modbus_tcp

add lwip_strerr
fix tcp_close

tests/mocs.c

@@ -141,10 +141,11 @@ void tcp_poll(void* pcb, void* poll, uint8_t interval) {
     dprint("tcp_poll\n");
 }
 
-void tcp_close(void* pcb) {
+err_t tcp_close(void* pcb) {
     UNUSED(pcb);
 
     dprint("tcp_close\n");
+    return ERR_OK;
 }
 
 void tcp_write(void* pcb, const char* data, size_t len, uint8_t apiflags) {
@@ -185,4 +186,11 @@ void pbuf_free(struct pbuf* p) {
 uint16_t pbuf_copy_partial(const struct pbuf* buf, void* dataptr, uint16_t len, uint16_t offset) {
     memcpy(dataptr, ((uint8_t*)(buf->payload)) + offset, len);
     return len;
+}
+
+const char* lwip_strerr(err_t err) {
+    UNUSED(err);
+
+    dprint("lwip_sterr\n");
+    return NULL;
 }

tests/mocs.h

@@ -120,7 +120,7 @@ void tcp_recv(void* pcb, tcp_recv_fn arg);
 void tcp_setprio(void* pcb, uint8_t prio);
 void tcp_err(void* pcb, void* err);
 void tcp_poll(void* pcb, void* poll, uint8_t interval);
-void tcp_close(void* pcb);
+err_t tcp_close(void* pcb);
 
 void tcp_write(void* pcb, const char* data, size_t len, uint8_t apiflags);
 void tcp_output(void* pcb);
@@ -131,6 +131,8 @@ size_t tcp_sndbuf(void* pcb);
 
 uint16_t pbuf_copy_partial(const struct pbuf* buf, void* dataptr, uint16_t len, uint16_t offset);
 
+const char* lwip_strerr(err_t err);
+
 #ifdef __cplusplus
 }
 #endif