we control data sequencing */ 98 u_char enable_dseq; /* whether to enable data sequencing */ 99 u_char include_length; /* whether to include length field */ 100 }; 101 102 /* Keep this in sync with the above structure definition */ 103 #define NG_L2TP_SESS_CONFIG_TYPE_INFO { \ 104 { "session_id", &ng_parse_hint16_type }, \ 105 { "peer_id", &ng_parse_hint16_type }, \ 106 { "control_dseq", &ng_parse_uint8_type }, \ 107 { "enable_dseq", &ng_parse_uint8_type }, \ 108 { "include_length", &ng_parse_uint8_type }, \ 109 { NULL } \ 110 } 111 112 /* Statistics struct */ 113 struct ng_l2tp_stats { 114 u_int32_t xmitPackets; /* number of packets xmit */ 115 u_int32_t xmitOctets; /* number of octets xmit */ 116 u_int32_t xmitZLBs; /* ack-only packets transmitted */ 117 u_int32_t xmitDrops; /* xmits dropped due to full window */ 118 u_int32_t xmitTooBig; /* ctrl pkts dropped because too big */ 119 u_int32_t xmitInvalid; /* ctrl packets with no session ID */ 120 u_int32_t xmitDataTooBig; /* data pkts dropped because too big */ 121 u_int32_t xmitRetransmits; /* retransmitted packets */ 122 u_int32_t recvPackets; /* number of packets rec'd */ 123 u_int32_t recvOctets; /* number of octets rec'd */ 124 u_int32_t recvRunts; /* too short packets rec'd */ 125 u_int32_t recvInvalid; /* invalid packets rec'd */ 126 u_int32_t recvWrongTunnel; /* packets rec'd with wrong tunnel id */ 127 u_int32_t recvUnknownSID; /* pkts rec'd with unknown session id */ 128 u_int32_t recvBadAcks; /* ctrl pkts rec'd with invalid 'nr' */ 129 u_int32_t recvOutOfOrder; /* out of order ctrl pkts rec'd */ 130 u_int32_t recvDuplicates; /* duplicate ctrl pkts rec'd */ 131 u_int32_t recvDataDrops; /* dup/out of order data pkts rec'd */ 132 u_int32_t recvZLBs; /* ack-only packets rec'd */ 133 u_int32_t memoryFailures; /* times we couldn't allocate memory */ 134 }; 135 136 /* Keep this in sync with the above structure definition */ 137 #define NG_L2TP_STATS_TYPE_INFO { \ 138 { "xmitPackets", &ng_parse_uint32_type }, \ 139 { "xmitOctets", &ng_parse_uint32_type }, \ 140 { "xmitZLBs", &ng_parse_uint32_type }, \ 141 { "xmitDrops", &ng_parse_uint32_type }, \ 142 { "xmitTooBig", &ng_parse_uint32_type }, \ 143 { "xmitInvalid", &ng_parse_uint32_type }, \ 144 { "xmitDataTooBig", &ng_parse_uint32_type }, \ 145 { "xmitRetransmits", &ng_parse_uint32_type }, \ 146 { "recvPackets", &ng_parse_uint32_type }, \ 147 { "recvOctets", &ng_parse_uint32_type }, \ 148 { "recvRunts", &ng_parse_uint32_type }, \ 149 { "recvInvalid", &ng_parse_uint32_type }, \ 150 { "recvWrongTunnel", &ng_parse_uint32_type }, \ 151 { "recvUnknownSID", &ng_parse_uint32_type }, \ 152 { "recvBadAcks", &ng_parse_uint32_type }, \ 153 { "recvOutOfOrder", &ng_parse_uint32_type }, \ 154 { "recvDuplicates", &ng_parse_uint32_type }, \ 155 { "recvDataDrops", &ng_parse_uint32_type }, \ 156 { "recvZLBs", &ng_parse_uint32_type }, \ 157 { "memoryFailures", &ng_parse_uint32_type }, \ 158 { NULL } \ 159 } 160 161 /* Session statistics struct. */ 162 struct ng_l2tp_session_stats { 163 u_int64_t xmitPackets; /* number of packets xmit */ 164 u_int64_t xmitOctets; /* number of octets xmit */ 165 u_int64_t recvPackets; /* number of packets received */ 166 u_int64_t recvOctets; /* number of octets received */ 167 }; 168 169 /* Keep this in sync with the above structure definition. */ 170 #define NG_L2TP_SESSION_STATS_TYPE_INFO { \ 171 { "xmitPackets", &ng_parse_uint64_type }, \ 172 { "xmitOctets", &ng_parse_uint64_type }, \ 173 { "recvPackets", &ng_parse_uint64_type }, \ 174 { "recvOctets", &ng_parse_uint64_type }, \ 175 { NULL } \ 176 } 177 178 /* Netgraph commands */ 179 enum { 180 NGM_L2TP_SET_CONFIG = 1, /* supply a struct ng_l2tp_config */ 181 NGM_L2TP_GET_CONFIG, /* returns a struct ng_l2tp_config */ 182 NGM_L2TP_SET_SESS_CONFIG, /* supply struct ng_l2tp_sess_config */ 183 NGM_L2TP_GET_SESS_CONFIG, /* supply a session id (u_int16_t) */ 184 NGM_L2TP_GET_STATS, /* returns struct ng_l2tp_stats */ 185 NGM_L2TP_CLR_STATS, /* clears stats */ 186 NGM_L2TP_GETCLR_STATS, /* returns & clears stats */ 187 NGM_L2TP_GET_SESSION_STATS, /* returns session stats */ 188 NGM_L2TP_CLR_SESSION_STATS, /* clears session stats */ 189 NGM_L2TP_GETCLR_SESSION_STATS, /* returns & clears session stats */ 190 NGM_L2TP_ACK_FAILURE, /* sent *from* node after ack timeout */ 191 NGM_L2TP_SET_SEQ /* supply a struct ng_l2tp_seq_config */ 192 }; 193 194 #endif /* _NETGRAPH_NG_L2TP_H_ */ 195