> From: Stephen Hemminger [mailto:step...@networkplumber.org] > Sent: Wednesday, 15 December 2021 04.21 > > On Wed, 15 Dec 2021 01:06:14 +0000 > "Ananyev, Konstantin" <konstantin.anan...@intel.com> wrote: > > > > -----Original Message----- > > > From: Morten Brørup <m...@smartsharesystems.com> > > > Sent: Tuesday, December 14, 2021 5:31 PM > > > To: Randles, Ronan <ronan.rand...@intel.com>; dev@dpdk.org > > > Cc: Van Haaren, Harry <harry.van.haa...@intel.com> > > > Subject: RE: [PATCH 02/12] net: add function to pretty print IPv4 > > > > > > > From: Ronan Randles [mailto:ronan.rand...@intel.com] > > > > Sent: Tuesday, 14 December 2021 15.13 > > > > > > > > This function accepts an uint32_t representation of an IP address > and > > > > produces a string representation stored in a char * buffer. > Realavent > > > > unit tests also included. > > > > > > > > Signed-off-by: Ronan Randles <ronan.rand...@intel.com> > > > > > > [snip] > > > > > > > diff --git a/lib/net/rte_ip.h b/lib/net/rte_ip.h > > > > index 188054fda4..e46f0b41ba 100644 > > > > --- a/lib/net/rte_ip.h > > > > +++ b/lib/net/rte_ip.h > > > > @@ -444,6 +444,26 @@ __rte_experimental > > > > int32_t > > > > rte_ip_parse_addr(const char *src_ip, uint32_t *output_addr); > > > > > > > > + > > > > +/** > > > > + * Print IP address from 32 bit int into char * buffer. > > > > + * > > > > + * @param ip_addr > > > > + * ip address to be printed. > > > > + * @param buffer > > > > + * The buffer the string will be saved into. > > > > + * @param buffer_size > > > > + * size of buffer to be used. > > > > + * > > > > + * @retval 0 > > > > + * Success. > > > > + * @retval -1 > > > > + * Failure due to invalid input arguments. > > > > + */ > > > > +__rte_experimental > > > > +int32_t > > > > +rte_ip_print_addr(uint32_t ip_addr, char *buffer, uint32_t > > > > buffer_size); > > > > + > > > > > > In continuation of my email reply about the IPv4 parse function... > > > > > > I have a few suggestions to the IPv4 print function too: > > > > > > The return value should be the number of characters written to the > output string, and still -1 on error. With this modification, you could > > > use the return type ssize_t instead of int32_t. > > > > > > Furthermore, I would prefer having the parameters in the same order > as snprintf(): char *str, size_t size, const uint32_t ip_addr. Please > > > also notice the suggested changed type for the size, and the const > added to the ip_addr. > > > > > Honestly, I don't understand why we need to introduce such functions > > inside DPDK at all. > > What's wrong with existing standard ones: inet_ntop() and > inet_pton()? > > Agreed, I see no added value in reinventing here
I think that DPDK functions for converting all sorts of types to/from strings would be useful; not only IP addresses, but also MAC addresses, TCP/UDP port numbers and VLAN IDs. If you don't like IP address string conversion functions in the net library, DPDK could have a string conversions library. That library could expose a multitude of APIs for the same purpose, so the application can use the API that best fits each application use.
