qapi: Add missing JSON files in build dependencies
[qemu/armbru.git] / slirp / udp.c
blob6b39cab0c65cd45dcad5a4eb8ef15dce1dfece25
1 /*
2 * Copyright (c) 1982, 1986, 1988, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
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.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
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.
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
34 * Changes and additions relating to SLiRP
35 * Copyright (c) 1995 Danny Gasparovski.
37 * Please read the file COPYRIGHT for the
38 * terms and conditions of the copyright.
41 #include "qemu/osdep.h"
42 #include <slirp.h>
43 #include "ip_icmp.h"
45 static uint8_t udp_tos(struct socket *so);
47 void
48 udp_init(Slirp *slirp)
50 slirp->udb.so_next = slirp->udb.so_prev = &slirp->udb;
51 slirp->udp_last_so = &slirp->udb;
54 void udp_cleanup(Slirp *slirp)
56 while (slirp->udb.so_next != &slirp->udb) {
57 udp_detach(slirp->udb.so_next);
61 /* m->m_data points at ip packet header
62 * m->m_len length ip packet
63 * ip->ip_len length data (IPDU)
65 void
66 udp_input(register struct mbuf *m, int iphlen)
68 Slirp *slirp = m->slirp;
69 register struct ip *ip;
70 register struct udphdr *uh;
71 int len;
72 struct ip save_ip;
73 struct socket *so;
74 struct sockaddr_storage lhost;
75 struct sockaddr_in *lhost4;
77 DEBUG_CALL("udp_input");
78 DEBUG_ARG("m = %p", m);
79 DEBUG_ARG("iphlen = %d", iphlen);
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.
87 if(iphlen > sizeof(struct ip)) {
88 ip_stripoptions(m, (struct mbuf *)0);
89 iphlen = sizeof(struct ip);
93 * Get IP and UDP header together in first mbuf.
95 ip = mtod(m, struct ip *);
96 uh = (struct udphdr *)((caddr_t)ip + iphlen);
99 * Make mbuf data length reflect UDP length.
100 * If not enough data to reflect UDP length, drop.
102 len = ntohs((uint16_t)uh->uh_ulen);
104 if (ip->ip_len != len) {
105 if (len > ip->ip_len) {
106 goto bad;
108 m_adj(m, len - ip->ip_len);
109 ip->ip_len = len;
113 * Save a copy of the IP header in case we want restore it
114 * for sending an ICMP error message in response.
116 save_ip = *ip;
117 save_ip.ip_len+= iphlen; /* tcp_input subtracts this */
120 * Checksum extended UDP header and data.
122 if (uh->uh_sum) {
123 memset(&((struct ipovly *)ip)->ih_mbuf, 0, sizeof(struct mbuf_ptr));
124 ((struct ipovly *)ip)->ih_x1 = 0;
125 ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
126 if(cksum(m, len + sizeof(struct ip))) {
127 goto bad;
132 * handle DHCP/BOOTP
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;
142 * handle TFTP
144 if (ntohs(uh->uh_dport) == TFTP_SERVER &&
145 ip->ip_dst.s_addr == slirp->vhost_addr.s_addr) {
146 tftp_input(m);
147 goto bad;
150 if (slirp->restricted) {
151 goto bad;
155 * Locate pcb for datagram.
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;
162 so = solookup(&slirp->udp_last_so, &slirp->udb, &lhost, NULL);
164 if (so == NULL) {
166 * If there's no socket for this packet,
167 * create one
169 so = socreate(slirp);
170 if (!so) {
171 goto bad;
173 if (udp_attach(so, AF_INET) == -1) {
174 DEBUG_MISC((dfd," udp_attach errno = %d-%s\n",
175 errno,strerror(errno)));
176 sofree(so);
177 goto bad;
181 * Setup fields
183 so->so_lfamily = AF_INET;
184 so->so_laddr = ip->ip_src;
185 so->so_lport = uh->uh_sport;
187 if ((so->so_iptos = udp_tos(so)) == 0)
188 so->so_iptos = ip->ip_tos;
191 * XXXXX Here, check if it's in udpexec_list,
192 * and if it is, do the fork_exec() etc.
