projects / unix-history / blobdiff
? search:
summary | tags | clone url | shortlog | log | commit | commitdiff | tree
raw | inline | side by side
remove /usr/include dependencies
[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 fb2d21d..034d856 100644 (file)
--- a/usr/src/sys/netinet/ip_output.c
+++ b/usr/src/sys/netinet/ip_output.c
@@ -1,17 +1,22 @@
-/*     ip_output.c     1.32    82/04/10        */
+/*     ip_output.c     1.46    83/02/10        */
 
 #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"
-#include <errno.h>
+
+#include "../netinet/in.h"
+#include "../netinet/in_systm.h"
+#include "../netinet/ip.h"
+#include "../netinet/ip_var.h"
+
+#include "../machine/mtpr.h"
+
+int    ipnorouteprint = 0;
 
 ip_output(m, opt, ro, allowbroadcast)
        struct mbuf *m;
 
 ip_output(m, opt, ro, allowbroadcast)
        struct mbuf *m;
@@ -25,7 +30,6 @@ ip_output(m, opt, ro, allowbroadcast)
        struct route iproute;
        struct sockaddr *dst;
 
        struct route iproute;
        struct sockaddr *dst;
 
-COUNT(IP_OUTPUT);
        if (opt)                                /* XXX */
                (void) m_free(opt);             /* XXX */
        /*
        if (opt)                                /* XXX */
                (void) m_free(opt);             /* XXX */
        /*
@@ -37,39 +41,61 @@ COUNT(IP_OUTPUT);
        ip->ip_id = htons(ip_id++);
 
        /*
        ip->ip_id = htons(ip_id++);
 
        /*
-        * Find interface for this packet in the routing
-        * table.  Note each interface has placed itself
-        * in there at boot time, so calls to rtalloc
-        * degenerate to if_ifonnetof(ip->ip_dst.s_net).
+        * 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) {
                ro->ro_dst.sa_family = AF_INET;
                ((struct sockaddr_in *)&ro->ro_dst)->sin_addr = ip->ip_dst;
        if (ro->ro_rt == 0) {
                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 (ro == &routetoif) {
+                       /* check ifp is AF_INET??? */
+                       ifp = if_ifonnetof(in_netof(ip->ip_dst));
+                       if (ifp == 0)
+                               goto unreachable;
+                       goto gotif;
+               }
                rtalloc(ro);
        }
                rtalloc(ro);
        }
-       if (ro->ro_rt == 0 || (ifp = ro->ro_rt->rt_ifp) == 0) {
-               extern int ipprintfs;
-
-               if (ipprintfs)
-                       printf("no route to %x (from %x, len %d)\n",
-                           ip->ip_dst.s_addr, ip->ip_src.s_addr, ip->ip_len);
-               error = ENETUNREACH;
-               goto bad;
-       }
-       dst = ro->ro_rt->rt_flags & RTF_DIRECT ?
-           (struct sockaddr *)&ro->ro_dst : &ro->ro_rt->rt_gateway;
-       if (ro == &iproute)
-               RTFREE(ro->ro_rt);
-       if (!allowbroadcast && (ifp->if_flags & IFF_BROADCAST)) {
-               struct sockaddr_in *sin;
+       if (ro->ro_rt == 0 || (ifp = ro->ro_rt->rt_ifp) == 0)
+               goto unreachable;
+       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
 
 
-               sin = (struct sockaddr_in *)&ifp->if_broadaddr;
-               if (sin->sin_addr.s_addr == ip->ip_dst.s_addr) {
-                       error = EPERM;          /* ??? */
+       /*
+        * Look for broadcast address and
+        * and verify user is allowed to send
+        * such a packet.
+        */
+       if (in_lnaof(dst) == INADDR_ANY) {
+               if ((ifp->if_flags & IFF_BROADCAST) == 0) {
+                       error = EADDRNOTAVAIL;
+                       goto bad;
+               }
+               if (!allowbroadcast) {
+                       error = EACCES;
+                       goto bad;
+               }
+               /* don't allow broadcast messages to be fragmented */
+               if (ip->ip_len > ifp->if_mtu) {
+                       error = EMSGSIZE;
                        goto bad;
                }
        }
                        goto bad;
                }
        }
@@ -78,14 +104,12 @@ COUNT(IP_OUTPUT);
         * 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);
-               ro->ro_rt->rt_use++;
-               return ((*ifp->if_output)(ifp, m, dst));
+               error = (*ifp->if_output)(ifp, m, dst);
+               goto done;
        }
 
        /*
        }
 
        /*
@@ -110,7 +134,7 @@ 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;
 
                if (mh == 0) {
                struct ip *mhip;
 
                if (mh == 0) {
@@ -133,26 +157,32 @@ 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);
                        error = ENOBUFS;        /* ??? */
                        goto bad;
                }
                mh->m_next = m_copy(m, off, len);
                if (mh->m_next == 0) {
                        (void) m_free(mh);
                        error = ENOBUFS;        /* ??? */
                        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);
-               ro->ro_rt->rt_use++;
                if (error = (*ifp->if_output)(ifp, mh, dst))
                        break;
        }
                if (error = (*ifp->if_output)(ifp, mh, dst))
                        break;
        }
+       m_freem(m);
+       goto done;
+
+unreachable:
+       if (ipnorouteprint)
+               printf("no route to %x (from %x, len %d)\n",
+                   ip->ip_dst.s_addr, ip->ip_src.s_addr, ip->ip_len);
+       error = ENETUNREACH;
 bad:
        m_freem(m);
 bad:
        m_freem(m);
+done:
+       if (ro == &iproute && ro->ro_rt)
+               RTFREE(ro->ro_rt);
        return (error);
 }
 
        return (error);
 }
 
@@ -168,7 +198,6 @@ 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);
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.