FreeBSD/Linux Kernel Cross Reference
sys/netinet/in_pcb.h
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 * Struct inpcb is the ommon structure pcb for the Internet Protocol
48 * implementation.
49 *
50 * Pointers to local and foreign host table entries, local and foreign socket
51 * numbers, and pointers up (to a socket structure) and down (to a
52 * protocol-specific control block) are stored here.
53 */
54 LIST_HEAD(inpcbhead, inpcb);
55 LIST_HEAD(inpcbporthead, inpcbport);
56 typedef u_quad_t inp_gen_t;
57
58 /*
59 * PCB with AF_INET6 null bind'ed laddr can receive AF_INET input packet.
60 * So, AF_INET6 null laddr is also used as AF_INET null laddr, by utilizing
61 * the following structure.
62 */
63 struct in_addr_4in6 {
64 u_int32_t ia46_pad32[3];
65 struct in_addr ia46_addr4;
66 };
67
68 /*
69 * NOTE: ipv6 addrs should be 64-bit aligned, per RFC 2553. in_conninfo has
70 * some extra padding to accomplish this.
71 */
72 struct in_endpoints {
73 u_int16_t ie_fport; /* foreign port */
74 u_int16_t ie_lport; /* local port */
75 /* protocol dependent part, local and foreign addr */
76 union {
77 /* foreign host table entry */
78 struct in_addr_4in6 ie46_foreign;
79 struct in6_addr ie6_foreign;
80 } ie_dependfaddr;
81 union {
82 /* local host table entry */
83 struct in_addr_4in6 ie46_local;
84 struct in6_addr ie6_local;
85 } ie_dependladdr;
86 #define ie_faddr ie_dependfaddr.ie46_foreign.ia46_addr4
87 #define ie_laddr ie_dependladdr.ie46_local.ia46_addr4
88 #define ie6_faddr ie_dependfaddr.ie6_foreign
89 #define ie6_laddr ie_dependladdr.ie6_local
90 };
91
92 /*
93 * XXX The defines for inc_* are hacks and should be changed to direct
94 * references.
95 */
96 struct in_conninfo {
97 u_int8_t inc_flags;
98 u_int8_t inc_len;
99 u_int16_t inc_pad; /* XXX alignment for in_endpoints */
100 /* protocol dependent part */
101 struct in_endpoints inc_ie;
102 };
103 #define inc_isipv6 inc_flags /* temp compatability */
104 #define inc_fport inc_ie.ie_fport
105 #define inc_lport inc_ie.ie_lport
106 #define inc_faddr inc_ie.ie_faddr
107 #define inc_laddr inc_ie.ie_laddr
108 #define inc6_faddr inc_ie.ie6_faddr
109 #define inc6_laddr inc_ie.ie6_laddr
110
111 struct icmp6_filter;
112
113 struct inpcb {
114 LIST_ENTRY(inpcb) inp_hash; /* hash list */
115 LIST_ENTRY(inpcb) inp_list; /* list for all PCBs of this proto */
116 void *inp_ppcb; /* pointer to per-protocol pcb */
117 struct inpcbinfo *inp_pcbinfo; /* PCB list info */
118 struct socket *inp_socket; /* back pointer to socket */
119
120 u_int32_t inp_flow;
121 int inp_flags; /* generic IP/datagram flags */
122
123 u_char inp_vflag; /* IP version flag (v4/v6) */
124 #define INP_IPV4 0x1
125 #define INP_IPV6 0x2
126 #define INP_IPV6PROTO 0x4 /* opened under IPv6 protocol */
127 #define INP_TIMEWAIT 0x8 /* .. probably doesn't go here */
128 #define INP_ONESBCAST 0x10 /* send all-ones broadcast */
129 #define INP_DROPPED 0x20 /* protocol drop flag */
130 #define INP_SOCKREF 0x40 /* strong socket reference */
131 u_char inp_ip_ttl; /* time to live proto */
132 u_char inp_ip_p; /* protocol proto */
133 u_char inp_ip_minttl; /* minimum TTL or drop */
134 uint32_t inp_ispare1; /* connection id / queue id */
135 void *inp_pspare[2]; /* rtentry / general use */
136
137 /* Local and foreign ports, local and foreign addr. */
138 struct in_conninfo inp_inc;
139
140 /* list for this PCB's local port */
141 struct label *inp_label; /* MAC label */
142 struct inpcbpolicy *inp_sp; /* for IPSEC */
143
144 /* Protocol-dependent part; options. */
145 struct {
146 u_char inp4_ip_tos; /* type of service proto */
147 struct mbuf *inp4_options; /* IP options */
