1 /* 2 * Copyright (c) 1982, 1986, 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)in_pcb.h 8.1 (Berkeley) 6/10/93 34 * $FreeBSD$ 35 */ 36 37 #ifndef _NETINET_IN_PCB_H_ 38 #define _NETINET_IN_PCB_H_ 39 40 #include <sys/queue.h> 41 42 #include <net/route.h> 43 #include <netinet6/ipsec.h> /* for IPSEC */ 44 45 #define in6pcb inpcb /* for KAME src sync over BSD*'s */ 46 #define in6p_sp inp_sp /* for KAME src sync over BSD*'s */ 47 48 /* 49 * Common structure pcb for internet protocol implementation. 50 * Here are stored pointers to local and foreign host table 51 * entries, local and foreign socket numbers, and pointers 52 * up (to a socket structure) and down (to a protocol-specific) 53 * control block. 54 */ 55 LIST_HEAD(inpcbhead, inpcb); 56 LIST_HEAD(inpcbporthead, inpcbport); 57 typedef u_quad_t inp_gen_t; 58 59 /* 60 * PCB with AF_INET6 null bind'ed laddr can receive AF_INET input packet. 61 * So, AF_INET6 null laddr is also used as AF_INET null laddr, 62 * by utilize following structure. (At last, same as INRIA) 63 */ 64 struct in_addr_4in6 { 65 u_int32_t ia46_pad32[3]; 66 struct in_addr ia46_addr4; 67 }; 68 69 /* 70 * NOTE: ipv6 addrs should be 64-bit aligned, per RFC 2553. 71 * in_conninfo has some extra padding to accomplish this. 72 */ 73 struct in_endpoints { 74 u_int16_t ie_fport; /* foreign port */ 75 u_int16_t ie_lport; /* local port */ 76 /* protocol dependent part, local and foreign addr */ 77 union { 78 /* foreign host table entry */ 79 struct in_addr_4in6 ie46_foreign; 80 struct in6_addr ie6_foreign; 81 } ie_dependfaddr; 82 union { 83 /* local host table entry */ 84 struct in_addr_4in6 ie46_local; 85 struct in6_addr ie6_local; 86 } ie_dependladdr; 87 #define ie_faddr ie_dependfaddr.ie46_foreign.ia46_addr4 88 #define ie_laddr ie_dependladdr.ie46_local.ia46_addr4 89 #define ie6_faddr ie_dependfaddr.ie6_foreign 90 #define ie6_laddr ie_dependladdr.ie6_local 91 }; 92 93 /* 94 * XXX 95 * At some point struct route should possibly change to: 96 * struct rtentry *rt 97 * struct in_endpoints *ie; 98 */ 99 struct in_conninfo { 100 u_int8_t inc_flags; 101 u_int8_t inc_len; 102 u_int16_t inc_pad; /* XXX alignment for in_endpoints */ 103 /* protocol dependent part; cached route */ 104 struct in_endpoints inc_ie; 105 union { 106 /* placeholder for routing entry */ 107 struct route inc4_route; 108 struct route_in6 inc6_route; 109 } inc_dependroute; 110 }; 111 #define inc_isipv6 inc_flags /* temp compatability */ 112 #define inc_fport inc_ie.ie_fport 113 #define inc_lport inc_ie.ie_lport 114 #define inc_faddr inc_ie.ie_faddr 115 #define inc_laddr inc_ie.ie_laddr 116 #define inc_route inc_dependroute.inc4_route 117 #define inc6_faddr inc_ie.ie6_faddr 118 #define inc6_laddr inc_ie.ie6_laddr 119 #define inc6_route inc_dependroute.inc6_route 120 121 /* 122 * NB: the zone allocator is type-stable EXCEPT FOR THE FIRST TWO LONGS 123 * of the structure. Therefore, it is important that the members in 124 * that position not contain any information which is required to be 125 * stable. 126 */ 127 struct icmp6_filter; 128 129 struct inpcb { 130 LIST_ENTRY(inpcb) inp_hash; /* hash list */ 131 LIST_ENTRY(inpcb) inp_list; /* list for all PCBs of this proto */ 132 u_int32_t inp_flow; 133 134 /* local and foreign ports, local and foreign addr */ 135 struct in_conninfo inp_inc; 136 137 caddr_t inp_ppcb; /* pointer to per-protocol pcb */ 138 struct inpcbinfo *inp_pcbinfo; /* PCB list info */ 139 struct socket *inp_socket; /* back pointer to socket */ 140 /* list for this PCB's local port */ 141 int inp_flags; /* generic IP/datagram flags */ 142 143 struct inpcbpolicy *inp_sp; /* for IPSEC */ 144 u_char inp_vflag; 145 #define INP_IPV4 0x1 146 #define INP_IPV6 0x2 147 u_char inp_ip_ttl; /* time to live proto */ 148 u_char inp_ip_p; /* protocol proto */ 149 150 /* protocol dependent part; options */ 151 struct { 152 u_char inp4_ip_tos; /* type