Patch to make mTCP running in VM environment to send packet between VM and physical server across switches

when running mTCP in VM environment like in VMware ESXi, KVM...the source MAC is zero see https://github.com/eunyoung14/mtcp/issues/51, this could result in packet being dropped, following patches avoid adding DPDK PMD driver for mTCP to save the porting effort.

 diff --git a/mtcp/src/io_module.c b/mtcp/src/io_module.c
 index ad3e01d..83e0893 100644
 --- a/mtcp/src/io_module.c
 +++ b/mtcp/src/io_module.c
 @@ -63,6 +63,22 @@ GetNumQueues()
     return queue_cnt;
  }
  /*----------------------------------------------------------------------------*/
 +
 +static int GetPortIndex(char *dev_name)
 +{
 +    char *p = dev_name;
 +    long val = -1;
 +    while (*p) { // While there are more characters to process...
 +        if (isdigit(*p)) { // Upon finding a digit, ...
 +            val = strtol(p, &p, 10); // Read a number, ...
 +        } else {
 +            p++;
 +        }
 +    }
 +    return (int)val;
 +}
 +
 +
  int
  SetInterfaceInfo(char* dev_name_list)
  {
 @@ -243,9 +259,10 @@ SetInterfaceInfo(char* dev_name_list)
                     CONFIG.eths[eidx].ip_addr = *(uint32_t *)&sin;
                 }
 -                if (ioctl(sock, SIOCGIFHWADDR, &ifr) == 0 ) {
 +                if(strstr(iter_if->ifa_name, "dpdk") != NULL) {
 +                    ret = GetPortIndex(iter_if->ifa_name);
                     for (j = 0; j < ETH_ALEN; j ++) {
 -                        CONFIG.eths[eidx].haddr[j] = ifr.ifr_addr.sa_data[j];
 +                        CONFIG.eths[eidx].haddr[j] = ports_eth_addr[ret].addr_bytes[j];
                     }
                 }

DPDK pktgen to generate SYN flood

hack patch to make pktgen to do syn flood:



diff --git a/app/cmd-functions.c b/app/cmd-functions.c
 index b2fda7c..c348e73 100644
 --- a/app/cmd-functions.c
 +++ b/app/cmd-functions.c
 @@ -303,6 +303,8 @@ const char *help_info[] = {
     "pkt.size max <portlist> value   - Set pkt size maximum address",
     "pkt.size inc <portlist> value   - Set pkt size increment address",
     "range <portlist> <state>      - Enable or Disable the given portlist for sending a range of packets",
 +    "range.proto <portlist> [tcp|udp|icmp]",
 +    "                  - Set ip proto for sending a range of packets",
     "",
     "<<PageBreak>>",
     "    Flags: P---------------- - Promiscuous mode enabled",
 diff --git a/app/pktgen-tcp.c b/app/pktgen-tcp.c
 index 3c8a853..9d12a88 100644
 --- a/app/pktgen-tcp.c
 +++ b/app/pktgen-tcp.c
 @@ -69,6 +69,26 @@
  #include "pktgen-tcp.h"
 +uint64_t xor_seed[ 2 ];
 +
 +static inline uint64_t
 +xor_next(void) {
 +    uint64_t s1 = xor_seed[ 0 ];
 +    const uint64_t s0 = xor_seed[ 1 ];
 +
 +    xor_seed[ 0 ] = s0;
 +    s1 ^= s1 << 23;                 /* a */
 +    return ( xor_seed[ 1 ] = ( s1 ^ s0 ^ ( s1 >> 17 ) ^ ( s0 >> 26 ) ) ) +
 +        s0;               /* b, c */
 +}
 +
 +static __inline__ uint32_t
 +pktgen_default_rnd_func(void)
 +{
 +    return xor_next();
 +}
 +
 +
  /**************************************************************************//**
  *
  * pktgen_tcp_hdr_ctor - TCP header constructor routine.
 @@ -100,10 +120,10 @@ pktgen_tcp_hdr_ctor(pkt_seq_t *pkt, tcpip_t *tip, int type __rte_unused)
     tip->tcp.sport   = htons(pkt->sport);
     tip->tcp.dport   = htons(pkt->dport);
 -    tip->tcp.seq    = htonl(DEFAULT_PKT_NUMBER);
 -    tip->tcp.ack    = htonl(DEFAULT_ACK_NUMBER);
 +    tip->tcp.seq    = htonl(pktgen_default_rnd_func());
 +    tip->tcp.ack    = 0;
     tip->tcp.offset   = ((sizeof(tcpHdr_t) / sizeof(uint32_t)) << 4);   /* Offset in words */
 -    tip->tcp.flags   = ACK_FLAG;                     /* ACK */
 +    tip->tcp.flags   = SYN_FLAG;                     /* ACK */
     tip->tcp.window   = htons(DEFAULT_WND_SIZE);
     tip->tcp.urgent   = 0;

root@pktgen-template:/home/admin/pktgen-dpdk/dpdk/examples/pktgen-dpdk# ./app/app/x86_64-native-linuxapp-gcc/pktgen -c ff   -- -P -m "[0:0-7].0 "

 Copyright (c) <2010-2016>, Intel Corporation. All rights reserved.
   Pktgen created by: Keith Wiles -- >>> Powered by Intel® DPDK <<<

Lua 5.3.2  Copyright (C) 1994-2015 Lua.org, PUC-Rio
>>> Packet Burst 32, RX Desc 512, TX Desc 512, mbufs/port 4096, mbuf cache 512

