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Drop packets with bad length (too small)

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Adrien Gallouët
2017-01-05 16:44:57 +00:00
parent 7779e61c15
commit 4988479df4
1 changed files with 3 additions and 1 deletions
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2
src/ip.h
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@@ -30,7 +30,9 @@ ip_get_common(struct ip_common *ic, const uint8_t *data, size_t size)
ic->proto = data[9]; ic->proto = data[9];
ic->hdr_size = (data[0] & 0xF) << 2; ic->hdr_size = (data[0] & 0xF) << 2;
ic->size = ((data[2] << 8) | data[3]); ic->size = ((data[2] << 8) | data[3]);
if (ic->size >= 20)
return 0; return 0;
break;
case 6: case 6:
ic->tc = ((data[0] & 0xF) << 4) | (data[1] >> 4); ic->tc = ((data[0] & 0xF) << 4) | (data[1] >> 4);
ic->proto = data[6]; ic->proto = data[6];