of service proto */ 153 struct mbuf *inp4_options; /* IP options */ 154 struct ip_moptions *inp4_moptions; /* IP multicast options */ 155 } inp_depend4; 156 #define inp_fport inp_inc.inc_fport 157 #define inp_lport inp_inc.inc_lport 158 #define inp_faddr inp_inc.inc_faddr 159 #define inp_laddr inp_inc.inc_laddr 160 #define inp_route inp_inc.inc_route 161 #define inp_ip_tos inp_depend4.inp4_ip_tos 162 #define inp_options inp_depend4.inp4_options 163 #define inp_moptions inp_depend4.inp4_moptions 164 struct { 165 /* IP options */ 166 struct mbuf *inp6_options; 167 /* IP6 options for outgoing packets */ 168 struct ip6_pktopts *inp6_outputopts; 169 /* IP multicast options */ 170 struct ip6_moptions *inp6_moptions; 171 /* ICMPv6 code type filter */ 172 struct icmp6_filter *inp6_icmp6filt; 173 /* IPV6_CHECKSUM setsockopt */ 174 int inp6_cksum; 175 u_short inp6_ifindex; 176 short inp6_hops; 177 u_int8_t inp6_hlim; 178 } inp_depend6; 179 LIST_ENTRY(inpcb) inp_portlist; 180 struct inpcbport *inp_phd; /* head of this list */ 181 inp_gen_t inp_gencnt; /* generation count of this instance */ 182 #define in6p_faddr inp_inc.inc6_faddr 183 #define in6p_laddr inp_inc.inc6_laddr 184 #define in6p_route inp_inc.inc6_route 185 #define in6p_ip6_hlim inp_depend6.inp6_hlim 186 #define in6p_hops inp_depend6.inp6_hops /* default hop limit */ 187 #define in6p_ip6_nxt inp_ip_p 188 #define in6p_flowinfo inp_flow 189 #define in6p_vflag inp_vflag 190 #define in6p_options inp_depend6.inp6_options 191 #define in6p_outputopts inp_depend6.inp6_outputopts 192 #define in6p_moptions inp_depend6.inp6_moptions 193 #define in6p_icmp6filt inp_depend6.inp6_icmp6filt 194 #define in6p_cksum inp_depend6.inp6_cksum 195 #define inp6_ifindex inp_depend6.inp6_ifindex 196 #define in6p_flags inp_flags /* for KAME src sync over BSD*'s */ 197 #define in6p_socket inp_socket /* for KAME src sync over BSD*'s */ 198 #define in6p_lport inp_lport /* for KAME src sync over BSD*'s */ 199 #define in6p_fport inp_fport /* for KAME src sync over BSD*'s */ 200 #define in6p_ppcb inp_ppcb /* for KAME src sync over BSD*'s */ 201 }; 202 /* 203 * The range of the generation count, as used in this implementation, 204 * is 9e19. We would have to create 300 billion connections per 205 * second for this number to roll over in a year. This seems sufficiently 206 * unlikely that we simply don't concern ourselves with that possibility. 207 */ 208 209 /* 210 * Interface exported to userland by various protocols which use 211 * inpcbs. Hack alert -- only define if struct xsocket is in scope. 212 */ 213 #ifdef _SYS_SOCKETVAR_H_ 214 struct xinpcb { 215 size_t xi_len; /* length of this structure */ 216 struct inpcb xi_inp; 217 struct xsocket xi_socket; 218 u_quad_t xi_alignment_hack; 219 }; 220 221 struct xinpgen { 222 size_t xig_len; /* length of this structure */ 223 u_int xig_count; /* number of PCBs at this time */ 224 inp_gen_t xig_gen; /* generation count at this time */ 225 so_gen_t xig_sogen; /* socket generation count at this time */ 226 }; 227 #endif /* _SYS_SOCKETVAR_H_ */ 228 229 struct inpcbport { 230 LIST_ENTRY(inpcbport) phd_hash; 231 struct inpcbhead phd_pcblist; 232 u_short phd_port; 233 }; 234 235 struct inpcbinfo { /* XXX documentation, prefixes */ 236 struct inpcbhead *hashbase; 237 u_long hashmask; 238 struct inpcbporthead *porthashbase; 239 u_long porthashmask; 240 struct inpcbhead *listhead; 241 u_short lastport; 242 u_short lastlow; 243 u_short lasthi; 244 struct vm_zone *ipi_zone; /* zone to allocate pcbs from */ 245 u_int ipi_count; /* number of pcbs in this list */ 246 u_quad_t ipi_gencnt; /* current generation count */ 247 }; 248 249 #define INP_PCBHASH(faddr, lport, fport, mask) \ 250 (((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport))) & (mask)) 251 #define INP_PCBPORTHASH(lport, mask) \ 252 (ntohs((lport)) & (mask)) 253 254 /* flags in inp_flags: */ 