[qemu.git] / slirp / udp.c

/*
 * 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. 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 "qemu/osdep.h"
#include <slirp.h>
#include "ip_icmp.h"

static uint8_t udp_tos(struct socket *so);

void
udp_init(Slirp *slirp)
{
    slirp->udb.so_next = slirp->udb.so_prev = &slirp->udb;
    slirp->udp_last_so = &slirp->udb;
}

void udp_cleanup(Slirp *slirp)
{
    while (slirp->udb.so_next != &slirp->udb) {
        udp_detach(slirp->udb.so_next);
    }
}

/* m->m_data  points at ip packet header
 * m->m_len   length ip packet
 * ip->ip_len length data (IPDU)
 */
void
udp_input(register struct mbuf *m, int iphlen)
{
	Slirp *slirp = m->slirp;
	register struct ip *ip;
	register struct udphdr *uh;
	int len;
	struct ip save_ip;
	struct socket *so;
	struct sockaddr_storage lhost;
	struct sockaddr_in *lhost4;

	DEBUG_CALL("udp_input");
	DEBUG_ARG("m = %p", m);
	DEBUG_ARG("iphlen = %d", iphlen);

	/*
	 * 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 *);
	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((uint16_t)uh->uh_ulen);

	if (ip->ip_len != len) {
		if (len > ip->ip_len) {
			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;
	save_ip.ip_len+= iphlen;         /* tcp_input subtracts this */

	/*
	 * Checksum extended UDP header and data.
	 */
	if (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;
	  if(cksum(m, len + sizeof(struct ip))) {
	    goto bad;
	  }
	}

        /*
         *  handle DHCP/BOOTP
         */
        if (ntohs(uh->uh_dport) == BOOTP_SERVER &&
            (ip->ip_dst.s_addr == slirp->vhost_addr.s_addr ||
             ip->ip_dst.s_addr == 0xffffffff)) {
                bootp_input(m);
                goto bad;
            }

        /*
         *  handle TFTP
         */
        if (ntohs(uh->uh_dport) == TFTP_SERVER &&
            ip->ip_dst.s_addr == slirp->vhost_addr.s_addr) {
            tftp_input(m);
            goto bad;
        }

        if (slirp->restricted) {
            goto bad;
        }

	/*
	 * Locate pcb for datagram.
	 */
	lhost.ss_family = AF_INET;
	lhost4 = (struct sockaddr_in *) &lhost;
	lhost4->sin_addr = ip->ip_src;
	lhost4->sin_port = uh->uh_sport;

	so = solookup(&slirp->udp_last_so, &slirp->udb, &lhost, NULL);

	if (so == NULL) {
	  /*
	   * If there's no socket for this packet,
	   * create one
	   */
	  so = socreate(slirp);
	  if (!so) {
	      goto bad;
	  }
	  if (udp_attach(so, AF_INET) == -1) {
	    DEBUG_MISC((dfd," udp_attach errno = %d-%s\n",
			errno,strerror(errno)));
	    sofree(so);
	    goto bad;
	  }

	  /*
	   * Setup fields
	   */
	  so->so_lfamily = AF_INET;
	  so->so_laddr = ip->ip_src;
	  so->so_lport = 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_ffamily = AF_INET;
        so->so_faddr = ip->ip_dst; /* XXX */
        so->so_fport = uh->uh_dport; /* XXX */

	iphlen += sizeof(struct udphdr);
	m->m_len -= iphlen;
	m->m_data += iphlen;

	/*
	 * Now we sendto() the packet.
	 */
	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,strerror(errno)));
	  icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,strerror(errno));
	  goto bad;
	}

	m_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:
	m_free(m);
}

int udp_output(struct socket *so, struct mbuf *m,
                struct sockaddr_in *saddr, struct sockaddr_in *daddr,
                int iptos)
{
	register struct udpiphdr *ui;
	int error = 0;

	DEBUG_CALL("udp_output");
	DEBUG_ARG("so = %p", so);
	DEBUG_ARG("m = %p", m);
	DEBUG_ARG("saddr = %lx", (long)saddr->sin_addr.s_addr);
	DEBUG_ARG("daddr = %lx", (long)daddr->sin_addr.s_addr);

	/*
	 * 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 = mtod(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));
	/* XXXXX Check for from-one-location sockets, or from-any-location sockets */
        ui->ui_src = saddr->sin_addr;
	ui->ui_dst = daddr->sin_addr;
	ui->ui_sport = saddr->sin_port;
	ui->ui_dport = daddr->sin_port;
	ui->ui_ulen = ui->ui_len;

