fix bug

MDK-ARM/LWIP.uvoptx

@@ -157,9 +157,9 @@
         <Bp>
           <Number>0</Number>
           <Type>0</Type>
-          <LineNumber>72</LineNumber>
+          <LineNumber>80</LineNumber>
           <EnabledFlag>1</EnabledFlag>
-          <Address>134233266</Address>
+          <Address>134233272</Address>
           <ByteObject>0</ByteObject>
           <HtxType>0</HtxType>
           <ManyObjects>0</ManyObjects>
@@ -168,7 +168,7 @@
           <BreakIfRCount>1</BreakIfRCount>
           <Filename>..\usersrc\atcmd.c</Filename>
           <ExecCommand></ExecCommand>
-          <Expression>\\LWIP\../usersrc/atcmd.c\72</Expression>
+          <Expression>\\LWIP\../usersrc/atcmd.c\80</Expression>
         </Bp>
       </Breakpoint>
       <WatchWindow1>
@@ -185,7 +185,7 @@
         <Ww>
           <count>2</count>
           <WinNumber>1</WinNumber>
-          <ItemText>int_addr-&gt;addr</ItemText>
+          <ItemText>len</ItemText>
         </Ww>
       </WatchWindow1>
       <Tracepoint>

usersrc/atcmd.c

@@ -66,21 +66,22 @@ AT_STATUS at_cmd_ip(unsigned char *p, unsigned char len)
 {
     ip4_addr_t int_addr;
     char *ip_address;
-    ip_address = (char *)malloc(len);
-    memcpy(ip_address, p, len);
-    printf("ip_address:%s\r\n", ip_address);
-    inet_aton(ip_address, &int_addr);
-    printf("int_addr:%d\r\n", int_addr.addr);
+
     if (*p == '?')
     {
         printf("config ip address:%s\r\n", inet_ntoa(config_get()->ip));
     }
     else
     {
+        ip_address = (char *)malloc(len+1);
+        strncpy(ip_address, (const char *)p, len);
+        printf("ip_address:%s\r\n", ip_address);
+        inet_aton(ip_address, &int_addr);
+        printf("int_addr:%d\r\n", int_addr.addr);
         // printf("ip address:%s\r\n", p);
         printf("AT+OK\r\n");
+        free(ip_address);
     }
-    free(ip_address);
     return AT_SUCCESS;
 }