vxworks中如何实现BroadCast

#include <stdio.h>   /* pritnf() */#include <stdLib.h>  /* malloc() */#include <sockLib.h> /* socket() */#include <inetLib.h> /* struct sockaddr_in */#define HOST_PORT 60000#define MIN_SIZE  10#define MIN_TIMES 10void broadServer (int port, int size, int times){    struct sockaddr_in localAddr;    struct sockaddr_in peerAddr;    int   addrSize = sizeof(struct sockaddr);    int   opt = 1;    int   fd;    int   num;    char *buffer;    if(port  <= 2000) port  = HOST_PORT;    if(size  <= 0)    size  = MIN_SIZE;    if(times <= 0)    times = MIN_TIMES;    printf (">, size, port);        /* 打开Socket */    fd = socket (AF_INET, SOCK_DGRAM, 0);        /* 指定本地地址信息 */    localAddr.sin_family      = AF_INET;    localAddr.sin_port        = htons (port);    localAddr.sin_addr.s_addr = INADDR_ANY;    bind (fd, (struct sockaddr *)&localAddr, sizeof(struct sockaddr));    /* 加入广播 */    setsockopt(fd, SOL_SOCKET, SO_BROADCAST, (char *)&opt, sizeof(int));    buffer = (char *)malloc (size);    while ((times--)>0)        {        /* 接收广播数据 */        num = recvfrom (fd, buffer, size, 0,                        (struct sockaddr *)&peerAddr, &addrSize);        if (num < 0) break;        printf (" broadServer: recv %d chars from %s\n",                   num, inet_ntoa(peerAddr.sin_addr));        }    /* 关闭Socket */    close (fd);    free (buffer);    printf (" broadServer: end\n");    }

#include <stdio.h>   /* pritnf() */#include <stdLib.h>  /* malloc() */#include <sockLib.h> /* socket() */#include <inetLib.h> /* struct sockaddr_in */#define HOST_PORT 60000#define MIN_SIZE  1#define MIN_TIMES 1void broadClient (int port, int size, int times){    struct sockaddr_in serverAddr;    int   opt = 1;    int   fd;       char *buffer;    int   num;        if(port <= 2000) port = HOST_PORT;    if(size <= 0)    size = MIN_SIZE;    if(times<= 0)    times= MIN_TIMES;    buffer = (char *)malloc(size);    for(num=0; num<size; num++) buffer[num] = (num%26)+'a';    /* 服务器地址信息 */    serverAddr.sin_family      = AF_INET;    serverAddr.sin_port        = htons (port);    serverAddr.sin_addr.s_addr = htonl(INADDR_BROADCAST);    printf (" broadClient: try to send %d chars %d times to %s:%d\n",              size, times, inet_ntoa(serverAddr.sin_addr), port);    /* 打开Socket */    fd = socket (AF_INET, SOCK_DGRAM, 0);    while ((times--)>0)        {        /* 发送数据到BroadCast Server */        num = sendto(fd, buffer, size, 0,                     (struct sockaddr *)&serverAddr, sizeof(struct sockaddr));        printf (" broadClient: send %d chars\n", num);        }    /* 关闭Socket */    close (fd);    free (buffer);    printf (" broadClient: send finished\n");    }