	/*
	 * Stuff checksum and output datagram.
	 */
	ui->ui_sum = 0;
	if ((ui->ui_sum = cksum(m, m->m_len)) == 0)
		ui->ui_sum = 0xffff;
	((struct ip *)ui)->ip_len = m->m_len;

	((struct ip *)ui)->ip_ttl = IPDEFTTL;
	((struct ip *)ui)->ip_tos = iptos;

	error = ip_output(so, m);

	return (error);
}

int
udp_attach(struct socket *so, unsigned short af)
{
  so->s = qemu_socket(af, SOCK_DGRAM, 0);
  if (so->s != -1) {
    so->so_expire = curtime + SO_EXPIRE;
    insque(so, &so->slirp->udb);
  }
  return(so->s);
}

void
udp_detach(struct socket *so)
{
	closesocket(so->s);
	sofree(so);
}

static const struct tos_t udptos[] = {
	{0, 53, IPTOS_LOWDELAY, 0},			/* DNS */
	{0, 0, 0, 0}
};

static uint8_t
udp_tos(struct socket *so)
{
	int i = 0;

	while(udptos[i].tos) {
		if ((udptos[i].fport && ntohs(so->so_fport) == udptos[i].fport) ||
		    (udptos[i].lport && ntohs(so->so_lport) == udptos[i].lport)) {
		    	so->so_emu = udptos[i].emu;
			return udptos[i].tos;
		}
		i++;
	}

	return 0;
}

struct socket *
udp_listen(Slirp *slirp, uint32_t haddr, u_int hport, uint32_t laddr,
           u_int lport, int flags)
{
	struct sockaddr_in addr;
	struct socket *so;
	socklen_t addrlen = sizeof(struct sockaddr_in);

	so = socreate(slirp);
	if (!so) {
	    return NULL;
	}
	so->s = qemu_socket(AF_INET,SOCK_DGRAM,0);
	so->so_expire = curtime + SO_EXPIRE;
	insque(so, &slirp->udb);

	addr.sin_family = AF_INET;
	addr.sin_addr.s_addr = haddr;
	addr.sin_port = hport;

	if (bind(so->s,(struct sockaddr *)&addr, addrlen) < 0) {
		udp_detach(so);
		return NULL;
	}
	socket_set_fast_reuse(so->s);

	getsockname(so->s,(struct sockaddr *)&addr,&addrlen);
	so->fhost.sin = addr;
	sotranslate_accept(so);
	so->so_lfamily = AF_INET;
	so->so_lport = lport;
	so->so_laddr.s_addr = laddr;
	if (flags != SS_FACCEPTONCE)
	   so->so_expire = 0;

	so->so_state &= SS_PERSISTENT_MASK;
	so->so_state |= SS_ISFCONNECTED | flags;

