嵌入式 hi3518c本地udp套接示例以及sendto用法

/*

Author : kj

Time :2013-12-24 22:05

Notice :

在一个.c中定义的全局变量，需要在其他.c中使用的话，需要的是在使用的.c中

extern struct sockaddr_un server_address_udp;

*/

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#define SOCK_UNIX_VIDEO_STREAM_FILE_SEVER "/tmp/video1_server"
#define SOCK_UNIX_VIDEO_STREAM_FILE_CLIENT "/tmp/video1_client"

int video_stream_net_func_udp(void)
{
#if 0
int server_sockfd;

//unlink (SOCK_UNIX_VIDEO_STREAM_FILE_SEVER);//delete the file link for the function of bind

server_sockfd = socket (AF_UNIX, SOCK_DGRAM, 0);

server_address_udp.sun_family = AF_UNIX;
//server_address_udp.sin_port=htons(PORT);

strcpy (server_address_udp.sun_path, SOCK_UNIX_VIDEO_STREAM_FILE_SEVER);

joseph_ipnc_s_socket.joseph_ipnc_s_socket_fd_udp_socket_size = sizeof (server_address_udp);

//bind (server_sockfd, (struct sockaddr *)&server_address_udp, server_len);

joseph_ipnc_s_socket.joseph_ipnc_s_socket_fd_udp = 0;
joseph_ipnc_s_socket.joseph_ipnc_s_socket_fd_udp = server_sockfd;

printf("%s %d The udp mode send to jss succeed ,joseph_ipnc_s_socket_fd_udp is %d !\n",__FUNCTION__,__LINE__,joseph_ipnc_s_socket.joseph_ipnc_s_socket_fd_udp);
#else
int client_sockfd, ret;
//struct sockaddr_un pmmanager_addr, pmapi_addr;

client_sockfd = socket(AF_UNIX, SOCK_DGRAM, 0);
if(client_sockfd == -1)
{
perror("cannot create pmapi fd.");
}
unlink(SOCK_UNIX_VIDEO_STREAM_FILE_CLIENT); //configure pmapi's addr
memset(&server_address_client, 0, sizeof(server_address_client));
server_address_client.sun_family = AF_UNIX;
strcpy(server_address_client.sun_path, SOCK_UNIX_VIDEO_STREAM_FILE_CLIENT); //bind pmapi_fd to pmapi_addr
ret = bind(client_sockfd, (struct sockaddr*)&server_address_client, SUN_LEN(&server_address_client));
if(ret == -1)
{
perror("bind error.");
}

//configure pmmanager's addr
memset(&server_address_udp, 0, sizeof(server_address_udp));
server_address_udp.sun_family = AF_UNIX;
strcpy(server_address_udp.sun_path, SOCK_UNIX_VIDEO_STREAM_FILE_SEVER);

joseph_ipnc_s_socket.joseph_ipnc_s_socket_fd_udp = 0;
joseph_ipnc_s_socket.joseph_ipnc_s_socket_fd_udp = client_sockfd;

joseph_personal_video_print("%s %d The udp mode send to jss succeed ,joseph_ipnc_s_socket_fd_udp is %d !\n",__FUNCTION__,__LINE__,joseph_ipnc_s_socket.joseph_ipnc_s_socket_fd_udp);

#endif
return 0;
}

/*
int sendto ( socket s , const void * msg, int len, unsigned int flags, const struct sockaddr * to , int tolen ) ;
sendto(sockfd, buffer, len, 0, (struct addr*)&addr, addr_len); ±
*/

s_length = sendto(joseph_ipnc_s_socket.joseph_ipnc_s_socket_fd_udp, video_buf, video_length, 0,(struct sockaddr*)&server_address_udp,sizeof(struct sockaddr));