trex - ARCHIVED- 2020-07-23 at the request of the project

diff options

author	Hanoh Haim <hhaim@cisco.com>	2016-12-19 16:06:38 +0200
committer	Hanoh Haim <hhaim@cisco.com>	2016-12-19 16:06:38 +0200
commit	5741208336a7ff0262eefd82a80551cf37bf576a (patch)
tree	d56bf6651085f369276804fcfab89437b22c6ea1 /scripts/stl/burst_simple.py
parent	4d81618514ca2a22d777abe22ff49d44e70569e0 (diff)
parent	b75910ef6bb781b0d28eb253758bbe65d573b768 (diff)

Merge branch 'payload_gen_total_size_ether_chksum' of git://github.com/kisel/trex-core into field_engine

Diffstat (limited to 'scripts/stl/burst_simple.py')

0 files changed, 0 insertions, 0 deletions

ref='#n119'>119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522

## This file is part of Scapy
## See http://www.secdev.org/projects/scapy for more informations
## Copyright (C) Philippe Biondi <phil@secdev.org>
## This program is published under a GPLv2 license

"""
Linux specific functions.
"""

from __future__ import with_statement
import sys,os,struct,socket,time
from select import select
from fcntl import ioctl
import scapy.utils
import scapy.utils6
from scapy.config import conf
from scapy.data import *
from scapy.supersocket import SuperSocket
import scapy.arch
from scapy.error import warning, Scapy_Exception



# From bits/ioctls.h
SIOCGIFHWADDR  = 0x8927          # Get hardware address    
SIOCGIFADDR    = 0x8915          # get PA address          
SIOCGIFNETMASK = 0x891b          # get network PA mask     
SIOCGIFNAME    = 0x8910          # get iface name          
SIOCSIFLINK    = 0x8911          # set iface channel       
SIOCGIFCONF    = 0x8912          # get iface list          
SIOCGIFFLAGS   = 0x8913          # get flags               
SIOCSIFFLAGS   = 0x8914          # set flags               
SIOCGIFINDEX   = 0x8933          # name -> if_index mapping
SIOCGIFCOUNT   = 0x8938          # get number of devices
SIOCGSTAMP     = 0x8906          # get packet timestamp (as a timeval)

# From if.h
IFF_UP = 0x1               # Interface is up.
IFF_BROADCAST = 0x2        # Broadcast address valid.
IFF_DEBUG = 0x4            # Turn on debugging.
IFF_LOOPBACK = 0x8         # Is a loopback net.
IFF_POINTOPOINT = 0x10     # Interface is point-to-point link.
IFF_NOTRAILERS = 0x20      # Avoid use of trailers.
IFF_RUNNING = 0x40         # Resources allocated.
IFF_NOARP = 0x80           # No address resolution protocol.
IFF_PROMISC = 0x100        # Receive all packets.

# From netpacket/packet.h
PACKET_ADD_MEMBERSHIP  = 1
PACKET_DROP_MEMBERSHIP = 2
PACKET_RECV_OUTPUT     = 3
PACKET_RX_RING         = 5
PACKET_STATISTICS      = 6
PACKET_MR_MULTICAST    = 0
PACKET_MR_PROMISC      = 1
PACKET_MR_ALLMULTI     = 2

# From bits/socket.h
SOL_PACKET = 263
# From asm/socket.h
SO_ATTACH_FILTER = 26
SOL_SOCKET = 1

# From net/route.h
RTF_UP = 0x0001  # Route usable
RTF_REJECT = 0x0200



LOOPBACK_NAME="lo"

#with os.popen("tcpdump -V 2> /dev/null") as _f:
#    if _f.close() >> 8 == 0x7f:
#        log_loading.warning("Failed to execute tcpdump. Check it is installed and in the PATH")
#        TCPDUMP=0
#    else:
#        TCPDUMP=1
#del(_f)
TCPDUMP=0
    

def get_if_raw_hwaddr(iff):
    return struct.unpack("16xh6s8x",get_if(iff,SIOCGIFHWADDR))

def get_if_raw_addr(iff):
    try:
        return get_if(iff, SIOCGIFADDR)[20:24]
    except IOError:
        return "\0\0\0\0"