255 #define INP_RECVOPTS 0x01 /* receive incoming IP options */ 256 #define INP_RECVRETOPTS 0x02 /* receive IP options for reply */ 257 #define INP_RECVDSTADDR 0x04 /* receive IP dst address */ 258 #define INP_HDRINCL 0x08 /* user supplies entire IP header */ 259 #define INP_HIGHPORT 0x10 /* user wants "high" port binding */ 260 #define INP_LOWPORT 0x20 /* user wants "low" port binding */ 261 #define INP_ANONPORT 0x40 /* port chosen for user */ 262 #define INP_RECVIF 0x80 /* receive incoming interface */ 263 #define INP_MTUDISC 0x100 /* user can do MTU discovery */ 264 #define INP_FAITH 0x200 /* accept FAITH'ed connections */ 265 266 #define IN6P_IPV6_V6ONLY 0x008000 /* restrict AF_INET6 socket for v6 */ 267 268 #define IN6P_PKTINFO 0x010000 /* receive IP6 dst and I/F */ 269 #define IN6P_HOPLIMIT 0x020000 /* receive hoplimit */ 270 #define IN6P_HOPOPTS 0x040000 /* receive hop-by-hop options */ 271 #define IN6P_DSTOPTS 0x080000 /* receive dst options after rthdr */ 272 #define IN6P_RTHDR 0x100000 /* receive routing header */ 273 #define IN6P_RTHDRDSTOPTS 0x200000 /* receive dstoptions before rthdr */ 274 #define IN6P_AUTOFLOWLABEL 0x800000 /* attach flowlabel automatically */ 275 #define IN6P_BINDV6ONLY 0x10000000 /* do not grab IPv4 traffic */ 276 277 #define INP_CONTROLOPTS (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\ 278 INP_RECVIF|\ 279 IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_HOPOPTS|\ 280 IN6P_DSTOPTS|IN6P_RTHDR|IN6P_RTHDRDSTOPTS|\ 281 IN6P_AUTOFLOWLABEL) 282 #define INP_UNMAPPABLEOPTS (IN6P_HOPOPTS|IN6P_DSTOPTS|IN6P_RTHDR|\ 283 IN6P_AUTOFLOWLABEL) 284 285 /* for KAME src sync over BSD*'s */ 286 #define IN6P_HIGHPORT INP_HIGHPORT 287 #define IN6P_LOWPORT INP_LOWPORT 288 #define IN6P_ANONPORT INP_ANONPORT 289 #define IN6P_RECVIF INP_RECVIF 290 #define IN6P_MTUDISC INP_MTUDISC 291 #define IN6P_FAITH INP_FAITH 292 #define IN6P_CONTROLOPTS INP_CONTROLOPTS 293 /* 294 * socket AF version is {newer than,or include} 295 * actual datagram AF version 296 */ 297 298 #define INPLOOKUP_WILDCARD 1 299 #define sotoinpcb(so) ((struct inpcb *)(so)->so_pcb) 300 #define sotoin6pcb(so) sotoinpcb(so) /* for KAME src sync over BSD*'s */ 301 302 #define INP_SOCKAF(so) so->so_proto->pr_domain->dom_family 303 304 #define INP_CHECK_SOCKAF(so, af) (INP_SOCKAF(so) == af) 305 306 #ifdef _KERNEL 307 extern int ipport_lowfirstauto; 308 extern int ipport_lowlastauto; 309 extern int ipport_firstauto; 310 extern int ipport_lastauto; 311 extern int ipport_hifirstauto; 312 extern int ipport_hilastauto; 313 314 void in_pcbpurgeif0 __P((struct inpcb *, struct ifnet *)); 315 void in_losing __P((struct inpcb *)); 316 void in_rtchange __P((struct inpcb *, int)); 317 int in_pcballoc __P((struct socket *, struct inpcbinfo *, struct thread *)); 318 int in_pcbbind __P((struct inpcb *, struct sockaddr *, struct thread *)); 319 int in_pcbconnect __P((struct inpcb *, struct sockaddr *, struct thread *)); 320 void in_pcbdetach __P((struct inpcb *)); 321 void in_pcbdisconnect __P((struct inpcb *)); 322 int in_pcbinshash __P((struct inpcb *)); 323 int in_pcbladdr __P((struct inpcb *, struct sockaddr *, 324 struct sockaddr_in **)); 325 struct inpcb * 326 in_pcblookup_local __P((struct inpcbinfo *, 327 struct in_addr, u_int, int)); 328 struct inpcb * 329 in_pcblookup_hash __P((struct inpcbinfo *, 330 struct in_addr, u_int, struct in_addr, u_int, 331 int, struct ifnet *)); 332 void in_pcbnotifyall __P((struct inpcbhead *, struct in_addr, 333 int, void (*)(struct inpcb *, int))); 334 void in_pcbrehash __P((struct inpcb *)); 335 int in_setpeeraddr __P((struct socket *so, struct sockaddr **nam)); 336 int in_setsockaddr __P((struct socket *so, struct sockaddr **nam)); 337 void in_pcbremlists __P((struct inpcb *inp)); 338 int prison_xinpcb __P((struct proc *p, struct inpcb *inp)); 339 #endif /* _KERNEL */ 340 341 #endif /* !_NETINET_IN_PCB_H_ */ 342