148 struct ip_moptions *inp4_moptions; /* IP multicast options */
149 } inp_depend4;
150 #define inp_fport inp_inc.inc_fport
151 #define inp_lport inp_inc.inc_lport
152 #define inp_faddr inp_inc.inc_faddr
153 #define inp_laddr inp_inc.inc_laddr
154 #define inp_ip_tos inp_depend4.inp4_ip_tos
155 #define inp_options inp_depend4.inp4_options
156 #define inp_moptions inp_depend4.inp4_moptions
157 struct {
158 /* IP options */
159 struct mbuf *inp6_options;
160 /* IP6 options for outgoing packets */
161 struct ip6_pktopts *inp6_outputopts;
162 /* IP multicast options */
163 struct ip6_moptions *inp6_moptions;
164 /* ICMPv6 code type filter */
165 struct icmp6_filter *inp6_icmp6filt;
166 /* IPV6_CHECKSUM setsockopt */
167 int inp6_cksum;
168 short inp6_hops;
169 } inp_depend6;
170 LIST_ENTRY(inpcb) inp_portlist;
171 struct inpcbport *inp_phd; /* head of this list */
172 #define inp_zero_size offsetof(struct inpcb, inp_gencnt)
173 inp_gen_t inp_gencnt; /* generation count of this instance */
174 struct mtx inp_mtx;
175
176 #define in6p_faddr inp_inc.inc6_faddr
177 #define in6p_laddr inp_inc.inc6_laddr
178 #define in6p_hops inp_depend6.inp6_hops /* default hop limit */
179 #define in6p_ip6_nxt inp_ip_p
180 #define in6p_flowinfo inp_flow
181 #define in6p_vflag inp_vflag
182 #define in6p_options inp_depend6.inp6_options
183 #define in6p_outputopts inp_depend6.inp6_outputopts
184 #define in6p_moptions inp_depend6.inp6_moptions
185 #define in6p_icmp6filt inp_depend6.inp6_icmp6filt
186 #define in6p_cksum inp_depend6.inp6_cksum
187 #define in6p_flags inp_flags /* for KAME src sync over BSD*'s */
188 #define in6p_socket inp_socket /* for KAME src sync over BSD*'s */
189 #define in6p_lport inp_lport /* for KAME src sync over BSD*'s */
190 #define in6p_fport inp_fport /* for KAME src sync over BSD*'s */
191 #define in6p_ppcb inp_ppcb /* for KAME src sync over BSD*'s */
192 };
193 /*
194 * The range of the generation count, as used in this implementation, is 9e19.
195 * We would have to create 300 billion connections per second for this number
196 * to roll over in a year. This seems sufficiently unlikely that we simply
197 * don't concern ourselves with that possibility.
198 */
199
200 /*
201 * Interface exported to userland by various protocols which use inpcbs. Hack
202 * alert -- only define if struct xsocket is in scope.
203 */
204 #ifdef _SYS_SOCKETVAR_H_
205 struct xinpcb {
206 size_t xi_len; /* length of this structure */
207 struct inpcb xi_inp;
208 struct xsocket xi_socket;
209 u_quad_t xi_alignment_hack;
210 };
211
212 struct xinpgen {
213 size_t xig_len; /* length of this structure */
214 u_int xig_count; /* number of PCBs at this time */
215 inp_gen_t xig_gen; /* generation count at this time */
216 so_gen_t xig_sogen; /* socket generation count at this time */
217 };
218 #endif /* _SYS_SOCKETVAR_H_ */
219
220 struct inpcbport {
221 LIST_ENTRY(inpcbport) phd_hash;
222 struct inpcbhead phd_pcblist;
223 u_short phd_port;
224 };
225
226 /*
227 * Global data structure for each high-level protocol (UDP, TCP, ...) in both
228 * IPv4 and IPv6. Holds inpcb lists and information for managing them.
229 */
230 struct inpcbinfo {
231 /*
232 * Global list of inpcbs on the protocol.
233 */
234 struct inpcbhead *ipi_listhead;
235 u_int ipi_count;
236
237 /*
238 * Global hash of inpcbs, hashed by local and foreign addresses and
239 * port numbers.
240 */
241 struct inpcbhead *ipi_hashbase;
242 u_long ipi_hashmask;
243
244 /*
245 * Global hash of inpcbs, hashed by only local port number.
246 */
247 struct inpcbporthead *ipi_porthashbase;
248 u_long ipi_porthashmask;
249
250 /*
251 * Fields associated with port lookup and allocation.
