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Red Hat Bugzilla – Attachment 317073 Details for
Bug 458022
kernel: random32: seeding improvement [rhel-4.8]
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test case (generates script for octave + gnuplot)
udp.c (text/x-csrc), 901 bytes, created by
Vitaly Mayatskikh
on 2008-09-18 13:05:14 UTC
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Description:
test case (generates script for octave + gnuplot)
Filename:
MIME Type:
Creator:
Vitaly Mayatskikh
Created:
2008-09-18 13:05:14 UTC
Size:
901 bytes
patch
obsolete
>#include <stdio.h> >#include <errno.h> >#include <string.h> >#include <sys/types.h> >#include <sys/socket.h> >#include <netinet/in.h> > >#define PORTS 65536 > >int main() >{ > int s, err, i, j; > char buf[256]; > struct sockaddr_in sa; > int optval = 1, port; > unsigned int p[PORTS]; > > memset(p, 0, sizeof(int)*PORTS); > > for (i = 0; i < PORTS * 100; ++i) { > s = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP); > memset(&sa, 0, sizeof(sa)); > sa.sin_addr.s_addr = htonl(INADDR_ANY); > sa.sin_family = AF_INET; > sa.sin_port = 0; > setsockopt(s, IPPROTO_UDP, SO_REUSEADDR, &optval, sizeof(optval)); > err = bind(s, (const struct sockaddr*)&sa, sizeof(sa)); > getsockname(s, (struct sockaddr*)&sa, &j); > port = ntohs(sa.sin_port); > p[port]++; > close(s); > } > printf("x = 32767:1:65535;\ny = ["); > for (i = 32767; i < PORTS; i++) > printf("%d%s", p[i], (i + 1 < PORTS ? "; " : "")); > printf("];\nplot(x,y,'.');pause;"); >}
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