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The IEEE 802.3 standard commonly refers to the field specifying the
upper layer protocol as Ethertype, not protocol. Thus, also support the
keywords "etype" and "type" for this field.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Add function 'udp()' to generate UDP header.
Fields supported:
sp|sport UDP source port (default 0)
dp|dport UDP destination port (default 0)
len|length Length of UDP header + payload (calculated automatically)
csum Checksum field (calculated automatically)
Example (Echo request):
{ udp(dport=7) }
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Add 'ip4(), ipv4()' function to build IPv4 header.
Fields supported:
ihl IPv4 header length (default 5 )
ver|version IPv4 version (default 4)
ttl Time To Live (TTL) field (default 0)
dscp DiffServ field (default 0)
ecn ECN bits (default 0)
tos TOS (DSCP + ECN) field (default 0)
len|length IPv4 header + payload length (calculated by default)
id Identifier (default 0)
flags Flags field (default 0)
frag Fragment offset (default 0)
csum IPv4 header checksum (calculated by default)
df Set DF (Dont Fragment) bit to 1 (default is 0)
mf Set MF (More Fragments) bit to 1 (default is 0)
sa|saddr IPv4 source address (default used from output device)
da|daddr IPv4 destination address (default 0.0.0.0)
proto IPv4 protocol id (default 0)
Example:
{ ip4(df, mf, frag=100, prot=0x1, ecn=2, dscp=20) }
{ ip4(da=1.1.1.1), ip4(sa=3.3.3.3, da=3.3.3.4) }
Last example generates IP-in-IP packet.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Add function 'arp()' to support generating ARP header fields from
the trafgen configuration language.
Supported fields:
htype hardware type, default: 1 (Ethernet)
ptype protocol type, default: 0x0800 (IP)
op|oper operation (req|request, reply, <num>), default: 1 (request)
sha|smac sender MAC address, default: device MAC
spa|sip sender IP address, default: device IP
tha|tmac target MAC address, default: 00:00:00:00:00:00
tpa|tip target IP address, default: 0.0.0.0
Note: setting hlen and tlen is not supported, these will by set to
hlen=6 and plen=4 in any case.
Example usage:
{ arp(op=request, sip=1.1.1.1, smac=11:22:33:44:55:66, tip=42.42.42.42) }
{ arp() }
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
[tk: document keywords in commit message]
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Add function 'eth()' to support generating Ethernet header fields from the
trafgen configuration language.
Supported fields:
da|daddr destination address, default: 00:00:00:00:00:00
sa|saddr source address, default: device MAC
prot|proto protocol number, default: 0x0000
Example usage:
{ eth(prot=0x0800, da=11:22:33:44:55:66), fill(0xff, 60) }
{ eth(prot=0x0800) }
{ eth() }
It is important that proto_init is called before fields will be filled
to initialize the specified proto with header fields.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
[tk: document supported keywords in commit message]
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Add the csumudp6 and csumtcp6 helper functions in order to simplify
checksum generation for TCP/UDP packets sent over IPv6.
trafgen example for TCP over IPv6:
{
/* MAC Destination */
fill(0xff, 6),
/* MAC Source */
0x00, 0x02, 0xb3, drnd(3),
/* IPv6 Protocol */
c16(0x86DD),
/* Version, Traffic Class, Flow Label */
0b01100000, c8(0), c16(0),
/* Payload Length */
c16(54),
/* Next Header (TCP) */
c8(6),
/* Hop Limit */
c8(64),
/* Source IPv6 */
0xfe, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xba, 0xac, 0x6f, 0xff, 0xfe, 0xa4, 0x12, 0xe3,
/* Destination IPv6 */
0xfe, 0x80, 0x82, 0x2e, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0xde, 0xff, 0xfe, 0x00, 0x06, 0xde,
/* TCP Source Port */
c16(55042),
/* TCP Destination Port */
c16(55043),
/* TCP Sequence Number */
drnd(4),
/* TCP Ackn. Number */
c32(0),
/* TCP Header length + TCP SYN/ECN Flag */
c16((8 << 12) | (1 << 1) | (1 << 6))
/* Window Size */
c16(16),
/* TCP Checksum (offset IPv6, offset TCP) */
csumtcp6(14, 54),
/* TCP Options */
0x00, 0x00, 0x01, 0x01, 0x08, 0x0a, 0x06,
0x91, 0x68, 0x7d, 0x06, 0x91, 0x68, 0x6f,
/* Data blob */
"foobar!",
}
Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Some regarding unused parameter, some regarding signed/unsigned
comparison.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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When do not detect any shellcode, make sure we return the original
string only.
Reported-by: Jon Schipp <jonschipp@gmail.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Also allow for ...
- hex: 0xff, xff
- binary: 0b11110000, b11110000
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Also return if no needle has been found in the shell code haystack.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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After commit f9591eebe40c (trafgen: lexer/parser: fix cpu() selection
and whitespacing), we also need to fixup the help description, so that
users start using the cpu(X-Y) notation instead. Also, reintroduce the
alias csum16 for csumip.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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It looks unintuitive when once needs to write cpu(0:3), so also allow
cpu(0-3). Then it's quite stupid to enforce whitespace after the double
colon before the curley braces open. So make this rather optional here.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Both, the IP and ICMP checksums use the same algorithm from RFC1071.
Thus, it's enough if we give csumip an alias to csumicmp, so that it
can be used in trafgen packet configurations. It's calculated from
the ICMP header + data, with value 0 for this field.
Suggested-by: Jon Schipp <jonschipp@gmail.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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We decided to get rid of the old Git history and start a new one for
several reasons:
*) Allow / enforce only high-quality commits (which was not the case
for many commits in the history), have a policy that is more close
to the one from the Linux kernel. With high quality commits, we
mean code that is logically split into commits and commit messages
that are signed-off and have a proper subject and message body.
We do not allow automatic Github merges anymore, since they are
total bullshit. However, we will either cherry-pick your patches
or pull them manually.
*) The old archive was about ~27MB for no particular good reason.
This basically derived from the bad decision that also some PDF
files where stored there. From this moment onwards, no binary
objects are allowed to be stored in this repository anymore.
The old archive is not wiped away from the Internet. You will still
be able to find it, e.g. on git.cryptoism.org etc.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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