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#include <unistd.h>
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#include "socket.h"
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#include "ndelay.h"
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int socket_tcp4(void) {
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int s=socket_tcp4b();
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if (s==-1) return -1;
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if (ndelay_on(s) == -1) { close(s); return -1; }
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return s;
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}
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