* 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
+ * 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.
*
/*
* Changes and additions relating to SLiRP
* Copyright (c) 1995 Danny Gasparovski.
- *
- * Please read the file COPYRIGHT for the
+ *
+ * Please read the file COPYRIGHT for the
* terms and conditions of the copyright.
*/
#include <slirp.h>
#include "ip_icmp.h"
+#ifdef LOG_ENABLED
struct udpstat udpstat;
+#endif
struct socket udb;
+static u_int8_t udp_tos(struct socket *so);
+static void udp_emu(struct socket *so, struct mbuf *m);
+
/*
* UDP protocol implementation.
* Per RFC 768, August, 1980.
*/
#ifndef COMPAT_42
-int udpcksum = 1;
+#define UDPCKSUM 1
#else
-int udpcksum = 0; /* XXX */
+#define UDPCKSUM 0 /* XXX */
#endif
struct socket *udp_last_so = &udb;
void
-udp_init()
+udp_init(void)
{
udb.so_next = udb.so_prev = &udb;
}
-/* m->m_data points at ip packet header
- * m->m_len length ip packet
+/* 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 struct mbuf *m;
- int iphlen;
+udp_input(register struct mbuf *m, int iphlen)
{
register struct ip *ip;
register struct udphdr *uh;
/* struct mbuf *opts = 0;*/
int len;
- struct ip save_ip;
+ 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++;
+
+ STAT(udpstat.udps_ipackets++);
/*
* Strip IP options, if any; should skip this,
if (ip->ip_len != len) {
if (len > ip->ip_len) {
- udpstat.udps_badlen++;
+ STAT(udpstat.udps_badlen++);
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;
save_ip.ip_len+= iphlen; /* tcp_input subtracts this */
/*
* Checksum extended UDP header and data.
*/
- if (udpcksum && uh->uh_sum) {
- ((struct ipovly *)ip)->ih_next = 0;
- ((struct ipovly *)ip)->ih_prev = 0;
+ 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) {
+ * uh->uh_sum = cksum(m, len + sizeof (struct ip));
+ * if (uh->uh_sum) {
*/
if(cksum(m, len + sizeof(struct ip))) {
- udpstat.udps_badsum++;
+ STAT(udpstat.udps_badsum++);
goto bad;
}
}
goto bad;
}
+ if (slirp_restrict)
+ goto bad;
+
/*
* handle TFTP
*/
if (so->so_lport != uh->uh_sport ||
so->so_laddr.s_addr != ip->ip_src.s_addr) {
struct socket *tmp;
-
+
for (tmp = udb.so_next; tmp != &udb; tmp = tmp->so_next) {
if (tmp->so_lport == uh->uh_sport &&
tmp->so_laddr.s_addr == ip->ip_src.s_addr) {
if (tmp == &udb) {
so = NULL;
} else {
- udpstat.udpps_pcbcachemiss++;
+ STAT(udpstat.udpps_pcbcachemiss++);
udp_last_so = so;
}
}
-
+
if (so == NULL) {
/*
* If there's no socket for this packet,
*/
if ((so = socreate()) == NULL) goto bad;
if(udp_attach(so) == -1) {
- DEBUG_MISC((dfd," udp_attach errno = %d-%s\n",
+ DEBUG_MISC((dfd," udp_attach errno = %d-%s\n",
errno,strerror(errno)));
sofree(so);
goto bad;
}
-
+
/*
* Setup fields
*/
/* udp_last_so = so; */
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.
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));
+ icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,strerror(errno));
}
m_free(so->so_m); /* used for ICMP if error on sorecvfrom */
return;
}
-int udp_output2(struct socket *so, struct mbuf *m,
+int udp_output2(struct socket *so, struct mbuf *m,
struct sockaddr_in *saddr, struct sockaddr_in *daddr,
int iptos)
{
*/
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 *);
- ui->ui_next = ui->ui_prev = 0;
+ 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)); */
* Stuff checksum and output datagram.