196 so->so_ffamily = AF_INET;
197 so->so_faddr = ip->ip_dst; /* XXX */
198 so->so_fport = uh->uh_dport; /* XXX */
200 iphlen += sizeof(struct udphdr);
201 m->m_len -= iphlen;
202 m->m_data += iphlen;
205 * Now we sendto() the packet.
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)));
212 icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,strerror(errno));
213 goto bad;
216 m_free(so->so_m); /* used for ICMP if error on sorecvfrom */
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 */
224 return;
225 bad:
226 m_free(m);
229 int udp_output(struct socket *so, struct mbuf *m,
230 struct sockaddr_in *saddr, struct sockaddr_in *daddr,
231 int iptos)
233 register struct udpiphdr *ui;
234 int error = 0;
236 DEBUG_CALL("udp_output");
237 DEBUG_ARG("so = %p", so);
238 DEBUG_ARG("m = %p", m);
239 DEBUG_ARG("saddr = %lx", (long)saddr->sin_addr.s_addr);
240 DEBUG_ARG("daddr = %lx", (long)daddr->sin_addr.s_addr);
243 * Adjust for header
245 m->m_data -= sizeof(struct udpiphdr);
246 m->m_len += sizeof(struct udpiphdr);
249 * Fill in mbuf with extended UDP header
250 * and addresses and length put into network format.
252 ui = mtod(m, struct udpiphdr *);
253 memset(&ui->ui_i.ih_mbuf, 0 , sizeof(struct mbuf_ptr));
254 ui->ui_x1 = 0;
255 ui->ui_pr = IPPROTO_UDP;
256 ui->ui_len = htons(m->m_len - sizeof(struct ip));
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;
265 * Stuff checksum and output datagram.
267 ui->ui_sum = 0;
268 if ((ui->ui_sum = cksum(m, m->m_len)) == 0)
269 ui->ui_sum = 0xffff;
270 ((struct ip *)ui)->ip_len = m->m_len;
272 ((struct ip *)ui)->ip_ttl = IPDEFTTL;
273 ((struct ip *)ui)->ip_tos = iptos;
275 error = ip_output(so, m);
277 return (error);
281 udp_attach(struct socket *so, unsigned short af)
283 so->s = qemu_socket(af, SOCK_DGRAM, 0);
284 if (so->s != -1) {
285 so->so_expire = curtime + SO_EXPIRE;
286 insque(so, &so->slirp->udb);
288 return(so->s);
291 void
292 udp_detach(struct socket *so)
294 closesocket(so->s);
295 sofree(so);
298 static const struct tos_t udptos[] = {
299 {0, 53, IPTOS_LOWDELAY, 0}, /* DNS */
300 {0, 0, 0, 0}
303 static uint8_t
304 udp_tos(struct socket *so)
306 int i = 0;
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;
314 i++;
317 return 0;
320 struct socket *
321 udp_listen(Slirp *slirp, uint32_t haddr, u_int hport, uint32_t laddr,
322 u_int lport, int flags)
324 struct sockaddr_in addr;
325 struct socket *so;
326 socklen_t addrlen = sizeof(struct sockaddr_in);
328 so = socreate(slirp);
329 if (!so) {
330 return NULL;
332 so->s = qemu_socket(AF_INET,SOCK_DGRAM,0);
333 so->so_expire = curtime + SO_EXPIRE;
334 insque(so, &slirp->udb);
336 addr.sin_family = AF_INET;
337 addr.sin_addr.s_addr = haddr;
338 addr.sin_port = hport;
340 if (bind(so->s,(struct sockaddr *)&addr, addrlen) < 0) {
341 udp_detach(so);
342 return NULL;
344 socket_set_fast_reuse(so->s);
346 getsockname(so->s,(struct sockaddr *)&addr,&addrlen);
347 so->fhost.sin = addr;
348 sotranslate_accept(so);
349 so->so_lfamily = AF_INET;
350 so->so_lport = lport;
351 so->so_laddr.s_addr = laddr;
352 if (flags != SS_FACCEPTONCE)
353 so->so_expire = 0;
355 so->so_state &= SS_PERSISTENT_MASK;
356 so->so_state |= SS_ISFCONNECTED | flags;
358 return so;