ref: 7367b8d2e75301fb33830404b66ded43bbd56356
dir: /sys/src/ape/lib/bsd/rresvport.c/
/* posix */ #include <sys/types.h> #include <unistd.h> #include <stdlib.h> #include <stdio.h> #include <string.h> #include <time.h> /* socket extensions */ #include <sys/socket.h> #include <netinet/in.h> #include <sys/un.h> int rresvport(int *p) { int fd; short i; struct sockaddr_in in; static int next; fd = socket(PF_INET, SOCK_STREAM, 0); if(fd < 0) return -1; i = 600 + ((getpid()+next++)%(1024-600)); memset(&in, 0, sizeof(in)); in.sin_family = AF_INET; in.sin_port = htons(i); printf("in.sin_port = %d\n", in.sin_port); if(bind(fd, &in, sizeof(in)) < 0){ close(fd); return -1; } if(p) *p = i; return fd; }