udp_usrreq.c
上传用户:nvosite88
上传日期:2007-01-17
资源大小:4983k
文件大小:33k
- /* udp_usrreq.c - UDP protocol routines */
- /* Copyright 1984 - 2001 Wind River Systems, Inc. */
- #include "copyright_wrs.h"
- /*
- * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
- * 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
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
- */
- /*
- modification history
- --------------------
- 03g,12oct01,rae merge from truestack ver 03k, base 03f (SPR #65887 etc.)
- 03f,31aug98,n_s added udp_hlen validty check to udp_input (). spr #6263.
- 03e,05oct97,vin added fast multicasting.
- 03d,31mar97,vin modified for hash look ups for pcbs(FREEBSD 2.2.1).
- 03c,20jan97,vin replace icmp_error with _icmpErrorHook for scalability,
- added new udpDoCkSumRcv variable, fixed bugs mentioned
- in Stevens VOLII chapter 23, pg772 & pg774.
- 03b,22nov96,vin added cluster support replaced m_get(..) with mBufClGet(..).
- 03a,03mar96,vin created from BSD4.4 stuff,integrated with 02r of udp_usrreq.c.
- */
- /*
- DESCRIPTION
- */
- #include "vxWorks.h"
- #include "net/mbuf.h"
- #include "net/protosw.h"
- #include "sys/socket.h"
- #include "net/socketvar.h"
- #include "errno.h"
- #include "net/if.h"
- #include "net/route.h"
- #include "netinet/in.h"
- #include "netinet/in_pcb.h"
- #include "netinet/in_systm.h"
- #include "netinet/ip.h"
- #include "netinet/ip_var.h"
- #include "netinet/in_var.h"
- #include "netinet/ip_icmp.h"
- #include "netinet/udp.h"
- #include "netinet/udp_var.h"
- #include "net/systm.h"
- #include "stdio.h"
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET
- #include "wvNetLib.h"
- #endif
- #endif
- #ifdef VIRTUAL_STACK
- #include "netinet/vsLib.h"
- #endif
- /*
- * UDP protocol implementation.
- * Per RFC 768, August, 1980.
- */
- #ifndef UDBHASHSIZE
- #define UDBHASHSIZE 64
- #endif
- #ifndef VIRTUAL_STACK
- #ifndef COMPAT_42
- int udpcksum = 1; /* turn on send checksum by default */
- int udpDoCkSumRcv = 1; /* turn on recv checksum by default */
- #else
- int udpcksum = 0; /* XXX */
- int udpDoCkSumRcv = 0;
- #endif
- /* externs */
- extern VOIDFUNCPTR _icmpErrorHook;
- /* globals */
- struct inpcbhead udb; /* from udp_var.h */
- struct inpcbinfo udbinfo;
- struct udpstat udpstat; /* global udp statistics structure */
- struct sockaddr_in udp_in = { sizeof(udp_in), AF_INET };
- struct inpcb * udp_last_inpcb = NULL; /* last PCB cache for fast look up */
- int udp_ttl = UDP_TTL;
- u_long udp_sendspace = 9216; /* really max datagram size */
- u_long udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
- /* 40 1K datagrams */
- u_short udp_pcbhashsize = UDBHASHSIZE; /* size of hash table */
- #endif /* VIRTUAL_STACK */
- /* locals */
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET
- /* Set common fields of event identifiers for this module. */
- LOCAL UCHAR wvNetModuleId = WV_NET_UDPREQ_MODULE; /* Value for udp_usrreq.c */
- LOCAL UCHAR wvNetLocalFilter = WV_NET_NONE; /* Available event filter */
- LOCAL ULONG wvNetEventId; /* Event identifier: see wvNetLib.h */
- #endif /* INCLUDE_WVNET */
- #endif
- /* forward declarations */
- static void udp_detach (struct inpcb *);
- static void udp_notify (struct inpcb *, int);
- static struct mbuf *udp_saveopt (caddr_t, int, int);
- void
- udp_init()
- {
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_VERBOSE event */
