Ping/DNS fixes (part 2 of 2)

git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5236 42af7a65-404d-4744-a932-0658087f49c3

apps/include/netutils/resolv.h

@@ -75,6 +75,7 @@ EXTERN int  resolv_query(FAR const char *name, FAR struct sockaddr_in *addr);
 #endif
 
 EXTERN int  dns_gethostip(const char *hostname, in_addr_t *ipaddr);
+
 #define dns_setserver   resolv_conf
 #define dns_getserver   resolv_getserver
 #define dns_whois       resolv_query

apps/netutils/resolv/Kconfig

@@ -16,7 +16,7 @@ config NET_RESOLV_ENTRIES
 	---help---
 		Number of resolver entries.  Default: 8
 
-NET_RESOLV_MAXRESPONSE
+config NET_RESOLV_MAXRESPONSE
 	int "Max response size"
 	default 96
 	depends on NETUTILS_RESOLV

apps/nshlib/Kconfig

@@ -520,3 +520,12 @@ config NSH_NOMAC
 	---help---
 		Set if your ethernet hardware has no built-in MAC address.
 		If set, a bogus MAC will be assigned.
+
+config NSH_MAX_ROUNDTRIP
+	int "Max Ping Round-Trip (DSEC)"
+	default 20
+	depends on NSH_LIBRARY && NET && !NSH_DISABLE_PING
+	---help---
+		This is the maximum round trip for a response to a ICMP ECHO request.
+		It is in units of deciseconds.  The default is 20 (2 seconds).
+

apps/nshlib/nsh.h

@@ -215,6 +215,15 @@
 
 #endif /* CONFIG_NSH_TELNET_LOGIN */
 
+/* CONFIG_NSH_MAX_ROUNDTRIP - This is the maximum round trip for a response to
+ *   a ICMP ECHO request. It is in units of deciseconds.  The default is 20
+ *   (2 seconds).
+ */
+
+#ifndef CONFIG_NSH_MAX_ROUNDTRIP
+#  define CONFIG_NSH_MAX_ROUNDTRIP 20
+#endif
+
 /* Verify support for ROMFS /etc directory support options */
 
 #ifdef CONFIG_NSH_ROMFSETC

apps/nshlib/nsh_netcmds.c

@@ -94,8 +94,16 @@
  * Definitions
  ****************************************************************************/
 
+/* Size of the ECHO data */
+
 #define DEFAULT_PING_DATALEN 56
 
+/* Get the larger value */
+
+#ifndef MAX
+#  define MAX(a,b) (a > b ? a : b)
+#endif
+
 /****************************************************************************
  * Private Types
  ****************************************************************************/
@@ -543,6 +551,7 @@ int cmd_ping(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
   uint32_t start;
   uint32_t next;
   uint32_t dsec = 10;
+  uint32_t maxwait;
   uint16_t id;
   bool badarg = false;
   int count = 10;
@@ -626,6 +635,12 @@ int cmd_ping(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
 
   id = ping_newid();
 
+  /* The maximum wait for a response will be the larger of the inter-ping time and
+   * the configured maximum round-trip time.
+   */
+
+  maxwait = MAX(dsec, CONFIG_NSH_MAX_ROUNDTRIP);
+
   /* Loop for the specified count */
 
   nsh_output(vtbl, "PING %d.%d.%d.%d %d bytes of data\n",
@@ -639,7 +654,7 @@ int cmd_ping(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
       /* Send the ECHO request and wait for the response */
 
       next  = g_system_timer;
-      seqno = uip_ping(ipaddr, id, i, DEFAULT_PING_DATALEN, dsec);
+      seqno = uip_ping(ipaddr, id, i, DEFAULT_PING_DATALEN, maxwait);
 
       /* Was any response returned? We can tell if a non-negative sequence
        * number was returned.
@@ -647,7 +662,7 @@ int cmd_ping(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
 
       if (seqno >= 0 && seqno <= i)
         {
-          /* Get the elpased time from the time that the request was
+          /* Get the elapsed time from the time that the request was
            * sent until the response was received.  If we got a response
            * to an earlier request, then fudge the elpased time.
            */
@@ -655,7 +670,7 @@ int cmd_ping(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
           elapsed = TICK2MSEC(g_system_timer - next);
           if (seqno < i)
             {
-              elapsed += 100*dsec*(i - seqno);
+              elapsed += 100 * dsec * (i - seqno);
             }
 
           /* Report the receipt of the reply */
@@ -673,7 +688,7 @@ int cmd_ping(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
       elapsed = TICK2DSEC(g_system_timer - next);
       if (elapsed < dsec)
         {
-          usleep(100000*dsec);
+          usleep(100000 * (dsec - elapsed));
         }
     }
 

nuttx/net/uip/uip_icmpping.c

@@ -123,6 +123,7 @@ static inline int ping_timeout(struct icmp_ping_s *pstate)
     {
       return TRUE;
     }
+
   return FALSE;
 }
 
@@ -365,6 +366,7 @@ int uip_ping(uip_ipaddr_t addr, uint16_t id, uint16_t seqno,
 
       uip_icmpcallbackfree(state.png_cb);
     }
+
   uip_unlock(save);
 
   /* Return the negated error number in the event of a failure, or the