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

@@ -7,6 +7,7 @@
 #include "log.h"
 
 #ifdef __WINDOWS__
+# include <ws2tcpip.h>
   typedef int socklen_t;
   typedef SOCKET sc_raw_socket;
 #else
@@ -225,3 +226,15 @@ 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;
+}

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