- WV_NET_MARKER_0 (NET_AUX_EVENT, WV_NET_VERBOSE, 43, 16,
- WV_NETEVENT_UDPINIT_START)
- #endif /* INCLUDE_WVNET */
- #endif
- LIST_INIT(&udb);
- udbinfo.listhead = &udb;
- #ifdef VIRTUAL_STACK
- udp_in.sin_len = sizeof(udp_in);
- udp_in.sin_family = AF_INET;
- udp_last_inpcb = NULL;
- udp_ttl = UDP_TTL;
- udp_sendspace = 9216;
- udp_recvspace = 40 * (1024 + sizeof (struct sockaddr_in));
- udp_pcbhashsize = UDBHASHSIZE;
- #ifndef COMPAT_42
- udpcksum = 1; /* turn on send checksum by default */
- udpDoCkSumRcv = 1; /* turn on recv checksum by default */
- #else
- udpcksum = 0; /* XXX */
- udpDoCkSumRcv = 0;
- #endif /* COMPAT_42 */
- #endif /* VIRTUAL_STACK */
- udbinfo.hashbase = hashinit(udp_pcbhashsize, MT_PCB, &udbinfo.hashmask);
- }
- void
- udp_input(m, iphlen)
- register struct mbuf *m;
- int iphlen;
- {
- register struct ip *ip;
- register struct udphdr *uh;
- register struct inpcb *inp;
- struct mbuf *opts = 0;
- int len;
- struct ip save_ip;
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_NOTICE event */
- WV_NET_EVENT_0 (NET_CORE_EVENT, WV_NET_NOTICE, 21, 10,
- WV_NETEVENT_UDPIN_START, WV_NET_RECV)
- #endif /* INCLUDE_WVNET */
- #endif
- 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.
- */
- if (iphlen > sizeof (struct ip)) {
- ip_stripoptions(m, (struct mbuf *)0);
- iphlen = sizeof(struct ip);
- }
- /*
- * Get IP and UDP header together in first mbuf.
- */
- ip = mtod(m, struct ip *);
- if (m->m_len < iphlen + sizeof(struct udphdr)) {
- if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
- udpstat.udps_hdrops++;
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_WARNING event */
- WV_NET_EVENT_0 (NET_CORE_EVENT, WV_NET_WARNING, 14, 4,
- WV_NETEVENT_UDPIN_SHORTPKTHDR, WV_NET_RECV)
- #endif /* INCLUDE_WVNET */
- #endif
- return;
- }
- ip = mtod(m, struct ip *);
- }
- uh = (struct udphdr *)((caddr_t)ip + iphlen);
- /*
- * Make mbuf data length reflect UDP length.
- * If not enough data to reflect UDP length, drop.
- */
- len = ntohs((u_short)uh->uh_ulen);
- if (len < sizeof (struct udphdr))
- {
- udpstat.udps_badlen++;
- goto bad;
- }
- if (ip->ip_len != len) {
- if (len > ip->ip_len) {
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_WARNING event */
- WV_NET_EVENT_0 (NET_CORE_EVENT, WV_NET_WARNING, 15, 5,
- WV_NETEVENT_UDPIN_BADLEN, WV_NET_RECV)
- #endif /* INCLUDE_WVNET */
- #endif
- udpstat.udps_badlen++;
- goto bad;
- }
- 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_ip = *ip;
- /*
- * Checksum extended UDP header and data.
- */
- if (udpDoCkSumRcv && uh->uh_sum) {
- ((struct ipovly *)ip)->ih_next = 0;
- ((struct ipovly *)ip)->ih_prev = 0;
- ((struct ipovly *)ip)->ih_x1 = 0;
- ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
- if ((uh->uh_sum = in_cksum(m, len + sizeof (struct ip)))) {
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_WARNING event */
- WV_NET_EVENT_0 (NET_CORE_EVENT, WV_NET_WARNING, 16, 6,
- WV_NETEVENT_UDPIN_BADSUM, WV_NET_RECV)
- #endif /* INCLUDE_WVNET */
- #endif
- udpstat.udps_badsum++;
- m_freem(m);
- return;
- }
- }
- if(IN_MULTICAST(ntohl(ip->ip_dst.s_addr)))
- {
- IN_MULTI * pInMulti;
- M_BLK_ID pInPcbMblk;
- IN_LOOKUP_MULTI(ip->ip_dst, m->m_pkthdr.rcvif, pInMulti);
- /* give the packet to all pcbs registered */
- if (pInMulti != NULL)
- {
- struct socket *last;
- /*
- * Construct sockaddr format source address.
