From 7edb0065ca986803dbf3d12b79d86bfba446b10a Mon Sep 17 00:00:00 2001
From: zfl9 <zfl9.com@gmail.com>
Date: Wed, 4 Mar 2020 21:49:42 +0800
Subject: use libev instead of libuv

---
 dnsudp2tcp.c |  54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 test         | Bin 0 -> 75832 bytes
 2 files changed, 54 insertions(+)
 create mode 100755 test

diff --git a/dnsudp2tcp.c b/dnsudp2tcp.c
index f76b9f9..b96ed30 100644
--- a/dnsudp2tcp.c
+++ b/dnsudp2tcp.c
@@ -94,6 +94,60 @@ static void udp_recv_cb(evloop_t *evloop, evio_t *watcher, int events);
 static void tcp_send_cb(evloop_t *evloop, evio_t *watcher, int events);
 static void tcp_recv_cb(evloop_t *evloop, evio_t *watcher, int events);
 
+static void set_nonblock(int sockfd) {
+    int flags = fcntl(sockfd, F_GETFL, 0);
+    if (flags < 0) {
+        LOGERR("[set_nonblock] fcntl(%d, F_GETFL) failed: (%d) %s", sockfd, errno, strerror(errno));
+        exit(errno);
+    }
+    if (fcntl(sockfd, F_SETFL, flags | O_NONBLOCK) < 0) {
+        LOGERR("[set_nonblock] fcntl(%d, F_SETFL) failed: (%d) %s", sockfd, errno, strerror(errno));
+        exit(errno);
+    }
+}
+
+static void set_ipv6only(int sockfd) {
+    if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, &(int){1}, sizeof(int)) < 0) {
+        LOGERR("[set_ipv6only] setsockopt(%d, IPV6_V6ONLY) failed: (%d) %s", sockfd, errno, strerror(errno));
+        exit(errno);
+    }
+}
+
+static void set_reuseaddr(int sockfd) {
+    if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &(int){1}, sizeof(int)) < 0) {
+        LOGERR("[set_reuseaddr] setsockopt(%d, SO_REUSEADDR) failed: (%d) %s", sockfd, errno, strerror(errno));
+        exit(errno);
+    }
+}
+
+static void set_reuseport(int sockfd) {
+    if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEPORT, &(int){1}, sizeof(int)) < 0) {
+        LOGERR("[set_reuseport] setsockopt(%d, SO_REUSEPORT) failed: (%d) %s", sockfd, errno, strerror(errno));
+        exit(errno);
+    }
+}
+
+static void set_nodelay(int sockfd) {
+    if (setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, &(int){1}, sizeof(int)) < 0) {
+        LOGERR("[set_nodelay] setsockopt(%d, TCP_NODELAY) failed: (%d) %s", sockfd, errno, strerror(errno));
+        exit(errno);
+    }
+}
+
+static void set_quickack(int sockfd) {
+    if (setsockopt(sockfd, IPPROTO_TCP, TCP_QUICKACK, &(int){1}, sizeof(int)) < 0) {
+        LOGERR("[set_quickack] setsockopt(%d, TCP_QUICKACK) failed: (%d) %s", sockfd, errno, strerror(errno));
+        exit(errno);
+    }
+}
+
+static void set_syncnt(int sockfd, int syncnt) {
+    if (setsockopt(sockfd, IPPROTO_TCP, TCP_SYNCNT, &syncnt, sizeof(syncnt)) < 0) {
+        LOGERR("[set_syncnt] setsockopt(%d, TCP_SYNCNT) failed: (%d) %s", sockfd, errno, strerror(errno));
+        exit(errno);
+    }
+}
+
 static int get_ipstr_family(const char *ipstr) {
     if (!ipstr) return -1; /* invalid */
     uint8_t ipaddr[16]; /* 16-bytes */
diff --git a/test b/test
new file mode 100755
index 0000000..ffdc283
Binary files /dev/null and b/test differ
-- 
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