1 /* $OpenBSD: pipex.h,v 1.33 2022/07/12 08:58:53 mvs Exp $ */ 2 3 /* 4 * Copyright (c) 2009 Internet Initiative Japan Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef NET_PIPEX_H 30 #define NET_PIPEX_H 1 31 32 /* 33 * Names for pipex sysctl objects 34 */ 35 #define PIPEXCTL_ENABLE 1 36 #define PIPEXCTL_MAXID 2 37 38 #define PIPEXCTL_NAMES { \ 39 { 0, 0 }, \ 40 { "enable", CTLTYPE_INT }, \ 41 } 42 43 #define PIPEX_PROTO_L2TP 1 /* protocol L2TP */ 44 #define PIPEX_PROTO_PPTP 2 /* protocol PPTP */ 45 #define PIPEX_PROTO_PPPOE 3 /* protocol PPPoE */ 46 #define PIPEX_MAX_LISTREQ 128 /* list request size */ 47 #define PIPEX_MPPE_KEYLEN 16 48 49 /* pipex_mppe */ 50 struct pipex_mppe_req { 51 int16_t stateless; /* mppe key mode. 52 1 for stateless */ 53 int16_t keylenbits; /* mppe key length(in bits)*/ 54 u_char master_key[PIPEX_MPPE_KEYLEN]; /* mppe master key */ 55 }; 56 57 /* pipex statistics */ 58 struct pipex_statistics { 59 uint32_t ipackets; /* packets received from tunnel */ 60 uint32_t ierrors; /* error packets received from tunnel */ 61 uint64_t ibytes; /* number of received bytes from tunnel */ 62 uint32_t opackets; /* packets sent to tunnel */ 63 uint32_t oerrors; /* error packets on sending to tunnel */ 64 uint64_t obytes; /* number of sent bytes to tunnel */ 65 66 uint32_t idle_time; /* idle time in seconds */ 67 }; 68 69 struct pipex_session_req { 70 int pr_protocol; /* tunnel protocol */ 71 /* u_int pr_rdomain; */ /* rdomain id */ 72 uint16_t pr_session_id; /* session-id */ 73 uint16_t pr_peer_session_id; /* peer's session-id */ 74 uint32_t pr_ppp_flags; /* PPP configuration flags */ 75 #define PIPEX_PPP_ACFC_ACCEPTED 0x0001 /* ACFC accepted */ 76 #define PIPEX_PPP_PFC_ACCEPTED 0x0002 /* PFC accepted */ 77 #define PIPEX_PPP_ACFC_ENABLED 0x0004 /* ACFC enabled */ 78 #define PIPEX_PPP_PFC_ENABLED 0x0008 /* PFC enabled */ 79 #define PIPEX_PPP_MPPE_ACCEPTED 0x0010 /* MPPE accepted */ 80 #define PIPEX_PPP_MPPE_ENABLED 0x0020 /* MPPE enabled */ 81 #define PIPEX_PPP_MPPE_REQUIRED 0x0040 /* MPPE is required */ 82 #define PIPEX_PPP_HAS_ACF 0x0080 /* has ACF */ 83 #define PIPEX_PPP_ADJUST_TCPMSS 0x0100 /* do tcpmss adjustment */ 84 #define PIPEX_PPP_INGRESS_FILTER 0x0200 /* do ingress filter */ 85 int8_t pr_ccp_id; /* CCP current packet id */ 86 int pr_ppp_id; /* PPP Id. */ 87 uint16_t pr_peer_mru; /* Peer's MRU */ 88 uint32_t pr_timeout_sec; /* Idle Timer */ 89 90 struct in_addr pr_ip_srcaddr; /* local framed IP-Address */ 91 struct in_addr pr_ip_address; /* framed IP-Address */ 92 struct in_addr pr_ip_netmask; /* framed IP-Netmask */ 93 struct sockaddr_in6 pr_ip6_address; /* framed IPv6-Address */ 94 int pr_ip6_prefixlen; /* framed IPv6-Prefixlen */ 95 union { 96 struct { 97 uint32_t snd_nxt; /* send next */ 98 uint32_t rcv_nxt; /* receive next */ 99 uint32_t snd_una; /* unacked */ 100 uint32_t rcv_acked; /* recv acked */ 101 int winsz; /* window size */ 102 int maxwinsz; /* max window size */ 103 int peer_maxwinsz; /* peer's max window size */ 104 } pptp; 105 struct { 106 uint32_t option_flags; 107 #define PIPEX_L2TP_USE_SEQUENCING 0x00000001 108 109 uint16_t tunnel_id; /* our tunnel-id */ 110 uint16_t peer_tunnel_id;/* peer's tunnel-id */ 111 uint32_t ns_nxt; /* send next */ 112 uint32_t nr_nxt; /* receive next */ 113 uint32_t ns_una; /* unacked */ 114 uint32_t nr_acked; /* recv acked */ 115 uint32_t ipsecflowinfo; /* IPsec flow id for NAT-T */ 116 } l2tp; 