9d2d346aae
Previously, the maximum packet size was hardcoded with 512 + size of the DHCP header. This makes the packet size increased when necessary. See option_append_hdr(). Previously, all functions which append DHCP options took the head of the unused area of the packet, and the size of the free area. However, with this change, the buffer for the whole packet may be reallocated, hence now they take the head of the packet and the offset to the free area. Fixes #24851.
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