Libubox components (1)--usock

One: Related API introduction

1. Related source files: usocket.h usocket.c

2. Type Mark

   1:  #define usock_tcp 0

   2:  #define usock_udp 1

   3:  #define usock_server        0x0100

   4:  #define usock_nocloexec        0x0200

   5:  #define usock_nonblock        0x0400

   6:  #define usock_numeric        0x0800

   7:  #define usock_ipv6only        0x2000

   8:  #define usock_ipv4only        0x4000

   9:  #define Usock_unix        0x8000

3. Interface functions

/** * Create a new network sock  * @param type-Flag * @param host-binds the address as server, and as client represents the address to be connected * @param ser Vice-Port * @return-sock fd > 0; error < 0  * /

int usock (intconstchar,const char *service);

Two: examples

Server code

   1:  #include <stdio.h>

   2:  #include <stdlib.h>

   3:  #include <string.h>

   4:  #include <sys/types.h>/          * See NOTES * *

   5:  #include <sys/socket.h>

   6:  #include <netinet/in .h>

   7:  #include <arpa/inet.h>

   8:  #include <libubox/usock.h>

   9:  

  Ten:  int main ()

One   :  {

  :      struct sockaddr_in cli_addr;

  :      sizeof(struct sockaddr);

+   :      int type = usock_tcp | Usock_server  | usock_nocloexec | Usock_ipv4only;

  :      constchar"Carradio";

  :      constchar"8000";

  :      char recv_buf[1024] = {0};

  :      int connect_fd, u_fd = Usock (type, host, service);    

  :      if (u_fd < 0) {

  :          perror ("Usock");

+   :          return -1;

  :      }

  :  while     (1) {

  :          connect_fd = Accept (u_fd, (struct sockaddr *) (&CLI_ADDR), &len);

  :          if (connect_fd < 0) {

  :              perror ("accept");

+   :              return -1;

  :          }

  :          printf ("client_addr:%s\n", Inet_ntoa (CLI_ADDR.SIN_ADDR));

  :          recv (CONNECT_FD, RECV_BUF, 1024, 0);

  :          printf ("recv%s\n", recv_buf);

  :          Close (CONNECT_FD);

  :      }

  34:      

  :      return 0;

  :  }

  Panax Notoginseng  :

Client code:

   1:  #include <stdio.h>

   2:  #include <stdlib.h>

   3:  #include <string.h>

   4:  #include <sys/types.h>/          * See NOTES * *

   5:  #include <sys/socket.h>

   6:  

   7:  

   8:  int main ()

   9:  {

  :      struct sockaddr cli_addr;

One   :      sizeof(struct sockaddr);

  :      int type = usock_tcp  | usock_nocloexec | Usock_ipv4only;

  :      constchar"Carradio";

  :      constchar"8000";

  :      char recv_buf[1024] = {0};

  :      int c_fd = Usock (type, host, service);    / * Create a linker socket*/

  :      if (c_fd < 0) {

  :          perror ("Usock");

  :          return -1;

  :      }

  :      "HelloWorld", 10, 0);

  :      Sleep (10);

  :      Close (C_FD);

  :      return 0;

  25:  

Makefile File:

   1:  include $ (topdir)/rules.mk

   2:  

   3:  Pkg_name:=usocket

   4:  pkg_release:=1.0.0

   5:  

   6:  pkg_build_dir:=$ (build_dir)/$ (pkg_name)

   7:  

   8:  include $ (include_dir)/package.mk

   9:  

  Ten:  define package/$ (Pkg_name)

One   :      category:=utilities

  :      Submenu:=demo

  £      depends:=+libubox

  :      title:= usocket test Project.

  :  endef

  :  

  :  define package/$ (Pkg_name)/description

  :  If You can ' t figure out what the This program    does, you 're probably

  :      Brain-dead and need immediate medical attention.

  :  endef

  £ º  

  :  

At   :  define Build/prepare

  :      mkdir-p $ (pkg_build_dir)

  :      $ (CP)./src/* $ (pkg_build_dir)/

Endef   :  

  :  

  :  define package/$ (Pkg_name)/install

  :      $ (install_dir) $ (1)/bin

  :      $ (install_bin) $ (pkg_build_dir)/userver $ (1)/bin/

  :      $ (install_bin) $ (pkg_build_dir)/uclient $ (1)/bin/

  :  endef

  :  

  :  $ (eval $ (call buildpackage,$ (Pkg_name)))

  :  

  £ º  

The above code is a simple TCP test code run result: Client_addr:192.168.2.254recv HelloWorld

Libubox components (1)--usock