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Gratuitous UDP restyling toward style(9) in 7.x.

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This commit is contained in:
Robert Watson 2007-02-20 10:13:11 +00:00
parent 3bb153ea78
commit 3329b23659
3 changed files with 168 additions and 175 deletions
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7
sys/netinet/udp.h
View File

@ -1,6 +1,7 @@
/*-
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
* The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -31,10 +32,10 @@
*/
#ifndef _NETINET_UDP_H_
#define _NETINET_UDP_H_
#define _NETINET_UDP_H_
/*
* Udp protocol header.
* UDP protocol header.
* Per RFC 768, September, 1981.
*/
struct udphdr {

277
sys/netinet/udp_usrreq.c
View File

@ -1,6 +1,7 @@
/*-
* Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
* The Regents of the University of California. All rights reserved.
* The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -79,11 +80,11 @@
#ifdef FAST_IPSEC
#include <netipsec/ipsec.h>
#endif /*FAST_IPSEC*/
#endif
#ifdef IPSEC
#include <netinet6/ipsec.h>
#endif /*IPSEC*/
#endif
#include <machine/in_cksum.h>
@ -95,33 +96,28 @@
*/
/*
* BSD 4.2 defaulted the udp checksum to be off. Turning off udp
* checksums removes the only data integrity mechanism for packets and
* malformed packets that would otherwise be discarded by bad checksums
* may cause problems (especially for NFS data blocks).
* BSD 4.2 defaulted the udp checksum to be off. Turning off udp checksums
* removes the only data integrity mechanism for packets and malformed
* packets that would otherwise be discarded by bad checksums may cause
* problems (especially for NFS data blocks).
*/
#ifndef COMPAT_42
static int udpcksum = 1;
#else
static int udpcksum = 0;
#endif
SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW,
&udpcksum, 0, "");
SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW, &udpcksum,
0, "");
int log_in_vain = 0;
SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW,
&log_in_vain, 0, "Log all incoming UDP packets");
static int blackhole = 0;
SYSCTL_INT(_net_inet_udp, OID_AUTO, blackhole, CTLFLAG_RW,
&blackhole, 0, "Do not send port unreachables for refused connects");
SYSCTL_INT(_net_inet_udp, OID_AUTO, blackhole, CTLFLAG_RW, &blackhole, 0,
"Do not send port unreachables for refused connects");
static int strict_mcast_mship = 0;
SYSCTL_INT(_net_inet_udp, OID_AUTO, strict_mcast_mship, CTLFLAG_RW,
&strict_mcast_mship, 0, "Only send multicast to member sockets");
&strict_mcast_mship, 0, "Only send multicast to member sockets");
struct inpcbhead udb; /* from udp_var.h */
#define udb6 udb /* for KAME src sync over BSD*'s */
struct inpcbinfo udbinfo;
#ifndef UDBHASHSIZE
@ -129,15 +125,15 @@ struct inpcbinfo udbinfo;
#endif
struct udpstat udpstat; /* from udp_var.h */
SYSCTL_STRUCT(_net_inet_udp, UDPCTL_STATS, stats, CTLFLAG_RW,
&udpstat, udpstat, "UDP statistics (struct udpstat, netinet/udp_var.h)");
SYSCTL_STRUCT(_net_inet_udp, UDPCTL_STATS, stats, CTLFLAG_RW, &udpstat,
udpstat, "UDP statistics (struct udpstat, netinet/udp_var.h)");
static void udp_append(struct inpcb *last, struct ip *ip, struct mbuf *n,
int off, struct sockaddr_in *udp_in);
static void udp_append(struct inpcb *last, struct ip *ip, struct mbuf *n,
int off, struct sockaddr_in *udp_in);
static void udp_detach(struct socket *so);
static int udp_output(struct inpcb *, struct mbuf *, struct sockaddr *,
