xnu-344.32.tar.gz

[apple/xnu.git] / bsd / netat / ddp_rtmp.c

diff --git a/bsd/netat/ddp_rtmp.c b/bsd/netat/ddp_rtmp.c
index 59e7a25fd6d4f97a579763f598296d97d03057b3..c1b40b63e11f84fe57d1961fd63c09f59b1edb98 100644 (file)
--- a/bsd/netat/ddp_rtmp.c
+++ b/bsd/netat/ddp_rtmp.c
@@ -55,6 +55,8 @@
 #include <netat/debug.h>
 #include <netat/at_pcb.h>
 
+#include <sys/kern_event.h>
+
 extern void rtmp_router_input();
 
 /****************************************************************/
@@ -141,16 +143,24 @@ void trackrouter(ifID, net, node)
                        unused = router;
        }
        if (unused) {
-               router_added++;
+               router_added++;
 
+               if (ifID->ifARouter.s_net == 0) {
+                       /* Send event that this interface just got a router. This does not
+                               discriminate on whether this router is valid or not. If it is not
+                               valid rtmp_input will send a KEV_ATALK_ROUTERUP_INVALID event. */
+                       atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ROUTERUP, 0, 0);
+               }
+               
                unused->ifID = ifID;
                NET(unused) =  net;
                NODE(unused) = node;
+               ifID->ifRouterState = ROUTER_AROUND;
                timeout(ddp_age_router, (caddr_t) unused, 50*SYS_HZ);
+               
                if (NET(ifID) == 0 && NODE(ifID) == 0) {
                        NET(ifID) = net;
                        NODE(ifID) = node;
-                       ifID->ifRouterState = ROUTER_AROUND;
                }
        }
 }
@@ -189,24 +199,30 @@ void ddp_age_router(deadrouter)
                                newrouter = NULL;
                }
                if (newrouter) {
+                       /* Set our router to another on the list and go on with life */
                        NET(ourrouter) = NET(newrouter);
                        NODE(ourrouter) = NODE(newrouter);
                }
                else {
                        /* from gorouterless() */
+                       /* We have no other routers. */
                        ATTRACE(AT_MID_DDP, AT_SID_TIMERS, AT_LV_WARNING, FALSE,
                                "ddp_age_router entry : ARouter = 0x%x, RouterState = 0x%x",
                                ATALK_VALUE(ourrouter->ifARouter), ourrouter->ifRouterState, 0);
 
                        switch (ourrouter->ifRouterState) {
                        case ROUTER_AROUND :
+                               /* This is where we lose our cable.
+                                       Reset router fields and state accordingly. */
                                ourrouter->ifARouter.s_net = 0;
                                ourrouter->ifARouter.s_node = 0;
-                               dPrintf(D_M_RTMP,D_L_INFO,
-                                       ("rtmp.c Gorouterless!!!!!!!!\n"));
                                ourrouter->ifThisCableStart = DDP_MIN_NETWORK;
                                ourrouter->ifThisCableEnd = DDP_MAX_NETWORK;
                                ourrouter->ifRouterState = NO_ROUTER;
+
+                               /* Send event to indicate that we've lost our seed router. */
+                               atalk_post_msg(ourrouter->aa_ifp, KEV_ATALK_ROUTERDOWN, 0, 0);
+
                                zip_control(ourrouter, ZIP_NO_ROUTER);
                                break;
                        case ROUTER_WARNING :
@@ -285,13 +301,18 @@ void rtmp_input (mp, ifID)
                                 * ignore the presence of router
                                 */
                                if (ifID->ifRouterState == NO_ROUTER) {
-                                       dPrintf(D_M_RTMP, D_L_STARTUP,
-                                               ("Warning: new router came up: invalid startup net/node\n"));
+                                       dPrintf(D_M_RTMP, D_L_INFO, ("rtmp_input: new router came up, INVALID: net \
+                                               in startup range.\n"));
+                                       /* trackrouter sends a KEV_ATALK_ROUTERUP event to note that
+                                               a new router has come up when we had none before. */
                                        trackrouter(ifID,
                                                    NET_VALUE(rtmp->at_rtmp_this_net),
                                                    rtmp->at_rtmp_id[0]
                                                    );
                                        ifID->ifRouterState = ROUTER_WARNING;
+                                       
+                                       /* This router is invalid. Send event. */
+                                       atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ROUTERUP_INVALID, 0, 0);
                                }
                        } else {
                                /* our address
@@ -308,6 +329,11 @@ void rtmp_input (mp, ifID)
                                         */
                                        ifID->ifThisCableStart = range_start;
                                        ifID->ifThisCableEnd = range_end;
+
+                                       /* A seed router that gives us back our cable range came up.
+                                               It's a valid router and gives us our network back. */
+                                       atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ROUTERUP, 0, 0);
+
                                        trackrouter(ifID,
                                                    NET_VALUE(rtmp->at_rtmp_this_net),
                                                    rtmp->at_rtmp_id[0]
@@ -320,13 +346,17 @@ void rtmp_input (mp, ifID)
                                         * router
                                         */
                                        if (ifID->ifRouterState == NO_ROUTER) {
-                                               dPrintf(D_M_RTMP,D_L_ERROR, 
-                                                       ("Warning: new router came up: invalid net/node\n"));
+                                               /* trackrouter sends a KEV_ATALK_ROUTERUP event to note that
+                                                       a new router has come up when we had none before. */
                                                trackrouter(ifID,
                                                            NET_VALUE(rtmp->at_rtmp_this_net),
                                                            rtmp->at_rtmp_id[0]
                                                            );
                                                ifID->ifRouterState = ROUTER_WARNING;
+
+                                               /* A new seed router came up, but the cable range is different
+                                                       than what we had before. */
+                                               atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ROUTERUP_INVALID, 0, 0);
                                        }
                                }
                        }