*/
ui->ui_sum = 0;
- if (udpcksum) {
+ 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_ttl = IPDEFTTL;
((struct ip *)ui)->ip_tos = iptos;
-
- udpstat.udps_opackets++;
-
+
+ STAT(udpstat.udps_opackets++);
+
error = ip_output(so, m);
-
+
return (error);
}
-int udp_output(struct socket *so, struct mbuf *m,
+int udp_output(struct socket *so, struct mbuf *m,
struct sockaddr_in *addr)
{
saddr = *addr;
if ((so->so_faddr.s_addr & htonl(0xffffff00)) == special_addr.s_addr) {
- saddr.sin_addr.s_addr = so->so_faddr.s_addr;
if ((so->so_faddr.s_addr & htonl(0x000000ff)) == htonl(0xff))
saddr.sin_addr.s_addr = alias_addr.s_addr;
+ else if (addr->sin_addr.s_addr == loopback_addr.s_addr ||
+ (ntohl(so->so_faddr.s_addr) & 0xff) != CTL_ALIAS)
+ saddr.sin_addr.s_addr = so->so_faddr.s_addr;
}
daddr.sin_addr = so->so_laddr;
daddr.sin_port = so->so_lport;
-
+
return udp_output2(so, m, &saddr, &daddr, so->so_iptos);
}
int
-udp_attach(so)
- struct socket *so;
+udp_attach(struct socket *so)
{
struct sockaddr_in addr;
-
+
if((so->s = socket(AF_INET,SOCK_DGRAM,0)) != -1) {
/*
* Here, we bind() the socket. Although not really needed
}
void
-udp_detach(so)
- struct socket *so;
+udp_detach(struct socket *so)
{
closesocket(so->s);
/* if (so->so_m) m_free(so->so_m); done by sofree */
sofree(so);
}
-struct tos_t udptos[] = {
+static const 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, 0, 0, 0}
};
-u_int8_t
-udp_tos(so)
- struct socket *so;
+static u_int8_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)) {
}
i++;
}
-
+
return 0;
}
/*
* Here, talk/ytalk/ntalk requests must be emulated
*/
-void
-udp_emu(so, m)
- struct socket *so;
- struct mbuf *m;
+static void
+udp_emu(struct socket *so, struct mbuf *m)
{
struct sockaddr_in addr;
- int addrlen = sizeof(addr);
+ socklen_t addrlen = sizeof(addr);
#ifdef EMULATE_TALK
CTL_MSG_OLD *omsg;
CTL_MSG *nmsg;
char buff[sizeof(CTL_MSG)];
u_char type;
-
+
struct talk_request {
struct talk_request *next;
struct socket *udp_so;
struct socket *tcp_so;
} *req;
-
- static struct talk_request *req_tbl = 0;
-
+
+ static struct talk_request *req_tbl = 0;
+
#endif
-
+
struct cu_header {
uint16_t d_family; // destination family
uint16_t d_port; // destination port
*/
if (getsockname(so->s, (struct sockaddr *)&addr, &addrlen) < 0)
return;
-
+
#define IS_OLD (so->so_emu == EMU_TALK)
#define COPY_MSG(dest, src) { dest->type = src->type; \
type = omsg->type;
OTOSIN(omsg, ctl_addr)->sin_port = addr.sin_port;
OTOSIN(omsg, ctl_addr)->sin_addr = our_addr;
- strncpy(omsg->l_name, getlogin(), NAME_SIZE_OLD);
- } else { /* new talk */
+ pstrcpy(omsg->l_name, NAME_SIZE_OLD, getlogin());
+ } else { /* new talk */
omsg = (CTL_MSG_OLD *) buff;
nmsg = mtod(m, CTL_MSG *);
type = nmsg->type;
OTOSIN(nmsg, ctl_addr)->sin_port = addr.sin_port;
OTOSIN(nmsg, ctl_addr)->sin_addr = our_addr;
- strncpy(nmsg->l_name, getlogin(), NAME_SIZE_OLD);
+ pstrcpy(nmsg->l_name, NAME_SIZE_OLD, getlogin());
}
-
- if (type == LOOK_UP)
+
+ if (type == LOOK_UP)
return; /* for LOOK_UP this is enough */
-
+
if (IS_OLD) { /* make a copy of the message */
COPY_MSG(nmsg, omsg);
nmsg->vers = 1;
* ports, 517 and 518. This is why we have two copies
* of the message, one in old talk and one in new talk
* format.
