first commit for opensource

first commit for opensource

examples/tcp_udp_base_lwip/udp_server/udp_server.c

@@ -0,0 +1,47 @@
+#include "udp_server.h"
+#include "lwip/api.h"
+#include <lwip/sockets.h>
+#include <lwip/err.h>
+#include <lwip/sys.h>
+
+char buff[512];	// UDP<44><50><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݻ<EFBFBD><DDBB><EFBFBD><EFBFBD><EFBFBD>
+const unsigned short server_port = 8000;
+
+void application_entry(void *arg)
+{
+    int sockfd, i;
+    ssize_t err, len;
+    struct sockaddr_in serveraddr, clientaddr;
+    char ipstr[INET_ADDRSTRLEN]; // 16 Bytes
+    socklen_t clientlen;
+
+    MX_LWIP_Init();
+
+    /* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>UDP<44><50><EFBFBD>׽<EFBFBD><D7BD><EFBFBD> */
+    sockfd = socket(AF_INET, SOCK_DGRAM, 0);
+    memset(&serveraddr, 0, sizeof(serveraddr));
+    serveraddr.sin_family = AF_INET;
+    serveraddr.sin_addr.s_addr = htonl(INADDR_ANY); //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>IP
+    serveraddr.sin_port = htons(server_port);
+    while (1) {
+        bind(sockfd, (struct sockaddr *)&serveraddr, sizeof(serveraddr));
+        printf("udp blind ip:ANY,port:%d\n", server_port);
+        clientlen = sizeof(clientaddr);
+        len = recvfrom(sockfd, buff, sizeof(buff), 0, (struct sockaddr *)&clientaddr, &clientlen);
+        printf("client IP %s\tPORT %d\nrec:%s\n",  inet_ntop(AF_INET, &clientaddr.sin_addr.s_addr, ipstr, sizeof(ipstr)), ntohs(clientaddr.sin_port), buff);
+
+        i = 0;
+        while (i < len) {
+            buff[i] = toupper(buff[i]);
+            i++;
+        }
+        buff[i] = '\0';
+        printf("send: %s\n", buff);
+        err = sendto(sockfd, buff, strlen(buff), 0, (struct sockaddr *)&clientaddr, sizeof(clientaddr));
+        if (err < 0){
+            break;
+        }
+    }
+    close(sockfd);
+}
+

examples/tcp_udp_base_lwip/udp_server/udp_server.h

@@ -0,0 +1,7 @@
+#ifndef __UDP_DEMO_H
+#define __UDP_DEMO_H
+
+#include "mcu_init.h"
+
+#endif
+