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January 26, 2012June 29, 2016 by Jean-Luc Aufranc (CNXSoft) - 6 Comments

How to Find IP Address Ranges Owned by a Company

If you have a firewall, you may want to whitelist and/or blacklist some IPs depending in the origin. Usually it’s easy to find the owner of an IP address, but how can you find the IP address(es) registered by one specific company ? Let’s say you want to whitelist Technorati bot. A simple way is to go to http://bgp.he.net/ and enter the company name (e.g. technorati). It will return the IP list as follows: Result Description AS16936 Technorati, Inc. 208.66.66.0/23 Technorati, Inc. 208.66.65.0/24 Technorati, Inc. 208.66.64.0/24 Technorati, Inc. 208.66.64.0/22 Technorati, Inc. I understand the AS entries correspond to the Internet provider, and the IP address ranges can be added to your firewall (I use CloudFlare service) whitelist. Jean-Luc Aufranc (CNXSoft)Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in […]

December 12, 2011July 17, 2012 by Jean-Luc Aufranc (CNXSoft) - 3 Comments

Design West Summit – 26-29 March 2012

UBM Design announced the schedule and pass pricing for Design West Summit (previously Embedded System Conference) which will now bring 7 summits in one location (San Jose McEnery Convention Center) on 26-29 March 2012: Embedded Systems Conference & Exhibition – Conference Dates: March 26 – 29, 2012. Exhibition Dates: March 27-29, 2012. (See Details below) Android Summit – March 28, 2012 – Everything Android from embedded design to Apps development. Android Certification Program Android Speed Training Android Fundamentals Course on the Expo Floor Android Conference Program Multicore DevCon– March 27 & 28, 2012 – Embedded multicore and multimedia. 7th annual Multicore Conference Courses Multicore Expo Floor Zone Multicore Fundementals Courses Keynote Addresses Industry Addresses Expo floor parties and giveaways BlackHat – March 29, 2012 – One-day conference focused on security in embedded systems. Security Fundementals Course Black Hat Summit Conference Courses Security focused presentations in the expo floor theater Keynotes […]

November 16, 2011November 16, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

Embedded Hardware & Systems Trends for 2012 and Beyond

VDC Research currently has a research program called “STRATEGIC INSIGHTS 2012: EMBEDDED HARDWARE & SYSTEMS” where they analyze potential opportunities and give forecasts for embedded systems market through 2016. Some recent insights from their ongoing coverage of the Embedded Hardware & Systems market include: The Communications / Networking market is engaged in a period of dynamic change that is redefining the sector’s processing requirements. FPGAs & Linux are redefining embedded market growth requirements. The smart grid is creating new opportunities for embedded processors. Single board computers are enabling next-generation computing for military / aerospace applications. The Institute for Supply Management’s PMI index continues to demonstrate isolated pockets of regional growth, suggesting that new project starts and sustained unit shipments will maintain embedded market growth in 2012. The final reports should be available in 2012 as follows: TRACK 1: FASTFORWARD: INSIGHT FOR LEADERS Volume Number Volume Title Publication Date 1 Generating […]

October 31, 2011October 31, 2011 by Jean-Luc Aufranc (CNXSoft) - 3 Comments

Applied Micro X-Gene 64-Bit ARMv8 Server-on-Chip Presentation

Applied Micro Showcases World’s First 64-bit ARMv8 Core at ARM Techcon 2011, Santa Clara California. The day ARM announced the first 64-bit ARMv8 instruction set architecture, AppliedMicro unveiled the launch of the industry’s first 64-bit ARM “Server-on-a-Chip” solution. Most of the presentation is used to explain the competitive advantage this platform would bring including TCO reduced by 30%. There is also an (underwhelming) demonstration of X-Gene based on Xilinx Virtex-6 FPGA running Server SoC consisting of ARM-64 CPU complex, coherent CPU fabric, high performance I/O network, memory subsystem along with fully functional SoC subsystem. The FPGA platform and tools will be available for customer evaluation by the first half of 2012. Redhat will be in charge of implementing ARMv8 support in Linux and this will be part of Fedora for ARM in the future. The platform will run LAMP: Linux, Apache, MySQL and Perl/PHP/Python. The silicon will be available in […]

August 17, 2011July 18, 2012 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

ARM TechCon 2011: Software & System Design Schedule

ARM Technology Conference (TechCon) 2011 will be hosted in Santa Clara on the 25-27 October 2011. There will be many events and classes related to Chip Design and Software & System Design. The Software & System Design events will take place on the 26th and 27th October 2011. Here’s the schedule for Software & System Design events for the 26th of October: Time Class Track 11 am The 2012 Compute Subsystem Creating Smarter Systems 11 am Practical Cortex Debugging: Serial Wire Viewer and ETM Tracing Developing/Debugging 11 am Integrating a CMOS Imaging Sensor into an ARM-Based Embedded Application Human Interface Design 11 am Embedded IPv6 – Now is the time Networking & Connectivity 11 am RSA & AES Libraries protected against side-channel attacks Safety & Security 11 am Introduction to the ARM Architecture The Fundamentals of ARM 12 pm Optimizing SoC development through a common design foundation Creating Smarter Systems […]

April 21, 2011April 21, 2011 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Is it IPv6 Time ? IPv6 Basics on Linux

