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authorBaruch Siach <baruch@tkos.co.il>2020-05-20 13:31:41 +0300
committerTom Rini <trini@konsulko.com>2020-06-12 13:17:23 -0400
commitf1d925d9c39628d346b3809408695cd5c8b8faa2 (patch)
tree48fcd8954ca5d99a1b0e834d24031fbc353bf762 /net/dns.c
parent0813921042c363a9c591454144226e67ed21a223 (diff)
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net: move random_port() to dns
The random_port() routine is not used anywhere else. Make it local to dns.c to reduce code clutter, and shrink generated code a little. Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Diffstat (limited to 'net/dns.c')
-rw-r--r--net/dns.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/net/dns.c b/net/dns.c
index e35c4dc..5b1fe5b 100644
--- a/net/dns.c
+++ b/net/dns.c
@@ -36,6 +36,16 @@ char *net_dns_env_var; /* The envvar to store the answer in */
static int dns_our_port;
+/*
+ * make port a little random (1024-17407)
+ * This keeps the math somewhat trivial to compute, and seems to work with
+ * all supported protocols/clients/servers
+ */
+static unsigned int random_port(void)
+{
+ return 1024 + (get_timer(0) % 0x4000);
+}
+
static void dns_send(void)
{
struct header *header;