diff --git a/extcap/androiddump.c b/extcap/androiddump.c
index b92c1705fc..031325294e 100644
--- a/extcap/androiddump.c
+++ b/extcap/androiddump.c
@@ -439,7 +439,7 @@ static socket_handle_t adb_connect(const char *server_ip, unsigned short *server
 static char *adb_send_and_receive(socket_handle_t sock, const char *adb_service,
         char *buffer, int buffer_length, gssize *data_length) {
     gssize   used_buffer_length;
-    gint32   length;
+    guint32  length;
     gssize   result;
     char     status[4];
     char     tmp_buffer;
@@ -471,7 +471,11 @@ static char *adb_send_and_receive(socket_handle_t sock, const char *adb_service,
     memcpy(status, buffer, 4);
     tmp_buffer = buffer[8];
     buffer[8] = '\0';
-    length = (gssize) g_ascii_strtoll(buffer + 4, NULL, 16);
+    if (!ws_hexstrtou32(buffer + 4, NULL, &length)) {
+        g_warning("Invalid reply length <%s> while reading reply for <%s>", buffer + 4, adb_service);
+
+        return NULL;
+    }
     buffer[8] = tmp_buffer;
 
     while (used_buffer_length < length + 8) {
diff --git a/wsutil/strtoi.c b/wsutil/strtoi.c
index 75d0cf3ff4..c855466d43 100644
--- a/wsutil/strtoi.c
+++ b/wsutil/strtoi.c
@@ -58,46 +58,6 @@ gboolean ws_strtoi64(const gchar* str, const gchar** endptr, gint64* cint)
 	return TRUE;
 }
 
-gboolean ws_strtou64(const gchar* str, const gchar** endptr, guint64* cint)
-{
-	gchar* end;
-	guint64 val;
-
-	if (str[0] == '-' || str[0] == '+') {
-		/*
-		 * Unsigned numbers don't have a sign.
-		 */
-		*cint = 0;
-		if (endptr != NULL)
-			*endptr = str;
-		errno = EINVAL;
-		return FALSE;
-	}
-	errno = 0;
-	val = g_ascii_strtoull(str, &end, 10);
-	if ((val == 0 && end == str) || (endptr == NULL && *end != '\0')) {
-		*cint = 0;
-		if (endptr != NULL)
-			*endptr = end;
-		errno = EINVAL;
-		return FALSE;
-	}
-	if (val == G_MAXUINT64 && errno == ERANGE) {
-		/*
-		 * Return the value, because ws_strtoi64() does.
-		 */
-		*cint = val;
-		if (endptr != NULL)
-			*endptr = end;
-		/* errno is already set */
-		return FALSE;
-	}
-	if (endptr != NULL)
-		*endptr = end;
-	*cint = val;
-	return TRUE;
-}
-
 #define DEFINE_WS_STRTOI_BITS(bits) \
 gboolean ws_strtoi##bits(const gchar* str, const gchar** endptr, gint##bits* cint) \
 { \
@@ -147,17 +107,67 @@ DEFINE_WS_STRTOI_BITS(32)
 DEFINE_WS_STRTOI_BITS(16)
 DEFINE_WS_STRTOI_BITS(8)
 
