[39e6e65a] | 1 | /* |
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| 2 | * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995 |
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| 3 | * The Regents of the University of California. All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * 1. Redistributions of source code must retain the above copyright |
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| 9 | * notice, this list of conditions and the following disclaimer. |
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer in the |
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| 12 | * documentation and/or other materials provided with the distribution. |
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| 13 | * 3. All advertising materials mentioning features or use of this software |
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| 14 | * must display the following acknowledgement: |
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| 15 | * This product includes software developed by the University of |
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| 16 | * California, Berkeley and its contributors. |
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| 17 | * 4. Neither the name of the University nor the names of its contributors |
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| 18 | * may be used to endorse or promote products derived from this software |
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| 19 | * without specific prior written permission. |
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| 20 | * |
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 31 | * SUCH DAMAGE. |
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| 32 | * |
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| 33 | * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 |
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| 34 | * $Id$ |
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| 35 | */ |
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| 36 | |
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| 37 | #include <sys/param.h> |
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| 38 | #include <sys/queue.h> |
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| 39 | #include <sys/systm.h> |
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| 40 | #include <sys/malloc.h> |
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| 41 | #include <sys/mbuf.h> |
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| 42 | #include <sys/protosw.h> |
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| 43 | #include <sys/socket.h> |
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| 44 | #include <sys/socketvar.h> |
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| 45 | #include <sys/errno.h> |
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| 46 | #include <sys/stat.h> |
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| 47 | #include <sys/kernel.h> |
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| 48 | #include <sys/sysctl.h> |
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| 49 | #include <sys/syslog.h> |
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| 50 | |
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| 51 | #include <net/if.h> |
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| 52 | #include <net/route.h> |
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| 53 | |
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| 54 | #include <netinet/in.h> |
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| 55 | #include <netinet/in_systm.h> |
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| 56 | #include <netinet/ip.h> |
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| 57 | #include <netinet/in_pcb.h> |
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| 58 | #include <netinet/in_var.h> |
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| 59 | #include <netinet/ip_var.h> |
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| 60 | #include <netinet/ip_icmp.h> |
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| 61 | #include <netinet/udp.h> |
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| 62 | #include <netinet/udp_var.h> |
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| 63 | |
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| 64 | /* |
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| 65 | * UDP protocol implementation. |
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| 66 | * Per RFC 768, August, 1980. |
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| 67 | */ |
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| 68 | #ifndef COMPAT_42 |
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| 69 | static int udpcksum = 1; |
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| 70 | #else |
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| 71 | static int udpcksum = 0; /* XXX */ |
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| 72 | #endif |
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| 73 | SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW, |
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| 74 | &udpcksum, 0, ""); |
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| 75 | |
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| 76 | static int log_in_vain = 0; |
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| 77 | SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW, |
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| 78 | &log_in_vain, 0, ""); |
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| 79 | |
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| 80 | static struct inpcbhead udb; /* from udp_var.h */ |
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| 81 | static struct inpcbinfo udbinfo; |
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| 82 | |
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| 83 | #ifndef UDBHASHSIZE |
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| 84 | #define UDBHASHSIZE 64 |
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| 85 | #endif |
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| 86 | |
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| 87 | struct udpstat udpstat; /* from udp_var.h */ |
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| 88 | SYSCTL_STRUCT(_net_inet_udp, UDPCTL_STATS, stats, CTLFLAG_RD, |
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| 89 | &udpstat, udpstat, ""); |
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| 90 | |
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| 91 | static struct sockaddr_in udp_in = { sizeof(udp_in), AF_INET }; |
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| 92 | |
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| 93 | static void udp_detach __P((struct inpcb *)); |
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| 94 | static int udp_output __P((struct inpcb *, struct mbuf *, struct mbuf *, |
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| 95 | struct mbuf *)); |
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| 96 | static void udp_notify __P((struct inpcb *, int)); |
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| 97 | |
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| 98 | void |
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| 99 | udp_init() |
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| 100 | { |
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| 101 | LIST_INIT(&udb); |
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| 102 | udbinfo.listhead = &udb; |
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| 103 | udbinfo.hashbase = hashinit(UDBHASHSIZE, M_PCB, &udbinfo.hashmask); |
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| 104 | } |
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| 105 | |
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| 106 | void |
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| 107 | udp_input(m, iphlen) |
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| 108 | register struct mbuf *m; |
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| 109 | int iphlen; |
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| 110 | { |
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| 111 | register struct ip *ip; |
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| 112 | register struct udphdr *uh; |
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| 113 | register struct inpcb *inp; |
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| 114 | struct mbuf *opts = 0; |
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| 115 | int len; |
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| 116 | struct ip save_ip; |
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| 117 | |
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| 118 | udpstat.udps_ipackets++; |
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| 119 | |
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| 120 | /* |
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| 121 | * Strip IP options, if any; should skip this, |
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| 122 | * make available to user, and use on returned packets, |
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| 123 | * but we don't yet have a way to check the checksum |
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| 124 | * with options still present. |
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| 125 | */ |
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| 126 | if (iphlen > sizeof (struct ip)) { |
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| 127 | ip_stripoptions(m, (struct mbuf *)0); |
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| 128 | iphlen = sizeof(struct ip); |
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| 129 | } |
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| 130 | |
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| 131 | /* |
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| 132 | * Get IP and UDP header together in first mbuf. |
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| 133 | */ |
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| 134 | ip = mtod(m, struct ip *); |
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| 135 | if (m->m_len < iphlen + sizeof(struct udphdr)) { |
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| 136 | if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { |
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| 137 | udpstat.udps_hdrops++; |
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| 138 | return; |
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| 139 | } |
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| 140 | ip = mtod(m, struct ip *); |
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| 141 | } |
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| 142 | uh = (struct udphdr *)((caddr_t)ip + iphlen); |
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| 143 | |
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| 144 | /* |
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| 145 | * Make mbuf data length reflect UDP length. |
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| 146 | * If not enough data to reflect UDP length, drop. |
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| 147 | */ |
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| 148 | len = ntohs((u_short)uh->uh_ulen); |
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| 149 | if (ip->ip_len != len) { |
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| 150 | if (len > ip->ip_len || len < sizeof(struct udphdr)) { |
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| 151 | udpstat.udps_badlen++; |
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| 152 | goto bad; |
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| 153 | } |
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| 154 | m_adj(m, len - ip->ip_len); |
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| 155 | /* ip->ip_len = len; */ |
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| 156 | } |
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| 157 | /* |
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| 158 | * Save a copy of the IP header in case we want restore it |
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| 159 | * for sending an ICMP error message in response. |
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| 160 | */ |
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| 161 | save_ip = *ip; |
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| 162 | |
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| 163 | /* |
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| 164 | * Checksum extended UDP header and data. |
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| 165 | */ |
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| 166 | if (uh->uh_sum) { |
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| 167 | ((struct ipovly *)ip)->ih_next = 0; |
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| 168 | ((struct ipovly *)ip)->ih_prev = 0; |
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| 169 | ((struct ipovly *)ip)->ih_x1 = 0; |
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| 170 | ((struct ipovly *)ip)->ih_len = uh->uh_ulen; |
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| 171 | uh->uh_sum = in_cksum(m, len + sizeof (struct ip)); |
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| 172 | if (uh->uh_sum) { |
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| 173 | udpstat.udps_badsum++; |
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| 174 | m_freem(m); |
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| 175 | return; |
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| 176 | } |
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| 177 | } |
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| 178 | |
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| 179 | if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) || |
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| 180 | in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) { |
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| 181 | struct inpcb *last; |
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| 182 | /* |
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| 183 | * Deliver a multicast or broadcast datagram to *all* sockets |
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| 184 | * for which the local and remote addresses and ports match |
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| 185 | * those of the incoming datagram. This allows more than |
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| 186 | * one process to receive multi/broadcasts on the same port. |
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| 187 | * (This really ought to be done for unicast datagrams as |
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| 188 | * well, but that would cause problems with existing |
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| 189 | * applications that open both address-specific sockets and |
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| 190 | * a wildcard socket listening to the same port -- they would |
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| 191 | * end up receiving duplicates of every unicast datagram. |
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| 192 | * Those applications open the multiple sockets to overcome an |
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| 193 | * inadequacy of the UDP socket interface, but for backwards |
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| 194 | * compatibility we avoid the problem here rather than |
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| 195 | * fixing the interface. Maybe 4.5BSD will remedy this?) |
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| 196 | */ |
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| 197 | |
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| 198 | /* |
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| 199 | * Construct sockaddr format source address. |
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| 200 | */ |
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| 201 | udp_in.sin_port = uh->uh_sport; |
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| 202 | udp_in.sin_addr = ip->ip_src; |
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| 203 | m->m_len -= sizeof (struct udpiphdr); |
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| 204 | m->m_data += sizeof (struct udpiphdr); |
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| 205 | /* |
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| 206 | * Locate pcb(s) for datagram. |
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| 207 | * (Algorithm copied from raw_intr().) |
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| 208 | */ |
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| 209 | last = NULL; |
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| 210 | for (inp = udb.lh_first; inp != NULL; inp = inp->inp_list.le_next) { |
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| 211 | if (inp->inp_lport != uh->uh_dport) |
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| 212 | continue; |
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| 213 | if (inp->inp_laddr.s_addr != INADDR_ANY) { |
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| 214 | if (inp->inp_laddr.s_addr != |
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| 215 | ip->ip_dst.s_addr) |
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| 216 | continue; |
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| 217 | } |
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| 218 | if (inp->inp_faddr.s_addr != INADDR_ANY) { |
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| 219 | if (inp->inp_faddr.s_addr != |
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| 220 | ip->ip_src.s_addr || |
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| 221 | inp->inp_fport != uh->uh_sport) |
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| 222 | continue; |
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| 223 | } |
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| 224 | |
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| 225 | if (last != NULL) { |
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| 226 | struct mbuf *n; |
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| 227 | |
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| 228 | if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { |
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| 229 | if (last->inp_flags & INP_CONTROLOPTS |
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| 230 | || last->inp_socket->so_options & SO_TIMESTAMP) |
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| 231 | ip_savecontrol(last, &opts, ip, n); |
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| 232 | if (sbappendaddr(&last->inp_socket->so_rcv, |
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| 233 | (struct sockaddr *)&udp_in, |
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| 234 | n, opts) == 0) { |
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| 235 | m_freem(n); |
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| 236 | if (opts) |
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| 237 | m_freem(opts); |
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| 238 | udpstat.udps_fullsock++; |
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| 239 | } else |
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| 240 | sorwakeup(last->inp_socket); |
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| 241 | opts = 0; |
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| 242 | } |
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| 243 | } |
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| 244 | last = inp; |
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| 245 | /* |
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| 246 | * Don't look for additional matches if this one does |
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| 247 | * not have either the SO_REUSEPORT or SO_REUSEADDR |
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| 248 | * socket options set. This heuristic avoids searching |
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| 249 | * through all pcbs in the common case of a non-shared |
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| 250 | * port. It * assumes that an application will never |
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| 251 | * clear these options after setting them. |
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| 252 | */ |
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[ff0f694d] | 253 | if (((last->inp_socket->so_options&(SO_REUSEPORT|SO_REUSEADDR)) == 0)) |
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[39e6e65a] | 254 | break; |
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| 255 | } |
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| 256 | |
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| 257 | if (last == NULL) { |
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| 258 | /* |
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| 259 | * No matching pcb found; discard datagram. |
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| 260 | * (No need to send an ICMP Port Unreachable |
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| 261 | * for a broadcast or multicast datgram.) |
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| 262 | */ |
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| 263 | udpstat.udps_noportbcast++; |
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| 264 | goto bad; |
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| 265 | } |
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| 266 | if (last->inp_flags & INP_CONTROLOPTS |
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| 267 | || last->inp_socket->so_options & SO_TIMESTAMP) |
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| 268 | ip_savecontrol(last, &opts, ip, m); |
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| 269 | if (sbappendaddr(&last->inp_socket->so_rcv, |
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| 270 | (struct sockaddr *)&udp_in, |
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| 271 | m, opts) == 0) { |
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| 272 | udpstat.udps_fullsock++; |
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| 273 | goto bad; |
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| 274 | } |
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| 275 | sorwakeup(last->inp_socket); |
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| 276 | return; |
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| 277 | } |
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| 278 | /* |
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| 279 | * Locate pcb for datagram. |
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| 280 | */ |
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| 281 | inp = in_pcblookuphash(&udbinfo, ip->ip_src, uh->uh_sport, |
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| 282 | ip->ip_dst, uh->uh_dport, 1); |
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| 283 | if (inp == NULL) { |
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| 284 | if (log_in_vain) { |
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| 285 | char buf[4*sizeof "123"]; |
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| 286 | |
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| 287 | strcpy(buf, inet_ntoa(ip->ip_dst)); |
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| 288 | log(LOG_INFO, "Connection attempt to UDP %s:%d" |
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| 289 | " from %s:%d\n", |
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| 290 | buf, ntohs(uh->uh_dport), |
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| 291 | inet_ntoa(ip->ip_src), ntohs(uh->uh_sport)); |
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| 292 | } |
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| 293 | udpstat.udps_noport++; |
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| 294 | if (m->m_flags & (M_BCAST | M_MCAST)) { |
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| 295 | udpstat.udps_noportbcast++; |
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| 296 | goto bad; |
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| 297 | } |
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| 298 | *ip = save_ip; |
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| 299 | icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); |
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| 300 | return; |
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| 301 | } |
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| 302 | |
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| 303 | /* |
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| 304 | * Construct sockaddr format source address. |
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| 305 | * Stuff source address and datagram in user buffer. |
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| 306 | */ |
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| 307 | udp_in.sin_port = uh->uh_sport; |
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| 308 | udp_in.sin_addr = ip->ip_src; |
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| 309 | if (inp->inp_flags & INP_CONTROLOPTS |
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| 310 | || inp->inp_socket->so_options & SO_TIMESTAMP) |
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| 311 | ip_savecontrol(inp, &opts, ip, m); |
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| 312 | iphlen += sizeof(struct udphdr); |
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| 313 | m->m_len -= iphlen; |
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| 314 | m->m_pkthdr.len -= iphlen; |
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| 315 | m->m_data += iphlen; |
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| 316 | if (sbappendaddr(&inp->inp_socket->so_rcv, (struct sockaddr *)&udp_in, |
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| 317 | m, opts) == 0) { |
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| 318 | udpstat.udps_fullsock++; |
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| 319 | goto bad; |
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| 320 | } |
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| 321 | sorwakeup(inp->inp_socket); |
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| 322 | return; |
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| 323 | bad: |
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| 324 | m_freem(m); |
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| 325 | if (opts) |
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| 326 | m_freem(opts); |
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| 327 | } |
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| 328 | |
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| 329 | /* |
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| 330 | * Notify a udp user of an asynchronous error; |
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| 331 | * just wake up so that he can collect error status. |
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| 332 | */ |
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| 333 | static void |
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| 334 | udp_notify(inp, errnum) |
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| 335 | register struct inpcb *inp; |
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| 336 | int errnum; |
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| 337 | { |
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| 338 | inp->inp_socket->so_error = errnum; |
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| 339 | sorwakeup(inp->inp_socket); |
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| 340 | sowwakeup(inp->inp_socket); |
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| 341 | } |
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| 342 | |
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| 343 | void |
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| 344 | udp_ctlinput(cmd, sa, vip) |
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| 345 | int cmd; |
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| 346 | struct sockaddr *sa; |
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| 347 | void *vip; |
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| 348 | { |
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| 349 | register struct ip *ip = vip; |
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| 350 | register struct udphdr *uh; |
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| 351 | |
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| 352 | if (!PRC_IS_REDIRECT(cmd) && |
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| 353 | ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0)) |
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| 354 | return; |
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| 355 | if (ip) { |
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| 356 | uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); |
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| 357 | in_pcbnotify(&udb, sa, uh->uh_dport, ip->ip_src, uh->uh_sport, |
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| 358 | cmd, udp_notify); |
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| 359 | } else |
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| 360 | in_pcbnotify(&udb, sa, 0, zeroin_addr, 0, cmd, udp_notify); |
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| 361 | } |
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| 362 | |
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| 363 | static int |
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| 364 | udp_output(inp, m, addr, control) |
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| 365 | register struct inpcb *inp; |
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| 366 | register struct mbuf *m; |
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| 367 | struct mbuf *addr, *control; |
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| 368 | { |
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| 369 | register struct udpiphdr *ui; |
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| 370 | register int len = m->m_pkthdr.len; |
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| 371 | struct in_addr laddr; |
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| 372 | int s = 0, error = 0; |
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| 373 | |
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| 374 | if (control) |
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| 375 | m_freem(control); /* XXX */ |
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| 376 | |
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| 377 | if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) { |
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| 378 | error = EMSGSIZE; |
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| 379 | goto release; |
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| 380 | } |
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| 381 | |
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| 382 | if (addr) { |
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| 383 | laddr = inp->inp_laddr; |
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| 384 | if (inp->inp_faddr.s_addr != INADDR_ANY) { |
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| 385 | error = EISCONN; |
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| 386 | goto release; |
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| 387 | } |
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| 388 | /* |
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| 389 | * Must block input while temporarily connected. |
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| 390 | */ |
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| 391 | s = splnet(); |
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| 392 | error = in_pcbconnect(inp, addr); |
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| 393 | if (error) { |
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| 394 | splx(s); |
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| 395 | goto release; |
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| 396 | } |
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| 397 | } else { |
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| 398 | if (inp->inp_faddr.s_addr == INADDR_ANY) { |
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| 399 | error = ENOTCONN; |
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| 400 | goto release; |
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| 401 | } |
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| 402 | } |
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| 403 | /* |
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| 404 | * Calculate data length and get a mbuf |
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| 405 | * for UDP and IP headers. |
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| 406 | */ |
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| 407 | M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT); |
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| 408 | if (m == 0) { |
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| 409 | error = ENOBUFS; |
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| 410 | if (addr) |
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| 411 | splx(s); |
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| 412 | goto release; |
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| 413 | } |
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| 414 | |
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| 415 | /* |
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| 416 | * Fill in mbuf with extended UDP header |
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| 417 | * and addresses and length put into network format. |
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| 418 | */ |
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| 419 | ui = mtod(m, struct udpiphdr *); |
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| 420 | ui->ui_next = ui->ui_prev = 0; |
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| 421 | ui->ui_x1 = 0; |
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| 422 | ui->ui_pr = IPPROTO_UDP; |
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| 423 | ui->ui_len = htons((u_short)len + sizeof (struct udphdr)); |
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| 424 | ui->ui_src = inp->inp_laddr; |
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| 425 | ui->ui_dst = inp->inp_faddr; |
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| 426 | ui->ui_sport = inp->inp_lport; |
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| 427 | ui->ui_dport = inp->inp_fport; |
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| 428 | ui->ui_ulen = ui->ui_len; |
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| 429 | |
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| 430 | /* |
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| 431 | * Stuff checksum and output datagram. |
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| 432 | */ |
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| 433 | ui->ui_sum = 0; |
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| 434 | if (udpcksum) { |
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| 435 | if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0) |
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| 436 | ui->ui_sum = 0xffff; |
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| 437 | } |
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| 438 | ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len; |
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| 439 | ((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */ |
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| 440 | ((struct ip *)ui)->ip_tos = inp->inp_ip_tos; /* XXX */ |
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| 441 | udpstat.udps_opackets++; |
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| 442 | error = ip_output(m, inp->inp_options, &inp->inp_route, |
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| 443 | inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), |
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| 444 | inp->inp_moptions); |
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| 445 | |
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| 446 | if (addr) { |
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| 447 | in_pcbdisconnect(inp); |
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| 448 | inp->inp_laddr = laddr; |
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| 449 | splx(s); |
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| 450 | } |
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| 451 | return (error); |
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| 452 | |
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| 453 | release: |
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| 454 | m_freem(m); |
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| 455 | return (error); |
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| 456 | } |
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| 457 | |
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| 458 | static u_long udp_sendspace = 9216; /* really max datagram size */ |
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| 459 | /* 40 1K datagrams */ |
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| 460 | SYSCTL_INT(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW, |
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| 461 | &udp_sendspace, 0, ""); |
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| 462 | |
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| 463 | static u_long udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); |
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| 464 | SYSCTL_INT(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW, |
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| 465 | &udp_recvspace, 0, ""); |
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| 466 | |
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| 467 | /*ARGSUSED*/ |
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| 468 | int |
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| 469 | udp_usrreq(so, req, m, addr, control) |
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| 470 | struct socket *so; |
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| 471 | int req; |
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| 472 | struct mbuf *m, *addr, *control; |
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| 473 | { |
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| 474 | struct inpcb *inp = sotoinpcb(so); |
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| 475 | int error = 0; |
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| 476 | int s; |
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| 477 | |
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| 478 | if (req == PRU_CONTROL) |
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| 479 | return (in_control(so, (u_long)m, (caddr_t)addr, |
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| 480 | (struct ifnet *)control)); |
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| 481 | if (inp == NULL && req != PRU_ATTACH) { |
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| 482 | error = EINVAL; |
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| 483 | goto release; |
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| 484 | } |
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| 485 | /* |
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| 486 | * Note: need to block udp_input while changing |
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| 487 | * the udp pcb queue and/or pcb addresses. |
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| 488 | */ |
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| 489 | switch (req) { |
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| 490 | |
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| 491 | case PRU_ATTACH: |
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| 492 | if (inp != NULL) { |
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| 493 | error = EINVAL; |
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| 494 | break; |
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| 495 | } |
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| 496 | s = splnet(); |
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| 497 | error = in_pcballoc(so, &udbinfo); |
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| 498 | splx(s); |
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| 499 | if (error) |
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| 500 | break; |
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| 501 | error = soreserve(so, udp_sendspace, udp_recvspace); |
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| 502 | if (error) |
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| 503 | break; |
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| 504 | ((struct inpcb *) so->so_pcb)->inp_ip_ttl = ip_defttl; |
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| 505 | break; |
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| 506 | |
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| 507 | case PRU_DETACH: |
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| 508 | udp_detach(inp); |
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| 509 | break; |
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| 510 | |
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| 511 | case PRU_BIND: |
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| 512 | s = splnet(); |
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| 513 | error = in_pcbbind(inp, addr); |
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| 514 | splx(s); |
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| 515 | break; |
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| 516 | |
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| 517 | case PRU_LISTEN: |
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| 518 | error = EOPNOTSUPP; |
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| 519 | break; |
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| 520 | |
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| 521 | case PRU_CONNECT: |
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| 522 | if (inp->inp_faddr.s_addr != INADDR_ANY) { |
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| 523 | error = EISCONN; |
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| 524 | break; |
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| 525 | } |
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| 526 | s = splnet(); |
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| 527 | error = in_pcbconnect(inp, addr); |
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| 528 | splx(s); |
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| 529 | if (error == 0) |
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| 530 | soisconnected(so); |
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| 531 | break; |
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| 532 | |
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| 533 | case PRU_CONNECT2: |
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| 534 | error = EOPNOTSUPP; |
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| 535 | break; |
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| 536 | |
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| 537 | case PRU_ACCEPT: |
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| 538 | error = EOPNOTSUPP; |
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| 539 | break; |
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| 540 | |
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| 541 | case PRU_DISCONNECT: |
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| 542 | if (inp->inp_faddr.s_addr == INADDR_ANY) { |
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| 543 | error = ENOTCONN; |
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| 544 | break; |
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| 545 | } |
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| 546 | s = splnet(); |
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| 547 | in_pcbdisconnect(inp); |
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| 548 | inp->inp_laddr.s_addr = INADDR_ANY; |
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| 549 | splx(s); |
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| 550 | so->so_state &= ~SS_ISCONNECTED; /* XXX */ |
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| 551 | break; |
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| 552 | |
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| 553 | case PRU_SHUTDOWN: |
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| 554 | socantsendmore(so); |
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| 555 | break; |
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| 556 | |
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| 557 | case PRU_SEND: |
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| 558 | return (udp_output(inp, m, addr, control)); |
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| 559 | |
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| 560 | case PRU_ABORT: |
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| 561 | soisdisconnected(so); |
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| 562 | udp_detach(inp); |
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| 563 | break; |
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| 564 | |
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| 565 | case PRU_SOCKADDR: |
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| 566 | in_setsockaddr(inp, addr); |
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| 567 | break; |
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| 568 | |
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| 569 | case PRU_PEERADDR: |
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| 570 | in_setpeeraddr(inp, addr); |
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| 571 | break; |
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| 572 | |
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| 573 | case PRU_SENSE: |
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| 574 | /* |
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| 575 | * stat: don't bother with a blocksize. |
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| 576 | */ |
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| 577 | return (0); |
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| 578 | |
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| 579 | case PRU_SENDOOB: |
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| 580 | case PRU_FASTTIMO: |
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| 581 | case PRU_SLOWTIMO: |
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| 582 | case PRU_PROTORCV: |
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| 583 | case PRU_PROTOSEND: |
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| 584 | error = EOPNOTSUPP; |
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| 585 | break; |
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| 586 | |
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| 587 | case PRU_RCVD: |
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| 588 | case PRU_RCVOOB: |
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| 589 | return (EOPNOTSUPP); /* do not free mbuf's */ |
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| 590 | |
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| 591 | default: |
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| 592 | panic("udp_usrreq"); |
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| 593 | } |
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| 594 | |
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| 595 | release: |
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| 596 | if (control) { |
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| 597 | printf("udp control data unexpectedly retained\n"); |
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| 598 | m_freem(control); |
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| 599 | } |
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| 600 | if (m) |
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| 601 | m_freem(m); |
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| 602 | return (error); |
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| 603 | } |
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| 604 | |
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| 605 | static void |
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| 606 | udp_detach(inp) |
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| 607 | struct inpcb *inp; |
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| 608 | { |
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| 609 | int s = splnet(); |
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| 610 | |
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| 611 | in_pcbdetach(inp); |
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| 612 | splx(s); |
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| 613 | } |
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