[PATCH] linux_inet_diag: fix Wshorten-64-to-32 warnings

[Eric Wong <e@80x24.org>]

POSIX and glibc 2.2+ declare the hostlen and servlen
args of getnameinfo(3) to be socklen_t, not size_t,
so favor socklen_t for those calculations.

While we're at it, nlmsg_len is u32, too, so cast it
as such to avoid the warning.

Tested on clang version 3.5-1ubuntu1 on x86-64
---
 ext/raindrops/linux_inet_diag.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/ext/raindrops/linux_inet_diag.c b/ext/raindrops/linux_inet_diag.c
index 5f21295..35bb127 100644
--- a/ext/raindrops/linux_inet_diag.c
+++ b/ext/raindrops/linux_inet_diag.c
@@ -232,8 +232,8 @@ static struct listen_stats *stats_for(st_table *table, struct inet_diag_msg *r)
 	char *key, *port, *old_key;
 	size_t alloca_len;
 	struct listen_stats *stats;
-	size_t keylen;
-	size_t portlen = sizeof("65535");
+	socklen_t keylen;
+	socklen_t portlen = (socklen_t)sizeof("65535");
 	union any_addr sa;
 	socklen_t len = sizeof(struct sockaddr_storage);
 	int rc;
@@ -274,8 +274,8 @@ static struct listen_stats *stats_for(st_table *table, struct inet_diag_msg *r)
 		*key = 0;
 	}
 
-	keylen = strlen(key);
-	portlen = strlen(port);
+	keylen = (socklen_t)strlen(key);
+	portlen = (socklen_t)strlen(port);
 
 	switch (sa.ss.ss_family) {
 	case AF_INET:
@@ -396,8 +396,8 @@ static void prep_diag_args(
 
 	nladdr->nl_family = AF_NETLINK;
 
-	req->nlh.nlmsg_len = sizeof(struct diag_req) +
-	                    RTA_LENGTH(args->iov[2].iov_len);
+	req->nlh.nlmsg_len = (unsigned int)(sizeof(struct diag_req) +
+	                    RTA_LENGTH(args->iov[2].iov_len));
 	req->nlh.nlmsg_type = TCPDIAG_GETSOCK;
 	req->nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST;
 	req->nlh.nlmsg_pid = getpid();
-- 
EW