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/* posix */
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#include <sys/types.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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/* socket extensions */
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <sys/un.h>
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int
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rresvport(int *p)
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{
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	int fd;
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	short i;
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	struct	sockaddr_in in;
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	static int next;
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	fd = socket(PF_INET, SOCK_STREAM, 0);
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	if(fd < 0)
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		return -1;
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	i = 600 + ((getpid()+next++)%(1024-600));
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	memset(&in, 0, sizeof(in));
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	in.sin_family = AF_INET;
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	in.sin_port = htons(i);
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printf("in.sin_port = %d\n", in.sin_port);
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	if(bind(fd, &in, sizeof(in)) < 0){
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		close(fd);
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		return -1;
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	}
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	if(p)
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		*p = i;
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	return fd;
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}