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ETH_P_8021AD might be undefined on 2.6.x Linux version (tested
on Ubuntu 10 with 2.6.32 Linux), so lets check and define it.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Add 'pfc()' function for PFC header creation with fields:
code - MAC Control opcode
prio - Priority enable vector
prio(0)..prio(7) - Enable/disable pause for prio X
time(0)..time(7) - Set pause time for prio X
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Add 'pause()' proto header function for IEEE 802.3X PAUSE header
generation with the fields:
code - MAC Control opcode (default 0x0001)
time - PAUSE time (default 0)
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Add syntax for specify dynamic random function for proto field:
drnd() | drnd(min, max)
EXAMPLE:
{ udp(sport=drnd()) }
{ udp(sport=drnd(1000, 2000)) }
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Add 'dinc()' function in 'field_expr' rules to be used for dynamically
incrementing of any specified field:
SYNTAX := dinc() | dinc(step) | dinc(min, max) | dinc(min, max, step)
EXAMPLES:
{ udp(sport=dinc() }
{ udp(sport=dinc(1) }
{ udp(sport=dinc(100, 125, 5) }
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Changed parsing logic of field value expression to be more generic. Such
approach will allow to easy extend field value expression to support
dynamic field functions.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Currently struct proto_hdr is used twofold:
1) Statically define protocol behavior, i.e. all the *_hdr definitions in
trafgen_l{2,3,4}.c which map a protocol id/layer to a set of callback
functions.
2) For each packet created at parse time the struct is memcpy()'ed
(including all the static information from 1) and then used to store
dynamic information at parse/run time.
Thus, struct proto_hdr members such as the proto id, layer and the
pointers callback functions get copied for each created packet (in
addition to the other fields which get changed during parsing). Also,
static/dynamic information get mixed and we e.g. can't make the protocol
definitions const to ensure they'll not get changed by mistake.
Rather than copying the struct proto_hdr for every packet, clearly
separate the two purposes defined above by splitting struct proto_hdr
into two structs:
1) struct proto_ops for the static (const) protocol behavior definition
2) struct proto_hdr (reduced) for dynamic information
struct proto_hdr keeps a pointer to the corresponding proto_ops instance
and uses it to execute the corresponding callbacks.
Reference: https://groups.google.com/forum/#!msg/netsniff-ng/20RvwJdh50Y/eMkbmKSaBgAJ
Acked-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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If a non-accessible (or non-existing) file is passed to trafgen and the
-p/--cpp option is used, the preprocessor will fail but trafgen will
continue running and producing follow-up errors messages:
cpp: error: foo.conf: No such file or directory
cpp: warning: ‘-x c’ after last input file has no effect
cpp: fatal error: no input files
compilation terminated.
0 packets to schedule
Enabled kernel qdisc bypass
0 bytes in total
Running! Hang up with ^C!
Enabled kernel qdisc bypass
TX,V2: 0.50 MiB, 256 Frames, each 2048 Byte allocated
TX,V2: 0.50 MiB, 256 Frames, each 2048 Byte allocated
0 packets outgoing
0 bytes outgoing
0 sec, 0 usec on CPU0 (0 packets)
0 sec, 0 usec on CPU1 (0 packets)
To avoid this, check that the file is readable before passing it to the
preprocessor and error out if is not readable.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Until now headers were used only for packet creation at compile time,
which does not allow to handle dynamic field updates at runtime. To
support dynamic updates, it is necessary to keep the proto_hdr entries
around after packet compilation so we can reference the header fields to
dynamically update.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
[tk: Adjust patch description, simplify code]
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Using of current_packet() is not possible for dynamically updated fields
so we need to keep the packet index in proto_hdr struct to reference the
correct packet.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Support for generating ICMPv4 headers using the 'icmp4()/icmpv4()'
trafgen generation functions.