+static gboolean ws_basestrtou64(const gchar* str, const gchar** endptr, guint64* cint, int base)
+{
+	gchar* end;
+	guint64 val;
+
+	if (str[0] == '-' || str[0] == '+') {
+		/*
+		 * Unsigned numbers don't have a sign.
+		 */
+		*cint = 0;
+		if (endptr != NULL)
+			*endptr = str;
+		errno = EINVAL;
+		return FALSE;
+	}
+	errno = 0;
+	val = g_ascii_strtoull(str, &end, base);
+	if ((val == 0 && end == str) || (endptr == NULL && *end != '\0')) {
+		*cint = 0;
+		if (endptr != NULL)
+			*endptr = end;
+		errno = EINVAL;
+		return FALSE;
+	}
+	if (val == G_MAXUINT64 && errno == ERANGE) {
+		/*
+		 * Return the value, because ws_strtoi64() does.
+		 */
+		*cint = val;
+		if (endptr != NULL)
+			*endptr = end;
+		/* errno is already set */
+		return FALSE;
+	}
+	if (endptr != NULL)
+		*endptr = end;
+	*cint = val;
+	return TRUE;
+}
+
+gboolean ws_strtou64(const gchar* str, const gchar** endptr, guint64* cint)
+{
+	return ws_basestrtou64(str, endptr, cint, 10);
+}
+
+gboolean ws_hexstrtou64(const gchar* str, const gchar** endptr, guint64* cint)
+{
+	return ws_basestrtou64(str, endptr, cint, 16);
+}
+
 #define DEFINE_WS_STRTOU_BITS(bits) \
-int ws_strtou##bits(const gchar* str, const gchar** endptr, guint##bits* cint) \
+static gboolean ws_basestrtou##bits(const gchar* str, const gchar** endptr, guint##bits* cint, int base) \
 { \
 	guint64 val; \
-	if (!ws_strtou64(str, endptr, &val)) { \
+	if (!ws_basestrtou64(str, endptr, &val, base)) { \
 		/* \
 		 * For ERANGE, return G_MAXUINT##bits for parallelism \
 		 * with ws_strtoi##bits(). \
 		 * \
 		 * For other errors, return 0, for parallelism \
-		 * with ws_strtou64(). \
+		 * with ws_basestrtou64(). \
 		 */ \
 		if (errno == ERANGE) \
 			*cint = G_MAXUINT##bits; \
@@ -176,6 +186,16 @@ int ws_strtou##bits(const gchar* str, const gchar** endptr, guint##bits* cint) \
 	} \
 	*cint = (guint##bits)val; \
 	return TRUE; \
+} \
+\
+gboolean ws_strtou##bits(const gchar* str, const gchar** endptr, guint##bits* cint) \
+{ \
+	return ws_basestrtou##bits(str, endptr, cint, 10); \
+} \
+\
+gboolean ws_hexstrtou##bits(const gchar* str, const gchar** endptr, guint##bits* cint) \
+{ \
+	return ws_basestrtou##bits(str, endptr, cint, 16); \
 }
 
 DEFINE_WS_STRTOU_BITS(32)
diff --git a/wsutil/strtoi.h b/wsutil/strtoi.h
index 3361da8fc3..eb65fec218 100644
--- a/wsutil/strtoi.h
+++ b/wsutil/strtoi.h
@@ -30,7 +30,7 @@
 #include "ws_symbol_export.h"
 
 /*
- * \brief Convert a string to a signed/unsigned int, with error checks.
+ * \brief Convert a decimal string to a signed/unsigned int, with error checks.
  * \param str The string to convert
  * \param endptr A pointer that will store a pointer to the first invalid
  * character in str, allowing a number to be parsed even if there is trailing
@@ -51,6 +51,24 @@ WS_DLL_PUBLIC gboolean ws_strtou32(const gchar* str, const gchar** endptr, guint
 WS_DLL_PUBLIC gboolean ws_strtou16(const gchar* str, const gchar** endptr, guint16* cint);
 WS_DLL_PUBLIC gboolean ws_strtou8 (const gchar* str, const gchar** endptr, guint8*  cint);
 
+/*
+ * \brief Convert a hexadecimal string to an unsigned int, with error checks.
+ * \param str The string to convert
+ * \param endptr A pointer that will store a pointer to the first invalid
+ * character in str, allowing a number to be parsed even if there is trailing
+ * whitespace. If NULL, then the string is assumed to contain only valid
+ * characters (or it will error out).
+ * \param cint The converted integer
+ * \return TRUE if the conversion succeeds, FALSE otherwise.
+ * On error, errno is set to EINVAL for unrecognized input and ERANGE
+ * if the resulting number does not fit in the type.
+ */
+
+WS_DLL_PUBLIC gboolean ws_hexstrtou64(const gchar* str, const gchar** endptr, guint64* cint);
+WS_DLL_PUBLIC gboolean ws_hexstrtou32(const gchar* str, const gchar** endptr, guint32* cint);
+WS_DLL_PUBLIC gboolean ws_hexstrtou16(const gchar* str, const gchar** endptr, guint16* cint);
+WS_DLL_PUBLIC gboolean ws_hexstrtou8 (const gchar* str, const gchar** endptr, guint8*  cint);
+
 #endif
 
 /*