Guy, On 29 November 2007 Guy Harris wrote: > > The format of the capture is a 5-byte pseudo header followed by the > > actual I2C data. The MS bit of 1st byte of pseudo-header indicates > > whether the packet contains data or is an event detected on the I2C > > controller. The remaining 7 bits contain the minor number of the > > I2C device that generated the packet. The next 4 bytes contain > > either message flags, or controller status bits, as defined in > > <linux/i2c.h> and <linux/i2c-dev.h> headers. > > So are those 4 bytes Linux-specific, or are they likely to be used if > a different OS were to support capturing on IPMB? If they're > Linux-specific, DLT_I2C_LINUX might be a better name.
They bit values are not specific themselves (e.g. status bits include "Controller lost attachment to bus", "Controller had promiscuous mode set/cleared", etc) - most likely, these bits will be available on different OS, too. However, the definitions of these status bits match those in Linux. DLT_I2C_LINUX is perfectly fine, too. Best regards, Alexey. - This is the tcpdump-workers list. Visit https://cod.sandelman.ca/ to unsubscribe.
