/******************************************************************************//* This file has been written by Sergio Perez Alca駃z <serpeal@upvnet.upv.es> *//*            Departamento de Inform醫ica de Sistemas y Computadores          *//*            Universidad Polit閏nica de Valencia                             *//*            Valencia (Spain)                                                *//*                                                                            *//* The RTL-lwIP project has been supported by the Spanish Government Research *//* Office (CICYT) under grant TIC2002-04123-C03-03                            *//******************************************************************************/#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>#include <netdb.h>#include <stdio.h>#include <unistd.h> /* close */#define SUCCESS 0#define ERROR   1#define END_LINE 0x0A#define SERVER_PORT 10#define MAX_MSG 100int main (int argc, char *argv[]) {    int sd, newSd, cliLen;  struct sockaddr_in cliAddr, servAddr;  char line[MAX_MSG];  /* create socket */  sd = socket(AF_INET, SOCK_STREAM, 0);   if(sd<0) {    perror("cannot open socket ");    return ERROR;  }    /* bind server port */  servAddr.sin_family = AF_INET;  servAddr.sin_addr.s_addr = htonl(INADDR_ANY);  servAddr.sin_port = htons(SERVER_PORT);    if(bind(sd, (struct sockaddr *) &servAddr, sizeof(servAddr))<0) {    perror("cannot bind port ");    return ERROR;  }  listen(sd,5);      printf("%s: waiting for data on port TCP %u\n",argv[0],SERVER_PORT);    cliLen = sizeof(cliAddr);    newSd = accept(sd, (struct sockaddr *) &cliAddr, &cliLen);    if(newSd<0) {      perror("cannot accept connection ");      return ERROR;    }        /* receive segments */    while(read(newSd,line,10)!=0) {            printf("%s: received from %s:TCP%d : %s\n", argv[0], 	     inet_ntoa(cliAddr.sin_addr),	     ntohs(cliAddr.sin_port), line);    }      close(sd);  }