Print DHCP client state/progress.

00749357 · Silas Boyd-Wickizer · b9ca9bf6 · 00749357
--- a/net.c
+++ b/net.c
@@ -160,7 +160,42 @@ initnet_worker(void *x)
  start_timer(&t_dhcpf, &dhcp_fine_tmr,	"dhcp f timer",	DHCP_FINE_TIMER_MSECS);
  start_timer(&t_dhcpc, &dhcp_coarse_tmr, "dhcp c timer", DHCP_COARSE_TIMER_MSECS);
+  struct spinlock lk;
+  struct condvar cv;
+  int dhcp_state = 0;
+  const char *dhcp_states[] = {
+    [DHCP_RENEWING] "renewing",
+    [DHCP_SELECTING] "selecting",
+    [DHCP_CHECKING] "checking",
+    [DHCP_BOUND] "bound",
+  };
+  initlock(&lk, "dhcp sleep");
+  initcondvar(&cv, "dhcp cv sleep");
+  for (;;) {
+    if (dhcp_state != nif.dhcp->state) {
+      dhcp_state = nif.dhcp->state;
+      cprintf("netd: DHCP state %d (%s)\n", dhcp_state,
+              dhcp_states[dhcp_state] ? : "unknown");
+      if (dhcp_state == DHCP_BOUND) {
+        u32 ip = ntohl(nif.ip_addr.addr);
+        cprintf("netd: %02x:%02x:%02x:%02x:%02x:%02x" 
+                " bound to %u.%u.%u.%u\n", 
+                nif.hwaddr[0], nif.hwaddr[1], nif.hwaddr[2],
+                nif.hwaddr[3], nif.hwaddr[4], nif.hwaddr[5],
+                (ip & 0xff000000) >> 24,
+                (ip & 0x00ff0000) >> 16,
+                (ip & 0x0000ff00) >> 8,
+                (ip & 0x000000ff));
+      }
+    }
+    acquire(&lk);
+    cv_sleepto(&cv, &lk, nsectime() + 1000000000);
+    release(&lk);
+  }
 }
 void