- */
+ */
if (type == ANNOUNCE) {
int s;
u_short temp_port;
-
+
for(req = req_tbl; req; req = req->next)
if (so == req->udp_so)
break; /* found it */
-
+
if (!req) { /* no entry for so, create new */
req = (struct talk_request *)
malloc(sizeof(struct talk_request));
req->udp_so = so;
- req->tcp_so = solisten(0,
- OTOSIN(omsg, addr)->sin_addr.s_addr,
+ req->tcp_so = solisten(0,
+ OTOSIN(omsg, addr)->sin_addr.s_addr,
OTOSIN(omsg, addr)->sin_port,
SS_FACCEPTONCE);
req->next = req_tbl;
req_tbl = req;
- }
-
+ }
+
/* replace port number in addr field */
addrlen = sizeof(addr);
- getsockname(req->tcp_so->s,
+ getsockname(req->tcp_so->s,
(struct sockaddr *) &addr,
- &addrlen);
+ &addrlen);
OTOSIN(omsg, addr)->sin_port = addr.sin_port;
OTOSIN(omsg, addr)->sin_addr = our_addr;
OTOSIN(nmsg, addr)->sin_port = addr.sin_port;
- OTOSIN(nmsg, addr)->sin_addr = our_addr;
-
+ OTOSIN(nmsg, addr)->sin_addr = our_addr;
+
/* send LEAVE_INVITEs */
temp_port = OTOSIN(omsg, ctl_addr)->sin_port;
OTOSIN(omsg, ctl_addr)->sin_port = 0;
OTOSIN(nmsg, ctl_addr)->sin_port = 0;
- omsg->type = nmsg->type = LEAVE_INVITE;
-
+ omsg->type = nmsg->type = LEAVE_INVITE;
+
s = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
addr.sin_addr = our_addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(517);
- sendto(s, (char *)omsg, sizeof(*omsg), 0,
+ sendto(s, (char *)omsg, sizeof(*omsg), 0,
(struct sockaddr *)&addr, sizeof(addr));
addr.sin_port = htons(518);
sendto(s, (char *)nmsg, sizeof(*nmsg), 0,
(struct sockaddr *) &addr, sizeof(addr));
closesocket(s) ;
- omsg->type = nmsg->type = ANNOUNCE;
+ omsg->type = nmsg->type = ANNOUNCE;
OTOSIN(omsg, ctl_addr)->sin_port = temp_port;
OTOSIN(nmsg, ctl_addr)->sin_port = temp_port;
}
-
- /*
+
+ /*
* If it is a DELETE message, we send a copy to the
* local daemons. Then we delete the entry corresponding
* to our socket from the request table.
*/
-
+
if (type == DELETE) {
struct talk_request *temp_req, *req_next;
int s;
u_short temp_port;
-
+
temp_port = OTOSIN(omsg, ctl_addr)->sin_port;
OTOSIN(omsg, ctl_addr)->sin_port = 0;
OTOSIN(nmsg, ctl_addr)->sin_port = 0;
-
+
s = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
addr.sin_addr = our_addr;
addr.sin_family = AF_INET;
sendto(s, (char *)nmsg, sizeof(*nmsg), 0,
(struct sockaddr *)&addr, sizeof(addr));
closesocket(s);
-
+
OTOSIN(omsg, ctl_addr)->sin_port = temp_port;
OTOSIN(nmsg, ctl_addr)->sin_port = temp_port;
}
}
}
-
- return;
+
+ return;
#endif
-
+
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 (getsockname(so->s, (struct sockaddr *)&addr, &addrlen) < 0)
return;
cu_head->s_port = addr.sin_port;
cu_head->so_addr = our_addr.s_addr;
}
-
+
return;
}
}
struct socket *
-udp_listen(port, laddr, lport, flags)
- u_int port;
- u_int32_t laddr;
- u_int lport;
- int flags;
+udp_listen(u_int port, u_int32_t laddr, u_int lport, int flags)
{
struct sockaddr_in addr;
struct socket *so;
- int addrlen = sizeof(struct sockaddr_in), opt = 1;
-
+ socklen_t addrlen = sizeof(struct sockaddr_in), opt = 1;
+
if ((so = socreate()) == NULL) {
free(so);
return NULL;
}
setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int));
/* setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int)); */
-
+
getsockname(so->s,(struct sockaddr *)&addr,&addrlen);
so->so_fport = addr.sin_port;
if (addr.sin_addr.s_addr == 0 || addr.sin_addr.s_addr == loopback_addr.s_addr)
so->so_faddr = alias_addr;
else
so->so_faddr = addr.sin_addr;
-
+
so->so_lport = lport;
so->so_laddr.s_addr = laddr;
if (flags != SS_FACCEPTONCE)
so->so_expire = 0;
-
+
so->so_state = SS_ISFCONNECTED;
-
+
return so;
}
projects / qemu / blobdiff