libs6dns
s6-dns
Software
skarnet.org
The following functions and structures are declared in the s6-dns/s6dns-fmt.h header, and implemented in the libs6dns.a or libs6dns.so library.
s6dns_fmt provides primitives to format RR contents into printable strings.
unsigned int s6dns_fmt_domain (char *s, unsigned int max, s6dns_domain_t const *d)
Writes into string s the domain contained in *d (in string
form). Returns the number of bytes written, or 0 in case of failure. If
the output would be more than max bytes, 0 ENAMETOOLONG is returned.
To avoid that, S6DNS_FMT_DOMAIN is a suitable number of bytes to preallocate s.
This function is actually an alias to s6dns_domain_tostring.
unsigned int s6dns_fmt_domainlist (char *s, unsigned int max, s6dns_domain_t const *list, unsigned int n, char const *delin, unsigned int delimlen)
Writes into string s the list of n domains (in string form)
pointed to by list. Between each domain (and not after the last one),
string delim of length delimlen is appended.
The function returns the number of bytes written, or 0 in case of failure. If
the output would be more than max bytes, 0 ENAMETOOLONG is returned.
To avoid that, S6DNS_FMT_DOMAINLIST(n) is a suitable number of bytes to preallocate s.
unsigned int s6dns_fmt_hinfo (char *s, unsigned int max, s6dns_message_rr_hinfo_t const *p)
Writes into string s the HINFO contained in *p: cpu, then os,
separated by a space.
Returns the number of bytes written, or 0 in case of failure. If
the output would be more than max bytes, 0 ENAMETOOLONG is returned.
To avoid that, S6DNS_FMT_HINFO is a suitable number of bytes to preallocate s.
unsigned int s6dns_fmt_mx (char *s, unsigned int max, s6dns_message_rr_mx_t const *p)
Writes into string s the MX contained in *p: preference, then
exchanger name, separated by a space.
Returns the number of bytes written, or 0 in case of failure. If
the output would be more than max bytes, 0 ENAMETOOLONG is returned.
To avoid that, S6DNS_FMT_MX is a suitable number of bytes to preallocate s.
unsigned int s6dns_fmt_soa (char *s, unsigned int max, s6dns_message_rr_soa_t const *p)
Writes into string s the SOA contained in *p:
mname, then rname, then serial number, refresh time, retry time, expiration time
and minimum time, separated by spaces.
Returns the number of bytes written, or 0 in case of failure. If
the output would be more than max bytes, 0 ENAMETOOLONG is returned.
To avoid that, S6DNS_FMT_SOA is a suitable number of bytes to preallocate s.
unsigned int s6dns_fmt_srv (char *s, unsigned int max, s6dns_message_rr_srv_t const *p)
Writes into string s the SRV contained in *p: priority,
then weight, then port, then target, separated by spaces.
Returns the number of bytes written, or 0 in case of failure. If
the output would be more than max bytes, 0 ENAMETOOLONG is returned.
To avoid that, S6DNS_FMT_SRV is a suitable number of bytes to preallocate s.