	return so;
}
Commit	Line	Data
f0cbd3ec FB	1	/*
	2	* Copyright (c) 1982, 1986, 1988, 1990, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
2f5f8996	13	* 3. Neither the name of the University nor the names of its contributors
f0cbd3ec FB	14	* may be used to endorse or promote products derived from this software
	15	* without specific prior written permission.
	16	*
	17	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	18	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	19	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	20	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	21	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	22	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	23	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	24	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	25	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	26	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	27	* SUCH DAMAGE.
	28	*
	29	* @(#)udp_usrreq.c 8.4 (Berkeley) 1/21/94
	30	* udp_usrreq.c,v 1.4 1994/10/02 17:48:45 phk Exp
	31	*/
	32
	33	/*
	34	* Changes and additions relating to SLiRP
	35	* Copyright (c) 1995 Danny Gasparovski.
5fafdf24 TS	36	*
5fafdf24 TS	37	* Please read the file COPYRIGHT for the
f0cbd3ec FB	38	* terms and conditions of the copyright.
	39	*/
	40
7df7482b	41	#include "qemu/osdep.h"
f0cbd3ec FB	42	#include <slirp.h>
	43	#include "ip_icmp.h"
	44
b6dce92e	45	static uint8_t udp_tos(struct socket *so);
9634d903	46
f0cbd3ec	47	void
460fec67	48	udp_init(Slirp *slirp)
f0cbd3ec	49	{
460fec67 JK	50	slirp->udb.so_next = slirp->udb.so_prev = &slirp->udb;
460fec67 JK	51	slirp->udp_last_so = &slirp->udb;
f0cbd3ec	52	}
a68adc22 JK	53
	54	void udp_cleanup(Slirp *slirp)
	55	{
	56	while (slirp->udb.so_next != &slirp->udb) {
	57	udp_detach(slirp->udb.so_next);
	58	}
	59	}
	60
5fafdf24 TS	61	/* m->m_data points at ip packet header
5fafdf24 TS	62	* m->m_len length ip packet
f0cbd3ec FB	63	* ip->ip_len length data (IPDU)
	64	*/
	65	void
aeed97c4	66	udp_input(register struct mbuf *m, int iphlen)
f0cbd3ec	67	{
460fec67	68	Slirp *slirp = m->slirp;
f0cbd3ec FB	69	register struct ip *ip;
f0cbd3ec FB	70	register struct udphdr *uh;
f0cbd3ec	71	int len;
5fafdf24	72	struct ip save_ip;
f0cbd3ec	73	struct socket *so;
8a87f121 GS	74	struct sockaddr_storage lhost;
8a87f121 GS	75	struct sockaddr_in *lhost4;
5fafdf24	76
f0cbd3ec	77	DEBUG_CALL("udp_input");
ecc804ca	78	DEBUG_ARG("m = %p", m);
f0cbd3ec	79	DEBUG_ARG("iphlen = %d", iphlen);
5fafdf24	80
f0cbd3ec FB	81	/*
	82	* Strip IP options, if any; should skip this,
	83	* make available to user, and use on returned packets,
	84	* but we don't yet have a way to check the checksum
	85	* with options still present.
	86	*/
	87	if(iphlen > sizeof(struct ip)) {
	88	ip_stripoptions(m, (struct mbuf *)0);
	89	iphlen = sizeof(struct ip);
	90	}
	91
	92	/*
	93	* Get IP and UDP header together in first mbuf.
	94	*/
	95	ip = mtod(m, struct ip *);
	96	uh = (struct udphdr *)((caddr_t)ip + iphlen);
	97
	98	/*
	99	* Make mbuf data length reflect UDP length.
	100	* If not enough data to reflect UDP length, drop.
	101	*/
b6dce92e	102	len = ntohs((uint16_t)uh->uh_ulen);
f0cbd3ec FB	103
	104	if (ip->ip_len != len) {
	105	if (len > ip->ip_len) {
f0cbd3ec FB	106	goto bad;
	107	}
	108	m_adj(m, len - ip->ip_len);
	109	ip->ip_len = len;
	110	}
5fafdf24	111
f0cbd3ec FB	112	/*
	113	* Save a copy of the IP header in case we want restore it
	114	* for sending an ICMP error message in response.
	115	*/
5fafdf24	116	save_ip = *ip;