Fields supported:
type Set type field (default 0: Echo reply)
Supported keywords: echorequest, echoreply
code Set code field (default 0)
csum Set checksum field (calculated by default)
mtu Set mtu field for destination unreachable (default 0)
seq Set sequence field (default 0)
id Set identifier field (default 0)
addr Set redirect address (default 0.0.0.0)
Example (send ping request):
{ icmpv4(echorequest, seq=1, id=1326) }
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
[tk: squash commits, consistency between functionality and docu]
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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After splitting etype & type to different tokens it is possible
to use 'type' for ICMP type field which is used by RFC.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Split [e]type to separate 'type' & 'etype' keywords,
the reason is that 'type' might be used in other protocol
headers (e.g. ICMP).
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Support for generating simple ICMPv6 headers using the 'icmp6()/icmpv6()'
trafgen generation function.
Fields supported:
mtype Message type (default: 0)
Supported keywords: echorequest, echoreply
code Code (default: 0)
csum Message checksum (calculated by default)
Examples:
{ eth(), ipv6(daddr=::1), icmpv6(echorequest), 42, 42, 0, 0 }'
If not explicitely specified, the lower header is initialized as Ethernet.
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Support for generating simple IPv6 headers using the 'ip6()/ipv6()'
trafgen generation function.
Fields supported:
ver|version Version (default: 6)
tc|tclass Traffic class (default: 0)
fl|flow Flow Label (default: 0)
len|length Payload length (calculated by default)
nh|nexthdr Type of next header (default: 0)
hl|hoplimit|ttl Hop Limit, TTL (default: 0)
sa|saddr Source IPv6 address (default: device address)
da|daddr Destination IPv6 address (default: 0:0:0:0:0:0:0:0)
Examples:
{ eth(), ipv6(daddr=1:2:3:4:5:6:7:8) }
{ ipv6(tc=2, hl=3, daddr=::1) }
{ eth(), ipv6(nh=58, sa=2001:db8::, da=::1), 128, 0, 0x52, 0x03, 0, 0, 0, 0 }
If not explicitely specified, the lower header is initialized as Ethernet.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Add 'mpls()' function for creating MPLS header with parameters:
lbl|label MPLS label
last Indicates the last label on MPLS stack
tc|tclass|exp Traffic Class (TC)
ttl TTL (Time To Live)
Currently only unicast MPLS is supported, but multicast might be set
via 'eth()' function.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Add 'vlan()' function to generate VLAN header.
Fields supported:
tpid|proto Set TPID (Tag Protocol Identifier) (default 0x8100)
1ad Set TPID field as 0x88a8
1q Set TPID field as 0x8100
tci Set TCI (Tag Control Information) (default 0)
pcp Set PCP (Priority Code Point) (PCP) (default 0)
dei|cfi Set DEI (Drop Eligible Indicator) (default 0)
id Set VID (VLAN Identifier) (default 0)
Examples:
{ eth(), vlan(id=1), ipv4() }
{ vlan(id=1, 1ad), vlan(id=100, pcp=3), ipv4() }
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Change proto_header_init(...) and proto_lower_default_add(...)
functions to return struct proto_hdr * to do not call
proto_current_header(...) after, so it makes more sense to get struct
proto_hdr * right after initializing protocol by id.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Get rid of some unnecessary double spaces to make parsers rules look
consistent.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Commit 2ba202b introduced the [e]type field for specifiying the
Ethertype, but at the same time made the existing "prot[o]" field name
not work anymore. Fix it by providing a specific parser rule as it
cannot be solved in the lexer grammar alone (which will always use the
first matching token).
Fixes: 2ba202b ("trafgen: parser: Support "etype"/"type" keywords for Ethertype")
Reported-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Add a function 'tcp()' to generate TCP headers from the trafgen
configuration language.
Fields supported:
sp|sport TCP source port (default 0)
dp|dport TCP destination port (default 0)
seq Sequence number (default: 0)
aseq|ackseq Acknowledgement number (default 0)
doff|hlen Header length/data offset (default: 5)
cwr Congestion Window Reduced flag (default: 0)
ece|ecn ECN-Echo flag (default: 0)
urg Urgent flag (default: 0)
ack Acknowledgement flag (default: 0)
psh Push flag (default: 0)
rst Reset flag (default: 0)
syn Synchronize flag (default: 0)
fin Finish flag (default: 0)
win|window Receive window size (default: 0)
csum Checksum field (calculated automatically)
urgptr Urgent pointer (default: 0)
Example (SYN on port 80/http):
{ tcp(dport=80, syn, window=5840) }
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Rename lexer/parser type and union member ip_addr to ip4_addr. This
will make it easier to distinguish from IPv6 addresses, to be added an a
follow-up patch.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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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 current_packet() helper for getting current
used packet and make it public to other modules.
