1 /* 2 * Copyright (c) 2004 Jeffrey Hsu. All rights reserved. 3 * Copyright (c) 1982, 1986, 1990, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the University of 17 * California, Berkeley and its contributors. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)in_pcb.h 8.1 (Berkeley) 6/10/93 35 * $FreeBSD: src/sys/netinet/in_pcb.h,v 1.32.2.7 2003/01/24 05:11:34 sam Exp $ 36 * $DragonFly: src/sys/netinet/in_pcb.h,v 1.13 2004/04/28 08:00:35 hsu Exp $ 37 */ 38 39 #ifndef _NETINET_IN_PCB_H_ 40 #define _NETINET_IN_PCB_H_ 41 42 #include <sys/queue.h> 43 44 #include <net/route.h> 45 46 #define in6pcb inpcb /* for KAME src sync over BSD*'s */ 47 #define in6p_sp inp_sp /* for KAME src sync over BSD*'s */ 48 struct inpcbpolicy; 49 50 /* 51 * Common structure pcb for internet protocol implementation. 52 * Here are stored pointers to local and foreign host table 53 * entries, local and foreign socket numbers, and pointers 54 * up (to a socket structure) and down (to a protocol-specific) 55 * control block. 56 */ 57 LIST_HEAD(inpcbhead, inpcb); 58 LIST_HEAD(inpcbporthead, inpcbport); 59 typedef u_quad_t inp_gen_t; 60 61 struct inpcontainer { 62 struct inpcb *ic_inp; 63 LIST_ENTRY(inpcontainer) ic_list; 64 }; 65 LIST_HEAD(inpcontainerhead, inpcontainer); 66 67 /* 68 * PCB with AF_INET6 null bind'ed laddr can receive AF_INET input packet. 69 * So, AF_INET6 null laddr is also used as AF_INET null laddr, 70 * by utilize following structure. (At last, same as INRIA) 71 */ 72 struct in_addr_4in6 { 73 u_int32_t ia46_pad32[3]; 74 struct in_addr ia46_addr4; 75 }; 76 77 /* 78 * NOTE: ipv6 addrs should be 64-bit aligned, per RFC 2553. 79 * in_conninfo has some extra padding to accomplish this. 80 */ 81 struct in_endpoints { 82 u_int16_t ie_fport; /* foreign port */ 83 u_int16_t ie_lport; /* local port */ 84 /* protocol dependent part, local and foreign addr */ 85 union { 86 /* foreign host table entry */ 87 struct in_addr_4in6 ie46_foreign; 88 struct in6_addr ie6_foreign; 89 } ie_dependfaddr; 90 union { 91 /* local host table entry */ 92 struct in_addr_4in6 ie46_local; 93 struct in6_addr ie6_local; 94 } ie_dependladdr; 95 #define ie_faddr ie_dependfaddr.ie46_foreign.ia46_addr4 96 #define ie_laddr ie_dependladdr.ie46_local.ia46_addr4 97 #define ie6_faddr ie_dependfaddr.ie6_foreign 98 #define ie6_laddr ie_dependladdr.ie6_local 99 }; 100 101 /* 102 * XXX 103 * At some point struct route should possibly change to: 104 * struct rtentry *rt 105 * struct in_endpoints *ie; 106 */ 107 struct in_conninfo { 108 u_int8_t inc_flags; 109 u_int8_t inc_len; 110 u_int16_t inc_pad; /* XXX alignment for in_endpoints */ 111 /* protocol dependent part; cached route */ 112 struct in_endpoints inc_ie; 113 union { 114 /* placeholder for routing entry */ 115 struct route inc4_route; 116 struct route_in6 inc6_route; 117 } inc_dependroute; 118 }; 119 #define inc_isipv6 inc_flags /* temp compatibility */ 120 #define inc_fport inc_ie.ie_fport 121 #define inc_lport inc_ie.ie_lport 122 #define inc_faddr inc_ie.ie_faddr 123 #define inc_laddr inc_ie.ie_laddr 124 #define inc_route inc_dependroute.inc4_route 125 #define inc6_faddr inc_ie.ie6_faddr 126 #define inc6_laddr inc_ie.ie6_laddr 127 #define inc6_route inc_dependroute.inc6_route 128 129 /* 130 * NB: the zone allocator is type-stable EXCEPT FOR THE FIRST TWO LONGS 131 * of the structure. Therefore, it is important that the members in 132 * that position not contain any information which is required to be 133 * stable. 134 */ 135 struct icmp6_filter; 136 137 struct inpcb { 138 LIST_ENTRY(inpcb) inp_hash; /* hash list */ 139 LIST_ENTRY(inpcb) inp_list; /* list for all PCBs of this proto */ 140 u_int32_t inp_flow; 141 142 /* local and foreign ports, local and foreign addr */ 143 struct in_conninfo inp_inc; 144 145 caddr_t inp_ppcb; /* pointer to per-protocol pcb */ 146 struct inpcbinfo *inp_pcbinfo; /* PCB list info */ 147 struct inpcbinfo *inp_cpcbinfo;/* back pointer for connection table */ 148 struct socket *inp_socket; /* back pointer to socket */ 149 /* list for this PCB's local port */ 150 int inp_flags; /* generic IP/datagram flags */ 151 152 struct inpcbpolicy *inp_sp; /* for IPSEC */ 153 u_char inp_vflag; 154 #define INP_IPV4 0x1 155 #define INP_IPV6 0x2 156 u_char inp_ip_ttl; /* time to live proto */ 157 u_char inp_ip_p; /* protocol proto */ 158 159 /* protocol dependent part; options */ 160 struct { 161 u_char inp4_ip_tos; /* type of service proto */ 162 struct mbuf *inp4_options; /* IP options */ 163 struct ip_moptions *inp4_moptions; /* IP multicast options */ 164 } inp_depend4; 165 #define inp_fport inp_inc.inc_fport 166 #define inp_lport inp_inc.inc_lport 167 #define inp_faddr inp_inc.inc_faddr 168 #define inp_laddr inp_inc.inc_laddr 169 #define inp_route inp_inc.inc_route 170 #define inp_ip_tos inp_depend4.inp4_ip_tos 171 #define inp_options inp_depend4.inp4_options 172 #define inp_moptions inp_depend4.inp4_moptions 173 struct { 174 /* IP options */ 175 struct mbuf *inp6_options; 176 /* IP6 options for outgoing packets */ 177 struct ip6_pktopts *inp6_outputopts; 178 /* IP multicast options */ 179 struct ip6_moptions *inp6_moptions; 180 /* ICMPv6 code type filter */ 181 struct icmp6_filter *inp6_icmp6filt; 182 /* IPV6_CHECKSUM setsockopt */ 183 int inp6_cksum; 184 u_short inp6_ifindex; 185 short inp6_hops; 186 u_int8_t inp6_hlim; 187 } inp_depend6; 188 LIST_ENTRY(inpcb) inp_portlist; 189 struct inpcbport *inp_phd; /* head of this list */ 190 inp_gen_t inp_gencnt; /* generation count of this instance */ 191 #define in6p_faddr inp_inc.inc6_faddr 192 #define in6p_laddr inp_inc.inc6_laddr 193 #define in6p_route inp_inc.inc6_route 194 #define in6p_ip6_hlim inp_depend6.inp6_hlim 195 #define in6p_hops inp_depend6.inp6_hops /* default hop limit */ 196 #define in6p_ip6_nxt inp_ip_p 197 #define in6p_flowinfo inp_flow 198 #define in6p_vflag inp_vflag 199 #define in6p_options inp_depend6.inp6_options 200 #define in6p_outputopts inp_depend6.inp6_outputopts 201 #define in6p_moptions inp_depend6.inp6_moptions 202 #define in6p_icmp6filt inp_depend6.inp6_icmp6filt 203 #define in6p_cksum inp_depend6.inp6_cksum 204 #define inp6_ifindex inp_depend6.inp6_ifindex 205 #define in6p_flags inp_flags /* for KAME src sync over BSD*'s */ 206 #define in6p_socket inp_socket /* for KAME src sync over BSD*'s */ 207 #define in6p_lport inp_lport /* for KAME src sync over BSD*'s */ 208 #define in6p_fport inp_fport /* for KAME src sync over BSD*'s */ 209 #define in6p_ppcb inp_ppcb /* for KAME src sync over BSD*'s */ 210 }; 211 /* 212 * The range of the generation count, as used in this implementation, 213 * is 9e19. We would have to create 300 billion connections per 214 * second for this number to roll over in a year. This seems sufficiently 215 * unlikely that we simply don't concern ourselves with that possibility. 216 */ 217 218 /* 219 * Interface exported to userland by various protocols which use 220 * inpcbs. Hack alert -- only define if struct xsocket is in scope. 221 */ 222 #ifdef _SYS_SOCKETVAR_H_ 223 struct xinpcb { 224 size_t xi_len; /* length of this structure */ 225 struct inpcb xi_inp; 226 struct xsocket xi_socket; 227 u_quad_t xi_alignment_hack; 228 }; 229 230 struct xinpgen { 231 size_t xig_len; /* length of this structure */ 232 u_int xig_count; /* number of PCBs at this time */ 233 inp_gen_t xig_gen; /* generation count at this time */ 234 so_gen_t xig_sogen; /* socket generation count at this time */ 235 }; 236 #endif /* _SYS_SOCKETVAR_H_ */ 237 238 struct inpcbport { 239 LIST_ENTRY(inpcbport) phd_hash; 240 struct inpcbhead phd_pcblist; 241 u_short phd_port; 242 }; 243 244 struct inpcbinfo { /* XXX documentation, prefixes */ 245 struct inpcbhead *hashbase; 246 u_long hashmask; 247 struct inpcbporthead *porthashbase; 248 u_long porthashmask; 249 struct inpcontainerhead *wildcardhashbase; 250 u_long wildcardhashmask; 251 struct inpcbhead listhead; /* head of queue of active pcb's */ 252 u_short lastport; 253 u_short lastlow; 254 u_short lasthi; 255 struct vm_zone *ipi_zone; /* zone to allocate pcbs from */ 256 u_int ipi_count; /* number of pcbs in this list */ 257 u_quad_t ipi_gencnt; /* current generation count */ 258 }; 259 260 261 #define INP_PCBCONNHASH(faddr, fport, laddr, lport, mask) \ 262 (((faddr) ^ ((faddr) >> 16) ^ (laddr) ^ ntohs((lport) ^ (fport))) & (mask)) 263 264 #define INP_PCBPORTHASH(lport, mask) (ntohs(lport) & (mask)) 265 266 #define INP_PCBWILDCARDHASH(lport, mask) (ntohs(lport) & (mask)) 267 268 /* flags in inp_flags: */ 269 #define INP_RECVOPTS 0x01 /* receive incoming IP options */ 270 #define INP_RECVRETOPTS 0x02 /* receive IP options for reply */ 271 #define INP_RECVDSTADDR 0x04 /* receive IP dst address */ 272 #define INP_HDRINCL 0x08 /* user supplies entire IP header */ 273 #define INP_HIGHPORT 0x10 /* user wants "high" port binding */ 274 #define INP_LOWPORT 0x20 /* user wants "low" port binding */ 275 #define INP_ANONPORT 0x40 /* port chosen for user */ 276 #define INP_RECVIF 0x80 /* receive incoming interface */ 277 #define INP_MTUDISC 0x100 /* user can do MTU discovery */ 278 #define INP_FAITH 0x200 /* accept FAITH'ed connections */ 279 #define INP_WILDCARD 0x400 /* wildcard match */ 280 #define INP_WILDCARD_MP 0x800 /* distributed wildcard match */ 281 #define INP_CONNECTED 0x1000 /* exact match */ 282 #define INP_WASBOUND_NOTANY 0x2000 /* was bound to non-null laddr */ 283 284 #define IN6P_IPV6_V6ONLY 0x008000 /* restrict AF_INET6 socket for v6 */ 285 286 #define IN6P_PKTINFO 0x010000 /* receive IP6 dst and I/F */ 287 #define IN6P_HOPLIMIT 0x020000 /* receive hoplimit */ 288 #define IN6P_HOPOPTS 0x040000 /* receive hop-by-hop options */ 289 #define IN6P_DSTOPTS 0x080000 /* receive dst options after rthdr */ 290 #define IN6P_RTHDR 0x100000 /* receive routing header */ 291 #define IN6P_RTHDRDSTOPTS 0x200000 /* receive dstoptions before rthdr */ 292 #define IN6P_AUTOFLOWLABEL 0x800000 /* attach flowlabel automatically */ 293 294 #define INP_CONTROLOPTS (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\ 295 INP_RECVIF|\ 296 IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_HOPOPTS|\ 297 IN6P_DSTOPTS|IN6P_RTHDR|IN6P_RTHDRDSTOPTS|\ 298 IN6P_AUTOFLOWLABEL) 299 #define INP_UNMAPPABLEOPTS (IN6P_HOPOPTS|IN6P_DSTOPTS|IN6P_RTHDR|\ 300 IN6P_AUTOFLOWLABEL) 301 302 /* for KAME src sync over BSD*'s */ 303 #define IN6P_HIGHPORT INP_HIGHPORT 304 #define IN6P_LOWPORT INP_LOWPORT 305 #define IN6P_ANONPORT INP_ANONPORT 306 #define IN6P_RECVIF INP_RECVIF 307 #define IN6P_MTUDISC INP_MTUDISC 308 #define IN6P_FAITH INP_FAITH 309 #define IN6P_CONTROLOPTS INP_CONTROLOPTS 310 /* 311 * socket AF version is {newer than,or include} 312 * actual datagram AF version 313 */ 314 315 #define INPLOOKUP_WILDCARD 1 316 #define sotoinpcb(so) ((struct inpcb *)(so)->so_pcb) 317 #define sotoin6pcb(so) sotoinpcb(so) /* for KAME src sync over BSD*'s */ 318 319 #define INP_SOCKAF(so) so->so_proto->pr_domain->dom_family 320 321 #define INP_CHECK_SOCKAF(so, af) (INP_SOCKAF(so) == af) 322 323 #ifdef _KERNEL 324 extern int ipport_lowfirstauto; 325 extern int ipport_lowlastauto; 326 extern int ipport_firstauto; 327 extern int ipport_lastauto; 328 extern int ipport_hifirstauto; 329 extern int ipport_hilastauto; 330 331 void in_pcbpurgeif0 (struct inpcb *, struct ifnet *); 332 void in_losing (struct inpcb *); 333 void in_rtchange (struct inpcb *, int); 334 int in_pcballoc (struct socket *, struct inpcbinfo *); 335 int in_pcbbind (struct inpcb *, struct sockaddr *, struct thread *); 336 int in_pcbconnect (struct inpcb *, struct sockaddr *, struct thread *); 337 void in_pcbdetach (struct inpcb *); 338 void in_pcbdisconnect (struct inpcb *); 339 void in_pcbinswildcardhash(struct inpcb *inp); 340 void in_pcbinswildcardhash_oncpu(struct inpcb *, struct inpcbinfo *); 341 void in_pcbinsconnhash(struct inpcb *inp); 342 int in_pcbinsporthash (struct inpcb *); 343 int in_pcbladdr (struct inpcb *, struct sockaddr *, 344 struct sockaddr_in **); 345 struct inpcb * 346 in_pcblookup_local (struct inpcbinfo *, 347 struct in_addr, u_int, int); 348 struct inpcb * 349 in_pcblookup_hash (struct inpcbinfo *, 350 struct in_addr, u_int, struct in_addr, u_int, 351 int, struct ifnet *); 352 void in_pcbnotifyall (struct inpcbhead *, struct in_addr, 353 int, void (*)(struct inpcb *, int)); 354 int in_setpeeraddr (struct socket *so, struct sockaddr **nam); 355 int in_setsockaddr (struct socket *so, struct sockaddr **nam); 356 void in_pcbremwildcardhash(struct inpcb *inp); 357 void in_pcbremwildcardhash_oncpu(struct inpcb *, struct inpcbinfo *); 358 void in_pcbremconnhash(struct inpcb *inp); 359 void in_pcbremlists (struct inpcb *inp); 360 int prison_xinpcb (struct thread *p, struct inpcb *inp); 361 #endif /* _KERNEL */ 362 363 #endif /* !_NETINET_IN_PCB_H_ */ 364