42 lines
713 B
C
42 lines
713 B
C
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#include <ctype.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <stdlib.h>
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int __inet_aton(const char *s0, struct in_addr *dest)
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{
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const char *s = s0;
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unsigned char *d = (void *)dest;
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unsigned long a[4] = { 0 };
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char *z;
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int i;
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for (i=0; i<4; i++) {
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a[i] = strtoul(s, &z, 0);
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if (z==s || (*z && *z != '.') || !isdigit(*s))
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return 0;
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if (!*z) break;
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s=z+1;
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}
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if (i==4) return 0;
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switch (i) {
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case 0:
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a[1] = a[0] & 0xffffff;
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a[0] >>= 24;
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case 1:
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a[2] = a[1] & 0xffff;
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a[1] >>= 16;
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case 2:
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a[3] = a[2] & 0xff;
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a[2] >>= 8;
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}
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for (i=0; i<4; i++) {
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if (a[i] > 255) return 0;
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d[i] = a[i];
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}
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return 1;
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}
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weak_alias(__inet_aton, inet_aton);
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