Make endianity swapping simpler.

proto/ospf/lsalib.c

@@ -105,7 +105,7 @@ htonlsah(struct ospf_lsa_header *h, struct ospf_lsa_header *n)
   n->sn = htonl(h->sn);
   n->checksum = htons(h->checksum);
   n->length = htons(h->length);
-};
+}
 
 void
 ntohlsah(struct ospf_lsa_header *n, struct ospf_lsa_header *h)
@@ -120,150 +120,29 @@ ntohlsah(struct ospf_lsa_header *n, struct ospf_lsa_header *h)
   h->sn = ntohl(n->sn);
   h->checksum = ntohs(n->checksum);
   h->length = ntohs(n->length);
-};
+}
 
 void
 htonlsab(void *h, void *n, u16 type, u16 len)
 {
-  unsigned int i;
+  u32 *hid = h;
+  u32 *nid = n;
+  int i;
 
-  switch (type)
+  for (i = 0; i < (len / sizeof(u32)); i++)
-  {
+    nid[i] = htonl(hid[i]);
-  case LSA_T_RT:
+}
-    {
-      struct ospf_lsa_rt *hrt, *nrt;
-      struct ospf_lsa_rt_link *hrtl, *nrtl;
-      u16 links;
-
-      nrt = n;
-      hrt = h;
-
-#ifdef OSPFv2
-      links = hrt->links;
-      nrt->options = htons(hrt->options);
-      nrt->links = htons(hrt->links);
-#else /* OSPFv3 */
-      nrt->options = htonl(hrt->options);
-      links = (len - sizeof(struct ospf_lsa_rt)) /
-	sizeof(struct ospf_lsa_rt_link);
-#endif
-
-      nrtl = (struct ospf_lsa_rt_link *) (nrt + 1);
-      hrtl = (struct ospf_lsa_rt_link *) (hrt + 1);
-      for (i = 0; i < links; i++)
-      {
-#ifdef OSPFv2
-	nrtl[i].id = htonl(hrtl[i].id);
-	nrtl[i].data = htonl(hrtl[i].data);
-	nrtl[i].type = hrtl[i].type;
-	nrtl[i].notos = hrtl[i].notos;
-	nrtl[i].metric = htons(hrtl[i].metric);
-#else /* OSPFv3 */
-	nrtl[i].type = hrtl[i].type;
-	nrtl[i].padding = 0;
-	nrtl[i].metric = htons(hrtl[i].metric);
-	nrtl[i].lif = htonl(hrtl[i].lif);
-	nrtl[i].nif = htonl(hrtl[i].nif);
-	nrtl[i].id = htonl(hrtl[i].id);
-#endif
-      }
-      break;
-    }
-  case LSA_T_NET:
-  case LSA_T_SUM_NET:
-  case LSA_T_SUM_RT:
-  case LSA_T_EXT:
-#ifdef OSPFv3
-  case LSA_T_LINK:
-  case LSA_T_PREFIX:
-#endif
-    {
-      u32 *hid, *nid;
-
-      nid = n;
-      hid = h;
-
-      for (i = 0; i < (len / sizeof(u32)); i++)
-      {
-	*(nid + i) = htonl(*(hid + i));
-      }
-      break;
-    }
-
-  default:
-    bug("(hton): Unknown LSA");
-  }
-};
 
 void
 ntohlsab(void *n, void *h, u16 type, u16 len)
 {
-  unsigned int i;
+  u32 *nid = n;
-  switch (type)
+  u32 *hid = h;
-  {
+  int i;
-  case LSA_T_RT:
-    {
-      struct ospf_lsa_rt *hrt, *nrt;
-      struct ospf_lsa_rt_link *hrtl, *nrtl;
-      u16 links;
 
-      nrt = n;
+  for (i = 0; i < (len / sizeof(u32)); i++)
-      hrt = h;
+    hid[i] = ntohl(nid[i]);
-
+}
-#ifdef OSPFv2
-      hrt->options = ntohs(nrt->options);
-      links = hrt->links = ntohs(nrt->links);
-#else /* OSPFv3 */
-      hrt->options = ntohl(nrt->options);
-      links = (len - sizeof(struct ospf_lsa_rt)) /
-	sizeof(struct ospf_lsa_rt_link);
-#endif
-
-      nrtl = (struct ospf_lsa_rt_link *) (nrt + 1);
-      hrtl = (struct ospf_lsa_rt_link *) (hrt + 1);
-      for (i = 0; i < links; i++)
-      {
-#ifdef OSPFv2
-	hrtl[i].id = ntohl(nrtl[i].id);
-	hrtl[i].data = ntohl(nrtl[i].data);
-	hrtl[i].type = nrtl[i].type;
-	hrtl[i].notos = nrtl[i].notos;
-	hrtl[i].metric = ntohs(nrtl[i].metric);
-#else /* OSPFv3 */
-	hrtl[i].type = nrtl[i].type;
-	hrtl[i].padding = 0;
-	hrtl[i].metric = ntohs(nrtl[i].metric);
-	hrtl[i].lif = ntohl(nrtl[i].lif);
-	hrtl[i].nif = ntohl(nrtl[i].nif);
-	hrtl[i].id = ntohl(nrtl[i].id);
-#endif
-      }
-      break;
-    }
-  case LSA_T_NET:
-  case LSA_T_SUM_NET:
-  case LSA_T_SUM_RT:
-  case LSA_T_EXT:
-#ifdef OSPFv3
-  case LSA_T_LINK:
-  case LSA_T_PREFIX:
-#endif
-    {
-      u32 *hid, *nid;
-
-      hid = h;
-      nid = n;
-
-      for (i = 0; i < (len / sizeof(u32)); i++)
-      {
-	hid[i] = ntohl(nid[i]);
-      }
-      break;
-    }
-  default:
-    bug("(ntoh): Unknown LSA");
-  }
-};
 
