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At various points we need to track the lengths of a packet including or
excluding various different sets of headers. We don't always use the same
variable names for doing so. Worse in some places we use the same name
for different things: e.g. tcp_fill_headers[46]() use ip_len for the
length including the IP headers, but then tcp_send_flag() which calls it
uses it to mean the IP payload length only.
To improve clarity, standardise on these names:
dlen: L4 protocol payload length ("data length")
l4len: plen + length of L4 protocol header
l3len: l4len + length of IPv4/IPv6 header
l2len: l3len + length of L2 (ethernet) header
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
16 lines
413 B
C
16 lines
413 B
C
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright (c) 2021 Red Hat GmbH
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* Author: Stefano Brivio <sbrivio@redhat.com>
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*/
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#ifndef PCAP_H
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#define PCAP_H
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void pcap(const char *pkt, size_t l2len);
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void pcap_multiple(const struct iovec *iov, size_t frame_parts, unsigned int n,
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size_t offset);
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void pcap_iov(const struct iovec *iov, size_t iovcnt);
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void pcap_init(struct ctx *c);
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#endif /* PCAP_H */
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