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tpws: block connections to 127.0.0.0/8

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bol-van
2021-03-19 10:55:20 +03:00
parent 638a27c181
commit 94405e89c3
11 changed files with 10 additions and 2 deletions
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11
tpws/helpers.c
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@@ -75,7 +75,10 @@ void print_sockaddr(const struct sockaddr *sa)
bool check_local_ip(const struct sockaddr *saddr)
{
struct ifaddrs *addrs,*a;
if (saddr->sa_family==AF_INET && is_localnet((struct sockaddr_in *)saddr))
return true;
if (getifaddrs(&addrs)<0) return false;
a = addrs;
@@ -150,7 +153,11 @@ bool saconvmapped(struct sockaddr_storage *a)
return false;
}
bool is_linklocal(const struct sockaddr_in6* a)
bool is_localnet(const struct sockaddr_in *a)
{
return (htonl(a->sin_addr.s_addr)>>24)==127;
}
bool is_linklocal(const struct sockaddr_in6 *a)
{
// fe80::/10
return a->sin6_addr.s6_addr[0]==0xFE && (a->sin6_addr.s6_addr[1] & 0xC0)==0x80;

1
tpws/helpers.h
View File

@@ -21,6 +21,7 @@ uint16_t saport(const struct sockaddr *sa);
// true = was converted
bool saconvmapped(struct sockaddr_storage *a);
bool is_localnet(const struct sockaddr_in *a);
bool is_linklocal(const struct sockaddr_in6* a);
bool is_private6(const struct sockaddr_in6* a);