-#define IP_DF 0x4000 /* don't fragment */
-
-/**
- * Push IPv4 header to buffer
- *
- * This does not support fragmentation.
- *
- * @param vm - vlib_main
- * @param b - buffer to write the header to
- * @param src - source IP
- * @param dst - destination IP
- * @param prot - payload proto
- *
- * @return - pointer to start of IP header
- */
-always_inline void *
-vlib_buffer_push_ip4 (vlib_main_t * vm, vlib_buffer_t * b,
- ip4_address_t * src, ip4_address_t * dst, int proto,
- u8 csum_offload)