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authorStefano Brivio <sbrivio@redhat.com>2022-03-25 13:02:47 +0100
committerStefano Brivio <sbrivio@redhat.com>2022-03-29 15:35:38 +0200
commitbb708111833e23cafda1a5dd377e13400fa1e452 (patch)
tree253e39ce109dc80e3ab13b2773212a460e4b5234 /test/icmp
parent3e4c2d10985027775683255e5d5fef5149ef8e0b (diff)
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treewide: Packet abstraction with mandatory boundary checks
Implement a packet abstraction providing boundary and size checks based on packet descriptors: packets stored in a buffer can be queued into a pool (without storage of its own), and data can be retrieved referring to an index in the pool, specifying offset and length. Checks ensure data is not read outside the boundaries of buffer and descriptors, and that packets added to a pool are within the buffer range with valid offset and indices. This implies a wider rework: usage of the "queueing" part of the abstraction mostly affects tap_handler_{passt,pasta}() functions and their callees, while the "fetching" part affects all the guest or tap facing implementations: TCP, UDP, ICMP, ARP, NDP, DHCP and DHCPv6 handlers. Suggested-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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