Charles-François Natali added the comment:
Stupid question: why use scanf()/strtol() to parse an IP address, and not
simply inet_pton()/inet_aton(), which are made precisely for that purpose?
inet_pton() is POSIX (it was introduced at the same time as getaddrinfo(),
which is used unconditionally a couple lines below). If it's not available, we
could use inet_aton() as fallback (which is amusingly not POSIX, but I doubt
we'll find a platform with neither inet_pton() nor inet_aton()).
Using inet_pton() would have the added advantage of working with IPv6
addresses: right now, a numeric IPv6 address is always resolved by
getaddrinfo(), which results in a performance overhead:
$ python -m timeit -s "from socket import *; s = socket(AF_INET, SOCK_DGRAM);
DATA = 'hello'" "s.sendto(DATA, ('127.0.0.1', 42))"
100000 loops, best of 3: 6.86 usec per loop
$ python -m timeit -s "from socket import *; s = socket(AF_INET6, SOCK_DGRAM);
DATA = 'hello'" "s.sendto(DATA, ('::1', 42))"
10000 loops, best of 3: 24.2 usec per loop
----------
nosy: +neologix
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