32 lines
565 B
C
32 lines
565 B
C
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#include <string.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <ifaddrs.h>
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#include "sock.h"
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int sock_getbroadcastaddr(const struct sockaddr * addr,struct sockaddr * broadcastaddr)
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{
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struct ifaddrs *ifap,*ifa;
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if ( getifaddrs(&ifap)==-1)
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return 0;
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int rc=0;
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for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
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if (sock_cmpaddr(addr,ifa->ifa_addr,0))
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continue;
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memcpy (broadcastaddr, ifa->ifa_broadaddr, sock_addrlen(ifa->ifa_broadaddr));
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rc=1;
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break;
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}
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freeifaddrs(ifap);
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return rc;
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}
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