Add support for SO_REUSEADDR

[This introduces some new API functions.]

* Adds new flag to the connection context indicating SO_REUSEADDR
  should be set.
* Adds max number of retries constant for when connect() hits
  EADDRNOTAVAIL.
* Adds new function, redisAsyncConnectBindWithReuse(), letting
  clients enable this functionality.

[Removed trailing whitespace in new header lines.]

Closes #264

1 files changed, 9 insertions, 0 deletions

diff --git a/hiredis.c b/hiredis.c
index 4dfd863..be67658 100644
--- a/hiredis.c
+++ b/hiredis.c
@@ -1123,6 +1123,15 @@ redisContext *redisConnectBindNonBlock(const char *ip, int port,
     return c;
 }
 
+redisContext *redisConnectBindNonBlockWithReuse(const char *ip, int port,
+                                                const char *source_addr) {
+    redisContext *c = redisContextInit();
+    c->flags &= ~REDIS_BLOCK;
+    c->flags |= REDIS_REUSEADDR;
+    redisContextConnectBindTcp(c,ip,port,NULL,source_addr);
+    return c;
+}
+
 redisContext *redisConnectUnix(const char *path) {
     redisContext *c;