大庆建设网站表格下载,做国外网站有哪些,百度输入法,进入公众号即弹出图文非命名的UNIX域套接字 第1个参数domain#xff0c;表示协议族#xff0c;只能为AF_LOCAL或者AF_UNIX#xff1b; 第2个参数type#xff0c;表示类型#xff0c;只能为0。 第3个参数protocol#xff0c;表示协议#xff0c;可以是SOCK_STREAM或者SOCK_DGRAM。用SOCK_STR…非命名的UNIX域套接字 第1个参数domain表示协议族只能为AF_LOCAL或者AF_UNIX 第2个参数type表示类型只能为0。 第3个参数protocol表示协议可以是SOCK_STREAM或者SOCK_DGRAM。用SOCK_STREAM建立的套接字对是管道流与一般的管道相区别的是套接字对建立的通道是双向的即每一端都可以进行读写。不管是数据流还是数据报协议unix域套接字都是可靠的不丢包的。 第4个参数用于保存建立的套接字对。
示例
#include stdio.h
#include stdlib.h
#include sys/socket.h
#include string.h
#include sys/types.h
#include unistd.hint main(void)
{ int i_fd_arr[2]; int i_pid; char psz_wbuf[16] 0123456789;char psz_rbuf[16] {0};if ( socketpair( AF_UNIX, SOCK_STREAM, 0, i_fd_arr ) 0 ) { perror( socketpair );return -1;}if ( ( i_pid fork() ) 0 ) { perror( fork );return -1;} else if ( 0 i_pid ) { //child close( i_fd_arr[0] ); if ( write( i_fd_arr[1], psz_wbuf, strlen( psz_wbuf ) ) 0 ) {perror( write );exit( -1 );}memset( psz_rbuf, 0, sizeof( psz_rbuf ) );if ( read( i_fd_arr[1], psz_rbuf, 16 ) 0 ) {perror( read );exit( -1 );}printf( child read: %s\n, psz_rbuf );}else{ //parent close( i_fd_arr[1] ); if ( read( i_fd_arr[0], psz_rbuf, 16 ) 0 ) {perror( read );exit( -1 );}printf( parent read: %s\n, psz_rbuf );memset( psz_wbuf, 0, sizeof( psz_wbuf ) );strncpy( psz_wbuf, 9876543210, sizeof( psz_wbuf ) - 1 );if ( write( i_fd_arr[0], psz_wbuf, strlen( psz_wbuf ) ) 0 ) {perror( write );exit( -1 );}}return 0;
} 命名UNIX域套接字 TCP示例
server.c
#include stdio.h
#include sys/socket.h
#include sys/un.h
#include string.h
#include unistd.hint main(void)
{ int i_listenfd 0, i_clientfd 0; struct sockaddr_un addr_server, addr_client; char psz_path[32] ./server_unixsocket_file;int i_caddr_len sizeof(struct sockaddr_un); int i_saddr_len sizeof(struct sockaddr_un); char psz_rbuf[32] {0}; char psz_wbuf[32] i am server.;int i_readlen 0;//create a UNIX domain stream socket if ( ( i_listenfd socket( AF_UNIX, SOCK_STREAM, 0 ) ) 0 ) { perror( socket );return -1;}//in case it already exists unlink( psz_path ); //fill in socket address structure memset( addr_server, 0, sizeof( addr_server ) ); addr_server.sun_family AF_UNIX;strncpy( addr_server.sun_path, psz_path, sizeof( addr_server.sun_path ) - 1 ); //bind the name to the descriptorif ( bind( i_listenfd, ( struct sockaddr * )addr_server, i_saddr_len ) 0 ) {perror( bind ); return -1; } if ( listen( i_listenfd, 10 ) 0 ){ perror( listen );return -1;} while(1){if ( ( i_clientfd accept( i_listenfd, ( struct sockaddr * )addr_client,( socklen_t * )i_caddr_len ) ) 0 ) { perror(accept);return -1;} printf( client is: %s\n, addr_client.sun_path ); if ( ( i_readlen read( i_clientfd, psz_rbuf, sizeof( psz_rbuf ) - 1 ) ) 0 ){perror( read );return -1;}psz_rbuf[i_readlen] \0;printf( receive msg:%s\n, psz_rbuf ); if ( write( i_clientfd, psz_wbuf, strlen( psz_wbuf ) 1 ) 0 ) { perror(write); return -1; }}unlink( psz_path ); return 0;
} client.c
#include stdio.h
#include sys/un.h
#include sys/socket.h
#include string.h
#include unistd.hint main(void)
