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[unix-history]
/
usr
/
src
/
sys
/
netinet
/
ip_output.c
diff --git
a/usr/src/sys/netinet/ip_output.c
b/usr/src/sys/netinet/ip_output.c
index
ab2763a
..
5b759ce
100644
(file)
--- a/
usr/src/sys/netinet/ip_output.c
+++ b/
usr/src/sys/netinet/ip_output.c
@@
-1,99
+1,136
@@
-/* ip_output.c 1.
27 82/03/28
*/
+/* ip_output.c 1.
49 83/05/27
*/
#include "../h/param.h"
#include "../h/mbuf.h"
#include "../h/param.h"
#include "../h/mbuf.h"
-#include "../h/
mtpr
.h"
+#include "../h/
errno
.h"
#include "../h/socket.h"
#include "../h/socketvar.h"
#include "../h/socket.h"
#include "../h/socketvar.h"
-#include "../net/in.h"
-#include "../net/in_systm.h"
+
#include "../net/if.h"
#include "../net/if.h"
-#include "../net/ip.h"
-#include "../net/ip_var.h"
#include "../net/route.h"
#include "../net/route.h"
-ip_output(m, opt, ro, allowbroadcast)
+#include "../netinet/in.h"
+#include "../netinet/in_systm.h"
+#include "../netinet/ip.h"
+#include "../netinet/ip_var.h"
+
+#ifdef vax
+#include "../vax/mtpr.h"
+#endif
+
+ip_output(m, opt, ro, flags)
struct mbuf *m;
struct mbuf *opt;
struct route *ro;
struct mbuf *m;
struct mbuf *opt;
struct route *ro;
- int
allowbroadcast
;
+ int
flags
;
{
register struct ip *ip = mtod(m, struct ip *);
register struct ifnet *ifp;
{
register struct ip *ip = mtod(m, struct ip *);
register struct ifnet *ifp;
- int len, hlen = sizeof (struct ip), off;
- struct sockaddr_in tempaddr; /* temp kludge */
+ int len, hlen = sizeof (struct ip), off, error = 0;
struct route iproute;
struct route iproute;
+ struct sockaddr *dst;
-COUNT(IP_OUTPUT);
if (opt) /* XXX */
(void) m_free(opt); /* XXX */
/*
* Fill in IP header.
*/
if (opt) /* XXX */
(void) m_free(opt); /* XXX */
/*
* Fill in IP header.
*/
- ip->ip_v = IPVERSION;
ip->ip_hl = hlen >> 2;
ip->ip_hl = hlen >> 2;
- ip->ip_off &= IP_DF;
- ip->ip_id = htons(ip_id++);
+ if ((flags & IP_FORWARDING) == 0) {
+ ip->ip_v = IPVERSION;
+ ip->ip_off &= IP_DF;
+ ip->ip_id = htons(ip_id++);
+ }
-#ifdef notdef
/*
/*
- *
Find interface for this
packet.
+ *
Route
packet.
*/
if (ro == 0) {
ro = &iproute;
bzero((caddr_t)ro, sizeof (*ro));
}
*/
if (ro == 0) {
ro = &iproute;
bzero((caddr_t)ro, sizeof (*ro));
}
+ dst = &ro->ro_dst;
if (ro->ro_rt == 0) {
if (ro->ro_rt == 0) {
- ro->ro_dest.sin_addr = ip->ip_dst;
- ro->ro_dest.sin_family = AF_INET;
- route(ro);
+ ro->ro_dst.sa_family = AF_INET;
+ ((struct sockaddr_in *)&ro->ro_dst)->sin_addr = ip->ip_dst;
+ /*
+ * If routing to interface only,
+ * short circuit routing lookup.
+ */
+ if (flags & IP_ROUTETOIF) {
+ ifp = if_ifonnetof(in_netof(ip->ip_dst));
+ if (ifp == 0) {
+ error = ENETUNREACH;
+ goto bad;
+ }
+ goto gotif;
+ }
+ rtalloc(ro);
}
}
- if (ro->ro_rt == 0 || (ifp = ro->ro_rt->rt_ifp) == 0)
+ if (ro->ro_rt == 0 || (ifp = ro->ro_rt->rt_ifp) == 0) {
+ error = ENETUNREACH;
goto bad;
goto bad;
-#else
- /* interim kludge before routing fallout */
- ifp = if_ifonnetof(ip->ip_dst.s_net);
- if (ifp == 0)
- goto bad;
- tempaddr.sin_family = AF_INET;
- tempaddr.sin_addr = ip->ip_dst;
+ }
+ ro->ro_rt->rt_use++;
+ if (ro->ro_rt->rt_flags & RTF_GATEWAY)
+ dst = &ro->ro_rt->rt_gateway;
+gotif:
+#ifndef notdef
+ /*
+ * If source address not specified yet, use address
+ * of outgoing interface.
+ */
+ if (in_lnaof(ip->ip_src) == INADDR_ANY)
+ ip->ip_src.s_addr =
+ ((struct sockaddr_in *)&ifp->if_addr)->sin_addr.s_addr;
#endif
#endif
- if (!allowbroadcast && (ifp->if_flags & IFF_BROADCAST)) {
- struct sockaddr_in *sin;
-
- sin = (struct sockaddr_in *)&ifp->if_broadaddr;
- if (sin->sin_addr.s_addr == ip->ip_dst.s_addr)
+ /*
+ * Look for broadcast address and
+ * and verify user is allowed to send
+ * such a packet.
