#include <unistd.h>#include <stdlib.h>#include <stdio.h>#include <string.h>#define LOCALHOST "localhost"#define TEST_HOST 7002//#define TEST_HOST 1000#define BUFFER_LEN 1024#ifdef CROSS#include <uip/uip_arp.h>#include <uip/uip_greth.h>static void send_key(void){    char ch;    char buf[BUFFER_LEN];    ch = 'i'; /* 隨便初始化一個(gè)值，第一次進(jìn)入循環(huán)時(shí)不退出就可以 */    while('q' != ch)    {        printf("put q to exit>");        ch = getchar();        buf[0] = ch;        buf[1] = '\0';        uip_send(buf, 2);        printf("  Sock send the %c\n", ch);    }}int main(void){    u16_t ipaddr[2];        uip_init();    uip_ipaddr(ipaddr, 192,168,0,153);   /*  while(1)    {        if (uip_connected())        {            printf("has connected\n");            break;        }    }   */    uip_connect(ipaddr, HTONS(TEST_HOST));    send_key();    return 0;}#else /* do the x86 */#include <sys/socket.h>#include <sys/types.h>#include <arpa/inet.h>#include <netdb.h>static int get_connected_socket(void);static void send_key_by_sock(int sock);int main(int argc, char **argv) {     int sock;     sock = get_connected_socket();    send_key_by_sock(sock);        close(sock);     return 0;} static void send_key_by_sock(int sock){    char ch;    char buf[BUFFER_LEN];    ch = 'i'; /* 隨便初始化一個(gè)值，第一次進(jìn)入循環(huán)時(shí)不退出就可以 */    while('q' != ch)    {        printf("put q to exit>");        ch = getchar();        buf[0] = ch;        buf[1] = '\0';        if (send(sock, buf, 1, 0))        {            perror("gsending on stream socket");        }        printf("  Sock send the %c\n", ch);    }}static int get_connected_socket(void){    int sock;     struct sockaddr_in server;     struct hostent *hp;     /* 建立套接字 */     sock = socket(AF_INET, SOCK_STREAM, 0);     if (sock < 0)     {         perror("opening stream socket");         exit(1);     }         /* 使用命令行中指定的名字連接套接字 */     server.sin_family = AF_INET;     hp = gethostbyname(LOCALHOST);     if (NULL == hp)     {         fprintf(stderr, "g%s: unknown host \n", LOCALHOST);         exit(2);     }         printf("host address is %s\n", (char *)hp->h_addr);    memcpy((void *)&server.sin_addr, (void *)hp->h_addr, hp->h_length);     server.sin_port = htons(TEST_HOST);     if (connect(sock, (struct sockaddr*)&server, sizeof(server)) < 0)    {         perror("gconnecting stream socket");         exit(3);     }     return sock;}#endif /* end x86 */