37 lines
715 B
C
37 lines
715 B
C
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <linux/in.h>
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int main (int argc, char *argv[])
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{
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int s, len, o, port = 6666;
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char buf[512];
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struct sockaddr_in addr;
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int addr_len = sizeof addr;
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if (argc > 1)
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port = atoi (argv[1]);
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s = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
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o = 1;
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len = 4;
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setsockopt (3, SOL_SOCKET, SO_REUSEADDR, &o, len);
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addr.sin_family = AF_INET;
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addr.sin_port = htons (port);
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addr.sin_addr.s_addr = INADDR_ANY; /* receive broadcasts */
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bind (s, (struct sockaddr *) &addr, sizeof addr);
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for (;;) {
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len = recvfrom (s, buf, sizeof buf, 0, (struct sockaddr *) &addr, &addr_len);
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if (len < 0)
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break;
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write (1, buf, len);
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}
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return 0;
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}
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