f0cbd3ec FB	117	save_ip.ip_len+= iphlen; /* tcp_input subtracts this */
	118
	119	/*
	120	* Checksum extended UDP header and data.
	121	*/
0d62c4cf	122	if (uh->uh_sum) {
429d0a3d	123	memset(&((struct ipovly *)ip)->ih_mbuf, 0, sizeof(struct mbuf_ptr));
f0cbd3ec FB	124	((struct ipovly *)ip)->ih_x1 = 0;
f0cbd3ec FB	125	((struct ipovly *)ip)->ih_len = uh->uh_ulen;
f0cbd3ec	126	if(cksum(m, len + sizeof(struct ip))) {
f0cbd3ec FB	127	goto bad;
	128	}
	129	}
	130
	131	/*
	132	* handle DHCP/BOOTP
	133	*/
5a82362a JK	134	if (ntohs(uh->uh_dport) == BOOTP_SERVER &&
	135	(ip->ip_dst.s_addr == slirp->vhost_addr.s_addr \|\|
	136	ip->ip_dst.s_addr == 0xffffffff)) {
	137	bootp_input(m);
	138	goto bad;
	139	}
f0cbd3ec	140
c7f74643 FB	141	/*
	142	* handle TFTP
	143	*/
5a82362a JK	144	if (ntohs(uh->uh_dport) == TFTP_SERVER &&
5a82362a JK	145	ip->ip_dst.s_addr == slirp->vhost_addr.s_addr) {
c7f74643 FB	146	tftp_input(m);
	147	goto bad;
	148	}
	149
12b513d8 JK	150	if (slirp->restricted) {
	151	goto bad;
	152	}
	153
f0cbd3ec FB	154	/*
	155	* Locate pcb for datagram.
	156	*/
8a87f121 GS	157	lhost.ss_family = AF_INET;
	158	lhost4 = (struct sockaddr_in *) &lhost;
	159	lhost4->sin_addr = ip->ip_src;
	160	lhost4->sin_port = uh->uh_sport;
	161
	162	so = solookup(&slirp->udp_last_so, &slirp->udb, &lhost, NULL);
5fafdf24	163
f0cbd3ec FB	164	if (so == NULL) {
	165	/*
	166	* If there's no socket for this packet,
	167	* create one
	168	*/
460fec67 JK	169	so = socreate(slirp);
	170	if (!so) {
	171	goto bad;
	172	}
9b5a30dc	173	if (udp_attach(so, AF_INET) == -1) {
5fafdf24	174	DEBUG_MISC((dfd," udp_attach errno = %d-%s\n",
f0cbd3ec FB	175	errno,strerror(errno)));
	176	sofree(so);
	177	goto bad;
	178	}
3b46e624	179
f0cbd3ec FB	180	/*
	181	* Setup fields
	182	*/
eae303ff	183	so->so_lfamily = AF_INET;
f0cbd3ec FB	184	so->so_laddr = ip->ip_src;
f0cbd3ec FB	185	so->so_lport = uh->uh_sport;
3b46e624	186
f0cbd3ec FB	187	if ((so->so_iptos = udp_tos(so)) == 0)
f0cbd3ec FB	188	so->so_iptos = ip->ip_tos;
3b46e624	189
f0cbd3ec FB	190	/*
	191	* XXXXX Here, check if it's in udpexec_list,
	192	* and if it is, do the fork_exec() etc.
	193	*/
	194	}
	195
eae303ff	196	so->so_ffamily = AF_INET;
54fd9cdf TS	197	so->so_faddr = ip->ip_dst; /* XXX */
	198	so->so_fport = uh->uh_dport; /* XXX */
	199
f0cbd3ec FB	200	iphlen += sizeof(struct udphdr);
	201	m->m_len -= iphlen;
	202	m->m_data += iphlen;
	203
	204	/*
	205	* Now we sendto() the packet.
	206	*/
f0cbd3ec FB	207	if(sosendto(so,m) == -1) {
	208	m->m_len += iphlen;
	209	m->m_data -= iphlen;
	210	*ip=save_ip;
	211	DEBUG_MISC((dfd,"udp tx errno = %d-%s\n",errno,strerror(errno)));
3b46e624	212	icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,strerror(errno));
86c9e1e9	213	goto bad;
f0cbd3ec FB	214	}
	215
	216	m_free(so->so_m); /* used for ICMP if error on sorecvfrom */
	217
	218	/* restore the orig mbuf packet */
	219	m->m_len += iphlen;
	220	m->m_data -= iphlen;
	221	*ip=save_ip;
	222	so->so_m=m; /* ICMP backup */
	223
	224	return;
	225	bad:
3acccfc6	226	m_free(m);
f0cbd3ec FB	227	}
f0cbd3ec FB	228
5379229a	229	int udp_output(struct socket so, struct mbuf m,
f0cbd3ec FB	230	struct sockaddr_in saddr, struct sockaddr_in daddr,
	231	int iptos)
	232	{
	233	register struct udpiphdr *ui;
	234	int error = 0;
	235
	236	DEBUG_CALL("udp_output");
ecc804ca SW	237	DEBUG_ARG("so = %p", so);
ecc804ca SW	238	DEBUG_ARG("m = %p", m);
f0cbd3ec FB	239	DEBUG_ARG("saddr = %lx", (long)saddr->sin_addr.s_addr);
	240	DEBUG_ARG("daddr = %lx", (long)daddr->sin_addr.s_addr);
	241
	242	/*
	243	* Adjust for header
	244	*/
	245	m->m_data -= sizeof(struct udpiphdr);