struct mbuf *, struct thread *);
static void udp_detach(struct socket *so);
static int udp_output(struct inpcb *, struct mbuf *, struct sockaddr *,
struct mbuf *, struct thread *);
static void
udp_zone_change(void *tag)
@ -163,7 +159,7 @@ udp_init()
udbinfo.listhead = &udb;
udbinfo.hashbase = hashinit(UDBHASHSIZE, M_PCB, &udbinfo.hashmask);
udbinfo.porthashbase = hashinit(UDBHASHSIZE, M_PCB,
&udbinfo.porthashmask);
&udbinfo.porthashmask);
udbinfo.ipi_zone = uma_zcreate("udpcb", sizeof(struct inpcb), NULL,
NULL, udp_inpcb_init, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
uma_zone_set_max(udbinfo.ipi_zone, maxsockets);
@ -172,14 +168,12 @@ udp_init()
}
void
udp_input(m, off)
register struct mbuf *m;
int off;
udp_input(struct mbuf *m, int off)
{
int iphlen = off;
register struct ip *ip;
register struct udphdr *uh;
register struct inpcb *inp;
struct ip *ip;
struct udphdr *uh;
struct inpcb *inp;
int len;
struct ip save_ip;
struct sockaddr_in udp_in;
@ -190,10 +184,9 @@ udp_input(m, off)
udpstat.udps_ipackets++;
/*
* Strip IP options, if any; should skip this,
* make available to user, and use on returned packets,
* but we don't yet have a way to check the checksum
* with options still present.
* Strip IP options, if any; should skip this, make available to
* user, and use on returned packets, but we don't yet have a way to
* check the checksum with options still present.
*/
if (iphlen > sizeof (struct ip)) {
ip_stripoptions(m, (struct mbuf *)0);
@ -213,13 +206,15 @@ udp_input(m, off)
}
uh = (struct udphdr *)((caddr_t)ip + iphlen);
/* destination port of 0 is illegal, based on RFC768. */
/*
* Destination port of 0 is illegal, based on RFC768.
*/
if (uh->uh_dport == 0)
goto badunlocked;
/*
* Construct sockaddr format source address.
* Stuff source address and datagram in user buffer.
* Construct sockaddr format source address. Stuff source address
* and datagram in user buffer.
*/
bzero(&udp_in, sizeof(udp_in));
udp_in.sin_len = sizeof(udp_in);
@ -240,9 +235,10 @@ udp_input(m, off)
m_adj(m, len - ip->ip_len);
/* ip->ip_len = len; */
}
/*
* Save a copy of the IP header in case we want restore it
* for sending an ICMP error message in response.
* Save a copy of the IP header in case we want restore it for
* sending an ICMP error message in response.
*/
if (!blackhole)
save_ip = *ip;
@ -276,17 +272,23 @@ udp_input(m, off)
udpstat.udps_nosum++;
#ifdef IPFIREWALL_FORWARD
/* Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain. */
/*
* Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
*/
fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL);
if (fwd_tag != NULL) {
struct sockaddr_in *next_hop;
/* Do the hack. */
/*
* Do the hack.
*/
next_hop = (struct sockaddr_in *)(fwd_tag + 1);
ip->ip_dst = next_hop->sin_addr;
uh->uh_dport = ntohs(next_hop->sin_port);
/* Remove the tag from the packet. We don't need it anymore. */
/*
* Remove the tag from the packet. We don't need it anymore.
*/
m_tag_delete(m, fwd_tag);
}
#endif
@ -296,25 +298,22 @@ udp_input(m, off)
if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
struct inpcb *last;
/*
* Deliver a multicast or broadcast datagram to *all* sockets
* for which the local and remote addresses and ports match
* those of the incoming datagram. This allows more than
* one process to receive multi/broadcasts on the same port.
* those of the incoming datagram. This allows more than one
* process to receive multi/broadcasts on the same port.
* (This really ought to be done for unicast datagrams as
* well, but that would cause problems with existing
* applications that open both address-specific sockets and
* a wildcard socket listening to the same port -- they would
* applications that open both address-specific sockets and a
* wildcard socket listening to the same port -- they would
* end up receiving duplicates of every unicast datagram.
* Those applications open the multiple sockets to overcome an
* inadequacy of the UDP socket interface, but for backwards
* compatibility we avoid the problem here rather than
* fixing the interface. Maybe 4.5BSD will remedy this?)
*/
/*
* Locate pcb(s) for datagram.
* (Algorithm copied from raw_intr().)
* Those applications open the multiple sockets to overcome
* an inadequacy of the UDP socket interface, but for
* backwards compatibility we avoid the problem here rather
* than fixing the interface. Maybe 4.5BSD will remedy
* this?)
*/
last = NULL;
LIST_FOREACH(inp, &udb, inp_list) {
@ -334,7 +333,6 @@ udp_input(m, off)
inp->inp_fport != uh->uh_sport)
continue;
}
INP_LOCK(inp);
/*
* Check multicast packets to make sure they are only
@ -343,10 +341,12 @@ udp_input(m, off)
*/
#define MSHIP(_inp, n) ((_inp)->inp_moptions->imo_membership[(n)])
#define NMSHIPS(_inp) ((_inp)->inp_moptions->imo_num_memberships)
INP_LOCK(inp);
if (strict_mcast_mship && inp->inp_moptions != NULL) {
int mship, foundmship = 0;
for (mship = 0; mship < NMSHIPS(inp); mship++) {
for (mship = 0; mship < NMSHIPS(inp);
mship++) {
if (MSHIP(inp, mship)->inm_addr.s_addr
== ip->ip_dst.s_addr &&
MSHIP(inp, mship)->inm_ifp
@ -367,30 +367,29 @@ udp_input(m, off)
n = m_copy(m, 0, M_COPYALL);
if (n != NULL)
udp_append(last, ip, n,
iphlen +
sizeof(struct udphdr),
&udp_in);
udp_append(last, ip, n, iphlen +
sizeof(struct udphdr), &udp_in);
INP_UNLOCK(last);
}
last = inp;
/*
* Don't look for additional matches if this one does
* not have either the SO_REUSEPORT or SO_REUSEADDR
* socket options set. This heuristic avoids searching
* through all pcbs in the common case of a non-shared
* port. It assumes that an application will never
* clear these options after setting them.
* socket options set. This heuristic avoids
* searching through all pcbs in the common case of a
* non-shared port. It assumes that an application
* will never clear these options after setting them.
*/
if ((last->inp_socket->so_options&(SO_REUSEPORT|SO_REUSEADDR)) == 0)
if ((last->inp_socket->so_options &
(SO_REUSEPORT|SO_REUSEADDR)) == 0)
break;
}
if (last == NULL) {
/*
* No matching pcb found; discard datagram.
* (No need to send an ICMP Port Unreachable
* for a broadcast or multicast datgram.)
* No matching pcb found; discard datagram. (No need
* to send an ICMP Port Unreachable for a broadcast
* or multicast datgram.)
*/
udpstat.udps_noportbcast++;
goto badheadlocked;
@ -401,6 +400,7 @@ udp_input(m, off)
INP_INFO_RUNLOCK(&udbinfo);
return;
}
/*
* Locate pcb for datagram.
*/
@ -431,8 +431,11 @@ udp_input(m, off)
INP_INFO_RUNLOCK(&udbinfo);
return;
}
/*
* Check the minimum TTL for socket.
*/
INP_LOCK(inp);
/* Check the minimum TTL for socket. */
if (inp->inp_ip_minttl && inp->inp_ip_minttl > ip->ip_ttl)
goto badheadlocked;
udp_append(inp, ip, m, iphlen + sizeof(struct udphdr), &udp_in);
@ -446,7 +449,6 @@ badheadlocked:
INP_INFO_RUNLOCK(&udbinfo);
badunlocked:
m_freem(m);
return;
}
/*
@ -457,12 +459,8 @@ badunlocked:
* into the socket code.