=== port to lcore mapping table (# lcores 8) ===
   lcore:     0     1     2     3     4     5     6     7
port   0:  D: T  0: 1  0: 1  0: 1  0: 1  0: 1  0: 1  0: 1 =  1: 8
Total   :  1: 1  0: 1  0: 1  0: 1  0: 1  0: 1  0: 1  0: 1
    Display and Timer on lcore 0, rx:tx counts per port/lcore

Configuring 1 ports, MBUF Size 1920, MBUF Cache Size 512
Lcore:
    0, RX-TX
                RX( 1): ( 0: 0)
                TX( 1): ( 0: 0)
    1, TX-Only
                TX( 1): ( 0: 1)
    2, TX-Only
                TX( 1): ( 0: 2)
    3, TX-Only
                TX( 1): ( 0: 3)
    4, TX-Only
                TX( 1): ( 0: 4)
    5, TX-Only
                TX( 1): ( 0: 5)
    6, TX-Only
                TX( 1): ( 0: 6)
    7, TX-Only
                TX( 1): ( 0: 7)

Port :
    0, nb_lcores  8, private 0x8f0690, lcores:  0  1  2  3  4  5  6  7



** Dev Info (rte_vmxnet3_pmd:0) **
   max_vfs        :   0 min_rx_bufsize    :1646 max_rx_pktlen : 16384 max_rx_queues         :  16 max_tx_queues:   8
   max_mac_addrs  :   1 max_hash_mac_addrs:   0 max_vmdq_pools:     0
   rx_offload_capa:  13 tx_offload_capa   :  45 reta_size     :     0 flow_type_rss_offloads:0000000000000514
   vmdq_queue_base:   0 vmdq_queue_num    :   0 vmdq_pool_base:     0
** RX Conf **
   pthreash       :   0 hthresh          :   0 wthresh        :     0
   Free Thresh    :   0 Drop Enable      :   0 Deferred Start :     0
** TX Conf **
   pthreash       :   0 hthresh          :   0 wthresh        :     0
   Free Thresh    :   0 RS Thresh        :   0 Deferred Start :     0 TXQ Flags:00000200

Initialize Port 0 -- TxQ 8, RxQ 1,  Src MAC 00:50:56:86:10:76

Pktgen > load tcp.txt

Pktgen> start 0

Pktgen> stop 0

root@pktgen-template:/home/admin/pktgen-dpdk/dpdk/examples/pktgen-dpdk# cat tcp.txt
#
# Pktgen - Ver: 2.9.17 (DPDK 16.04.0-rc2)
# Copyright (c) <2010-2016>, Intel Corporation. All rights reserved., Powered by Intel® DPDK

# Command line arguments: (DPDK args are defaults)
# ./app/app/x86_64-native-linuxapp-gcc/pktgen -c ff -n 3 -m 512 --proc-type primary -- -P -m [0:1-7].0

#######################################################################
# Pktgen Configuration script information:
#   GUI socket is Not Enabled
#   Flags 00040004
#   Number of ports: 1
#   Number ports per page: 4
#   Number descriptors: RX 512 TX: 512
#   Promiscuous mode is Enabled


#######################################################################
# Global configuration:
geometry 132x44
mac_from_arp disable

######################### Port  0 ##################################
#
# Port:  0, Burst: 32, Rate:100%, Flags:c0000010, TX Count:Forever
#           SeqCnt:0, Prime:1 VLAN ID:0001, Link:
#
# Set up the primary port information:
set 0 count 0
set 0 size 64
set 0 rate 100
set 0 burst 32
set 0 sport 1234
set 0 dport 5678
set 0 prime 1
type ipv4 0
proto tcp 0
set ip dst 0 10.1.72.17
#set ip dst 0 10.1.72.8
set ip src 0 10.1.72.154/24
set mac 0 00:23:E9:63:5B:83
#set mac 0 00:50:56:86:84:90
vlanid 0 1

pattern 0 zero
user.pattern 0 0123456789abcdef

latency 0 disable
mpls 0 disable
mpls_entry 0 0
qinq 0 disable
qinqids 0 0 0
gre 0 disable
gre_eth 0 disable
gre_key 0 0
#
# Port flag values:
icmp.echo 0 disable
pcap 0 disable
range 0 enable
process 0 disable
capture 0 disable
rxtap 0 disable
txtap 0 disable
vlan 0 disable

#
# Range packet information:
src.mac start 0 00:50:56:86:10:76
src.mac min 0 00:00:00:00:00:00
src.mac max 0 00:00:00:00:00:00
src.mac inc 0 00:00:00:00:00:00
dst.mac start 0 00:23:E9:63:5B:83
#dst.mac start 0 00:50:56:86:84:90
dst.mac min 0 00:00:00:00:00:00
dst.mac max 0 00:00:00:00:00:00
dst.mac inc 0 00:00:00:00:00:00

src.ip start 0 10.1.72.154
src.ip min 0 10.1.72.154
src.ip max 0 10.1.72.254
src.ip inc 0 0.0.0.1

dst.ip start 0 10.1.72.17
dst.ip min 0 10.1.72.17
dst.ip max 0 10.1.72.17
dst.ip inc 0 0.0.0.1

#dst.ip start 0 10.1.72.8
#dst.ip min 0 10.1.72.8
#dst.ip max 0 10.1.72.8
#dst.ip inc 0 0.0.0.1

src.port start 0 1025
src.port min 0 1025
src.port max 0 65512
src.port inc 0 1

dst.port start 0 80
dst.port min 0 0
dst.port max 0 0
dst.port inc 0 0

vlan.id start 0 1
vlan.id min 0 1
vlan.id max 0 4095
vlan.id inc 0 0

pkt.size start 0 64
pkt.size min 0 64
pkt.size max 0 1518
pkt.size inc 0 0

#
# Set up the sequence data for the port.
set 0 seqCnt 0

################################ Done #################################