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#include <netdb.h>
#include <errno.h>
#include <stdlib.h>
#include <wasi/sockets_utils.h>
_Thread_local int h_errno = 0;
static int map_error(ip_name_lookup_error_code_t error)
{
switch (error) {
case NETWORK_ERROR_CODE_OUT_OF_MEMORY:
return EAI_MEMORY;
case NETWORK_ERROR_CODE_NAME_UNRESOLVABLE:
return EAI_NONAME;
case NETWORK_ERROR_CODE_TEMPORARY_RESOLVER_FAILURE:
return EAI_AGAIN;
case NETWORK_ERROR_CODE_PERMANENT_RESOLVER_FAILURE:
return EAI_FAIL;
default:
errno = __wasi_sockets_utils__map_error(error);
return EAI_SYSTEM;
}
}
static int add_addr(ip_name_lookup_option_ip_address_t address,
const struct addrinfo *restrict hint,
struct addrinfo **restrict current,
struct addrinfo **restrict res)
{
int family;
struct sockaddr *addr;
socklen_t addrlen;
switch (address.val.tag) {
case NETWORK_IP_ADDRESS_IPV4: {
if (hint && hint->ai_family != AF_UNSPEC &&
hint->ai_family != AF_INET) {
return 0;
}
network_ipv4_address_t ip = address.val.val.ipv4;
family = PF_INET;
addrlen = sizeof(struct sockaddr_in);
addr = malloc(addrlen);
if (addr == NULL) {
freeaddrinfo(*res);
return EAI_MEMORY;
}
struct sockaddr_in sockaddr = {
.sin_family = AF_INET,
.sin_port = 0,
.sin_addr = { .s_addr = ip.f0 | (ip.f1 << 8) |
(ip.f2 << 16) | (ip.f3 << 24) },
};
memcpy(addr, &sockaddr, addrlen);
break;
}
case NETWORK_IP_ADDRESS_IPV6: {
if (hint && hint->ai_family != AF_UNSPEC &&
hint->ai_family != AF_INET6) {
return 0;
}
network_ipv6_address_t ip = address.val.val.ipv6;
family = PF_INET6;
addrlen = sizeof(struct sockaddr_in6);
addr = malloc(addrlen);
if (addr == NULL) {
freeaddrinfo(*res);
return EAI_MEMORY;
}
struct sockaddr_in6 sockaddr = {
.sin6_family = AF_INET6,
.sin6_port = 0,
.sin6_addr = {
.s6_addr = {
ip.f0 >> 8,
ip.f0 & 0xFF,
ip.f1 >> 8,
ip.f1 & 0xFF,
ip.f2 >> 8,
ip.f2 & 0xFF,
ip.f3 >> 8,
ip.f3 & 0xFF,
ip.f4 >> 8,
ip.f4 & 0xFF,
ip.f5 >> 8,
ip.f5 & 0xFF,
ip.f6 >> 8,
ip.f6 & 0xFF,
ip.f7 >> 8,
ip.f7 & 0xFF,
} },
.sin6_flowinfo = 0,
.sin6_scope_id = 0,
};
memcpy(addr, &sockaddr, addrlen);
break;
}
default: /* unreachable */
abort();
}
struct addrinfo *result = malloc(sizeof(struct addrinfo));
if (result == NULL) {
freeaddrinfo(*res);
return EAI_MEMORY;
}
*result = (struct addrinfo){
.ai_family = family,
.ai_flags = 0,
.ai_socktype = SOCK_STREAM,
.ai_protocol = 0,
.ai_addrlen = addrlen,
.ai_addr = addr,
.ai_canonname = NULL,
.ai_next = NULL,
};
if (*current) {
(*current)->ai_next = result;
*current = result;
} else {
*current = result;
*res = result;
}
return 0;
}
int getaddrinfo(const char *restrict host, const char *restrict serv,
const struct addrinfo *restrict hint,
struct addrinfo **restrict res)
{
if (host == NULL) {
host = "localhost";
}
*res = NULL;
struct addrinfo *current = NULL;
wasip2_string_t name = { .ptr = (uint8_t *)host, .len = strlen(host) };
ip_name_lookup_own_resolve_address_stream_t stream;
ip_name_lookup_error_code_t error;
if (ip_name_lookup_resolve_addresses(
__wasi_sockets_utils__borrow_network(), &name, &stream,
&error)) {
ip_name_lookup_borrow_resolve_address_stream_t stream_borrow =
ip_name_lookup_borrow_resolve_address_stream(stream);
while (true) {
ip_name_lookup_option_ip_address_t address;
if (ip_name_lookup_method_resolve_address_stream_resolve_next_address(
stream_borrow, &address, &error)) {
if (address.is_some) {
int error = add_addr(address, hint,
¤t, res);
if (error) {
return error;
}
} else {
return 0;
}
} else if (error == NETWORK_ERROR_CODE_WOULD_BLOCK) {
ip_name_lookup_own_pollable_t pollable =
ip_name_lookup_method_resolve_address_stream_subscribe(
stream_borrow);
poll_borrow_pollable_t pollable_borrow =
poll_borrow_pollable(pollable);
poll_method_pollable_block(pollable_borrow);
poll_pollable_drop_own(pollable);
} else {
freeaddrinfo(*res);
return map_error(error);
}
}
} else {
return map_error(error);
}
}
void freeaddrinfo(struct addrinfo *p)
{
while (p) {
struct addrinfo *next = p->ai_next;
free(p->ai_addr);
free(p);
p = next;
}
}
int getnameinfo(const struct sockaddr *restrict sa, socklen_t salen,
char *restrict host, socklen_t hostlen, char *restrict serv,
socklen_t servlen, int flags)
{
// TODO wasi-sockets
abort();
}
struct hostent *gethostbyname(const char *name)
{
// TODO wasi-sockets
return NULL;
}
struct hostent *gethostbyaddr(const void *addr, socklen_t len, int type)
{
// TODO wasi-sockets
return NULL;
}
const char *hstrerror(int err)
{
// TODO wasi-sockets
return "hstrerror: TODO";
}
struct servent *getservbyname(const char *name, const char *proto)
{
// TODO wasi-sockets
return NULL;
}
struct servent *getservbyport(int port, const char *proto)
{
// TODO wasi-sockets
return NULL;
}
struct protoent *getprotobyname(const char *name)
{
// TODO wasi-sockets
return NULL;
}
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