diff options
| author | Azat Khuzhin <a3at.mail@gmail.com> | 2018-10-24 11:51:57 +0300 |
|---|---|---|
| committer | Azat Khuzhin <a3at.mail@gmail.com> | 2018-10-25 00:06:47 +0300 |
| commit | 117dc92129f16cbf8cc7e7d60898569ca20b597f (patch) | |
| tree | 6e9cd6169aa67b4f1b95cf9b658c22d5125b12d2 /evutil.c | |
| parent | 0ec12bc84cf09307e01dc3b00d08ac1f816b6ff7 (diff) | |
| download | libevent-117dc92129f16cbf8cc7e7d60898569ca20b597f.tar.gz | |
Filter link-local IPv4 addresses in evutil_found_ifaddr()
Fixes: #668
Diffstat (limited to 'evutil.c')
| -rw-r--r-- | evutil.c | 6 |
1 files changed, 6 insertions, 0 deletions
@@ -599,6 +599,11 @@ static int have_checked_interfaces, had_ipv4_address, had_ipv6_address; */ #define EVUTIL_V4ADDR_IS_LOCALHOST(addr) (((addr)>>24) == 127) +/* Macro: True iff the IPv4 address 'addr', in host order, is link-local + * 169.254.0.0/16 (RFC3927) + */ +#define EVUTIL_V4ADDR_IS_LINKLOCAL(addr) (((addr) & 0xffff0000U) == 0xa9fe0000U) + /* Macro: True iff the IPv4 address 'addr', in host order, is a class D * (multiclass) address. */ @@ -615,6 +620,7 @@ evutil_found_ifaddr(const struct sockaddr *sa) ev_uint32_t addr = ntohl(sin->sin_addr.s_addr); if (addr == 0 || EVUTIL_V4ADDR_IS_LOCALHOST(addr) || + EVUTIL_V4ADDR_IS_LINKLOCAL(addr) || EVUTIL_V4ADDR_IS_CLASSD(addr)) { /* Not actually a usable external address. */ } else { |