snaproute Go BGP Code Dive (14): First Steps in Processing an Update
In the last post on this topic, we found the tail of the update chain. The actual event appears to be processed here—
case BGPEventUpdateMsg:
st.fsm.StartHoldTimer()
bgpMsg := data.(*packet.BGPMessage)
st.fsm.ProcessUpdateMessage(bgpMsg)—which is found around line 734 of fsm.go. The second line of code in this snippet is interesting; it’s a little difficult to understand what it’s actually doing. There are three crucial elements to figuring out what is going on here—
:=, in go, is a way of appending the information in a data structure with more information. So, for instance, if you do something like this—
a-string = "this is a"
a-string := " string"
The result, in a-string, is this is a string. Whatever else this snippet is doing, then, it is taking something out of the data structure, and appending it to the bgpMsg structure. What, precisely, is it taking from the data structure?
The * (asterisk) is a way to reference a pointer within a structure. We’ve not talked about pointers before, so it’s worth spending just a moment with them. The illustration below will help a bit.
Each letter in the string “this is a string” Continue reading
Vodafone Uses Nokia Gear to Test Cloud RAN
Operator says test proved cloud RAN can provide same level of service as traditional networks.
ITC Judge Finds Arista Infringed 2 More Cisco Patents
The companies spar in federal court this week, too.
Caching Anonymous Page Views
M42 Smart Motorway in the West Midlands, UK; courtesy of Highways England.
The load time of your website not only affects your search engine rankings, but is also correlated to the conversion rate on your site:
- Walmart.com found that for every 1 second of page speed improvement, they experienced a 2% increase in conversion rate.
- Greg Linden's presentation Make Data Useful demonstrated through A/B Testing every 100ms in page load time delays led to a 1% loss of sales for Amazon.
- Kyle Rush from the 2011 Obama for America campaign site showed a 3 second page load speed improvement increased on-site donations by 14% (resulting in over $34 million in donations).
Cloudflare is determined to help website administrators boost the performance of their websites. From today, Cloudflare users on our Business plan will gain a previously Enterprise-only Page Rule option, “Bypass Cache on Cookie”. When used in conjunction with a “Cache Everything” Page Rule, this setting allows for websites to cache the HTML of anonymous page visits without affecting dynamic content.
By caching anonymous page views, Cloudflare is able to help ensure that your origin webserver doesn't waste time constantly regenerating pages which change rarely. This ultimately allows us Continue reading
SD-WAN is Wonderful, But Should Be Accompanied by SD-Security
Enterprises and service providers are evaluating SD-security solutions today.