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Fix #40

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This commit is contained in:
Vadim Vetrov
2024-08-08 15:29:04 +03:00
parent 22573b7d12
commit fb47d80543
5 changed files with 50 additions and 15 deletions
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35
mangle.c
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@@ -285,10 +285,6 @@ int tcp4_frag(const __u8 *pkt, __u32 buflen, __u32 payload_offset,
#define TLS_EXTENSION_SNI 0x0000
#define TLS_EXTENSION_CLIENT_HELLO_ENCRYPTED 0xfe0d
const char googlevideo_ending[] = "googlevideo.com";
const int googlevideo_len = 15;
typedef __u8 uint8_t;
typedef __u32 uint32_t;
typedef __u16 uint16_t;
@@ -401,19 +397,33 @@ struct verdict analyze_tls_data(
if (sni_ext_ptr + sni_len > sni_ext_end) break;
char *sni_name = (char *)sni_ext_ptr;
// sni_len
vrd.sni_offset = (uint8_t *)sni_name - data;
vrd.sni_len = sni_len;
char *gv_startp = sni_name + sni_len - googlevideo_len;
if (sni_len >= googlevideo_len &&
sni_len < 128 &&
!strncmp(gv_startp,
googlevideo_ending,
googlevideo_len)) {
if (config.all_domains) {
vrd.target_sni = 1;
goto out;
}
vrd.gvideo_hello = 1;
unsigned int j = 0;
for (unsigned int i = 0; i < config.domains_strlen; i++) {
if (config.domains_str[i] == ',' || config.domains_str[i] == '\n') {
unsigned int domain_len = (i - j);
const char *sni_startp = sni_name + sni_len - domain_len;
const char *domain_startp = config.domains_str + j;
if (sni_len >= domain_len &&
sni_len < 128 &&
!strncmp(sni_startp,
domain_startp,
domain_len)) {
vrd.target_sni = 1;
}
j = i + 1;
}
}
nextExtension:
@@ -423,6 +433,7 @@ nextMessage:
i += 5 + message_length;
}
out:
return vrd;
}