diff options
Diffstat (limited to 'libglusterfs/src/common-utils.c')
| -rw-r--r-- | libglusterfs/src/common-utils.c | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/libglusterfs/src/common-utils.c b/libglusterfs/src/common-utils.c index 56f545f28de..2acd83f36cf 100644 --- a/libglusterfs/src/common-utils.c +++ b/libglusterfs/src/common-utils.c @@ -194,26 +194,16 @@ gf_rev_dns_lookup (const char *ip) { char *fqdn = NULL; int ret = 0; - struct sockaddr_in sa = {0}; - char host_addr[256] = {0, }; GF_VALIDATE_OR_GOTO ("resolver", ip, out); - sa.sin_family = AF_INET; - inet_pton (AF_INET, ip, &sa.sin_addr); - ret = getnameinfo ((struct sockaddr *)&sa, sizeof (sa), host_addr, - sizeof (host_addr), NULL, 0, 0); - + /* Get the FQDN */ + ret = gf_get_hostname_from_ip ((char *)ip, &fqdn); if (ret != 0) { gf_msg ("resolver", GF_LOG_INFO, errno, LG_MSG_RESOLVE_HOSTNAME_FAILED, "could not resolve " "hostname for %s", ip); - goto out; } - - /* Get the FQDN */ - fqdn = gf_strdup (host_addr); - out: return fqdn; } @@ -3127,11 +3117,13 @@ gf_get_hostname_from_ip (char *client_ip, char **hostname) char *client_ip_copy = NULL; char *tmp = NULL; char *ip = NULL; + size_t addr_sz = 0; /* if ipv4, reverse lookup the hostname to * allow FQDN based rpc authentication */ - if (valid_ipv4_address (client_ip, strlen (client_ip), 0) == _gf_false) { + if (!valid_ipv6_address (client_ip, strlen (client_ip), 0) && + !valid_ipv4_address (client_ip, strlen (client_ip), 0)) { /* most times, we get a.b.c.d:port form, so check that */ client_ip_copy = gf_strdup (client_ip); if (!client_ip_copy) @@ -3144,12 +3136,14 @@ gf_get_hostname_from_ip (char *client_ip, char **hostname) if (valid_ipv4_address (ip, strlen (ip), 0) == _gf_true) { client_sockaddr = (struct sockaddr *)&client_sock_in; + addr_sz = sizeof (client_sock_in); client_sock_in.sin_family = AF_INET; ret = inet_pton (AF_INET, ip, (void *)&client_sock_in.sin_addr.s_addr); } else if (valid_ipv6_address (ip, strlen (ip), 0) == _gf_true) { client_sockaddr = (struct sockaddr *) &client_sock_in6; + addr_sz = sizeof (client_sock_in6); client_sock_in6.sin6_family = AF_INET6; ret = inet_pton (AF_INET6, ip, @@ -3163,8 +3157,14 @@ gf_get_hostname_from_ip (char *client_ip, char **hostname) goto out; } + /* You cannot just use sizeof (*client_sockaddr), as per the man page + * the (getnameinfo) size must be the size of the underlying sockaddr + * struct e.g. sockaddr_in6 or sockaddr_in. Failure to do so will + * break IPv6 hostname resolution (IPv4 will work only because + * the sockaddr_in struct happens to be of the correct size). + */ ret = getnameinfo (client_sockaddr, - sizeof (*client_sockaddr), + addr_sz, client_hostname, sizeof (client_hostname), NULL, 0, 0); if (ret) { |