Changeset 347768d in mainline for uspace/srv/inet/inet_link.c

Timestamp:

2012-04-11T05:52:47Z (12 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

7f95c904

Parents:

7094e196

Message:

Fragmentation of outgoing datagrams, default link MTU.

File:

• uspace/srv/inet/inet_link.c (modified) (5 diffs)

uspace/srv/inet/inet_link.c

@@ -161 +161 @@
 
         ilink->svc_id = sid;
+        ilink->iplink = NULL;
 
         rc = loc_service_get_name(sid, &ilink->svc_name);
@@ -177 +178 @@
         if (rc != EOK) {
                 log_msg(LVL_ERROR, "Failed opening IP link '%s'",
+                    ilink->svc_name);
+                goto error;
+        }
+
+        rc = iplink_get_mtu(ilink->iplink, &ilink->def_mtu);
+        if (rc != EOK) {
+                log_msg(LVL_ERROR, "Failed determinning MTU of link '%s'",
                     ilink->svc_name);
                 goto error;
@@ -211 +219 @@
 
 error:
+        if (ilink->iplink != NULL)
+                iplink_close(ilink->iplink);
         inet_link_delete(ilink);
         return rc;
@@ -241 +251 @@
         inet_packet_t packet;
         int rc;
-
-        /* XXX Fragment packet */
+        size_t offs, roffs;
+
+        /*
+         * Fill packet structure. Fragmentation is performed by
+         * inet_pdu_encode().
+         */
         packet.src = dgram->src;
         packet.dest = dgram->dest;
@@ -254 +268 @@
         sdu.lsrc.ipv4 = lsrc->ipv4;
         sdu.ldest.ipv4 = ldest->ipv4;
-        rc = inet_pdu_encode(&packet, &sdu.data, &sdu.size);
-        if (rc != EOK)
-                return rc;
-
-        rc = iplink_send(ilink->iplink, &sdu);
-        free(sdu.data);
+
+        offs = 0;
+        do {
+                /* Encode one fragment */
+                rc = inet_pdu_encode(&packet, offs, ilink->def_mtu, &sdu.data,
+                    &sdu.size, &roffs);
+                if (rc != EOK)
+                        return rc;
+
+                /* Send the PDU */
+                rc = iplink_send(ilink->iplink, &sdu);
+                free(sdu.data);
+
+                offs = roffs;
+        } while (offs < packet.size);
 
         return rc;