[bouffalo lab] fix crash issues in route hook and rpc uart driver mod… (#36944)

* [bouffalo lab] fix crash issues in route hook and rpc uart driver modules

* Restyled by clang-format

---------

Co-authored-by: Restyled.io <commits@restyled.io>

Author: wy-hh

examples/platform/bouffalolab/bl602/lwipopts/lwipopts.h

@@ -61,7 +61,7 @@ a lot of data that needs to be copied, this should be set high. */
 
 /* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
    per active UDP "connection". */
-#define MEMP_NUM_UDP_PCB 8
+#define MEMP_NUM_UDP_PCB 12
 
 /* MEMP_NUM_TCP_PCB: the number of simulatenously active TCP
    connections. */

examples/platform/bouffalolab/common/route_hook/bl_route_hook.c

@@ -168,12 +168,12 @@ int8_t bl_route_hook_init(void)
         goto exit;
     }
 
-    for (bl_route_hook_t * iter = s_hooks; iter != NULL; iter++)
+    for (bl_route_hook_t * iter = s_hooks; iter != NULL; iter = iter->next)
     {
         if (iter->netif == lwip_netif)
         {
             ret = 0;
-            break;
+            goto exit;
         }
     }
 
@@ -194,6 +194,12 @@ int8_t bl_route_hook_init(void)
 
     hook->netif = lwip_netif;
     hook->pcb   = raw_new_ip_type(IPADDR_TYPE_V6, IP6_NEXTH_ICMP6);
+    if (NULL == hook->pcb)
+    {
+        ret = -1;
+        goto exit;
+    }
+
     hook->pcb->flags |= RAW_FLAGS_MULTICAST_LOOP;
     hook->pcb->chksum_reqd = 1;
     // The ICMPv6 header checksum offset

examples/platform/bouffalolab/common/rpc/pw_sys_io/sys_io.cc

@@ -31,14 +31,14 @@ Status ReadByte(std::byte * dest)
         return Status::InvalidArgument();
 
     int16_t ret = uartRead(reinterpret_cast<char *>(dest), 1);
-    return ret <= 0 ? Status::FailedPrecondition() : OkStatus();
+    return ret < 0 ? Status::FailedPrecondition() : OkStatus();
 }
 
 Status WriteByte(std::byte b)
 {
     int16_t ret = uartWrite(reinterpret_cast<const char *>(&b), 1);
 
-    return ret <= 0 ? Status::FailedPrecondition() : OkStatus();
+    return ret < 0 ? Status::FailedPrecondition() : OkStatus();
 }
 
 // Writes a string using pw::sys_io, and add newline characters at the end.