117 struct { 118 char over_ifname[IF_NAMESIZE]; /* ethernet ifname */ 119 } pppoe; 120 } pr_proto; 121 struct sockaddr_storage pr_peer_address; /* peer address of tunnel */ 122 struct sockaddr_storage pr_local_address; /* our address of tunnel */ 123 struct pipex_mppe_req pr_mppe_recv; /* mppe key for receive */ 124 struct pipex_mppe_req pr_mppe_send; /* mppe key for send */ 125 }; 126 127 struct pipex_session_stat_req { 128 int psr_protocol; /* tunnel protocol */ 129 uint16_t psr_session_id; /* session-id */ 130 struct pipex_statistics psr_stat; /* statistics */ 131 }; 132 struct pipex_session_close_req { 133 int psr_protocol; /* tunnel protocol */ 134 uint16_t psr_session_id; /* session-id */ 135 struct pipex_statistics psr_stat; /* statistics */ 136 }; 137 #define pcr_protocol psr_protocol 138 #define pcr_session_id psr_session_id 139 #define pcr_stat psr_stat 140 141 struct pipex_session_list_req { 142 uint8_t plr_flags; 143 #define PIPEX_LISTREQ_MORE 0x01 144 int plr_ppp_id_count; /* count of PPP id */ 145 int plr_ppp_id[PIPEX_MAX_LISTREQ]; /* PPP id */ 146 }; 147 148 /* for pppx(4) */ 149 struct pppx_hdr { 150 u_int32_t pppx_proto; /* write: protocol in PIPEX_PROTO_ */ 151 u_int32_t pppx_id; /* write: session_id, read: ppp_id */ 152 }; 153 154 struct pipex_session_descr_req { 155 int pdr_protocol; /* tunnel protocol */ 156 uint16_t pdr_session_id; /* session-id */ 157 char pdr_descr[IFDESCRSIZE]; /* description */ 158 }; 159 160 161 /* PIPEX ioctls */ 162 #define PIPEXASESSION _IOW ('p', 3, struct pipex_session_req) 163 #define PIPEXDSESSION _IOWR('p', 4, struct pipex_session_close_req) 164 #define PIPEXGSTAT _IOWR('p', 6, struct pipex_session_stat_req) 165 #define PIPEXGCLOSED _IOR ('p', 7, struct pipex_session_list_req) 166 #define PIPEXSIFDESCR _IOW ('p', 8, struct pipex_session_descr_req) 167 168 #ifdef _KERNEL 169 extern int pipex_enable; 170 171 struct pipex_session; 172 173 __BEGIN_DECLS 174 void pipex_init (void); 175 176 struct pipex_session *pipex_pppoe_lookup_session (struct mbuf *); 177 struct mbuf *pipex_pppoe_input (struct mbuf *, struct pipex_session *); 178 struct pipex_session *pipex_pptp_lookup_session (struct mbuf *); 179 struct mbuf *pipex_pptp_input (struct mbuf *, struct pipex_session *); 180 struct pipex_session *pipex_pptp_userland_lookup_session_ipv4 (struct mbuf *, struct in_addr); 181 struct pipex_session *pipex_pptp_userland_lookup_session_ipv6 (struct mbuf *, struct in6_addr); 182 struct pipex_session *pipex_l2tp_userland_lookup_session(struct mbuf *, struct sockaddr *); 183 struct mbuf *pipex_pptp_userland_output (struct mbuf *, struct pipex_session *); 184 struct pipex_session *pipex_l2tp_lookup_session (struct mbuf *, int); 185 struct mbuf *pipex_l2tp_input (struct mbuf *, int off, struct pipex_session *, uint32_t); 186 struct pipex_session *pipex_l2tp_userland_lookup_session_ipv4 (struct mbuf *, struct in_addr); 187 struct pipex_session *pipex_l2tp_userland_lookup_session_ipv6 (struct mbuf *, struct in6_addr); 188 struct mbuf *pipex_l2tp_userland_output (struct mbuf *, struct pipex_session *); 189 void pipex_rele_session(struct pipex_session *); 190 int pipex_ioctl (void *, u_long, caddr_t); 191 void pipex_session_init_mppe_recv(struct pipex_session *, int, 192 int, u_char *); 193 void pipex_session_init_mppe_send(struct pipex_session *, int, 194 int, u_char *); 195 196 __END_DECLS 197 198 #endif /* _KERNEL */ 199 #endif 200