Anko at 08:22, 23 June 2012

2012-06-23T08:22:52Z

Anko at 08:00, 23 June 2012

2012-06-23T08:00:49Z

Anko at 08:00, 23 June 2012

2012-06-23T08:00:32Z

Anko: Created page with "http://beej.us/guide/bgnet/output/html/singlepage/bgnet.html Изпращане приемане /***************************************************************\ ..."


2012-06-23T07:57:19Z
Created page with "http://beej.us/guide/bgnet/output/html/singlepage/bgnet.html   Изпращане приемане <code><pre>  /***************************************************************\ ..."
New page
http://beej.us/guide/bgnet/output/html/singlepage/bgnet.html





Изпращане приемане

<code><pre>



/***************************************************************\

 * 

 * server.c -- Hello world! socket connection

 * 

 * 

 * source: http://beej.us/guide/bgnet/output/html/singlepage/bgnet.html

 * 

 * edited by: ilianko

\***************************************************************/



#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <errno.h>

#include <string.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <netdb.h>

#include <arpa/inet.h>

#include <sys/wait.h> // child process

#include <signal.h>



#define PORT "3491"  // the port users will be connecting to



#define BACKLOG 10     // how many pending connections queue will hold

#define MAXDATASIZE 100



void sigchld_handler(int s)

{

    while(waitpid(-1, NULL, WNOHANG) > 0);

}





// get sockaddr, IPv4 or IPv6:

void *get_in_addr(struct sockaddr *sa)

{

    if (sa->sa_family == AF_INET) 

    {

        return &(((struct sockaddr_in*)sa)->sin_addr);

    }



    return &(((struct sockaddr_in6*)sa)->sin6_addr);

}



int main(void)

{

    int sockfd, new_fd;  // listen on sock_fd, new connection on new_fd

    

    struct addrinfo hints, *servinfo, *p;

    

    struct sockaddr_storage their_addr; // connector's address information

    

    socklen_t sin_size;

    

    struct sigaction sa;

    

    int yes=1;

    char s[INET6_ADDRSTRLEN];

    int rv, numbytes;  

    char buf[MAXDATASIZE];

    

    memset(&hints, 0, sizeof hints);

    hints.ai_family = AF_UNSPEC;

    hints.ai_socktype = SOCK_STREAM;

    hints.ai_flags = AI_PASSIVE; // use my IP



    

    if ((rv = getaddrinfo(NULL, PORT, &hints, &servinfo)) != 0) 

    {

        fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));

        return 1;

    }



    // loop through all the results and bind to the first we can

    for(p = servinfo; p != NULL; p = p->ai_next) 

    {

        if ((sockfd = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1)

        {

            perror("server: socket");

            continue;

        }



        if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1)

        {

            perror("setsockopt");

            exit(1);

        }



        if (bind(sockfd, p->ai_addr, p->ai_addrlen) == -1)

        {

            close(sockfd);

            perror("server: bind");

            continue;

        }



        break;

    }



    if (p == NULL)  

    {

        fprintf(stderr, "server: failed to bind\n");

        return 2;

    }



    freeaddrinfo(servinfo); // all done with this structure



    if (listen(sockfd, BACKLOG) == -1)

    {

        perror("listen");

        exit(1);

    }



    sa.sa_handler = sigchld_handler; // reap all dead processes

    sigemptyset(&sa.sa_mask);

    sa.sa_flags = SA_RESTART;

    

    if (sigaction(SIGCHLD, &sa, NULL) == -1) 

    {

        perror("sigaction");

        exit(1);

    }



    printf("server: waiting for connections...\n");



    while(1) // main accept() loop 

    {  

        sin_size = sizeof their_addr;

        

        //file descriptor of the new connection

        new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size);

        

        if (new_fd == -1)

        {

            perror("accept");

            continue;

        }



        //convert IP address from network form to printable (x.x.x.x) form

        inet_ntop(their_addr.ss_family,

            get_in_addr((struct sockaddr *)&their_addr),

            s, sizeof s);

        printf("server: got connection from %s\n", s);





        

        if (!fork()) // this is the child process

        { 

            close(sockfd); // child doesn't need the listener

            

            if (!fork())

            {

				scanf("%s", buf);

				while(1)

				{

		          		

				  if (send(new_fd, buf, strlen(buf), 0) == -1)

                perror("send");

                scanf("%s", buf);

			    }

            

            }

            

            if (!fork())

            {    

              while(1)

              {  

				  if ((numbytes = recv(new_fd, buf, MAXDATASIZE-1, 0)) == -1)

                  {

                     perror("recv");

                     exit(1);

                  }

			      buf[numbytes] = '\0';

			      printf("%s\n",buf);

			   }

            }

            

            close(new_fd);

            exit(0);

        }

        close(new_fd);  // parent doesn't need this

    }



    return 0;

}



</pre></code>





[[Category:C Справочник]]

← Older revision		Revision as of 08:22, 23 June 2012
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	http://beej.us/guide/bgnet/output/html/singlepage/bgnet.html		http://beej.us/guide/bgnet/output/html/singlepage/bgnet.html

		+	[[Internet programming]]

← Older revision		Revision as of 08:00, 23 June 2012
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−	~~Интернет~~ сървър чака връзка на порт 3914	+	мрежов сървър чака връзка на порт 3914
	<code><pre>		<code><pre>

← Older revision		Revision as of 08:00, 23 June 2012
Line 2:		Line 2:


−	~~Изпращане приемане~~	+
		+	Интернет сървър чака връзка на порт 3914
	<code><pre>		<code><pre>

Socket - Revision history

Anko at 08:22, 23 June 2012

Anko at 08:00, 23 June 2012

Anko at 08:00, 23 June 2012

Anko: Created page with "http://beej.us/guide/bgnet/output/html/singlepage/bgnet.html Изпращане приемане `/***************************************************************\ ..."`

Socket - Revision history

Anko at 08:22, 23 June 2012

Anko at 08:00, 23 June 2012

Anko at 08:00, 23 June 2012

Anko: Created page with "http://beej.us/guide/bgnet/output/html/singlepage/bgnet.html Изпращане приемане /***************************************************************\ ..."

Anko: Created page with "http://beej.us/guide/bgnet/output/html/singlepage/bgnet.html Изпращане приемане `/***************************************************************\ ..."`