From d290b442480c460f747ad7df069c35c4e2a52ee7 Mon Sep 17 00:00:00 2001
From: RipleyTom <RipleyTom@users.noreply.github.com>
Date: Thu, 18 Nov 2021 01:02:53 +0100
Subject: [PATCH] Add function to parse IPv4 addresses

PR #2807 <https://github.com/Genymobile/scrcpy/pull/2807>

Signed-off-by: Romain Vimont <rom@rom1v.com>
---
 app/src/util/net.c | 17 +++++++++++++++++
 app/src/util/net.h |  6 ++++++
 2 files changed, 23 insertions(+)

diff --git a/app/src/util/net.c b/app/src/util/net.c
index 8595bc7950..b58ef3c318 100644
--- a/app/src/util/net.c
+++ b/app/src/util/net.c
@@ -1,3 +1,7 @@
+// For inet_pton() on Windows
+#define _WIN32_WINNT 0x0600
+#define WINVER 0x0600
+
 #include "net.h"
 
 #include <assert.h>
@@ -7,6 +11,7 @@
 #include "log.h"
 
 #ifdef __WINDOWS__
+# include <ws2tcpip.h>
   typedef int socklen_t;
   typedef SOCKET sc_raw_socket;
 #else
@@ -225,3 +230,15 @@ net_close(sc_socket socket) {
     return !close(raw_sock);
 #endif
 }
+
+bool
+net_parse_ipv4(const char *s, uint32_t *ipv4) {
+    struct in_addr addr;
+    if (!inet_pton(AF_INET, s, &addr)) {
+        LOGE("Invalid IPv4 address: %s", s);
+        return false;
+    }
+
+    *ipv4 = ntohl(addr.s_addr);
+    return true;
+}
diff --git a/app/src/util/net.h b/app/src/util/net.h
index 57fd6c5e52..15979cf934 100644
--- a/app/src/util/net.h
+++ b/app/src/util/net.h
@@ -68,4 +68,10 @@ net_interrupt(sc_socket socket);
 bool
 net_close(sc_socket socket);
 
+/**
+ * Parse `ip` "xxx.xxx.xxx.xxx" to an IPv4 host representation
+ */
+bool
+net_parse_ipv4(const char *ip, uint32_t *ipv4);
+
 #endif