The first time I worked on IPv6 was in 2000 in my master’s degree thesis where I started an implementation of Mobile IP based on IPv6 in Linux Redhat. Over a decade later, IPv6 has not really taken off, even though we hear stories about the IPv4 address space running out and I have yet to see an embedded device using anything else than IPv4. APNIC Ran out of IPv4 However, this may be about the change as on the 15th of April 2011, Japan Network Information Center (JPNIC) announced that APNIC (Asia Pacific Network Information Centre) ran out of IPv4 addresses. They will still try to make it last longer by reusing previously allocated IPv4 and an “IPv4 address transfer system” whose details will be made available later. You can also see a chart based on IANA (Internet Assigned Numbers Authority) data that shows this is a problem right […]

April 5, 2011 by Jean-Luc Aufranc (CNXSoft) - No Comments

C Code to get MAC Address and IP Address

Function in C to return the MAC Address:

/* Returns the MAC Address
   Params: int iNetType - 0: ethernet, 1: Wifi
           char chMAC[6] - MAC Address in binary format
   Returns: 0: success
           -1: Failure
    */
int getMACAddress(int iNetType, char chMAC[6]) {
  struct ifreq ifr;
  int sock;
  char *ifname=NULL;

  if (!iNetType) {
    ifname="eth0"; /* Ethernet */
  } else {
    ifname="wlan0"; /* Wifi */
  }
  sock=socket(AF_INET,SOCK_DGRAM,0);
  strcpy( ifr.ifr_name, ifname );
  ifr.ifr_addr.sa_family = AF_INET;
  if (ioctl( sock, SIOCGIFHWADDR, &amp;ifr ) &lt; 0) {
    return -1;
  }
  memcpy(chMAC, ifr.ifr_hwaddr.sa_data, 6)
  close(sock);
  return 0;
}

/* Returns the MAC Address

Params: int iNetType - 0: ethernet, 1: Wifi

char chMAC[6] - MAC Address in binary format

Returns: 0: success

-1: Failure

int getMACAddress(int iNetType, char chMAC[6]) {

struct ifreq ifr;

int sock;

char *ifname=NULL;

if (!iNetType) {

ifname="eth0"; /* Ethernet */

} else {

ifname="wlan0"; /* Wifi */

}

sock=socket(AF_INET,SOCK_DGRAM,0);

strcpy( ifr.ifr_name, ifname );

ifr.ifr_addr.sa_family = AF_INET;

if (ioctl( sock, SIOCGIFHWADDR, &ifr ) < 0) {

return -1;

}

memcpy(chMAC, ifr.ifr_hwaddr.sa_data, 6)

close(sock);

return 0;

}

Function in C to return the IP Address:

/* Returns the interface IP Address
   Params: int iNetType - 0: ethernet, 1: Wifi
           char *chIP - IP Address string
   Return: 0: success / -1: Failure
    */
int getIpAddress(int iNetType, char chIP[16]) {
  struct ifreq ifr;
  int sock = 0;

  sock = socket(AF_INET, SOCK_DGRAM, 0);
  if(iNetType == 0) {
    strcpy(ifr.ifr_name, "eth0");
  } else {
    strcpy(ifr.ifr_name, "wlan0");
  }
  if (ioctl(sock, SIOCGIFADDR, &amp;ifr) &lt; 0) {
    strcpy(chIP, "0.0.0.0");
    return -1;
 }
 sprintf(chIP, "%s", inet_ntoa(((struct sockaddr_in *) &amp;(ifr.ifr_addr))-&gt;sin_addr));
 close(sock);
 return 0;
}

/* Returns the interface IP Address

Params: int iNetType - 0: ethernet, 1: Wifi

char *chIP - IP Address string

Return: 0: success / -1: Failure

int getIpAddress(int iNetType, char chIP[16]) {

struct ifreq ifr;

int sock = 0;

sock = socket(AF_INET, SOCK_DGRAM, 0);

if(iNetType == 0) {

strcpy(ifr.ifr_name, "eth0");

} else {

strcpy(ifr.ifr_name, "wlan0");

}

if (ioctl(sock, SIOCGIFADDR, &ifr) < 0) {

strcpy(chIP, "0.0.0.0");

return -1;

}

sprintf(chIP, "%s", inet_ntoa(((struct sockaddr_in *) &(ifr.ifr_addr))->sin_addr));

close(sock);

return 0;

}

Jean-Luc Aufranc (CNXSoft)Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011. www.cnx-software.com

October 25, 2010October 25, 2010 by Jean-Luc Aufranc (CNXSoft) - No Comments

Finding a device IP Address

If you are developing software for an Ethernet (or Wifi) device, you’ll need to access the board for debugging and/or testing purpose. If your board does not have user interface or the serial port is not available, you’ll have to find the IP address (assuming it is using DHCP) before accessing the board thru telnet or ssh. A simple way to do that is to ping the broadcast address and check the arp table. > ping -b 192.168.0.255 WARNING: pinging broadcast address PING 192.168.0.255 (192.168.0.255) 56(84) bytes of data. 64 bytes from 192.168.0.246: icmp_seq=0 ttl=64 time=0.018 ms 64 bytes from 192.168.0.101: icmp_seq=0 ttl=64 time=0.217 ms (DUP!) 64 bytes from 192.168.0.246: icmp_seq=1 ttl=64 time=0.023 ms > arp -i eth0 arp -i eth1 Address HWtype HWaddress Flags Mask Iface 192.168.0.103 ether 00:50:FC:00:00:01 C eth1 192.168.0.109 ether 00:13:20:01:01:01 C eth1 If you cannot find your device, it may be configured to […]