Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files. =================================================================== RCS file: /ftp/cvs/cvsroot/src/sys/netinet/udp_usrreq.c,v rcsdiff: /ftp/cvs/cvsroot/src/sys/netinet/udp_usrreq.c,v: warning: Unknown phrases like `commitid ...;' are present. retrieving revision 1.1.1.2 retrieving revision 1.3 diff -u -p -r1.1.1.2 -r1.3 --- src/sys/netinet/udp_usrreq.c 1998/01/05 09:54:30 1.1.1.2 +++ src/sys/netinet/udp_usrreq.c 1993/05/22 11:42:52 1.3 @@ -1,6 +1,6 @@ /* - * Copyright (c) 1982, 1986, 1988, 1990, 1993 - * The Regents of the University of California. All rights reserved. + * Copyright (c) 1982, 1986, 1988, 1990 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 @@ -30,54 +30,51 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * @(#)udp_usrreq.c 8.4 (Berkeley) 1/21/94 + * from: @(#)udp_usrreq.c 7.20 (Berkeley) 4/20/91 + * $Id: udp_usrreq.c,v 1.3 1993/05/22 11:42:52 cgd Exp $ */ -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#include -#include -#include -#include -#include -#include -#include -#include +#include "param.h" +#include "malloc.h" +#include "mbuf.h" +#include "protosw.h" +#include "socket.h" +#include "socketvar.h" +#include "stat.h" + +#include "../net/if.h" +#include "../net/route.h" + +#include "in.h" +#include "in_systm.h" +#include "ip.h" +#include "in_pcb.h" +#include "ip_var.h" +#include "ip_icmp.h" +#include "udp.h" +#include "udp_var.h" + +struct inpcb *udp_last_inpcb = &udb; /* * UDP protocol implementation. * Per RFC 768, August, 1980. */ +udp_init() +{ + + udb.inp_next = udb.inp_prev = &udb; +} + #ifndef COMPAT_42 int udpcksum = 1; #else int udpcksum = 0; /* XXX */ #endif +int udp_ttl = UDP_TTL; struct sockaddr_in udp_in = { sizeof(udp_in), AF_INET }; -struct inpcb *udp_last_inpcb = &udb; - -static void udp_detach __P((struct inpcb *)); -static void udp_notify __P((struct inpcb *, int)); -static struct mbuf *udp_saveopt __P((caddr_t, int, int)); -void -udp_init() -{ - udb.inp_next = udb.inp_prev = &udb; -} - -void udp_input(m, iphlen) register struct mbuf *m; int iphlen; @@ -149,95 +146,6 @@ udp_input(m, iphlen) } } - if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) || - 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.inp_next; inp != &udb; inp = inp->inp_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) { - if (sbappendaddr(&last->so_rcv, - (struct sockaddr *)&udp_in, - n, (struct mbuf *)0) == 0) { - 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.) - */ - udpstat.udps_noportbcast++; - goto bad; - } - if (sbappendaddr(&last->so_rcv, (struct sockaddr *)&udp_in, - m, (struct mbuf *)0) == 0) { - udpstat.udps_fullsock++; - goto bad; - } - sorwakeup(last); - return; - } /* * Locate pcb for datagram. */ @@ -253,14 +161,15 @@ udp_input(m, iphlen) udpstat.udpps_pcbcachemiss++; } if (inp == 0) { + /* don't send ICMP response for broadcast packet */ udpstat.udps_noport++; - if (m->m_flags & (M_BCAST | M_MCAST)) { + if (m->m_flags & M_BCAST) { udpstat.udps_noportbcast++; goto bad; } *ip = save_ip; ip->ip_len += iphlen; - icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); + icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT); return; } @@ -272,6 +181,7 @@ udp_input(m, iphlen) udp_in.sin_addr = ip->ip_src; if (inp->inp_flags & INP_CONTROLOPTS) { struct mbuf **mp = &opts; + struct mbuf *udp_saveopt(); if (inp->inp_flags & INP_RECVDSTADDR) { *mp = udp_saveopt((caddr_t) &ip->ip_dst, @@ -329,7 +239,7 @@ udp_saveopt(p, size, type) if ((m = m_get(M_DONTWAIT, MT_CONTROL)) == NULL) return ((struct mbuf *) NULL); cp = (struct cmsghdr *) mtod(m, struct cmsghdr *); - bcopy(p, CMSG_DATA(cp), size); + bcopy(p, (caddr_t)(cp + 1), size); size += sizeof(*cp); m->m_len = size; cp->cmsg_len = size; @@ -342,17 +252,15 @@ udp_saveopt(p, size, type) * Notify a udp user of an asynchronous error; * just wake up so that he can collect error status. */ -static void udp_notify(inp, errno) register struct inpcb *inp; - int errno; { + inp->inp_socket->so_error = errno; sorwakeup(inp->inp_socket); sowwakeup(inp->inp_socket); } -void udp_ctlinput(cmd, sa, ip) int cmd; struct sockaddr *sa; @@ -362,8 +270,7 @@ udp_ctlinput(cmd, sa, ip) extern struct in_addr zeroin_addr; extern u_char inetctlerrmap[]; - if (!PRC_IS_REDIRECT(cmd) && - ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0)) + if ((unsigned)cmd > PRC_NCMDS || inetctlerrmap[cmd] == 0) return; if (ip) { uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); @@ -373,7 +280,6 @@ udp_ctlinput(cmd, sa, ip) 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; @@ -412,11 +318,7 @@ udp_output(inp, m, addr, control) * 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; - goto release; - } + M_PREPEND(m, sizeof(struct udpiphdr), M_WAIT); /* * Fill in mbuf with extended UDP header @@ -446,8 +348,7 @@ udp_output(inp, m, addr, control) ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */ udpstat.udps_opackets++; error = ip_output(m, inp->inp_options, &inp->inp_route, - inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), - inp->inp_moptions); + inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST)); if (addr) { in_pcbdisconnect(inp); @@ -466,7 +367,6 @@ u_long udp_recvspace = 40 * (1024 + size /* 40 1K datagrams */ /*ARGSUSED*/ -int udp_usrreq(so, req, m, addr, control) struct socket *so; int req; @@ -502,7 +402,7 @@ udp_usrreq(so, req, m, addr, control) error = soreserve(so, udp_sendspace, udp_recvspace); if (error) break; - ((struct inpcb *) so->so_pcb)->inp_ip.ip_ttl = ip_defttl; + ((struct inpcb *) so->so_pcb)->inp_ip.ip_ttl = udp_ttl; break; case PRU_DETACH: @@ -603,7 +503,6 @@ release: return (error); } -static void udp_detach(inp) struct inpcb *inp; { @@ -614,27 +513,3 @@ udp_detach(inp) in_pcbdetach(inp); splx(s); } - -/* - * 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; -{ - /* 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 */ -}