4c9b6756a5
tells a socket that it should both add a protocol header to tx'd
datagrams and remove the header from rx'd datagrams:
int onoff = 1, s = socket(...);
setsockopt(s, SOL_SOCKET, SO_NOHEADER, &onoff);
2) Add an implementation of (SOL_SOCKET, SO_NOHEADER) for raw IPv4
sockets.
3) Reorganize the protocols' pr_ctloutput implementations a bit.
Consistently return ENOPROTOOPT when an option is unsupported,
and EINVAL if a supported option's arguments are incorrect.
Reorganize the flow of code so that it's more clear how/when
options are passed down the stack until they are handled.
Shorten some pr_ctloutput staircases for readability.
4) Extract common mbuf code into subroutines, add new sockaddr
methods, and introduce a new subroutine, fsocreate(), for reuse
later; use it first in sys_socket():
struct mbuf *m_getsombuf(struct socket *so)
Create an mbuf and make its owner the socket `so'.
struct mbuf *m_intopt(struct socket *so, int val)
Create an mbuf, make its owner the socket `so', put the
int `val' into it, and set its length to sizeof(int).
int fsocreate(..., int *fd)
Create a socket, a la socreate(9), put the socket into the
given LWP's descriptor table, return the descriptor at `fd'
on success.
void *sockaddr_addr(struct sockaddr *sa, socklen_t *slenp)
const void *sockaddr_const_addr(const struct sockaddr *sa, socklen_t *slenp)
Extract a pointer to the address part of a sockaddr. Write
the length of the address part at `slenp', if `slenp' is
not NULL.
socklen_t sockaddr_getlen(const struct sockaddr *sa)
Return the length of a sockaddr. This just evaluates to
sa->sa_len. I only add this for consistency with code that
appears in a portable userland library that I am going to
import.
const struct sockaddr *sockaddr_any(const struct sockaddr *sa)
Return the "don't care" sockaddr in the same family as
`sa'. This is the address a client should sobind(9) if it
does not care the source address and, if applicable, the
port et cetera that it uses.
const void *sockaddr_anyaddr(const struct sockaddr *sa, socklen_t *slenp)
Return the "don't care" sockaddr in the same family as
`sa'. This is the address a client should sobind(9) if it
does not care the source address and, if applicable, the
port et cetera that it uses.
158 lines
6.8 KiB
C
158 lines
6.8 KiB
C
/* $NetBSD: in_pcb.h,v 1.43 2007/09/19 04:33:43 dyoung Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982, 1986, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)in_pcb.h 8.1 (Berkeley) 6/10/93
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*/
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#ifndef _NETINET_IN_PCB_H_
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#define _NETINET_IN_PCB_H_
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#include <sys/queue.h>
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#include <netinet/in_pcb_hdr.h>
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/*
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* Common structure pcb for internet protocol implementation.
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* Here are stored pointers to local and foreign host table
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* entries, local and foreign socket numbers, and pointers
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* up (to a socket structure) and down (to a protocol-specific)
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* control block.
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*/
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struct inpcb {
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struct inpcb_hdr inp_head;
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#define inp_hash inp_head.inph_hash
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#define inp_queue inp_head.inph_queue
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#define inp_af inp_head.inph_af
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#define inp_ppcb inp_head.inph_ppcb
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#define inp_state inp_head.inph_state
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#define inp_socket inp_head.inph_socket
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#define inp_table inp_head.inph_table
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#define inp_sp inp_head.inph_sp
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struct route inp_route; /* placeholder for routing entry */
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u_int16_t inp_fport; /* foreign port */
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u_int16_t inp_lport; /* local port */
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int inp_flags; /* generic IP/datagram flags */
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struct ip inp_ip; /* header prototype; should have more */
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struct mbuf *inp_options; /* IP options */
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struct ip_moptions *inp_moptions; /* IP multicast options */
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int inp_errormtu; /* MTU of last xmit status = EMSGSIZE */
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};
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#define inp_faddr inp_ip.ip_dst
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#define inp_laddr inp_ip.ip_src
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/* flags in inp_flags: */
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#define INP_RECVOPTS 0x01 /* receive incoming IP options */
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#define INP_RECVRETOPTS 0x02 /* receive IP options for reply */
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#define INP_RECVDSTADDR 0x04 /* receive IP dst address */
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#define INP_HDRINCL 0x08 /* user supplies entire IP header */
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#define INP_HIGHPORT 0x10 /* (unused; FreeBSD compat) */
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#define INP_LOWPORT 0x20 /* user wants "low" port binding */
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#define INP_ANONPORT 0x40 /* port chosen for user */
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#define INP_RECVIF 0x80 /* receive incoming interface */
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/* XXX should move to an UDP control block */
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#define INP_ESPINUDP 0x100 /* ESP over UDP for NAT-T */
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#define INP_ESPINUDP_NON_IKE 0x200 /* ESP over UDP for NAT-T */
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#define INP_CONTROLOPTS (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
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INP_RECVIF)
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#define INP_ESPINUDP_ALL (INP_ESPINUDP|INP_ESPINUDP_NON_IKE)
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#define INP_NOHEADER 0x400 /* Kernel removes IP header
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* before feeding a packet
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* to the raw socket user.
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* The socket user will
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* not supply an IP header.
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* Cancels INP_HDRINCL.
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*/
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#define sotoinpcb(so) ((struct inpcb *)(so)->so_pcb)
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#ifdef _KERNEL
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void in_losing(struct inpcb *);
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int in_pcballoc(struct socket *, void *);
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int in_pcbbind(void *, struct mbuf *, struct lwp *);
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int in_pcbconnect(void *, struct mbuf *, struct lwp *);
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void in_pcbdetach(void *);
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void in_pcbdisconnect(void *);
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void in_pcbinit(struct inpcbtable *, int, int);
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struct inpcb *
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in_pcblookup_port(struct inpcbtable *,
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struct in_addr, u_int, int);
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struct inpcb *
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in_pcblookup_bind(struct inpcbtable *,
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struct in_addr, u_int);
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struct inpcb *
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in_pcblookup_connect(struct inpcbtable *,
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struct in_addr, u_int, struct in_addr, u_int);
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int in_pcbnotify(struct inpcbtable *, struct in_addr, u_int,
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struct in_addr, u_int, int, void (*)(struct inpcb *, int));
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void in_pcbnotifyall(struct inpcbtable *, struct in_addr, int,
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void (*)(struct inpcb *, int));
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void in_pcbpurgeif0(struct inpcbtable *, struct ifnet *);
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void in_pcbpurgeif(struct inpcbtable *, struct ifnet *);
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void in_pcbstate(struct inpcb *, int);
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void in_rtchange(struct inpcb *, int);
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void in_setpeeraddr(struct inpcb *, struct mbuf *);
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void in_setsockaddr(struct inpcb *, struct mbuf *);
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struct rtentry *
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in_pcbrtentry(struct inpcb *);
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extern struct sockaddr_in *in_selectsrc(struct sockaddr_in *,
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struct route *, int, struct ip_moptions *, int *);
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#endif
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#endif /* !_NETINET_IN_PCB_H_ */
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