{ int i_fd 0; struct sockaddr_un addr; char psz_path[32] ./client_unixsocket_file; char serverpath[32] ./server_unixsocket_file; int i_addr_len sizeof( struct sockaddr_un ); char psz_wbuf[32] i am client.;char psz_rbuf[32] {0}; int i_readlen 0;if ( ( i_fd socket( AF_UNIX, SOCK_STREAM, 0 ) ) 0 ) { perror(socket);return -1;}memset( addr, 0, sizeof( addr ) ); addr.sun_family AF_UNIX;strncpy( addr.sun_path, psz_path, sizeof( addr.sun_path ) - 1 ); unlink( psz_path );if ( bind( i_fd, ( struct sockaddr * )addr, i_addr_len ) 0 ) { perror(bind);return -1;}//fill socket adress structure with servers address memset( addr, 0, sizeof( addr ) ); addr.sun_family AF_UNIX;strncpy( addr.sun_path, serverpath, sizeof( addr.sun_path ) - 1 ); if ( connect( i_fd, ( struct sockaddr * )addr, i_addr_len ) 0 ) {perror(connect);return -1;}if ( write( i_fd, psz_wbuf, strlen( psz_wbuf ) 1 ) 0 ) {perror( write ); return -1;} if ( ( i_readlen read( i_fd, psz_rbuf, sizeof( psz_rbuf ) - 1 ) ) 0 ) { perror(write); return -1; }psz_rbuf[i_readlen] \0;printf( receive msg:%s\n, psz_rbuf ); unlink( psz_path );return -1;
} UDP示例 server
#include stdio.h
#include sys/socket.h
#include sys/un.h
#include string.h
#include unistd.h int main(void)
{ int i_listenfd 0/*, i_clientfd 0*/; struct sockaddr_un addr_server, addr_client; char psz_path[32] ./server_unixsocket_file; int i_caddr_len sizeof(struct sockaddr_un); int i_saddr_len 0; char psz_rbuf[32] {0}; char psz_wbuf[32] i am server.; int i_readlen 0; //create a UNIX domain stream socket if ( ( i_listenfd socket( AF_UNIX, SOCK_DGRAM, 0 ) ) 0 ) { perror( socket ); return -1; } //in case it already exists unlink( psz_path ); //fill in socket address structure memset( addr_server, 0, sizeof( addr_server ) ); addr_server.sun_family AF_UNIX; strncpy( addr_server.sun_path, psz_path, sizeof( addr_server.sun_path ) - 1 ); //bind the name to the descriptor i_saddr_len strlen( addr_server.sun_path ) sizeof( addr_server.sun_family ); if ( bind( i_listenfd, ( struct sockaddr * )addr_server, i_saddr_len ) 0 ) { perror( bind ); return -1; } while(1) { i_readlen recvfrom( i_listenfd, psz_rbuf, sizeof( psz_rbuf ) - 1, 0, ( struct sockaddr * )addr_client, ( socklen_t *)i_caddr_len ); if ( i_readlen 0 ) { perror( read ); return -1; } printf( client is: %s\n, addr_client.sun_path );psz_rbuf[i_readlen] \0; printf( receive msg:%s\n, psz_rbuf ); if ( sendto( i_listenfd, psz_wbuf, strlen( psz_wbuf ) 1, 0, ( struct sockaddr * )addr_client, i_caddr_len ) 0 ) { perror( write ); return -1; } } unlink( psz_path ); return 0;
} Client
#include stdio.h
#include sys/un.h
#include sys/socket.h
#include string.h
#include unistd.hint main(void)
{ int i_fd 0; struct sockaddr_un addr; char psz_clientpath[32] ./client_unixsocket_file; char psz_serverpath[32] ./server_unixsocket_file; int i_addr_len 0; char psz_wbuf[32] i am client.;char psz_rbuf[32] {0}; int i_readlen 0;if ( ( i_fd socket( AF_UNIX, SOCK_DGRAM, 0 ) ) 0 ) { perror(socket);return -1;}memset( addr, 0, sizeof( addr ) ); addr.sun_family AF_UNIX;strncpy( addr.sun_path, psz_clientpath, sizeof( addr.sun_path ) - 1 ); unlink( psz_clientpath );i_addr_len strlen( addr.sun_path ) sizeof( addr.sun_family );if ( bind( i_fd, ( struct sockaddr * )addr, i_addr_len ) 0 ) { perror(bind);return -1;}//fill socket adress structure with servers address memset( addr, 0, sizeof( addr ) ); addr.sun_family AF_UNIX;strncpy( addr.sun_path, psz_serverpath, sizeof( addr.sun_path ) - 1 ); i_addr_len strlen( addr.sun_path ) sizeof( addr.sun_family ); if ( sendto( i_fd, psz_wbuf, strlen( psz_wbuf ) 1, 0,( struct sockaddr * )addr, i_addr_len ) 0 ) {perror( write ); return -1;} if ( ( i_readlen recvfrom( i_fd, psz_rbuf, sizeof( psz_rbuf ) - 1, 0,( struct sockaddr * )addr, ( socklen_t * )i_addr_len ) ) 0 ) {perror(write); return -1; }psz_rbuf[i_readlen] \0;printf( receive msg:%s\n, psz_rbuf ); unlink( psz_clientpath );return -1;
} 示例代码抄录自https://blog.csdn.net/bytxl/article/details/47861469 用于加深理解