def get_if_list():
    try:
        f=open("/proc/net/dev","r")
    except IOError:
        warning("Can't open /proc/net/dev !")
        return []
    lst = []
    f.readline()
    f.readline()
    for l in f:
        lst.append(l.split(":")[0].strip())
    return lst
def get_working_if():
    for i in get_if_list():
        if i == LOOPBACK_NAME:                
            continue
        ifflags = struct.unpack("16xH14x",get_if(i,SIOCGIFFLAGS))[0]
        if ifflags & IFF_UP:
            return i
    return LOOPBACK_NAME
def attach_filter(s, filter):
    # XXX We generate the filter on the interface conf.iface 
    # because tcpdump open the "any" interface and ppp interfaces
    # in cooked mode. As we use them in raw mode, the filter will not
    # work... one solution could be to use "any" interface and translate
    # the filter from cooked mode to raw mode
    # mode
    if not TCPDUMP:
        return
    try:
        f = os.popen("%s -i %s -ddd -s 1600 '%s'" % (conf.prog.tcpdump,conf.iface,filter))
    except OSError,msg:
        log_interactive.warning("Failed to execute tcpdump: (%s)")
        return
    lines = f.readlines()
    if f.close():
        raise Scapy_Exception("Filter parse error")
    nb = int(lines[0])
    bpf = ""
    for l in lines[1:]:
        bpf += struct.pack("HBBI",*map(long,l.split()))

    # XXX. Argl! We need to give the kernel a pointer on the BPF,
    # python object header seems to be 20 bytes. 36 bytes for x86 64bits arch.
    if scapy.arch.X86_64:
        bpfh = struct.pack("HL", nb, id(bpf)+36)
    else:
        bpfh = struct.pack("HI", nb, id(bpf)+20)  
    s.setsockopt(SOL_SOCKET, SO_ATTACH_FILTER, bpfh)

def set_promisc(s,iff,val=1):
    mreq = struct.pack("IHH8s", get_if_index(iff), PACKET_MR_PROMISC, 0, "")
    if val:
        cmd = PACKET_ADD_MEMBERSHIP
    else:
        cmd = PACKET_DROP_MEMBERSHIP
    s.setsockopt(SOL_PACKET, cmd, mreq)



def read_routes():
    try:
        f=open("/proc/net/route","r")
    except IOError:
        warning("Can't open /proc/net/route !")
        return []
    routes = []
    s=socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    ifreq = ioctl(s, SIOCGIFADDR,struct.pack("16s16x",LOOPBACK_NAME))
    addrfamily = struct.unpack("h",ifreq[16:18])[0]
    if addrfamily == socket.AF_INET:
        ifreq2 = ioctl(s, SIOCGIFNETMASK,struct.pack("16s16x",LOOPBACK_NAME))
        msk = socket.ntohl(struct.unpack("I",ifreq2[20:24])[0])
        dst = socket.ntohl(struct.unpack("I",ifreq[20:24])[0]) & msk
        ifaddr = scapy.utils.inet_ntoa(ifreq[20:24])
        routes.append((dst, msk, "0.0.0.0", LOOPBACK_NAME, ifaddr))
    else:
        warning("Interface lo: unkown address family (%i)"% addrfamily)

    for l in f.readlines()[1:]:
        iff,dst,gw,flags,x,x,x,msk,x,x,x = l.split()
        flags = int(flags,16)
        if flags & RTF_UP == 0:
            continue
        if flags & RTF_REJECT:
            continue
        try:
            ifreq = ioctl(s, SIOCGIFADDR,struct.pack("16s16x",iff))
        except IOError: # interface is present in routing tables but does not have any assigned IP
            ifaddr="0.0.0.0"
        else:
            addrfamily = struct.unpack("h",ifreq[16:18])[0]
            if addrfamily == socket.AF_INET:
                ifaddr = scapy.utils.inet_ntoa(ifreq[20:24])
            else:
                warning("Interface %s: unkown address family (%i)"%(iff, addrfamily))
                continue
        routes.append((socket.htonl(long(dst,16))&0xffffffffL,
                       socket.htonl(long(msk,16))&0xffffffffL,
                       scapy.utils.inet_ntoa(struct.pack("I",long(gw,16))),
                       iff, ifaddr))
    
    f.close()
    return routes

############
### IPv6 ###
############

def in6_getifaddr():
    """
    Returns a list of 3-tuples of the form (addr, scope, iface) where
    'addr' is the address of scope 'scope' associated to the interface
    'ifcace'.

    This is the list of all addresses of all interfaces available on
    the system.
    """
    ret = []
    try:
        f = open("/proc/net/if_inet6","r")
    except IOError, err:    
        return ret
    l = f.readlines()
    for i in l:
        # addr, index, plen, scope, flags, ifname
        tmp = i.split()
        addr = struct.unpack('4s4s4s4s4s4s4s4s', tmp[0])
        addr = scapy.utils6.in6_ptop(':'.join(addr))
        ret.append((addr, int(tmp[3], 16), tmp[5])) # (addr, scope, iface)
    return ret

