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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)in_pcb.h 8.1 (Berkeley) 6/10/93 30 * $FreeBSD$ 31 */ 32 33 #ifndef _NETINET_IN_PCB_H_ 34 #define _NETINET_IN_PCB_H_ 35 36 #include <sys/queue.h> 37 #include <sys/_lock.h> 38 #include <sys/_mutex.h> 39 40 #include <net/route.h> 41 42 #define in6pcb inpcb /* for KAME src sync over BSD*'s */ 43 #define in6p_sp inp_sp /* for KAME src sync over BSD*'s */ 44 struct inpcbpolicy; 45 46 /* 47 * Common structure pcb for internet protocol implementation. 48 * Here are stored pointers to local and foreign host table 49 * entries, local and foreign socket numbers, and pointers 50 * up (to a socket structure) and down (to a protocol-specific) 51 * control block. 52 */ 53 LIST_HEAD(inpcbhead, inpcb); 54 LIST_HEAD(inpcbporthead, inpcbport); 55 typedef u_quad_t inp_gen_t; 56 57 /* 58 * PCB with AF_INET6 null bind'ed laddr can receive AF_INET input packet. 59 * So, AF_INET6 null laddr is also used as AF_INET null laddr, 60 * by utilize following structure. (At last, same as INRIA) 61 */ 62 struct in_addr_4in6 { 63 u_int32_t ia46_pad32[3]; 64 struct in_addr ia46_addr4; 65 }; 66 67 /* 68 * NOTE: ipv6 addrs should be 64-bit aligned, per RFC 2553. 69 * in_conninfo has some extra padding to accomplish this. 70 */ 71 struct in_endpoints { 72 u_int16_t ie_fport; /* foreign port */ 73 u_int16_t ie_lport; /* local port */ 74 /* protocol dependent part, local and foreign addr */ 75 union { 76 /* foreign host table entry */ 77 struct in_addr_4in6 ie46_foreign; 78 struct in6_addr ie6_foreign; 79 } ie_dependfaddr; 80 union { 81 /* local host table entry */ 82 struct in_addr_4in6 ie46_local; 83 struct in6_addr ie6_local; 84 } ie_dependladdr; 85 #define ie_faddr ie_dependfaddr.ie46_foreign.ia46_addr4 86 #define ie_laddr ie_dependladdr.ie46_local.ia46_addr4 87 #define ie6_faddr ie_dependfaddr.ie6_foreign 88 #define ie6_laddr ie_dependladdr.ie6_local 89 }; 90 91 /* 92 * XXX 93 * the defines for inc_* are hacks and should be changed to direct references 94 */ 95 struct in_conninfo { 96 u_int8_t inc_flags; 97 u_int8_t inc_len; 98 u_int16_t inc_pad; /* XXX alignment for in_endpoints */ 99 /* protocol dependent part */ 100 struct in_endpoints inc_ie; 101 }; 102 #define inc_isipv6 inc_flags /* temp compatability */ 103 #define inc_fport inc_ie.ie_fport 104 #define inc_lport inc_ie.ie_lport 105 #define inc_faddr inc_ie.ie_faddr 106 #define inc_laddr inc_ie.ie_laddr 107 #define inc6_faddr inc_ie.ie6_faddr 108 #define inc6_laddr inc_ie.ie6_laddr 109 110 struct icmp6_filter; 111 112 struct inpcb { 113 LIST_ENTRY(inpcb) inp_hash; /* hash list */ 114 LIST_ENTRY(inpcb) inp_list; /* list for all PCBs of this proto */ 115 u_int32_t inp_flow; 116 117 /* local and foreign ports, local and foreign addr */ 118 struct in_conninfo inp_inc; 119 120 void *inp_ppcb; /* pointer to per-protocol pcb */ 121 struct inpcbinfo *inp_pcbinfo; /* PCB list info */ 122 struct socket *inp_socket; /* back pointer to socket */ 123 /* list for this PCB's local port */ 124 struct label *inp_label; /* MAC label */ 125 int inp_flags; /* generic IP/datagram flags */ 126 127 struct inpcbpolicy *inp_sp; /* for IPSEC */ 128 u_char inp_vflag; /* IP version flag (v4/v6) */ 129 #define INP_IPV4 0x1 130 #define INP_IPV6 0x2 131 #define INP_IPV6PROTO 0x4 /* opened under IPv6 protocol */ 132 #define INP_TIMEWAIT 0x8 /* .. probably doesn't go here */ 133 #define INP_ONESBCAST 0x10 /* send all-ones broadcast */ 134 #define INP_DROPPED 0x20 /* protocol drop flag */ 135 #define INP_SOCKREF 0x40 /* strong socket reference */ 136 u_char inp_ip_ttl; /* time to live proto */ 137 u_char inp_ip_p; /* protocol proto */ 138 u_char inp_ip_minttl; /* minimum TTL or drop */ 139 140 /* protocol dependent part; options */ 141 struct { 142 u_char inp4_ip_tos; /* type of service proto */ 143 struct mbuf *inp4_options; /* IP options */ 144 struct ip_moptions *inp4_moptions; /* IP multicast options */ 145 } inp_depend4; 146 #define inp_fport inp_inc.inc_fport 147 #define inp_lport inp_inc.inc_lport 148 #define inp_faddr inp_inc.inc_faddr 149 #define inp_laddr inp_inc.inc_laddr 150 #define inp_ip_tos inp_depend4.inp4_ip_tos 151 #define inp_options inp_depend4.inp4_options 152 #define inp_moptions inp_depend4.inp4_moptions 153 struct { 154 /* IP options */ 155 struct mbuf *inp6_options; 156 /* IP6 options for outgoing packets */ 157 struct ip6_pktopts *inp6_outputopts; 158 /* IP multicast options */ 159 struct ip6_moptions *inp6_moptions; 160 /* ICMPv6 code type filter */ 161 struct icmp6_filter *inp6_icmp6filt; 162 /* IPV6_CHECKSUM setsockopt */ 163 int inp6_cksum; 164 u_short inp6_ifindex; 165 short inp6_hops; 166 } inp_depend6; 167 LIST_ENTRY(inpcb) inp_portlist; 168 struct inpcbport *inp_phd; /* head of this list */ 169 #define inp_zero_size offsetof(struct inpcb, inp_gencnt) 170 inp_gen_t inp_gencnt; /* generation count of this instance */ 171 struct mtx inp_mtx; 172 173 #define in6p_faddr inp_inc.inc6_faddr 174 #define in6p_laddr inp_inc.inc6_laddr 175 #define in6p_ip6_hlim inp_depend6.inp6_hlim 176 #define in6p_hops inp_depend6.inp6_hops /* default hop limit */ 177 #define in6p_ip6_nxt inp_ip_p 178 #define in6p_flowinfo inp_flow 179 #define in6p_vflag inp_vflag 180 #define in6p_options inp_depend6.inp6_options 181 #define in6p_outputopts inp_depend6.inp6_outputopts 182 #define in6p_moptions inp_depend6.inp6_moptions 183 #define in6p_icmp6filt inp_depend6.inp6_icmp6filt 184 #define in6p_cksum inp_depend6.inp6_cksum 185 #define inp6_ifindex inp_depend6.inp6_ifindex 186 #define in6p_flags inp_flags /* for KAME src sync over BSD*'s */ 187 #define in6p_socket inp_socket /* for KAME src sync over BSD*'s */ 188 #define in6p_lport inp_lport /* for KAME src sync over BSD*'s */ 189 #define in6p_fport inp_fport /* for KAME src sync over BSD*'s */ 190 #define in6p_ppcb inp_ppcb /* for KAME src sync over BSD*'s */ 191 }; 192 /* 193 * The range of the generation count, as used in this implementation, 194 * is 9e19. We would have to create 300 billion connections per 195 * second for this number to roll over in a year. This seems sufficiently 196 * unlikely that we simply don't concern ourselves with that possibility. 197 */ 198 199 /* 200 * Interface exported to userland by various protocols which use 201 * inpcbs. Hack alert -- only define if struct xsocket is in scope. 202 */ 203 #ifdef _SYS_SOCKETVAR_H_ 204 struct xinpcb { 205 size_t xi_len; /* length of this structure */ 206 struct inpcb xi_inp; 207 struct xsocket xi_socket; 208 u_quad_t xi_alignment_hack; 209 }; 210 211 struct xinpgen { 212 size_t xig_len; /* length of this structure */ 213 u_int xig_count; /* number of PCBs at this time */ 214 inp_gen_t xig_gen; /* generation count at this time */ 215 so_gen_t xig_sogen; /* socket generation count at this time */ 216 }; 217 #endif /* _SYS_SOCKETVAR_H_ */ 218 219 struct inpcbport { 220 LIST_ENTRY(inpcbport) phd_hash; 221 struct inpcbhead phd_pcblist; 222 u_short phd_port; 223 }; 224 225 struct inpcbinfo { /* XXX documentation, prefixes */ 226 struct inpcbhead *hashbase; 227 u_long hashmask; 228 struct inpcbporthead *porthashbase; 229 u_long porthashmask; 230 struct inpcbhead *listhead; 231 u_short lastport; 232 u_short lastlow; 233 u_short lasthi; 234 struct uma_zone *ipi_zone; /* zone to allocate pcbs from */ 235 u_int ipi_count; /* number of pcbs in this list */ 236 u_quad_t ipi_gencnt; /* current generation count */ 237 struct mtx ipi_mtx; 238 }; 239 240 /* 241 * NB: We cannot enable assertions when IPv6 is configured as 242 * this code is shared by both IPv4 and IPv6 and IPv6 is 243 * not properly locked. 244 */ 245 #define INP_LOCK_INIT(inp, d, t) \ 246 mtx_init(&(inp)->inp_mtx, (d), (t), MTX_DEF | MTX_RECURSE | MTX_DUPOK) 247 #define INP_LOCK_DESTROY(inp) mtx_destroy(&(inp)->inp_mtx) 248 #define INP_LOCK(inp) mtx_lock(&(inp)->inp_mtx) 249 #define INP_UNLOCK(inp) mtx_unlock(&(inp)->inp_mtx) 250 #define INP_LOCK_ASSERT(inp) do { \ 251 mtx_assert(&(inp)->inp_mtx, MA_OWNED); \ 252 NET_ASSERT_GIANT(); \ 253 } while (0) 254 #define INP_UNLOCK_ASSERT(inp) mtx_assert(&(inp)->inp_mtx, MA_NOTOWNED) 255 256 #define INP_INFO_LOCK_INIT(ipi, d) \ 257 mtx_init(&(ipi)->ipi_mtx, (d), NULL, MTX_DEF | MTX_RECURSE) 258 #define INP_INFO_LOCK_DESTROY(ipi) mtx_destroy(&(ipi)->ipi_mtx) 259 #define INP_INFO_RLOCK(ipi) mtx_lock(&(ipi)->ipi_mtx) 260 #define INP_INFO_WLOCK(ipi) mtx_lock(&(ipi)->ipi_mtx) 261 #define INP_INFO_RUNLOCK(ipi) mtx_unlock(&(ipi)->ipi_mtx) 262 #define INP_INFO_WUNLOCK(ipi) mtx_unlock(&(ipi)->ipi_mtx) 263 #define INP_INFO_RLOCK_ASSERT(ipi) do { \ 264 mtx_assert(&(ipi)->ipi_mtx, MA_OWNED); \ 265 NET_ASSERT_GIANT(); \ 266 } while (0) 267 #define INP_INFO_WLOCK_ASSERT(ipi) do { \ 268 mtx_assert(&(ipi)->ipi_mtx, MA_OWNED); \ 269 NET_ASSERT_GIANT(); \ 270 } while (0) 271 272 #define INP_PCBHASH(faddr, lport, fport, mask) \ 273 (((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport))) & (mask)) 274 #define INP_PCBPORTHASH(lport, mask) \ 275 (ntohs((lport)) & (mask)) 276 277 /* flags in inp_flags: */ 278 #define INP_RECVOPTS 0x01 /* receive incoming IP options */ 279 #define INP_RECVRETOPTS 0x02 /* receive IP options for reply */ 280 #define INP_RECVDSTADDR 0x04 /* receive IP dst address */ 281 #define INP_HDRINCL 0x08 /* user supplies entire IP header */ 282 #define INP_HIGHPORT 0x10 /* user wants "high" port binding */ 283 #define INP_LOWPORT 0x20 /* user wants "low" port binding */ 284 #define INP_ANONPORT 0x40 /* port chosen for user */ 285 #define INP_RECVIF 0x80 /* receive incoming interface */ 286 #define INP_MTUDISC 0x100 /* user can do MTU discovery */ 287 #define INP_FAITH 0x200 /* accept FAITH'ed connections */ 288 #define INP_RECVTTL 0x400 /* receive incoming IP TTL */ 289 #define INP_DONTFRAG 0x800 /* don't fragment packet */ 290 291 #define IN6P_IPV6_V6ONLY 0x008000 /* restrict AF_INET6 socket for v6 */ 292 293 #define IN6P_PKTINFO 0x010000 /* receive IP6 dst and I/F */ 294 #define IN6P_HOPLIMIT 0x020000 /* receive hoplimit */ 295 #define IN6P_HOPOPTS 0x040000 /* receive hop-by-hop options */ 296 #define IN6P_DSTOPTS 0x080000 /* receive dst options after rthdr */ 297 #define IN6P_RTHDR 0x100000 /* receive routing header */ 298 #define IN6P_RTHDRDSTOPTS 0x200000 /* receive dstoptions before rthdr */ 299 #define IN6P_TCLASS 0x400000 /* receive traffic class value */ 300 #define IN6P_AUTOFLOWLABEL 0x800000 /* attach flowlabel automatically */ 301 #define IN6P_RFC2292 0x40000000 /* used RFC2292 API on the socket */ 302 #define IN6P_MTU 0x80000000 /* receive path MTU */ 303 304 #define INP_CONTROLOPTS (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\ 305 INP_RECVIF|INP_RECVTTL|\ 306 IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_HOPOPTS|\ 307 IN6P_DSTOPTS|IN6P_RTHDR|IN6P_RTHDRDSTOPTS|\ 308 IN6P_TCLASS|IN6P_AUTOFLOWLABEL|IN6P_RFC2292|\ 309 IN6P_MTU) 310 #define INP_UNMAPPABLEOPTS (IN6P_HOPOPTS|IN6P_DSTOPTS|IN6P_RTHDR|\ 311 IN6P_TCLASS|IN6P_AUTOFLOWLABEL) 312 313 /* for KAME src sync over BSD*'s */ 314 #define IN6P_HIGHPORT INP_HIGHPORT 315 #define IN6P_LOWPORT INP_LOWPORT 316 #define IN6P_ANONPORT INP_ANONPORT 317 #define IN6P_RECVIF INP_RECVIF 318 #define IN6P_MTUDISC INP_MTUDISC 319 #define IN6P_FAITH INP_FAITH 320 #define IN6P_CONTROLOPTS INP_CONTROLOPTS 321 /* 322 * socket AF version is {newer than,or include} 323 * actual datagram AF version 324 */ 325 326 #define INPLOOKUP_WILDCARD 1 327 #define sotoinpcb(so) ((struct inpcb *)(so)->so_pcb) 328 #define sotoin6pcb(so) sotoinpcb(so) /* for KAME src sync over BSD*'s */ 329 330 #define INP_SOCKAF(so) so->so_proto->pr_domain->dom_family 331 332 #define INP_CHECK_SOCKAF(so, af) (INP_SOCKAF(so) == af) 333 334 #ifdef _KERNEL 335 extern int ipport_reservedhigh; 336 extern int ipport_reservedlow; 337 extern int ipport_lowfirstauto; 338 extern int ipport_lowlastauto; 339 extern int ipport_firstauto; 340 extern int ipport_lastauto; 341 extern int ipport_hifirstauto; 342 extern int ipport_hilastauto; 343 extern struct callout ipport_tick_callout; 344 345 void in_pcbpurgeif0(struct inpcbinfo *, struct ifnet *); 346 int in_pcballoc(struct socket *, struct inpcbinfo *); 347 int in_pcbbind(struct inpcb *, struct sockaddr *, struct ucred *); 348 int in_pcbbind_setup(struct inpcb *, struct sockaddr *, in_addr_t *, 349 u_short *, struct ucred *); 350 int in_pcbconnect(struct inpcb *, struct sockaddr *, struct ucred *); 351 int in_pcbconnect_setup(struct inpcb *, struct sockaddr *, in_addr_t *, 352 u_short *, in_addr_t *, u_short *, struct inpcb **, 353 struct ucred *); 354 void in_pcbdetach(struct inpcb *); 355 void in_pcbdisconnect(struct inpcb *); 356 void in_pcbdrop(struct inpcb *); 357 void in_pcbfree(struct inpcb *); 358 int in_pcbinshash(struct inpcb *); 359 struct inpcb * 360 in_pcblookup_local(struct inpcbinfo *, 361 struct in_addr, u_int, int); 362 struct inpcb * 363 in_pcblookup_hash(struct inpcbinfo *, struct in_addr, u_int, 364 struct in_addr, u_int, int, struct ifnet *); 365 void in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr, 366 int, struct inpcb *(*)(struct inpcb *, int)); 367 void in_pcbrehash(struct inpcb *); 368 void in_pcbsetsolabel(struct socket *so); 369 int in_setpeeraddr(struct socket *so, struct sockaddr **nam, struct inpcbinfo *pcbinfo); 370 int in_setsockaddr(struct socket *so, struct sockaddr **nam, struct inpcbinfo *pcbinfo); 371 struct sockaddr * 372 in_sockaddr(in_port_t port, struct in_addr *addr); 373 void in_pcbsosetlabel(struct socket *so); 374 void in_pcbremlists(struct inpcb *inp); 375 void ipport_tick(void *xtp); 376 #endif /* _KERNEL */ 377 378 #endif /* !_NETINET_IN_PCB_H_ */ 379