- */
- udp_in.sin_port = uh->uh_sport;
- udp_in.sin_addr = ip->ip_src;
- m->m_len -= sizeof (struct udpiphdr);
- m->m_data += sizeof (struct udpiphdr);
- /*
- * give the datagrams to all the pcbs
- *
- */
- last = NULL;
- for (pInPcbMblk = pInMulti->pInPcbMblk; pInPcbMblk != NULL;
- pInPcbMblk = pInPcbMblk->mBlkHdr.mNext)
- {
- inp = mtod (pInPcbMblk, struct inpcb *);
- if (inp->inp_lport != uh->uh_dport)
- continue;
- if (inp->inp_laddr.s_addr != INADDR_ANY)
- if (inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
- continue;
- if (inp->inp_faddr.s_addr != INADDR_ANY)
- if (inp->inp_faddr.s_addr != ip->ip_src.s_addr ||
- inp->inp_fport != uh->uh_sport)
- continue;
- if (last != NULL)
- {
- struct mbuf *n;
- if ((n = m_copy(m, 0, M_COPYALL)) != NULL)
- {
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_INFO event */
- WV_NET_PORTIN_EVENT_4 (NET_CORE_EVENT, WV_NET_INFO, 56, 18,
- uh->uh_sport, uh->uh_dport,
- WV_NETEVENT_UDPIN_PCBGOOD, WV_NET_RECV,
- ip->ip_src.s_addr, uh->uh_sport,
- last->so_fd, uh->uh_dport)
- #endif /* INCLUDE_WVNET */
- #endif
- if (sbappendaddr(&last->so_rcv,
- (struct sockaddr *)&udp_in,
- n, (struct mbuf *)0) == 0)
- {
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_WARNING event */
- WV_NET_PORTIN_EVENT_1 (NET_CORE_EVENT, WV_NET_WARNING, 17, 7,
- uh->uh_sport, uh->uh_dport,
- WV_NETEVENT_UDPIN_FULLSOCK, WV_NET_RECV,
- last->so_fd)
- #endif /* INCLUDE_WVNET */
- #endif
- m_freem(n);
- udpstat.udps_fullsock++;
- }
- else
- sorwakeup(last);
- }
- }
- last = inp->inp_socket;
- /*
- * 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.
- */
- if ((last->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.)
- */
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_WARNING event */
- WV_NET_PORTIN_EVENT_4 (NET_CORE_EVENT, WV_NET_WARNING, 18, 8,
- uh->uh_sport, uh->uh_dport,
- WV_NETEVENT_UDPIN_SEARCHFAIL, WV_NET_RECV,
- ip->ip_src.s_addr, uh->uh_sport,
- ip->ip_dst.s_addr, uh->uh_dport)
- #endif /* INCLUDE_WVNET */
- #endif
- udpstat.udps_noportbcast++;
- goto bad;
- }
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_INFO event */
- WV_NET_PORTIN_EVENT_4 (NET_CORE_EVENT, WV_NET_INFO, 56, 18,
- uh->uh_sport, uh->uh_dport,
- WV_NETEVENT_UDPIN_PCBGOOD, WV_NET_RECV,
- ip->ip_src.s_addr, uh->uh_sport,
- last->so_fd, uh->uh_dport)
- #endif /* INCLUDE_WVNET */
- #endif
- if (sbappendaddr(&last->so_rcv, (struct sockaddr *)&udp_in,
- m, (struct mbuf *)0) == 0)
- {
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_WARNING event */
- WV_NET_PORTIN_EVENT_1 (NET_CORE_EVENT, WV_NET_WARNING, 17, 7,
- uh->uh_sport, uh->uh_dport,
- WV_NETEVENT_UDPIN_FULLSOCK, WV_NET_RECV,
- last->so_fd)
- #endif /* INCLUDE_WVNET */
- #endif
- udpstat.udps_fullsock++;
- goto bad;
- }
- sorwakeup(last);
- return;
- }
- }
-
- if (in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
- struct socket *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.
- * (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
- * 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?)
- */
- /*
- * Construct sockaddr format source address.
