NE_ADDR_RESOLVE(3) neon API reference NE_ADDR_RESOLVE(3) NAME ne_addr_resolve, ne_addr_result, ne_addr_first, ne_addr_next, ne_addr_er- ror, ne_addr_destroy - functions to resolve hostnames to addresses SYNOPSIS #include <ne_socket.h> ne_sock_addr *ne_addr_resolve(const char *hostname, int flags); int ne_addr_result(const ne_sock_addr *addr); const ne_inet_addr *ne_addr_first(ne_sock_addr *addr); const ne_inet_addr *ne_addr_next(ne_sock_addr *addr); char *ne_addr_error(const ne_sock_addr *addr, char *buffer, size_t bufsiz); void ne_addr_destroy(ne_sock_addr *addr); DESCRIPTION The ne_addr_resolve function resolves the given hostname, returning an ne_sock_addr object representing the address (or addresses) associated with the hostname. The flags parameter is currently unused, and must be passed as 0. The hostname passed to ne_addr_resolve can be a DNS hostname (e.g. "www.example.com") or an IPv4 dotted quad (e.g. "192.0.34.72"); or, on systems which support IPv6, an IPv6 hex address, which may be enclosed in brackets, e.g. "[::1]". To determine whether the hostname was successfully resolved, the ne_addr_result function is used, which returns non-zero if an error oc- curred. If an error did occur, the ne_addr_error function can be used, which will copy the error string into a given buffer (of size bufsiz). The functions ne_addr_first and ne_addr_next are used to retrieve the In- ternet addresses associated with an address object which has been success- fully resolved. ne_addr_first returns the first address; ne_addr_next re- turns the next address after the most recent call to ne_addr_next or ne_addr_first, or NULL if there are no more addresses. The ne_inet_addr pointer returned by these functions can be passed to ne_sock_connect to connect a socket. After the address object has been used, it should be destroyed using ne_addr_destroy. RETURN VALUE ne_addr_resolve returns a pointer to an address object, and never NULL. ne_addr_error returns the buffer parameter . EXAMPLES The code below prints out the set of addresses associated with the hostname www.google.com. ne_sock_addr *addr; char buf[256]; addr = ne_addr_resolve("www.google.com", 0); if (ne_addr_result(addr)) { printf("Could not resolve www.google.com: %s\n", ne_addr_error(addr, buf, sizeof buf)); } else { const ne_inet_addr *ia; printf("www.google.com:"); for (ia = ne_addr_first(addr); ia != NULL; ia = ne_addr_next(addr)) { printf(" %s", ne_iaddr_print(ia, buf, sizeof buf)); } putchar('\n'); } ne_addr_destroy(addr); SEE ALSO ne_iaddr_print COPYRIGHT Copyright (C) 2001-2024 Joe Orton neon 0.34.0 23 November 2024 NE_ADDR_RESOLVE(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | EXAMPLES | SEE ALSO | COPYRIGHT
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