252 */
253 u_short ipi_lastport;
254 u_short ipi_lastlow;
255 u_short ipi_lasthi;
256
257 /*
258 * UMA zone from which inpcbs are allocated for this protocol.
259 */
260 struct uma_zone *ipi_zone;
261
262 /*
263 * Generation count--incremented each time a connection is allocated
264 * or freed.
265 */
266 u_quad_t ipi_gencnt;
267 struct mtx ipi_mtx;
268
269 /*
270 * vimage 1
271 * general use 1
272 */
273 void *ipi_pspare[2];
274 };
275
276 #define INP_LOCK_INIT(inp, d, t) \
277 mtx_init(&(inp)->inp_mtx, (d), (t), MTX_DEF | MTX_RECURSE | MTX_DUPOK)
278 #define INP_LOCK_DESTROY(inp) mtx_destroy(&(inp)->inp_mtx)
279 #define INP_LOCK(inp) mtx_lock(&(inp)->inp_mtx)
280 #define INP_UNLOCK(inp) mtx_unlock(&(inp)->inp_mtx)
281 #define INP_LOCK_ASSERT(inp) mtx_assert(&(inp)->inp_mtx, MA_OWNED)
282 #define INP_UNLOCK_ASSERT(inp) mtx_assert(&(inp)->inp_mtx, MA_NOTOWNED)
283
284 #define INP_INFO_LOCK_INIT(ipi, d) \
285 mtx_init(&(ipi)->ipi_mtx, (d), NULL, MTX_DEF | MTX_RECURSE)
286 #define INP_INFO_LOCK_DESTROY(ipi) mtx_destroy(&(ipi)->ipi_mtx)
287 #define INP_INFO_RLOCK(ipi) mtx_lock(&(ipi)->ipi_mtx)
288 #define INP_INFO_WLOCK(ipi) mtx_lock(&(ipi)->ipi_mtx)
289 #define INP_INFO_RUNLOCK(ipi) mtx_unlock(&(ipi)->ipi_mtx)
290 #define INP_INFO_WUNLOCK(ipi) mtx_unlock(&(ipi)->ipi_mtx)
291 #define INP_INFO_RLOCK_ASSERT(ipi) mtx_assert(&(ipi)->ipi_mtx, MA_OWNED)
292 #define INP_INFO_WLOCK_ASSERT(ipi) mtx_assert(&(ipi)->ipi_mtx, MA_OWNED)
293 #define INP_INFO_UNLOCK_ASSERT(ipi) mtx_assert(&(ipi)->ipi_mtx, MA_NOTOWNED)
294
295 #define INP_PCBHASH(faddr, lport, fport, mask) \
296 (((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport))) & (mask))
297 #define INP_PCBPORTHASH(lport, mask) \
298 (ntohs((lport)) & (mask))
299
300 /* flags in inp_flags: */
301 #define INP_RECVOPTS 0x01 /* receive incoming IP options */
302 #define INP_RECVRETOPTS 0x02 /* receive IP options for reply */
303 #define INP_RECVDSTADDR 0x04 /* receive IP dst address */
304 #define INP_HDRINCL 0x08 /* user supplies entire IP header */
305 #define INP_HIGHPORT 0x10 /* user wants "high" port binding */
306 #define INP_LOWPORT 0x20 /* user wants "low" port binding */
307 #define INP_ANONPORT 0x40 /* port chosen for user */
308 #define INP_RECVIF 0x80 /* receive incoming interface */
309 #define INP_MTUDISC 0x100 /* user can do MTU discovery */
310 #define INP_FAITH 0x200 /* accept FAITH'ed connections */
311 #define INP_RECVTTL 0x400 /* receive incoming IP TTL */
312 #define INP_DONTFRAG 0x800 /* don't fragment packet */
313
314 #define IN6P_IPV6_V6ONLY 0x008000 /* restrict AF_INET6 socket for v6 */
315
316 #define IN6P_PKTINFO 0x010000 /* receive IP6 dst and I/F */
317 #define IN6P_HOPLIMIT 0x020000 /* receive hoplimit */
318 #define IN6P_HOPOPTS 0x040000 /* receive hop-by-hop options */
319 #define IN6P_DSTOPTS 0x080000 /* receive dst options after rthdr */
320 #define IN6P_RTHDR 0x100000 /* receive routing header */
321 #define IN6P_RTHDRDSTOPTS 0x200000 /* receive dstoptions before rthdr */
322 #define IN6P_TCLASS 0x400000 /* receive traffic class value */
323 #define IN6P_AUTOFLOWLABEL 0x800000 /* attach flowlabel automatically */
324 #define IN6P_RFC2292 0x40000000 /* used RFC2292 API on the socket */
