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inet_pton(3) Linux Programmer's Manual inet_pton(3)
inet_pton - Create a network address structure
int inet_pton(int af, const char *src, void *dst);
This function converts the character string src into a network address
structure in the af address family, then copies the network address
structure to dst.
inet_pton(3) extends the inet_addr(3) function to support multiple
address families, inet_addr(3) is now considered to be deprecated in
favor of inet_pton(3). The following address families are currently
src points to a character string containing an IPv4 network
address in the dotted-quad format, "ddd.ddd.ddd.ddd". The
address is converted to a struct in_addr and copied to dst,
which must be sizeof(struct in_addr) bytes long.
src points to a character string containing an IPv6 network
address in any allowed IPv6 address format. The address is con-
verted to a struct in6_addr and copied to dst, which must be
sizeof(struct in6_addr) bytes long.
Certain legacy hex and octal formats of AF_INET addresses are not sup-
ported by inet_pton(), which rejects them.
inet_pton() returns a negative value and sets errno to EAFNOSUPPORT if
af does not contain a valid address family. 0 is returned if src does
not contain a character string representing a valid network address in
the specified address family. A positive value is returned if the net-
work address was successfully converted.
AF_INET6 does not recognize IPv4 addresses. An explicit IPv6-mapped
IPv4 address must be supplied in src instead.
Linux Man Page 2000-12-18 inet_pton(3)
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