- */
- udp_in.sin_port = uh->uh_sport;
- udp_in.sin_addr = ip->ip_src;
- m->m_len -= sizeof (struct udpiphdr);
- m->m_data += sizeof (struct udpiphdr);
- /*
- * Locate pcb(s) for datagram.
- * (Algorithm copied from raw_intr().)
- */
- last = NULL;
- for (inp = udb.lh_first; inp != NULL;
- inp = inp->inp_list.le_next) {
- if (inp->inp_lport != uh->uh_dport)
- continue;
- if (inp->inp_laddr.s_addr != INADDR_ANY) {
- if (inp->inp_laddr.s_addr !=
- ip->ip_dst.s_addr)
- continue;
- }
- if (inp->inp_faddr.s_addr != INADDR_ANY) {
- if (inp->inp_faddr.s_addr !=
- ip->ip_src.s_addr ||
- inp->inp_fport != uh->uh_sport)
- continue;
- }
- if (last != NULL) {
- struct mbuf *n;
- if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_INFO event */
- WV_NET_PORTIN_EVENT_4 (NET_CORE_EVENT, WV_NET_INFO, 56, 18,
- uh->uh_sport, uh->uh_dport,
- WV_NETEVENT_UDPIN_PCBGOOD, WV_NET_RECV,
- ip->ip_src.s_addr, uh->uh_sport,
- last->so_fd, uh->uh_dport)
- #endif /* INCLUDE_WVNET */
- #endif
- if (sbappendaddr(&last->so_rcv,
- (struct sockaddr *)&udp_in,
- n, (struct mbuf *)0) == 0) {
- m_freem(n);
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_WARNING event */
- WV_NET_PORTIN_EVENT_1 (NET_CORE_EVENT, WV_NET_WARNING, 17, 7,
- uh->uh_sport, uh->uh_dport,
- WV_NETEVENT_UDPIN_FULLSOCK, WV_NET_RECV,
- last->so_fd)
- #endif /* INCLUDE_WVNET */
- #endif
- udpstat.udps_fullsock++;
- } else
- sorwakeup(last);
- }
- }
- last = inp->inp_socket;
- /*
- * 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.
- */
- if ((last->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.)
- */
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_WARNING event */
- WV_NET_PORTIN_EVENT_4 (NET_CORE_EVENT, WV_NET_WARNING, 18, 8,
- uh->uh_sport, uh->uh_dport,
- WV_NETEVENT_UDPIN_SEARCHFAIL, WV_NET_RECV,
- ip->ip_src.s_addr, uh->uh_sport,
- ip->ip_dst.s_addr, uh->uh_dport)
- #endif /* INCLUDE_WVNET */
- #endif
- udpstat.udps_noportbcast++;
- goto bad;
- }
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_INFO event */
- WV_NET_PORTIN_EVENT_4 (NET_CORE_EVENT, WV_NET_INFO, 56, 18,
- uh->uh_sport, uh->uh_dport,
- WV_NETEVENT_UDPIN_PCBGOOD, WV_NET_RECV,
- ip->ip_src.s_addr, uh->uh_sport,
- last->so_fd, uh->uh_dport)
- #endif /* INCLUDE_WVNET */
- #endif
- if (sbappendaddr(&last->so_rcv, (struct sockaddr *)&udp_in,
- m, (struct mbuf *)0) == 0) {
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_WARNING event */
- WV_NET_PORTIN_EVENT_1 (NET_CORE_EVENT, WV_NET_WARNING, 17, 7,
- uh->uh_sport, uh->uh_dport,
- WV_NETEVENT_UDPIN_FULLSOCK, WV_NET_RECV,
- last->so_fd)
- #endif /* INCLUDE_WVNET */
- #endif
- udpstat.udps_fullsock++;
- goto bad;
- }
- sorwakeup(last);
- return;
- }
- /*
- * Locate pcb for datagram. use the cached pcb if it matches.
