diff options
| -rw-r--r-- | src/gb/gprs_ns_frgre.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/gb/gprs_ns_frgre.c b/src/gb/gprs_ns_frgre.c index e557c7e8..57cf65e3 100644 --- a/src/gb/gprs_ns_frgre.c +++ b/src/gb/gprs_ns_frgre.c @@ -43,12 +43,16 @@ #define GRE_PTYPE_IPv4 0x0800 #define GRE_PTYPE_KAR 0x0000 /* keepalive response */ +#ifndef IPPROTO_GRE +# define IPPROTO_GRE 47 +#endif + struct gre_hdr { uint16_t flags; uint16_t ptype; } __attribute__ ((packed)); -#if defined(__FreeBSD__) || defined(__APPLE__) +#if defined(__FreeBSD__) || defined(__APPLE__) || defined(__CYGWIN__) /** * On BSD the IPv4 struct is called struct ip and instead of iXX * the members are called ip_XX. One could change this code to use |