 void
 buf_dump(const char *hdr, const byte *buf, int blen)

proto/ospf/ospf.h

@@ -389,17 +389,28 @@ struct ospf_lsa_header
 
 struct ospf_lsa_rt
 {
+#ifdef CPU_BIG_ENDIAN
   u16 options;	/* VEB flags only */
   u16 links;
+#else
+  u16 links;
+  u16 options;	/* VEB flags only */
+#endif
 };
 
 struct ospf_lsa_rt_link
 {
   u32 id;
   u32 data;
+#ifdef CPU_BIG_ENDIAN
   u8 type;
-  u8 notos;
+  u8 padding;
   u16 metric;
+#else
+  u16 metric;
+  u8 padding;
+  u8 type;
+#endif
 };
 
 struct ospf_lsa_net
@@ -438,9 +449,15 @@ struct ospf_lsa_rt
 
 struct ospf_lsa_rt_link
 {
+#ifdef CPU_BIG_ENDIAN
   u8 type;
   u8 padding;
   u16 metric;
+#else
+  u16 metric;
+  u8 padding;
+  u8 type;
+#endif
   u32 lif;	/* Local interface ID */
   u32 nif;	/* Neighbor interface ID */
   u32 id;	/* Neighbor router ID */
@@ -481,8 +498,13 @@ struct ospf_lsa_link
 
 struct ospf_lsa_prefix
 {
+#ifdef CPU_BIG_ENDIAN
   u16 pxcount;
   u16 ref_type;
+#else
+  u16 ref_type;
+  u16 pxcount;
+#endif
   u32 ref_id;
   u32 ref_rt;
   u32 rest[];
@@ -514,57 +536,6 @@ static inline unsigned lsa_net_count(struct ospf_lsa_header *lsa)
 }
 
 
-/*
-struct ospf_lsa_ext_etos 
-{
-#ifdef CPU_BIG_ENDIAN
-  u8 ebit:1;
-  u8 tos:7;
-  u8 padding1;
-  u16 padding2;
-#else
-  u16 padding2;
-  u8 padding1;
-  u8 tos:7;
-  u8 ebit:1;
-#endif
-};
-
-
-struct ospf_lsa_sum_tos 
-{
-#ifdef CPU_BIG_ENDIAN
-  u8 tos;
-  u8 padding1;
-  u16 padding2;
-#else
-  u16 padding2;
-  u8 padding1;
-  u8 tos;
-#endif
-};
-
-union ospf_lsa_sum_tm
-{
-  struct ospf_lsa_sum_tos tos;
-  u32 metric;
-};
-
-union ospf_lsa_ext_etm
-{
-  struct ospf_lsa_ext_etos etos;
-  u32 metric;
-};
-
-struct ospf_lsa_ext_tos
-{
-  union ospf_lsa_ext_etm etm;
-  ip_addr fwaddr;
-  u32 tag;
-};
-
-*/
-
 struct ospf_lsreq_header
 {
   u32 type;

proto/ospf/topology.c

@@ -211,7 +211,7 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 *length)
 	  ln->data = (ifa->iface->addr->flags & IA_UNNUMBERED) ?
 	    ifa->iface->index : ipa_to_u32(ifa->iface->addr->ip);
 	  ln->metric = ifa->cost;
-	  ln->notos = 0;
+	  ln->padding = 0;
 	  i++;
 	  master = 1;
 	}
@@ -226,7 +226,7 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 *length)
 	    ln->id = ipa_to_u32(ifa->drip);
 	    ln->data = ipa_to_u32(ifa->iface->addr->ip);
 	    ln->metric = ifa->cost;
-	    ln->notos = 0;
+	    ln->padding = 0;
 	    i++;
 	    master = 1;
 	  }
@@ -241,7 +241,7 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 *length)
 	  ln->id = neigh->rid;
 	  ln->data = ipa_to_u32(ifa->iface->addr->ip);
 	  ln->metric = ifa->cost;
-	  ln->notos = 0;
+	  ln->padding = 0;
 	  i++;
 	  master = 1;
         }
@@ -268,7 +268,7 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 *length)
 	ln->id = ipa_to_u32(a->prefix);
 	ln->data = ipa_to_u32(ipa_mkmask(a->pxlen));
 	ln->metric = ifa->cost;
-	ln->notos = 0;
+	ln->padding = 0;
 	i++;
       }
   }
@@ -282,7 +282,7 @@ originate_rt_lsa_body(struct ospf_area *oa, u16 *length)
 	ln->id = ipa_to_u32(sn->px.addr);
 	ln->data = ipa_to_u32(ipa_mkmask(sn->px.len));
 	ln->metric = sn->cost;
-	ln->notos = 0;
+	ln->padding = 0;
 	i++;
       }