*/
static void
udp_append(inp, ip, n, off, udp_in)
struct inpcb *inp;
struct ip *ip;
struct mbuf *n;
int off;
struct sockaddr_in *udp_in;
udp_append(struct inpcb *inp, struct ip *ip, struct mbuf *n, int off,
struct sockaddr_in *udp_in)
{
struct sockaddr *append_sa;
struct socket *so;
@ -478,7 +476,7 @@ udp_append(inp, ip, n, off, udp_in)
if (ipsec4_in_reject(n, inp)) {
#ifdef IPSEC
ipsecstat.in_polvio++;
#endif /*IPSEC*/
#endif
m_freem(n);
return;
}
@ -501,7 +499,7 @@ udp_append(inp, ip, n, off, udp_in)
inp->inp_flags = savedflags;
} else
#endif
ip_savecontrol(inp, &opts, ip, n);
ip_savecontrol(inp, &opts, ip, n);
}
#ifdef INET6
if (inp->inp_vflag & INP_IPV6) {
@ -512,7 +510,7 @@ udp_append(inp, ip, n, off, udp_in)
append_sa = (struct sockaddr *)&udp_in6;
} else
#endif
append_sa = (struct sockaddr *)udp_in;
append_sa = (struct sockaddr *)udp_in;
m_adj(n, off);
so = inp->inp_socket;
@ -528,25 +526,21 @@ udp_append(inp, ip, n, off, udp_in)
}
/*
* Notify a udp user of an asynchronous error;
* just wake up so that he can collect error status.
* Notify a udp user of an asynchronous error; just wake up so that they can
* collect error status.
*/
struct inpcb *
udp_notify(inp, errno)
register struct inpcb *inp;
int errno;
udp_notify(struct inpcb *inp, int errno)
{
inp->inp_socket->so_error = errno;
sorwakeup(inp->inp_socket);
sowwakeup(inp->inp_socket);
return inp;
return (inp);
}
void
udp_ctlinput(cmd, sa, vip)
int cmd;
struct sockaddr *sa;
void *vip;
udp_ctlinput(int cmd, struct sockaddr *sa, void *vip)
{
struct ip *ip = vip;
struct udphdr *uh;
@ -563,10 +557,12 @@ udp_ctlinput(cmd, sa, vip)
*/
if (PRC_IS_REDIRECT(cmd))
return;
/*
* Hostdead is ugly because it goes linearly through all PCBs.
* XXX: We never get this from ICMP, otherwise it makes an
* excellent DoS attack on machines with many connections.
*
* XXX: We never get this from ICMP, otherwise it makes an excellent
* DoS attack on machines with many connections.
*/
if (cmd == PRC_HOSTDEAD)
ip = 0;
@ -605,11 +601,11 @@ udp_pcblist(SYSCTL_HANDLER_ARGS)
n = udbinfo.ipi_count;
req->oldidx = 2 * (sizeof xig)
+ (n + n/8) * sizeof(struct xinpcb);
return 0;
return (0);
}
if (req->newptr != 0)
return EPERM;
return (EPERM);
/*
* OK, now we're committed to doing something.
@ -630,11 +626,11 @@ udp_pcblist(SYSCTL_HANDLER_ARGS)
xig.xig_sogen = so_gencnt;
error = SYSCTL_OUT(req, &xig, sizeof xig);
if (error)
return error;
return (error);
inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK);
if (inp_list == 0)
return ENOMEM;
return (ENOMEM);
INP_INFO_RLOCK(&udbinfo);
for (inp = LIST_FIRST(udbinfo.listhead), i = 0; inp && i < n;
@ -664,15 +660,14 @@ udp_pcblist(SYSCTL_HANDLER_ARGS)
INP_UNLOCK(inp);
error = SYSCTL_OUT(req, &xi, sizeof xi);
} else
INP_UNLOCK(inp);
INP_UNLOCK(inp);
}
if (!error) {
/*
* Give the user an updated idea of our state.
* If the generation differs from what we told
* her before, she knows that something happened
* while we were processing this request, and it
* might be necessary to retry.
* Give the user an updated idea of our state. If the
* generation differs from what we told her before, she knows
* that something happened while we were processing this
* request, and it might be necessary to retry.
*/
INP_INFO_RLOCK(&udbinfo);
xig.xig_gen = udbinfo.ipi_gencnt;
@ -682,11 +677,11 @@ udp_pcblist(SYSCTL_HANDLER_ARGS)
error = SYSCTL_OUT(req, &xig, sizeof xig);
}
free(inp_list, M_TEMP);
return error;
return (error);
}
SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist, CTLFLAG_RD, 0, 0,
udp_pcblist, "S,xinpcb", "List of active UDP sockets");
udp_pcblist, "S,xinpcb", "List of active UDP sockets");
static int
udp_getcred(SYSCTL_HANDLER_ARGS)
@ -726,15 +721,11 @@ SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred,
udp_getcred, "S,xucred", "Get the xucred of a UDP connection");
static int
udp_output(inp, m, addr, control, td)
register struct inpcb *inp;
struct mbuf *m;
struct sockaddr *addr;
struct mbuf *control;
struct thread *td;
udp_output(struct inpcb *inp, struct mbuf *m, struct sockaddr *addr,
struct mbuf *control, struct thread *td)
{
register struct udpiphdr *ui;
register int len = m->m_pkthdr.len;
struct udpiphdr *ui;
int len = m->m_pkthdr.len;
struct in_addr faddr, laddr;
struct cmsghdr *cm;
struct sockaddr_in *sin, src;
@ -753,19 +744,19 @@ udp_output(inp, m, addr, control, td)
if (control)
m_freem(control);
m_freem(m);
return EMSGSIZE;
return (EMSGSIZE);
}
src.sin_addr.s_addr = INADDR_ANY;
if (control != NULL) {
/*
* XXX: Currently, we assume all the optional information
* is stored in a single mbuf.
* XXX: Currently, we assume all the optional information is
* stored in a single mbuf.
*/
if (control->m_next) {
m_freem(control);
m_freem(m);
return EINVAL;
return (EINVAL);
}
for (; control->m_len > 0;
control->m_data += CMSG_ALIGN(cm->cmsg_len),
@ -803,11 +794,10 @@ udp_output(inp, m, addr, control, td)
}
if (error) {
m_freem(m);
return error;
return (error);
}
if (src.sin_addr.s_addr != INADDR_ANY ||
addr != NULL) {
if (src.sin_addr.s_addr != INADDR_ANY || addr != NULL) {
INP_INFO_WLOCK(&udbinfo);
unlock_udbinfo = 1;
} else
@ -834,7 +824,8 @@ udp_output(inp, m, addr, control, td)
if (addr) {
sin = (struct sockaddr_in *)addr;
if (jailed(td->td_ucred))
prison_remote_ip(td->td_ucred, 0, &sin->sin_addr.s_addr);
prison_remote_ip(td->td_ucred, 0,
&sin->sin_addr.s_addr);
if (inp->inp_faddr.s_addr != INADDR_ANY) {
error = EISCONN;
goto release;
@ -884,8 +875,8 @@ udp_output(inp, m, addr, control, td)
m->m_pkthdr.len -= max_linkhdr;
/*
* Fill in mbuf with extended UDP header
* and addresses and length put into network format.
* Fill in mbuf with extended UDP header and addresses and length put
* into network format.
*/
ui = mtod(m, struct udpiphdr *);
bzero(ui->ui_x1, sizeof(ui->ui_x1)); /* XXX still needed? */
@ -901,6 +892,7 @@ udp_output(inp, m, addr, control, td)
*/
if (inp->inp_flags & INP_DONTFRAG) {
struct ip *ip;
ip = (struct ip *)&ui->ui_i;
ip->ip_off |= IP_DF;
}
@ -923,9 +915,8 @@ udp_output(inp, m, addr, control, td)
htons((u_short)len + sizeof(struct udphdr) + IPPROTO_UDP));
m->m_pkthdr.csum_flags = CSUM_UDP;
m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
} else {
} else
ui->ui_sum = 0;
}
((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
((struct ip *)ui)->ip_tos = inp->inp_ip_tos; /* XXX */
@ -989,12 +980,12 @@ udp_attach(struct socket *so, int proto, struct thread *td)
KASSERT(inp == NULL, ("udp_attach: inp != NULL"));
error = soreserve(so, udp_sendspace, udp_recvspace);
if (error)
return error;
return (error);
INP_INFO_WLOCK(&udbinfo);
error = in_pcballoc(so, &udbinfo);
if (error) {
INP_INFO_WUNLOCK(&udbinfo);
return error;
return (error);
}
inp = (struct inpcb *)so->so_pcb;
@ -1002,7 +993,7 @@ udp_attach(struct socket *so, int proto, struct thread *td)
inp->inp_vflag |= INP_IPV4;
inp->inp_ip_ttl = ip_defttl;
INP_UNLOCK(inp);
return 0;
return (0);
}
static int
@ -1018,7 +1009,7 @@ udp_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
error = in_pcbbind(inp, nam, td->td_ucred);
INP_UNLOCK(inp);
INP_INFO_WUNLOCK(&udbinfo);
return error;
return (error);
}
static void
@ -1053,7 +1044,7 @@ udp_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
if (inp->inp_faddr.s_addr != INADDR_ANY) {
INP_UNLOCK(inp);
INP_INFO_WUNLOCK(&udbinfo);
return EISCONN;
return (EISCONN);
}
sin = (struct sockaddr_in *)nam;
if (jailed(td->td_ucred))
@ -1063,7 +1054,7 @@ udp_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
soisconnected(so);
INP_UNLOCK(inp);
INP_INFO_WUNLOCK(&udbinfo);
return error;
return (error);
}
static void
@ -1094,7 +1085,7 @@ udp_disconnect(struct socket *so)
if (inp->inp_faddr.s_addr == INADDR_ANY) {
INP_INFO_WUNLOCK(&udbinfo);
INP_UNLOCK(inp);
return ENOTCONN;
return (ENOTCONN);
}
in_pcbdisconnect(inp);
@ -1104,18 +1095,18 @@ udp_disconnect(struct socket *so)
SOCK_UNLOCK(so);
INP_UNLOCK(inp);
INP_INFO_WUNLOCK(&udbinfo);
return 0;
return (0);
}
static int
udp_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
struct mbuf *control, struct thread *td)
struct mbuf *control, struct thread *td)
{
struct inpcb *inp;
inp = sotoinpcb(so);
KASSERT(inp != NULL, ("udp_send: inp == NULL"));
return udp_output(inp, m, addr, control, td);
return (udp_output(inp, m, addr, control, td));
}
int
@ -1128,27 +1119,29 @@ udp_shutdown(struct socket *so)
INP_LOCK(inp);
socantsendmore(so);
INP_UNLOCK(inp);
return 0;
return (0);
}
/*
* This is the wrapper function for in_setsockaddr. We just pass down
* the pcbinfo for in_setsockaddr to lock. We don't want to do the locking
* here because in_setsockaddr will call malloc and might block.
* This is the wrapper function for in_setsockaddr. We just pass down the
* pcbinfo for in_setsockaddr() to lock. We don't want to do the locking
* here because in_setsockaddr() will call malloc and might block.
*/
static int
udp_sockaddr(struct socket *so, struct sockaddr **nam)
{
return (in_setsockaddr(so, nam, &udbinfo));
}
/*
* This is the wrapper function for in_setpeeraddr. We just pass down
* the pcbinfo for in_setpeeraddr to lock.
* This is the wrapper function for in_setpeeraddr(). We just pass down the
* pcbinfo for in_setpeeraddr() to lock.
*/
static int
udp_peeraddr(struct socket *so, struct sockaddr **nam)
{
return (in_setpeeraddr(so, nam, &udbinfo));
}

59
sys/netinet/udp_var.h
View File

@ -1,6 +1,7 @@
/*-
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California. All rights reserved.
* The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -31,14 +32,14 @@
*/
#ifndef _NETINET_UDP_VAR_H_
#define _NETINET_UDP_VAR_H_
#define _NETINET_UDP_VAR_H_
/*
* UDP kernel structures and variables.
*/
struct udpiphdr {
struct ipovly ui_i; /* overlaid ip structure */
struct udphdr ui_u; /* udp header */
struct udpiphdr {
struct ipovly ui_i; /* overlaid ip structure */
struct udphdr ui_u; /* udp header */
};
#define ui_x1 ui_i.ih_x1
#define ui_pr ui_i.ih_pr
@ -50,7 +51,7 @@ struct udpiphdr {
#define ui_ulen ui_u.uh_ulen
#define ui_sum ui_u.uh_sum
struct udpstat {
struct udpstat {
/* input statistics: */
u_long udps_ipackets; /* total input packets */
u_long udps_hdrops; /* packet shorter than header */
@ -70,42 +71,40 @@ struct udpstat {
};
/*
* Names for UDP sysctl objects
* Names for UDP sysctl objects.
*/
#define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
#define UDPCTL_STATS 2 /* statistics (read-only) */
#define UDPCTL_STATS 2 /* statistics (read-only) */
#define UDPCTL_MAXDGRAM 3 /* max datagram size */
#define UDPCTL_RECVSPACE 4 /* default receive buffer space */
#define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */
#define UDPCTL_MAXID 6
#define UDPCTL_MAXID 6
#define UDPCTL_NAMES { \
{ 0, 0 }, \
{ "checksum", CTLTYPE_INT }, \
{ "stats", CTLTYPE_STRUCT }, \
{ "maxdgram", CTLTYPE_INT }, \
{ "recvspace", CTLTYPE_INT }, \
{ "pcblist", CTLTYPE_STRUCT }, \
#define UDPCTL_NAMES { \
{ 0, 0 }, \
{ "checksum", CTLTYPE_INT }, \
{ "stats", CTLTYPE_STRUCT }, \
{ "maxdgram", CTLTYPE_INT }, \
{ "recvspace", CTLTYPE_INT }, \
{ "pcblist", CTLTYPE_STRUCT }, \
}
#ifdef _KERNEL
SYSCTL_DECL(_net_inet_udp);
extern struct pr_usrreqs udp_usrreqs;
extern struct inpcbhead udb;
extern struct inpcbinfo udbinfo;
extern u_long udp_sendspace;
extern u_long udp_recvspace;
extern struct udpstat udpstat;
extern int log_in_vain;
extern struct pr_usrreqs udp_usrreqs;
extern struct inpcbhead udb;
extern struct inpcbinfo udbinfo;
extern u_long udp_sendspace;
extern u_long udp_recvspace;
extern struct udpstat udpstat;
extern int log_in_vain;
void udp_ctlinput(int, struct sockaddr *, void *);
void udp_init(void);
void udp_input(struct mbuf *, int);
struct inpcb *
udp_notify(struct inpcb *inp, int errno);
int udp_shutdown(struct socket *so);
void udp_ctlinput(int, struct sockaddr *, void *);
void udp_init(void);
void udp_input(struct mbuf *, int);
struct inpcb *udp_notify(struct inpcb *inp, int errno);
int udp_shutdown(struct socket *so);
#endif
#endif