> But when porting applications from BSD to Linux, how to circumvent this
> problem?
> In linux: /usr/include/bits/sockaddr.h:
> #define SA_LEN(_x)
>
> But it seems that this is not usable when trying to convert something
> like ifrp->ifr_addr.sa_len , and how about sin_len?
We have no notion of sa_len. Linux is compatible with the traditional socket interface
not with the 4.4BSD extensions. POSIX 1003.1g draft 6.5 says sa_len is optional. We
opt not to have it
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