+ */
+ if (in_lnaof(((struct sockaddr_in *)dst)->sin_addr) == INADDR_ANY) {
+ if ((ifp->if_flags & IFF_BROADCAST) == 0) {
+ error = EADDRNOTAVAIL;
+ goto bad;
+ }
+ if ((flags & IP_ALLOWBROADCAST) == 0) {
+ error = EACCES;
goto bad;
goto bad;
+ }
+ /* don't allow broadcast messages to be fragmented */
+ if (ip->ip_len > ifp->if_mtu) {
+ error = EMSGSIZE;
+ goto bad;
+ }
}
/*
* If small enough for interface, can just send directly.
*/
if (ip->ip_len <= ifp->if_mtu) {
}
/*
* If small enough for interface, can just send directly.
*/
if (ip->ip_len <= ifp->if_mtu) {
-#if vax
ip->ip_len = htons((u_short)ip->ip_len);
ip->ip_off = htons((u_short)ip->ip_off);
ip->ip_len = htons((u_short)ip->ip_len);
ip->ip_off = htons((u_short)ip->ip_off);
-#endif
ip->ip_sum = 0;
ip->ip_sum = in_cksum(m, hlen);
ip->ip_sum = 0;
ip->ip_sum = in_cksum(m, hlen);
- return ((*ifp->if_output)(ifp, m,
-#ifdef notdef
- &ro->ro_rt->rt_dest));
-#else
- (struct sockaddr *)&tempaddr));
-#endif
+ error = (*ifp->if_output)(ifp, m, dst);
+ goto done;
}
/*
* Too large for interface; fragment if possible.
* Must be able to put at least 8 bytes per fragment.
*/
}
/*
* Too large for interface; fragment if possible.
* Must be able to put at least 8 bytes per fragment.
*/
- if (ip->ip_off & IP_DF)
+ if (ip->ip_off & IP_DF) {
+ error = EMSGSIZE;
goto bad;
goto bad;
+ }
len = (ifp->if_mtu - hlen) &~ 7;
len = (ifp->if_mtu - hlen) &~ 7;
- if (len < 8)
+ if (len < 8) {
+ error = EMSGSIZE;
goto bad;
goto bad;
+ }
/*
* Discard IP header from logical mbuf for m_copy's sake.
/*
* Discard IP header from logical mbuf for m_copy's sake.
@@
-103,11
+140,13
@@
COUNT(IP_OUTPUT);
m->m_len -= sizeof (struct ip);
m->m_off += sizeof (struct ip);
for (off = 0; off < ip->ip_len-hlen; off += len) {
m->m_len -= sizeof (struct ip);
m->m_off += sizeof (struct ip);
for (off = 0; off < ip->ip_len-hlen; off += len) {
- struct mbuf *mh = m_get(M_DONTWAIT);
+ struct mbuf *mh = m_get(M_DONTWAIT
, MT_HEADER
);
struct ip *mhip;
struct ip *mhip;
- if (mh == 0)
+ if (mh == 0) {
+ error = ENOBUFS;
goto bad;
goto bad;
+ }
mh->m_off = MMAXOFF - hlen;
mhip = mtod(mh, struct ip *);
*mhip = *ip;
mh->m_off = MMAXOFF - hlen;
mhip = mtod(mh, struct ip *);
*mhip = *ip;
@@
-124,32
+163,28
@@
COUNT(IP_OUTPUT);
mhip->ip_off |= IP_MF;
}
mhip->ip_len += sizeof (struct ip);
mhip->ip_off |= IP_MF;
}
mhip->ip_len += sizeof (struct ip);
-#if vax
mhip->ip_len = htons((u_short)mhip->ip_len);
mhip->ip_len = htons((u_short)mhip->ip_len);
-#endif
mh->m_next = m_copy(m, off, len);
if (mh->m_next == 0) {
(void) m_free(mh);
mh->m_next = m_copy(m, off, len);
if (mh->m_next == 0) {
(void) m_free(mh);
+ error = ENOBUFS; /* ??? */
goto bad;
}
goto bad;
}
-#if vax
mhip->ip_off = htons((u_short)mhip->ip_off);
mhip->ip_off = htons((u_short)mhip->ip_off);
-#endif
mhip->ip_sum = 0;
mhip->ip_sum = in_cksum(mh, hlen);
mhip->ip_sum = 0;
mhip->ip_sum = in_cksum(mh, hlen);
- if ((*ifp->if_output)(ifp, mh,
-#ifdef notdef
- &ro->ro_rt->rt_dest) == 0)
-#else
- (struct sockaddr *)&tempaddr) == 0)
-#endif
- goto bad;
+ if (error = (*ifp->if_output)(ifp, mh, dst))
+ break;
}
m_freem(m);
}
m_freem(m);
- return (1);
+ goto done;
+
bad:
m_freem(m);
bad:
m_freem(m);
- return (0);
+done:
+ if (ro == &iproute && (flags & IP_ROUTETOIF) == 0 && ro->ro_rt)
+ RTFREE(ro->ro_rt);
+ return (error);
}
/*
}
/*
@@
-164,7
+199,6
@@
ip_optcopy(ip, jp, off)
register u_char *cp, *dp;
int opt, optlen, cnt;
register u_char *cp, *dp;
int opt, optlen, cnt;
-COUNT(IP_OPTCOPY);
cp = (u_char *)(ip + 1);
dp = (u_char *)(jp + 1);
cnt = (ip->ip_hl << 2) - sizeof (struct ip);
cp = (u_char *)(ip + 1);
dp = (u_char *)(jp + 1);
cnt = (ip->ip_hl << 2) - sizeof (struct ip);