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Wipe the whole buffer containing the DNS name, not the size of its pointer
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@ -2023,7 +2023,7 @@ write_dns_nameenc(char *buf, size_t buflen, char *data, int datalen, char downen
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space = MIN(0xFF, buflen) - 4 - 2;
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/* -1 encoding type, -3 ".xy", -2 for safety */
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memset(buf, 0, sizeof(buf));
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memset(buf, 0, buflen);
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if (downenc == 'S') {
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buf[0] = 'i';
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