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-rw-r--r--src/ip.cpp18
1 files changed, 10 insertions, 8 deletions
diff --git a/src/ip.cpp b/src/ip.cpp
index b3ad610..77efd29 100644
--- a/src/ip.cpp
+++ b/src/ip.cpp
@@ -232,15 +232,15 @@ int zmq::resolve_ip_interface (sockaddr_storage* addr_, socklen_t *addr_len_,
addrinfo req;
memset (&req, 0, sizeof (req));
- // We don't care about family. IPv4 is as good as IPv6.
- req.ai_family = AF_UNSPEC;
+ // We only support IPv4 addresses for now.
+ req.ai_family = AF_INET;
// Arbitrary, not used in the output, but avoids duplicate results.
req.ai_socktype = SOCK_STREAM;
// Restrict hostname/service to literals to avoid any DNS lookups or
// service-name irregularity due to indeterminate socktype.
- req.ai_flags = AI_PASSIVE | AI_NUMERICHOST | AI_NUMERICSERV;
+ req.ai_flags = AI_PASSIVE | AI_NUMERICHOST | AI_NUMERICSERV;
// Resolve the literal address. Some of the error info is lost in case
// of error, however, there's no way to report EAI errors via errno.
@@ -280,16 +280,18 @@ int zmq::resolve_ip_hostname (sockaddr_storage *addr_, socklen_t *addr_len_,
addrinfo req;
memset (&req, 0, sizeof (req));
- // Don't specify the family. We want both IPv4 and IPv6.
- req.ai_family = AF_UNSPEC;
+ // We only support IPv4 addresses for now.
+ req.ai_family = AF_INET;
// Need to choose one to avoid duplicate results from getaddrinfo() - this
// doesn't really matter, since it's not included in the addr-output.
req.ai_socktype = SOCK_STREAM;
- // Avoid named services due to unclear socktype, and don't pick IPv6
- // addresses if we don't have a local IPv6 address configured.
- req.ai_flags = AI_NUMERICSERV | AI_ADDRCONFIG;
+ // Avoid named services due to unclear socktype, and don't pick IPv4
+ // addresses if we don't have a local IPv4 address configured.
+ // If this is failing for you on a host with only IPv6 connectivity,
+ // please contribute proper IPv6 support for all functions in this file.
+ req.ai_flags = AI_NUMERICSERV | AI_ADDRCONFIG;
// Resolve host name. Some of the error info is lost in case of error,
// however, there's no way to report EAI errors via errno.