- */
- inp = udp_last_inpcb;
- if ((inp != NULL) &&
- (inp->inp_lport == uh->uh_dport) &&
- (inp->inp_fport == uh->uh_sport) &&
- (inp->inp_faddr.s_addr == ip->ip_src.s_addr) &&
- (inp->inp_laddr.s_addr == ip->ip_dst.s_addr))
- {
- goto pcbMatchFound;
- }
- else
- {
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_VERBOSE event */
- WV_NET_PORTIN_EVENT_4 (NET_CORE_EVENT, WV_NET_VERBOSE, 44, 17,
- uh->uh_sport, uh->uh_dport,
- WV_NETEVENT_UDPIN_CACHEMISS, WV_NET_RECV,
- ip->ip_src.s_addr, uh->uh_sport,
- ip->ip_dst.s_addr, uh->uh_dport)
- #endif /* INCLUDE_WVNET */
- #endif
- udpstat.udpps_pcbcachemiss++;
- /*
- * Locate pcb for datagram.
- */
- inp = in_pcblookuphash(&udbinfo, ip->ip_src, uh->uh_sport,
- ip->ip_dst, uh->uh_dport, 1);
- if (inp == NULL)
- { /* look up for the wildcard match, hash look up failed */
- udpstat.udpps_pcbhashmiss++;
- udpstat.udps_noport++;
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_WARNING event */
- WV_NET_PORTIN_EVENT_4 (NET_CORE_EVENT, WV_NET_WARNING, 18, 8,
- uh->uh_sport, uh->uh_dport,
- WV_NETEVENT_UDPIN_SEARCHFAIL, WV_NET_RECV,
- ip->ip_src.s_addr, uh->uh_sport,
- ip->ip_dst.s_addr, uh->uh_dport)
- #endif /* INCLUDE_WVNET */
- #endif
- if (m->m_flags & (M_BCAST | M_MCAST))
- {
- udpstat.udps_noportbcast++;
- goto bad;
- }
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_WARNING event */
- WV_NET_PORTIN_EVENT_4 (NET_CORE_EVENT, WV_NET_WARNING, 19, 9,
- uh->uh_sport, uh->uh_dport,
- WV_NETEVENT_UDPIN_NOPORT, WV_NET_RECV,
- ip->ip_src.s_addr, uh->uh_sport,
- ip->ip_dst.s_addr, uh->uh_dport)
- #endif /* INCLUDE_WVNET */
- #endif
- *ip = save_ip;
- /* bug fix mentioned in Stevens VolII page774,(vinai) */
- /* ip->ip_len += iphlen; */
- if (_icmpErrorHook != NULL)
- (*_icmpErrorHook) (m, ICMP_UNREACH, ICMP_UNREACH_PORT,
- 0, 0);
- return;
- }
- }
- udp_last_inpcb = inp;
-
- pcbMatchFound:
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_INFO event */
- WV_NET_PORTIN_EVENT_4 (NET_CORE_EVENT, WV_NET_INFO, 56, 18,
- uh->uh_sport, uh->uh_dport,
- WV_NETEVENT_UDPIN_PCBGOOD, WV_NET_RECV,
- ip->ip_src.s_addr, uh->uh_sport,
- inp->inp_socket->so_fd, uh->uh_dport)
- #endif /* INCLUDE_WVNET */
- #endif
- /*
- * Construct sockaddr format source address.
- * Stuff source address and datagram in user buffer.
- */
- udp_in.sin_port = uh->uh_sport;
- udp_in.sin_addr = ip->ip_src;
- if (inp->inp_flags & INP_CONTROLOPTS) {
- struct mbuf **mp = &opts;
- if (inp->inp_flags & INP_RECVDSTADDR) {
- *mp = udp_saveopt((caddr_t) &ip->ip_dst,
- sizeof(struct in_addr), IP_RECVDSTADDR);
- if (*mp)
- mp = &(*mp)->m_next;
- }
- #ifdef notyet
- /* options were tossed above */
- if (inp->inp_flags & INP_RECVOPTS) {
- *mp = udp_saveopt((caddr_t) opts_deleted_above,
- sizeof(struct in_addr), IP_RECVOPTS);
- if (*mp)
- mp = &(*mp)->m_next;
- }
- /* ip_srcroute doesn't do what we want here, need to fix */
- if (inp->inp_flags & INP_RECVRETOPTS) {
- *mp = udp_saveopt((caddr_t) ip_srcroute(),
- sizeof(struct in_addr), IP_RECVRETOPTS);
- if (*mp)
- mp = &(*mp)->m_next;
- }
- #endif
- }
- iphlen += sizeof(struct udphdr);
- m->m_len -= iphlen;
- m->m_pkthdr.len -= iphlen;
- m->m_data += iphlen;
- if (sbappendaddr(&inp->inp_socket->so_rcv, (struct sockaddr *)&udp_in,
- m, opts) == 0) {
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_WARNING event */
- WV_NET_PORTIN_EVENT_1 (NET_CORE_EVENT, WV_NET_WARNING, 17, 7,
- uh->uh_sport, uh->uh_dport,
- WV_NETEVENT_UDPIN_FULLSOCK, WV_NET_RECV,
- inp->inp_socket->so_fd)
- #endif /* INCLUDE_WVNET */
- #endif
- udpstat.udps_fullsock++;
- goto bad;
- }
- sorwakeup(inp->inp_socket);
- return;
- bad:
- m_freem(m);
- if (opts)
- m_freem(opts);
- }
- /*
- * Create a "control" mbuf containing the specified data
- * with the specified type for presentation with a datagram.
- */
- struct mbuf *
- udp_saveopt(p, size, type)
- caddr_t p;
- register int size;
- int type;
- {
- register struct cmsghdr *cp;
- struct mbuf *m;
- if ((m = mBufClGet(M_DONTWAIT, MT_CONTROL, CL_SIZE_128, TRUE)) == NULL)
- return ((struct mbuf *) NULL);
- cp = (struct cmsghdr *) mtod(m, struct cmsghdr *);
- bcopy(p, CMSG_DATA(cp), size);
- size += sizeof(*cp);
- m->m_len = size;
- cp->cmsg_len = size;
- cp->cmsg_level = IPPROTO_IP;
- cp->cmsg_type = type;
- return (m);
- }
- /*
- * Notify a udp user of an asynchronous error;
- * just wake up so that he can collect error status.
- */
- static void
- udp_notify(inp, error)
- register struct inpcb *inp;
- int error;
- {
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_INFO event */
- WV_NET_MARKER_2 (NET_AUX_EVENT, WV_NET_INFO, 48, 12,
- WV_NETEVENT_UDPNOTIFY_START,
- inp->inp_socket->so_fd, error)
- #endif /* INCLUDE_WVNET */
- #endif
- inp->inp_socket->so_error = error;
- sorwakeup(inp->inp_socket);
- sowwakeup(inp->inp_socket);
- }
- void
- udp_ctlinput(cmd, sa, ip)
- int cmd;
- struct sockaddr *sa;
- register struct ip *ip;
- {
- register struct udphdr *uh;
- extern struct in_addr zeroin_addr;
- extern u_char inetctlerrmap[];
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_INFO event */
- WV_NET_MARKER_1 (NET_AUX_EVENT, WV_NET_INFO, 49, 13,
- WV_NETEVENT_UDPCTLIN_START, cmd)
- #endif /* INCLUDE_WVNET */
- #endif
- if (!PRC_IS_REDIRECT(cmd) &&
- ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0))
- return;
- if (ip) {
- uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
- in_pcbnotify(&udb, sa, uh->uh_dport, ip->ip_src, uh->uh_sport,
- cmd, udp_notify);
- } else
- in_pcbnotify(&udb, sa, 0, zeroin_addr, 0, cmd, udp_notify);
- }
- int
- udp_output(inp, m, addr, control)
- register struct inpcb *inp;
- register struct mbuf *m;
- struct mbuf *addr, *control;
- {
- struct rtentry *rt;
- register struct udpiphdr *ui;
- register int len = m->m_pkthdr.len;
- struct in_addr laddr;
- int s = 0, error = 0;
- if (control)
- m_freem(control); /* XXX */
- if (addr) {
- laddr = inp->inp_laddr;
- if (inp->inp_faddr.s_addr != INADDR_ANY) {
- error = EISCONN;
- goto release;
- }
- /*
- * Must block input while temporarily connected.
- */
- s = splnet();
- error = in_pcbconnect(inp, addr);
- if (error) {
- splx(s);
- goto release;
- }
- } else {
- if (inp->inp_faddr.s_addr == INADDR_ANY) {
- error = ENOTCONN;
- goto release;
- }
- }
- /*
- * Calculate data length and get a mbuf
- * for UDP and IP headers.
- */
- M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
- if (m == 0) {
- error = ENOBUFS;
- if (addr)
- {
- in_pcbdisconnect(inp);
- splx (s);
- }
- goto release;
- }
- /*
- * Fill in mbuf with extended UDP header
- * and addresses and length put into network format.
- */
- ui = mtod(m, struct udpiphdr *);
- ui->ui_next = ui->ui_prev = 0;
- ui->ui_x1 = 0;
- ui->ui_pr = IPPROTO_UDP;
- ui->ui_len = htons((u_short)len + sizeof (struct udphdr));
- ui->ui_src = inp->inp_laddr;
- ui->ui_dst = inp->inp_faddr;
- ui->ui_sport = inp->inp_lport;
- ui->ui_dport = inp->inp_fport;
- ui->ui_ulen = ui->ui_len;
- /*
- * Stuff checksum and output datagram.
- */
- ui->ui_sum = 0;
- if (udpcksum) {
- if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0)
- ui->ui_sum = 0xffff;
- }
- ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
- ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */
- ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */
- udpstat.udps_opackets++;
- /*
- * Prevent fragmentation to continue (or trigger) path MTU discovery
- * if the required routing entry and path MTU estimate are available
- * and path MTU discovery is enabled for this socket. Since UDP
- * produces a single datagram for each send operation, the application
- * which enables path MTU discovery must send datagrams equal to
- * the current MTU estimate or the process will not complete.
- */
- rt = inp->inp_route.ro_rt;
- if (rt && (rt->rt_flags & RTF_UP) && !(rt->rt_rmx.rmx_locks & RTV_MTU))
- {
- if (inp->inp_socket->so_options & SO_USEPATHMTU)
- ( (struct ip *)ui)->ip_off |= IP_DF;
- }
- error = ip_output(m, inp->inp_options, &inp->inp_route,
- inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
- inp->inp_moptions);
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_NOTICE event */
- WV_NET_PORTOUT_EVENT_4 (NET_CORE_EVENT, WV_NET_NOTICE, 22, 11,
- inp->inp_lport, inp->inp_fport,
- WV_NETEVENT_UDPOUT_FINISH, WV_NET_SEND,
- inp->inp_socket->so_fd, error,
- inp->inp_lport, inp->inp_fport)
- #endif /* INCLUDE_WVNET */
- #endif
- if (addr) {
- in_pcbdisconnect(inp);
- inp->inp_laddr = laddr;
- splx(s);
- }
- return (error);
- release:
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_ERROR event */
- WV_NET_EVENT_2 (NET_CORE_EVENT, WV_NET_ERROR, 41, 2,
- WV_NETEVENT_UDPOUT_FAIL, WV_NET_SEND,
- inp->inp_socket->so_fd, error)
- #endif /* INCLUDE_WVNET */
- #endif
- m_freem(m);
- return (error);
- }
- /*ARGSUSED*/
- int
- udp_usrreq(so, req, m, addr, control)
- struct socket *so;
- int req;
- struct mbuf *m, *addr, *control;
- {
- struct inpcb *inp = sotoinpcb(so);
- int error = 0;
- int s;
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_INFO event */
- WV_NET_MARKER_2 (NET_AUX_EVENT, WV_NET_INFO, 50, 14,
- WV_NETEVENT_UDPREQ_START, so->so_fd, req)
- #endif /* INCLUDE_WVNET */
- #endif
- if (req == PRU_CONTROL)
- return (in_control(so, (u_long)m, (caddr_t)addr,
- (struct ifnet *)control));
- if (inp == NULL && req != PRU_ATTACH) {
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_ERROR event */
- WV_NET_MARKER_2 (NET_AUX_EVENT, WV_NET_ERROR, 42, 3,
- WV_NETEVENT_UDPREQ_NOPCB, so->so_fd, req)
- #endif /* INCLUDE_WVNET */
- #endif
- error = EINVAL;
- goto release;
- }
- /*
- * Note: need to block udp_input while changing
- * the udp pcb queue and/or pcb addresses.
- */
- switch (req) {
- case PRU_ATTACH:
- if (inp != NULL) {
- error = EINVAL;
- break;
- }
- s = splnet();
- error = in_pcballoc(so, &udbinfo);
- splx(s);
- if (error)
- break;
- error = soreserve(so, udp_sendspace, udp_recvspace);
- if (error)
- break;
- ((struct inpcb *) so->so_pcb)->inp_ip.ip_ttl = ip_defttl;
- break;
- case PRU_DETACH:
- udp_detach(inp);
- break;
- case PRU_BIND:
- s = splnet();
- error = in_pcbbind(inp, addr);
- splx(s);
- break;
- case PRU_LISTEN:
- error = EOPNOTSUPP;
- break;
- case PRU_CONNECT:
- if (inp->inp_faddr.s_addr != INADDR_ANY) {
- error = EISCONN;
- break;
- }
- s = splnet();
- error = in_pcbconnect(inp, addr);
- splx(s);
- if (error == 0)
- soisconnected(so);
- break;
- case PRU_CONNECT2:
- error = EOPNOTSUPP;
- break;
- case PRU_ACCEPT:
- error = EOPNOTSUPP;
- break;
- case PRU_DISCONNECT:
- if (inp->inp_faddr.s_addr == INADDR_ANY) {
- error = ENOTCONN;
- break;
- }
- s = splnet();
- in_pcbdisconnect(inp);
- inp->inp_laddr.s_addr = INADDR_ANY;
- splx(s);
- so->so_state &= ~SS_ISCONNECTED; /* XXX */
- break;
- case PRU_SHUTDOWN:
- socantsendmore(so);
- break;
- case PRU_SEND:
- return (udp_output(inp, m, addr, control));
- case PRU_ABORT:
- soisdisconnected(so);
- udp_detach(inp);
- break;
- case PRU_SOCKADDR:
- in_setsockaddr(inp, addr);
- break;
- case PRU_PEERADDR:
- in_setpeeraddr(inp, addr);
- break;
- case PRU_SENSE:
- /*
- * stat: don't bother with a blocksize.
- */
- return (0);
- case PRU_SENDOOB:
- case PRU_FASTTIMO:
- case PRU_SLOWTIMO:
- case PRU_PROTORCV:
- case PRU_PROTOSEND:
- error = EOPNOTSUPP;
- break;
- case PRU_RCVD:
- case PRU_RCVOOB:
- return (EOPNOTSUPP); /* do not free mbuf's */
- default:
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /* WV_NET_EMERGENCY event */
- WV_NET_MARKER_2 (NET_AUX_EVENT, WV_NET_EMERGENCY, 32, 1,
- WV_NETEVENT_UDPREQ_PANIC, so->so_fd, req)
- #endif /* INCLUDE_WVNET */
- #endif
- panic("udp_usrreq");
- }
- release:
- if (control) {
- printf("udp control data unexpectedly retainedn");
- m_freem(control);
- }
- if (m)
- m_freem(m);
- return (error);
- }
- static void
- udp_detach(inp)
- struct inpcb *inp;
- {
- int s = splnet();
- if (inp == udp_last_inpcb)
- udp_last_inpcb = NULL;
- in_pcbdetach(inp);
- splx(s);
- }
- #ifdef SYSCTL_SUPPORT
- /*
- * Sysctl for udp variables.
- */
- udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
- int *name;
- u_int namelen;
- void *oldp;
- size_t *oldlenp;
- void *newp;
- size_t newlen;
- {
- /*
- * XXX - This event cannot currently occur: the udp_sysctl() routine
- * is only called by the Unix sysctl command which is not supported
- * by VxWorks
- #ifdef WV_INSTRUMENTATION
- #ifdef INCLUDE_WVNET /@ WV_NET_INFO event @/
- WV_NET_MARKER_1 (NET_AUX_EVENT, WV_NET_INFO, 51, 15,
- WV_NETEVENT_UDPCTRL_START, name[0])
- #endif /@ INCLUDE_WVNET @/
- #endif
- * XXX - end of unused event
- */
- /* All sysctl names at this level are terminal. */
- if (namelen != 1)
- return (ENOTDIR);
- switch (name[0]) {
- case UDPCTL_CHECKSUM:
- return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum));
- default:
- return (ENOPROTOOPT);
- }
- /* NOTREACHED */
- }
- #endif /* SYSCTL_SUPPORT */