Enable ND_LONGJMP_FROM_TCHECK, print the protocol name early, report an
undersized packet as invalid instead of truncated, fetch/test and advance
the pointer one field at a time and print values as soon as they become
available.
It's a follow-up to commit 81dbf4a0b0.
There is no need to update ether_print(), ether_common_print() and
ether_switch_tag_print() to void functions: back to u_int functions.
There is also no need to add a flag parameter to ether_print(),
ether_common_print() and ether_switch_tag_print(): Remove it.
brcm_tag_if_print()
brcm_tag_prepend_if_print()
dsa_if_print()
edsa_if_print()
ether_if_print()
netanalyzer_if_print()
netanalyzer_transparent_if_print()
Update ether_print(), ether_common_print() and ether_switch_tag_print()
to void functions.
Add a flag parameter to ether_print(), ether_common_print() and
ether_switch_tag_print() to increment the link-layer header length field
of the netdissect_options when needed.
The calls use TRUE when the return value of the funtions was used.
The calls with FALSE avoid increments when the calls are nested.
Moreover:
Remove trailing "_if" from some protocol names.
Add a ND_BYTES_AVAILABLE_AFTER() macro to find the number of bytes
available in the captured data, starting at the byte pointed to by the
argument. It returns a u_int rather than a ptrdiff_t, so it'll be
32 bits on LP64 and LLP64 platforms as well as on ILP32 platforms. Use
that macro.
Make size-of-buffer arguments size_t.
Cast some size_t and ptrdiff_t values to u_int or int.
The exceptions are currently:
Some EXTRACT_ in print-juniper.c, not used on packet buffer pointer.
An EXTRACT_BE_U_3 in addrtoname.c, not always used on packet buffer
pointer.
This can prevent bizarre failures if, for example, you've done a
configuration in the top-level source directory, leaving behind one
config.h file, and then do an out-of-tree build in another directory,
with different configuration options. This way, we always pick up the
same config.h, in the build directory.
Now all the macros have a name meaning a count in bytes.
With _S_: signed, _U_: unsigned
e.g.:
EXTRACT_BE_32BITS -> EXTRACT_BE_U_4
EXTRACT_LE_32BITS -> EXTRACT_LE_U_4
...
EXTRACT_BE_INT32 -> EXTRACT_BE_S_4
and have:
EXTRACT_8BITS -> EXTRACT_U_1
EXTRACT_INT8 -> EXTRACT_S_1
In that function the "length" parameter means off-the-wire length, that
is, the length declared inside the outer header. The "caplen" parameter
means the amount of bytes actually available in the captured packet.
gre_print_0() and the functions modelled after it passed the value of
"length" instead of the value of "caplen", this could make ether_print()
access beyond the memory allocated for the captured packet. Brian
Carpenter had demonstrated this for the OTV case.
Fix the involved functions that call ether_print() to pass the correct
value and leave a comment to dismiss "caplen" later as its value can be
reliably derived from the other ether_print() parameters.
The purpose of this macro was to enable the file-by-file switch to NDO,
after which only tcpdump.c had a use of it and the definitions guarded
by it. Update tcpdump.c not to require them any more and dismiss the
unused definitions.
And, as we require at least autoconf 2.61, and as autoconf 2.61 and
later have AC_TYPE_UINTn_T and AC_TYPE_INTn_T macros, we use them to
define the uintN_t and intN_t macros if the system doesn't define them
for us.
This lets us get rid of bitypes.h as well.
