getnameinfo()

• int getnameinfo(const struct sockaddr *sa, socklen_t salen,

• char *host, socklen_t hostlen,

• char *serv, socklen_t servlen,

• int flags);

• #define NI_MAXHOST 1025

• #define NI_MAXSERV 32

• Address-to-name translation function

• Extract node name, service name from socket address structure and put in human readable format

• Not an address structure but a socket address structure

  • support scope architecture
    • e.g. “ff02::1%link0”, “fec0::1%site0”

• MT-Safe

• NI_MAXHOST, NI_MAXSERV: size enough for host, serv

Notes: