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-rw-r--r--slirp2/udp.c495
1 files changed, 0 insertions, 495 deletions
diff --git a/slirp2/udp.c b/slirp2/udp.c
deleted file mode 100644
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--- a/slirp2/udp.c
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@@ -1,495 +0,0 @@
-/*
- * Copyright (c) 1982, 1986, 1988, 1990, 1993
- * 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 8.4 (Berkeley) 1/21/94
- * udp_usrreq.c,v 1.4 1994/10/02 17:48:45 phk Exp
- */
-
-/*
- * Changes and additions relating to SLiRP
- * Copyright (c) 1995 Danny Gasparovski.
- *
- * Please read the file COPYRIGHT for the
- * terms and conditions of the copyright.
- */
-
-#include <slirp.h>
-#include "ip_icmp.h"
-#define SLIRP_COMPILATION 1
-#include "sockets.h"
-
-struct udpstat udpstat;
-
-struct socket udb;
-
-/*
- * UDP protocol implementation.
- * Per RFC 768, August, 1980.
- */
-#ifndef COMPAT_42
-int udpcksum = 1;
-#else
-int udpcksum = 0; /* XXX */
-#endif
-
-struct socket *udp_last_so = &udb;
-
-void
-udp_init()
-{
- udb.so_next = udb.so_prev = &udb;
-}
-/* m->m_data points at ip packet header
- * m->m_len length ip packet
- * ip->ip_len length data (IPDU)
- */
-void
-udp_input(m, iphlen)
- register MBuf m;
- int iphlen;
-{
- register struct ip *ip;
- register struct udphdr *uh;
-/* MBuf opts = 0;*/
- int len;
- struct ip save_ip;
- struct socket *so;
-
- DEBUG_CALL("udp_input");
- DEBUG_ARG("m = %lx", (long)m);
- DEBUG_ARG("iphlen = %d", iphlen);
-
- 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, (MBuf )0);
- iphlen = sizeof(struct ip);
- }
-
- /*
- * Get IP and UDP header together in first mbuf.
- */
- ip = MBUF_TO(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_int16_t)uh->uh_ulen);
-
- if (ip->ip_len != len) {
- if (len > ip->ip_len) {
- udpstat.udps_badlen++;
- goto bad;
- }
- mbuf_trim(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;
- save_ip.ip_len+= iphlen; /* tcp_input subtracts this */
-
- /*
- * Checksum extended UDP header and data.
- */
- if (udpcksum && uh->uh_sum) {
- memset(&((struct ipovly *)ip)->ih_mbuf, 0, sizeof(struct mbuf_ptr));
- ((struct ipovly *)ip)->ih_x1 = 0;
- ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
- /* keep uh_sum for ICMP reply
- * uh->uh_sum = cksum(m, len + sizeof (struct ip));
- * if (uh->uh_sum) {
- */
- if(cksum(m, len + sizeof(struct ip))) {
- udpstat.udps_badsum++;
- goto bad;
- }
- }
-
- /*
- * handle DHCP/BOOTP
- */
- if (port_geth(uh->uh_dport) == BOOTP_SERVER) {
- bootp_input(m);
- goto bad;
- }
-
- /*
- * handle TFTP
- */
- if (port_geth(uh->uh_dport) == TFTP_SERVER) {
- tftp_input(m);
- goto bad;
- }
-
- /*
- * Locate pcb for datagram.
- */
- so = udp_last_so;
- if (so->so_laddr_port != port_geth(uh->uh_sport) ||
- so->so_laddr_ip != ip_geth(ip->ip_src)) {
- struct socket *tmp;
-
- for (tmp = udb.so_next; tmp != &udb; tmp = tmp->so_next) {
- if (tmp->so_laddr_port == port_geth(uh->uh_sport) &&
- tmp->so_laddr_ip == ip_geth(ip->ip_src)) {
- tmp->so_faddr_ip = ip_geth(ip->ip_dst);
- tmp->so_faddr_port = port_geth(uh->uh_dport);
- so = tmp;
- break;
- }
- }
- if (tmp == &udb) {
- so = NULL;
- } else {
- udpstat.udpps_pcbcachemiss++;
- udp_last_so = so;
- }
- }
-
- if (so == NULL) {
- /*
- * If there's no socket for this packet,
- * create one
- */
- if ((so = socreate()) == NULL) goto bad;
- if(udp_attach(so) == -1) {
- DEBUG_MISC((dfd," udp_attach errno = %d-%s\n",
- errno,errno_str));
- sofree(so);
- goto bad;
- }
-
- /*
- * Setup fields
- */
- /* udp_last_so = so; */
- so->so_laddr_ip = ip_geth(ip->ip_src);
- so->so_laddr_port = port_geth(uh->uh_sport);
-
- if ((so->so_iptos = udp_tos(so)) == 0)
- so->so_iptos = ip->ip_tos;
-
- /*
- * XXXXX Here, check if it's in udpexec_list,
- * and if it is, do the fork_exec() etc.
- */
- }
-
- so->so_faddr_ip = ip_geth(ip->ip_dst); /* XXX */
- so->so_faddr_port = port_geth(uh->uh_dport); /* XXX */
-
- iphlen += sizeof(struct udphdr);
- m->m_len -= iphlen;
- m->m_data += iphlen;
-
- /*
- * Now we sendto() the packet.
- */
- if (so->so_emu)
- udp_emu(so, m);
-
- if(sosendto(so,m) == -1) {
- m->m_len += iphlen;
- m->m_data -= iphlen;
- *ip=save_ip;
- DEBUG_MISC((dfd,"udp tx errno = %d-%s\n",errno, errno_str));
- icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,errno_str);
- }
-
- mbuf_free(so->so_m); /* used for ICMP if error on sorecvfrom */
-
- /* restore the orig mbuf packet */
- m->m_len += iphlen;
- m->m_data -= iphlen;
- *ip=save_ip;
- so->so_m=m; /* ICMP backup */
-
- return;
-bad:
- mbuf_free(m);
- /* if (opts) mbuf_free(opts); */
- return;
-}
-
-int udp_output2_(struct socket* so, MBuf m,
- const SockAddress* saddr,
- const SockAddress* daddr,
- int iptos)
-{
- register struct udpiphdr *ui;
- uint32_t saddr_ip = sock_address_get_ip(saddr);
- uint32_t daddr_ip = sock_address_get_ip(daddr);
- int saddr_port = sock_address_get_port(saddr);
- int daddr_port = sock_address_get_port(daddr);
- int error = 0;
-
- DEBUG_CALL("udp_output");
- DEBUG_ARG("so = %lx", (long)so);
- DEBUG_ARG("m = %lx", (long)m);
- DEBUG_ARG("saddr = %lx", (long) saddr_ip);
- DEBUG_ARG("daddr = %lx", (long) daddr_ip);
-
- /*
- * Adjust for header
- */
- m->m_data -= sizeof(struct udpiphdr);
- m->m_len += sizeof(struct udpiphdr);
-
- /*
- * Fill in mbuf with extended UDP header
- * and addresses and length put into network format.
- */
- ui = MBUF_TO(m, struct udpiphdr *);
- memset(&ui->ui_i.ih_mbuf, 0 , sizeof(struct mbuf_ptr));
- ui->ui_x1 = 0;
- ui->ui_pr = IPPROTO_UDP;
- ui->ui_len = htons(m->m_len - sizeof(struct ip)); /* + sizeof (struct udphdr)); */
- /* XXXXX Check for from-one-location sockets, or from-any-location sockets */
- ui->ui_src = ip_seth(saddr_ip);
- ui->ui_dst = ip_seth(daddr_ip);
- ui->ui_sport = port_seth(saddr_port);
- ui->ui_dport = port_seth(daddr_port);
- ui->ui_ulen = ui->ui_len;
-
- /*
- * Stuff checksum and output datagram.
