dhcp: Don't use signed char for DHCP options

The value of DHCP_OPTEND is 255.  When it is assigned this result in a
sign change as the positive int constant is cast to a signed char and -1
results. Clang 4.0 complains about this.

diff --git a/src/libcharon/plugins/dhcp/dhcp_socket.c b/src/libcharon/plugins/dhcp/dhcp_socket.c
index 42f8f1ef975d1242d734de16cab83952d3051e2e..4f4e1ffe0f1eeeefe8774ef992c218d33933507f 100644 (file)
--- a/src/libcharon/plugins/dhcp/dhcp_socket.c
+++ b/src/libcharon/plugins/dhcp/dhcp_socket.c
@@ -176,7 +176,7 @@ typedef struct __attribute__((packed)) {
        char server_hostname[64];
        char boot_filename[128];
        uint32_t magic_cookie;
-       char options[252];
+       u_char options[252];
 } dhcp_t;
 
 /**