325 #define IN6P_MTU 0x80000000 /* receive path MTU */
326
327 #define INP_CONTROLOPTS (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
328 INP_RECVIF|INP_RECVTTL|\
329 IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_HOPOPTS|\
330 IN6P_DSTOPTS|IN6P_RTHDR|IN6P_RTHDRDSTOPTS|\
331 IN6P_TCLASS|IN6P_AUTOFLOWLABEL|IN6P_RFC2292|\
332 IN6P_MTU)
333 #define INP_UNMAPPABLEOPTS (IN6P_HOPOPTS|IN6P_DSTOPTS|IN6P_RTHDR|\
334 IN6P_TCLASS|IN6P_AUTOFLOWLABEL)
335
336 /* for KAME src sync over BSD*'s */
337 #define IN6P_HIGHPORT INP_HIGHPORT
338 #define IN6P_LOWPORT INP_LOWPORT
339 #define IN6P_ANONPORT INP_ANONPORT
340 #define IN6P_RECVIF INP_RECVIF
341 #define IN6P_MTUDISC INP_MTUDISC
342 #define IN6P_FAITH INP_FAITH
343 #define IN6P_CONTROLOPTS INP_CONTROLOPTS
344 /*
345 * socket AF version is {newer than,or include}
346 * actual datagram AF version
347 */
348
349 #define INPLOOKUP_WILDCARD 1
350 #define sotoinpcb(so) ((struct inpcb *)(so)->so_pcb)
351 #define sotoin6pcb(so) sotoinpcb(so) /* for KAME src sync over BSD*'s */
352
353 #define INP_SOCKAF(so) so->so_proto->pr_domain->dom_family
354
355 #define INP_CHECK_SOCKAF(so, af) (INP_SOCKAF(so) == af)
356
357 #ifdef _KERNEL
358 extern int ipport_reservedhigh;
359 extern int ipport_reservedlow;
360 extern int ipport_lowfirstauto;
361 extern int ipport_lowlastauto;
362 extern int ipport_firstauto;
363 extern int ipport_lastauto;
364 extern int ipport_hifirstauto;
365 extern int ipport_hilastauto;
366 extern struct callout ipport_tick_callout;
367
368 void in_pcbpurgeif0(struct inpcbinfo *, struct ifnet *);
369 int in_pcballoc(struct socket *, struct inpcbinfo *);
370 int in_pcbbind(struct inpcb *, struct sockaddr *, struct ucred *);
371 int in_pcbbind_setup(struct inpcb *, struct sockaddr *, in_addr_t *,
372 u_short *, struct ucred *);
373 int in_pcbconnect(struct inpcb *, struct sockaddr *, struct ucred *);
374 int in_pcbconnect_setup(struct inpcb *, struct sockaddr *, in_addr_t *,
375 u_short *, in_addr_t *, u_short *, struct inpcb **,
376 struct ucred *);
377 void in_pcbdetach(struct inpcb *);
378 void in_pcbdisconnect(struct inpcb *);
379 void in_pcbdrop(struct inpcb *);
380 void in_pcbfree(struct inpcb *);
381 int in_pcbinshash(struct inpcb *);
382 struct inpcb *
383 in_pcblookup_local(struct inpcbinfo *,
384 struct in_addr, u_int, int);
385 struct inpcb *
386 in_pcblookup_hash(struct inpcbinfo *, struct in_addr, u_int,
387 struct in_addr, u_int, int, struct ifnet *);
388 void in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr,
389 int, struct inpcb *(*)(struct inpcb *, int));
390 void in_pcbrehash(struct inpcb *);
391 void in_pcbsetsolabel(struct socket *so);
392 int in_getpeeraddr(struct socket *so, struct sockaddr **nam);
393 int in_getsockaddr(struct socket *so, struct sockaddr **nam);
394 struct sockaddr *
395 in_sockaddr(in_port_t port, struct in_addr *addr);
396 void in_pcbsosetlabel(struct socket *so);
397 void in_pcbremlists(struct inpcb *inp);
398 void ipport_tick(void *xtp);
399
400 /*
401 * Debugging routines compiled in when DDB is present.
402 */
403 void db_print_inpcb(struct inpcb *inp, const char *name, int indent);
404
405 #endif /* _KERNEL */
406
407 #endif /* !_NETINET_IN_PCB_H_ */
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