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Make ClientHello ignore --max-payload limits

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Receive TLS ClientHello despite max-payload limit set, to get all
the benefits of the option (decreased CPU consumption) but still
handle all TLS connections, including Kyber.
This commit is contained in:
ValdikSS 2024-07-31 12:23:37 +03:00
parent d031ae65bf
commit 60dd3cb004
1 changed files with 4 additions and 1 deletions
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5
src/goodbyedpi.c
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@ -221,7 +221,10 @@ static void add_ip_id_str(int id) {
static void add_maxpayloadsize_str(unsigned short maxpayload) {
char *newstr;
/* 0x47455420 is "GET ", 0x504F5354 is "POST", big endian. */
const char *maxpayloadsize_str = "and (tcp.PayloadLength ? tcp.PayloadLength < %hu or tcp.Payload32[0] == 0x47455420 or tcp.Payload32[0] == 0x504F5354 : true)";
const char *maxpayloadsize_str =
"and (tcp.PayloadLength ? tcp.PayloadLength < %hu " \
"or tcp.Payload32[0] == 0x47455420 or tcp.Payload32[0] == 0x504F5354 " \
"or (tcp.Payload[0] == 0x16 and tcp.Payload[1] == 0x03 and tcp.Payload[2] <= 0x03): true)";
char *addfilter = malloc(strlen(maxpayloadsize_str) + 16);
sprintf(addfilter, maxpayloadsize_str, maxpayload);