	246	m->m_len += sizeof(struct udpiphdr);
5fafdf24	247
f0cbd3ec FB	248	/*
	249	* Fill in mbuf with extended UDP header
	250	* and addresses and length put into network format.
	251	*/
	252	ui = mtod(m, struct udpiphdr *);
429d0a3d	253	memset(&ui->ui_i.ih_mbuf, 0 , sizeof(struct mbuf_ptr));
f0cbd3ec FB	254	ui->ui_x1 = 0;
f0cbd3ec FB	255	ui->ui_pr = IPPROTO_UDP;
0d62c4cf	256	ui->ui_len = htons(m->m_len - sizeof(struct ip));
f0cbd3ec FB	257	/* XXXXX Check for from-one-location sockets, or from-any-location sockets */
	258	ui->ui_src = saddr->sin_addr;
	259	ui->ui_dst = daddr->sin_addr;
	260	ui->ui_sport = saddr->sin_port;
	261	ui->ui_dport = daddr->sin_port;
	262	ui->ui_ulen = ui->ui_len;
	263
	264	/*
	265	* Stuff checksum and output datagram.
	266	*/
	267	ui->ui_sum = 0;
0d62c4cf	268	if ((ui->ui_sum = cksum(m, m->m_len)) == 0)
f0cbd3ec	269	ui->ui_sum = 0xffff;
f0cbd3ec FB	270	((struct ip *)ui)->ip_len = m->m_len;
f0cbd3ec FB	271
9634d903	272	((struct ip *)ui)->ip_ttl = IPDEFTTL;
f0cbd3ec	273	((struct ip *)ui)->ip_tos = iptos;
5fafdf24	274
f0cbd3ec	275	error = ip_output(so, m);
5fafdf24	276
f0cbd3ec FB	277	return (error);
	278	}
	279
f0cbd3ec	280	int
9b5a30dc	281	udp_attach(struct socket *so, unsigned short af)
f0cbd3ec	282	{
9b5a30dc GS	283	so->s = qemu_socket(af, SOCK_DGRAM, 0);
9b5a30dc GS	284	if (so->s != -1) {
97df1ee5 ES	285	so->so_expire = curtime + SO_EXPIRE;
97df1ee5 ES	286	insque(so, &so->slirp->udb);
f0cbd3ec FB	287	}
	288	return(so->s);
	289	}
	290
	291	void
aeed97c4	292	udp_detach(struct socket *so)
f0cbd3ec	293	{
379ff53d	294	closesocket(so->s);
f0cbd3ec FB	295	sofree(so);
	296	}
	297
9634d903	298	static const struct tos_t udptos[] = {
f0cbd3ec	299	{0, 53, IPTOS_LOWDELAY, 0}, /* DNS */
f0cbd3ec FB	300	{0, 0, 0, 0}
	301	};
	302
b6dce92e	303	static uint8_t
9634d903	304	udp_tos(struct socket *so)
f0cbd3ec FB	305	{
f0cbd3ec FB	306	int i = 0;
5fafdf24	307
f0cbd3ec FB	308	while(udptos[i].tos) {
	309	if ((udptos[i].fport && ntohs(so->so_fport) == udptos[i].fport) \|\|
	310	(udptos[i].lport && ntohs(so->so_lport) == udptos[i].lport)) {
	311	so->so_emu = udptos[i].emu;
	312	return udptos[i].tos;
	313	}
	314	i++;
	315	}
5fafdf24	316
f0cbd3ec FB	317	return 0;
	318	}
	319
f0cbd3ec	320	struct socket *
b6dce92e	321	udp_listen(Slirp *slirp, uint32_t haddr, u_int hport, uint32_t laddr,
460fec67	322	u_int lport, int flags)
f0cbd3ec FB	323	{
	324	struct sockaddr_in addr;
	325	struct socket *so;
aad1239a	326	socklen_t addrlen = sizeof(struct sockaddr_in);
5fafdf24	327
460fec67 JK	328	so = socreate(slirp);
	329	if (!so) {
	330	return NULL;
f0cbd3ec	331	}
40ff6d7e	332	so->s = qemu_socket(AF_INET,SOCK_DGRAM,0);
f0cbd3ec	333	so->so_expire = curtime + SO_EXPIRE;
460fec67	334	insque(so, &slirp->udb);
f0cbd3ec FB	335
f0cbd3ec FB	336	addr.sin_family = AF_INET;
3c6a0580 JK	337	addr.sin_addr.s_addr = haddr;
3c6a0580 JK	338	addr.sin_port = hport;
f0cbd3ec FB	339
	340	if (bind(so->s,(struct sockaddr *)&addr, addrlen) < 0) {
	341	udp_detach(so);
	342	return NULL;
	343	}
aad1239a	344	socket_set_fast_reuse(so->s);
5fafdf24	345
f0cbd3ec	346	getsockname(so->s,(struct sockaddr *)&addr,&addrlen);
5379229a GS	347	so->fhost.sin = addr;
5379229a GS	348	sotranslate_accept(so);
eae303ff	349	so->so_lfamily = AF_INET;
f0cbd3ec FB	350	so->so_lport = lport;
	351	so->so_laddr.s_addr = laddr;
	352	if (flags != SS_FACCEPTONCE)
	353	so->so_expire = 0;
5fafdf24	354
f932b6ce	355	so->so_state &= SS_PERSISTENT_MASK;
6dd5ffb6	356	so->so_state \|= SS_ISFCONNECTED \| flags;
5fafdf24	357
f0cbd3ec FB	358	return so;
f0cbd3ec FB	359	}