- */
- ui->ui_sum = 0;
- if (udpcksum) {
- if ((ui->ui_sum = cksum(m, /* sizeof (struct udpiphdr) + */ m->m_len)) == 0)
- ui->ui_sum = 0xffff;
- }
- ((struct ip *)ui)->ip_len = m->m_len;
-
- ((struct ip *)ui)->ip_ttl = ip_defttl;
- ((struct ip *)ui)->ip_tos = iptos;
-
- udpstat.udps_opackets++;
-
- error = ip_output(so, m);
-
- return (error);
-}
-
-int udp_output_(struct socket *so, MBuf m, SockAddress* from)
-{
- SockAddress saddr, daddr;
- uint32_t saddr_ip;
- uint16_t saddr_port;
-
- saddr_ip = sock_address_get_ip(from);
- saddr_port = sock_address_get_port(from);
-
- if ((so->so_faddr_ip & 0xffffff00) == special_addr_ip) {
- saddr_ip = so->so_faddr_ip;
- if ((so->so_faddr_ip & 0x000000ff) == 0xff)
- saddr_ip = alias_addr_ip;
- }
-
- sock_address_init_inet( &saddr, saddr_ip, saddr_port );
- sock_address_init_inet( &daddr, so->so_laddr_ip, so->so_laddr_port );
-
- return udp_output2_(so, m, &saddr, &daddr, so->so_iptos);
-}
-
-int
-udp_attach(so)
- struct socket *so;
-{
- so->s = socket_anyaddr_server( 0, SOCKET_DGRAM );
- if (so->s != -1) {
- /* success, insert in queue */
- so->so_expire = curtime + SO_EXPIRE;
- insque(so,&udb);
- }
- return(so->s);
-}
-
-void
-udp_detach(so)
- struct socket *so;
-{
- socket_close(so->s);
- /* if (so->so_m) mbuf_free(so->so_m); done by sofree */
-
- sofree(so);
-}
-
-struct tos_t udptos[] = {
- {0, 53, IPTOS_LOWDELAY, 0}, /* DNS */
- {517, 517, IPTOS_LOWDELAY, EMU_TALK}, /* talk */
- {518, 518, IPTOS_LOWDELAY, EMU_NTALK}, /* ntalk */
- {0, 7648, IPTOS_LOWDELAY, EMU_CUSEEME}, /* Cu-Seeme */
- {0, 0, 0, 0}
-};
-
-u_int8_t
-udp_tos(so)
- struct socket *so;
-{
- int i = 0;
-
- while(udptos[i].tos) {
- if ((udptos[i].fport && so->so_faddr_port == udptos[i].fport) ||
- (udptos[i].lport && so->so_laddr_port == udptos[i].lport)) {
- so->so_emu = udptos[i].emu;
- return udptos[i].tos;
- }
- i++;
- }
-
- return 0;
-}
-
-/*
- * Here, talk/ytalk/ntalk requests must be emulated
- */
-void
-udp_emu(so, m)
- struct socket *so;
- MBuf m;
-{
- SockAddress sockaddr;
-
-struct cu_header {
- uint16_t d_family; // destination family
- uint16_t d_port; // destination port
- uint32_t d_addr; // destination address
- uint16_t s_family; // source family
- uint16_t s_port; // source port
- uint32_t so_addr; // source address
- uint32_t seqn; // sequence number
- uint16_t message; // message
- uint16_t data_type; // data type
- uint16_t pkt_len; // packet length
-} *cu_head;
-
- switch(so->so_emu) {
-
- case EMU_CUSEEME:
-
- /*
- * Cu-SeeMe emulation.
- * Hopefully the packet is more that 16 bytes long. We don't
- * do any other tests, just replace the address and port
- * fields.
- */
- if (m->m_len >= sizeof (*cu_head)) {
- if (socket_get_address(so->s, &sockaddr) < 0)
- return;
-
- cu_head = MBUF_TO(m, struct cu_header *);
- cu_head->s_port = htons( sock_address_get_port(&sockaddr));
- cu_head->so_addr = htonl( sock_address_get_ip(&sockaddr));
- }
-
- return;
- }
-}
-
-struct socket *
-udp_listen(port, laddr, lport, flags)
- u_int port;
- u_int32_t laddr;
- u_int lport;
- int flags;
-{
- struct socket *so;
- SockAddress addr;
- uint32_t addr_ip;
-
- if ((so = socreate()) == NULL) {
- free(so);
- return NULL;
- }
- so->s = socket_anyaddr_server( port, SOCKET_DGRAM );
- so->so_expire = curtime + SO_EXPIRE;
- so->so_haddr_port = port;
- insque(so,&udb);
-
- if (so->s < 0) {
- udp_detach(so);
- return NULL;
- }
-
- socket_get_address(so->s, &addr);
-
- so->so_faddr_port = sock_address_get_port(&addr);
- addr_ip = sock_address_get_ip(&addr);
-
- if (addr_ip == 0 || addr_ip == loopback_addr_ip)
- so->so_faddr_ip = alias_addr_ip;
- else
- so->so_faddr_ip = addr_ip;
-
- so->so_laddr_port = lport;
- so->so_laddr_ip = laddr;
- if (flags != SS_FACCEPTONCE)
- so->so_expire = 0;
-
- so->so_state = SS_ISFCONNECTED;
-
- return so;
-}
-
-int udp_unlisten (u_int port)
-{
- struct socket *so;
-
- for (so = udb.so_next; so != &udb; so = so->so_next) {
- if (so->so_haddr_port == port) {
- break;
- }
- }
-
- if (so == &udb)
- return -1;
-
- sofcantrcvmore( so );
- sofcantsendmore( so );
- socket_close( so->s );
- so->s = -1;
- sofree( so );
- return 0;
-}