It will be used by proto generation logic.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Make public set_fill func to be used by proto generation code.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Pass argv as char *const argv[] as execvp expects it.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Add -D,--define option which allows to pass multiple
macro/defines which can be used in trafgen script
(e.g. by #ifdef ).
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Extend cpp_exec function with args parameter to
specify additional cpp options (like -D).
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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In case if cpp failed then it is possible that trafgen
may hang on closing uninitialized yyin.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Use cpp_exec func to invoke C preprocesor.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Do not perform fclose for stdin fd.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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The `ccsum' parameter to calc_csum() is never used and is set to 0 by
all callers. There's no reason to keep it, so remove it.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Craft packet directly from command line with same syntax as for conf file.
It might be as first step to extend current syntax with specific proto fields.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Move has_dynamic_elems() to to trafgen_conf.h, rename it to
packet_dyn_has_elems() and use it to check whether dynamic
packet elements are present.
Also change the return type to bool and use || instead of + to
potentially make use of short-circuit evaluation.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Match two arguments to the respective types provided in its only caller
in trafgen.c:main_loop()
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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If the C preprocessor is used to parse the packet description, a
temporary file is created which is not deleted if an error occurs during
parsing in compile_packets().
Instead, don't panic() on errors and only print a message, and only
die() once we cleaned up after us.
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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Make it more readable.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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xrealloc() has an additional nmemb argument compared to realloc() for
which it should serve as a wrapper. Since we always call with nmemb = 1,
we might as well remove this argument and thus have xrealloc() conform
to the realloc() function prototype.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Any types that are fixed width should use the standard format specifier
macros (PRI... for printf-type functions, SCN... for scanf-type
functions) to ensure proper data access.
Prior to this ifpps was crashing in 32-bit environments due to the
following call
mvwprintw(screen, (*voff)++, 2,
"%s,%s %s (%s%s), t=%lums, cpus=%u%s/%u"
" ", uts.release, machine,
ifname, drvinf.driver, buff, ms_interval, top_cpus,
top_cpus > 0 && top_cpus < cpus ? "+1" : "", cpus);
since ms_interval is a uint64_t but %lu expects an unsigned long, which
is only 32 bits.
Signed-off-by: James McCoy <vega.james@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Currently, the path to the configuration files is hardcoded to
$PREFIX/etc/netsniff-ng.
If we want to keep the configuration files outside of prefix (e.g.
during development), we need to pass the complete path as specified in
$ETCDIRE (and $ETCDIR respectively, which could e.g. be overriden on the
command line during build install) as a preprocessor define.
This way, we can e.g. install the configuration files to /etc while
installing the binaries in /usr/local with:
$ make PREFIX=/usr/local ETCDIR=/etc
$ make PREFIX=/usr/local ETCDIR=/etc install
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Check the return value of system() when invoking CPP in the BPF
parser and bail out in case of an error.
This fixes the following compiler warning:
trafgen_parser.y:598:9: warning: ignoring return value of ‘system’, declared with attribute warn_unused_result [-Wunused-result]
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Finally eliminate xutils.{c,h} and move the rest to epoll2.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Break out all string handling functions and lockme stuff in order
to further eliminate the big code blob in xutils, so that it can
be easier maintained.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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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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Jon Schipp reported that a arbitrary packet config
such as ...
{
"MyPacket",
"MyPacket",
"MyPacket",
"MyPacket",
"MyPacket",
"MyPacket",
"MyPacket",
"MyPacket",
}
... doesn't work anymore, although it used to work. This
regression was introduced by commit f9591eebe40c ("trafgen:
lexer/parser: fix cpu() selection and whitespacing").
Reported-by: Jon Schipp <jonschipp@gmail.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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