def read_routes6():
    try:
        f = open("/proc/net/ipv6_route","r")
    except IOError, err:
        return []
    # 1. destination network
    # 2. destination prefix length
    # 3. source network displayed
    # 4. source prefix length
    # 5. next hop
    # 6. metric
    # 7. reference counter (?!?)
    # 8. use counter (?!?)
    # 9. flags
    # 10. device name
    routes = []
    def proc2r(p):
        ret = struct.unpack('4s4s4s4s4s4s4s4s', p)
        ret = ':'.join(ret)
        return scapy.utils6.in6_ptop(ret)
    
    lifaddr = in6_getifaddr() 
    for l in f.readlines():
        d,dp,s,sp,nh,m,rc,us,fl,dev = l.split()
        fl = int(fl, 16)

        if fl & RTF_UP == 0:
            continue
        if fl & RTF_REJECT:
            continue

        d = proc2r(d) ; dp = int(dp, 16)
        s = proc2r(s) ; sp = int(sp, 16)
        nh = proc2r(nh)

        cset = [] # candidate set (possible source addresses)
        if dev == LOOPBACK_NAME:
            if d == '::':
                continue
            cset = ['::1']
        else:
            devaddrs = filter(lambda x: x[2] == dev, lifaddr)
            cset = scapy.utils6.construct_source_candidate_set(d, dp, devaddrs, LOOPBACK_NAME)
        
        if len(cset) != 0:
            routes.append((d, dp, nh, dev, cset))
    f.close()
    return routes   




def get_if(iff,cmd):
    s=socket.socket()
    ifreq = ioctl(s, cmd, struct.pack("16s16x",iff))
    s.close()
    return ifreq


def get_if_index(iff):
    return int(struct.unpack("I",get_if(iff, SIOCGIFINDEX)[16:20])[0])

if os.uname()[4] == 'x86_64':
    def get_last_packet_timestamp(sock):
        ts = ioctl(sock, SIOCGSTAMP, "1234567890123456")
        s,us = struct.unpack("QQ",ts)
        return s+us/1000000.0
else:
    def get_last_packet_timestamp(sock):
        ts = ioctl(sock, SIOCGSTAMP, "12345678")
        s,us = struct.unpack("II",ts)
        return s+us/1000000.0


def _flush_fd(fd):
    if type(fd) is not int:
        fd = fd.fileno()
    while 1:
        r,w,e = select([fd],[],[],0)
        if r:
            os.read(fd,MTU)
        else:
            break





class L3PacketSocket(SuperSocket):
    desc = "read/write packets at layer 3 using Linux PF_PACKET sockets"
    def __init__(self, type = ETH_P_ALL, filter=None, promisc=None, iface=None, nofilter=0):
        self.type = type
        self.ins = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(type))
        self.ins.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 0)
        _flush_fd(self.ins)
        if iface:
            self.ins.bind((iface, type))
        if not nofilter:
            if conf.except_filter:
                if filter:
                    filter = "(%s) and not (%s)" % (filter, conf.except_filter)
                else:
                    filter = "not (%s)" % conf.except_filter
            if filter is not None:
                attach_filter(self.ins, filter)
        self.ins.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 2**30)
        self.outs = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(type))
        self.outs.setsockopt(socket.SOL_SOCKET, socket.SO_SNDBUF, 2**30)
        if promisc is None:
            promisc = conf.promisc
        self.promisc = promisc
        if self.promisc:
            if iface is None:
                self.iff = get_if_list()
            else:
                if iface.__class__ is list:
                    self.iff = iface
                else:
                    self.iff = [iface]
            for i in self.iff:
                set_promisc(self.ins, i)
    def close(self):
        if self.closed:
            return
        self.closed=1
        if self.promisc:
            for i in self.iff:
                set_promisc(self.ins, i, 0)
        SuperSocket.close(self)
    def recv(self, x=MTU):
        pkt, sa_ll = self.ins.recvfrom(x)
        if sa_ll[2] == socket.PACKET_OUTGOING:
            return None
        if sa_ll[3] in conf.l2types:
            cls = conf.l2types[sa_ll[3]]
            lvl = 2
        elif sa_ll[1] in conf.l3types:
            cls = conf.l3types[sa_ll[1]]
            lvl = 3
        else:
            cls = conf.default_l2
            warning("Unable to guess type (interface=%s protocol=%#x family=%i). Using %s" % (sa_ll[0],sa_ll[1],sa_ll[3],cls.name))
            lvl = 2

        try:
            pkt = cls(pkt)
        except KeyboardInterrupt:
            raise
        except:
            if conf.debug_dissector:
                raise
            pkt = conf.raw_layer(pkt)
        if lvl == 2:
            pkt = pkt.payload
            
        if pkt is not None:
            pkt.time = get_last_packet_timestamp(self.ins)
        return pkt
    
    def send(self, x):
        iff,a,gw  = x.route()
        if iff is None:
            iff = conf.iface
        sdto = (iff, self.type)
        self.outs.bind(sdto)
        sn = self.outs.getsockname()
        ll = lambda x:x
        if type(x) in conf.l3types:
            sdto = (iff, conf.l3types[type(x)])
        if sn[3] in conf.l2types:
            ll = lambda x:conf.l2types[sn[3]]()/x
        try:
            sx = str(ll(x))
            x.sent_time = time.time()
            self.outs.sendto(sx, sdto)
        except socket.error,msg:
            x.sent_time = time.time()  # bad approximation
            if conf.auto_fragment and msg[0] == 90:
                for p in x.fragment():
                    self.outs.sendto(str(ll(p)), sdto)
            else:
                raise
                    



class L2Socket(SuperSocket):
    desc = "read/write packets at layer 2 using Linux PF_PACKET sockets"
    def __init__(self, iface = None, type = ETH_P_ALL, filter=None, nofilter=0):
        if iface is None:
            iface = conf.iface
        self.ins = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(type))
        self.ins.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 0)
        _flush_fd(self.ins)
        if not nofilter: 
            if conf.except_filter:
                if filter:
                    filter = "(%s) and not (%s)" % (filter, conf.except_filter)
                else:
                    filter = "not (%s)" % conf.except_filter
            if filter is not None:
                attach_filter(self.ins, filter)
        self.ins.bind((iface, type))
        self.ins.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 2**30)
        self.outs = self.ins
        self.outs.setsockopt(socket.SOL_SOCKET, socket.SO_SNDBUF, 2**30)
        sa_ll = self.outs.getsockname()
        if sa_ll[3] in conf.l2types:
            self.LL = conf.l2types[sa_ll[3]]
        elif sa_ll[1] in conf.l3types:
            self.LL = conf.l3types[sa_ll[1]]
        else:
            self.LL = conf.default_l2
            warning("Unable to guess type (interface=%s protocol=%#x family=%i). Using %s" % (sa_ll[0],sa_ll[1],sa_ll[3],self.LL.name))
            
    def recv(self, x=MTU):
        pkt, sa_ll = self.ins.recvfrom(x)
        if sa_ll[2] == socket.PACKET_OUTGOING:
            return None
        try:
            q = self.LL(pkt)
        except KeyboardInterrupt:
            raise
        except:
            if conf.debug_dissector:
                raise
            q = conf.raw_layer(pkt)
        q.time = get_last_packet_timestamp(self.ins)
        return q


class L2ListenSocket(SuperSocket):
    desc = "read packets at layer 2 using Linux PF_PACKET sockets"
    def __init__(self, iface = None, type = ETH_P_ALL, promisc=None, filter=None, nofilter=0):
        self.type = type
        self.outs = None
        self.ins = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, socket.htons(type))
        self.ins.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 0)
        _flush_fd(self.ins)
        if iface is not None:
            self.ins.bind((iface, type))
        if not nofilter:
            if conf.except_filter:
                if filter:
                    filter = "(%s) and not (%s)" % (filter, conf.except_filter)
                else:
                    filter = "not (%s)" % conf.except_filter
            if filter is not None:
                attach_filter(self.ins, filter)
        if promisc is None:
            promisc = conf.sniff_promisc
        self.promisc = promisc
        if iface is None:
            self.iff = get_if_list()
        else:
            if iface.__class__ is list:
                self.iff = iface
            else:
                self.iff = [iface]
        if self.promisc:
            for i in self.iff:
                set_promisc(self.ins, i)
        self.ins.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, 2**30)
    def close(self):
        if self.promisc:
            for i in self.iff:
                set_promisc(self.ins, i, 0)
        SuperSocket.close(self)

    def recv(self, x=MTU):
        pkt, sa_ll = self.ins.recvfrom(x)
        if sa_ll[3] in conf.l2types :
            cls = conf.l2types[sa_ll[3]]
        elif sa_ll[1] in conf.l3types:
            cls = conf.l3types[sa_ll[1]]
        else:
            cls = conf.default_l2
            warning("Unable to guess type (interface=%s protocol=%#x family=%i). Using %s" % (sa_ll[0],sa_ll[1],sa_ll[3],cls.name))

        try:
            pkt = cls(pkt)
        except KeyboardInterrupt:
            raise
        except:
            if conf.debug_dissector:
                raise
            pkt = conf.raw_layer(pkt)
        pkt.time = get_last_packet_timestamp(self.ins)
        return pkt
    
    def send(self, x):
        raise Scapy_Exception("Can't send anything with L2ListenSocket")


conf.L3socket = L3PacketSocket
conf.L2socket = L2Socket
conf.L2listen = L2ListenSocket

conf.iface = get_working_if()


context:
space:
mode: