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/linux-4.1.27/net/packet/
Daf_packet.c1881 unsigned short macoff, netoff, hdrlen; in tpacket_rcv() local
1928 macoff = netoff = TPACKET_ALIGN(po->tp_hdrlen) + 16 + in tpacket_rcv()
1935 macoff = netoff - maclen; in tpacket_rcv()
1938 if (macoff + snaplen > po->rx_ring.frame_size) { in tpacket_rcv()
1950 snaplen = po->rx_ring.frame_size - macoff; in tpacket_rcv()
1954 } else if (unlikely(macoff + snaplen > in tpacket_rcv()
1958 nval = GET_PBDQC_FROM_RB(&po->rx_ring)->max_frame_len - macoff; in tpacket_rcv()
1960 snaplen, nval, macoff); in tpacket_rcv()
1964 macoff = GET_PBDQC_FROM_RB(&po->rx_ring)->max_frame_len; in tpacket_rcv()
1969 TP_STATUS_KERNEL, (macoff+snaplen)); in tpacket_rcv()
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