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ruby/ext/socket/ipsocket.c
Takashi Kokubun 319c3c7038 merge revision(s) 1683dadb19: [Backport #21088] 
Do not save ResolutionError if resolution succeeds for any address family (#12678)

	* Do not save ResolutionError if resolution succeeds for any address family

	Socket with Happy Eyeballs Version 2 performs connection attempts and name resolution in parallel.

	In the existing implementation, if a connection attempt failed for one address family while name resolution was still in progress for the other, and that name resolution later failed, the method would terminate with a name resolution error.
	This behavior was intended to ensure that the final error reflected the most recent failure, potentially overriding an earlier error.

	However, [Bug #21088](https://bugs.ruby-lang.org/issues/21088) made me realize that terminating with a name resolution error is unnatural when name resolution succeeded for at least one address family.

	This PR modifies the behavior so that if name resolution succeeds for one address family, any name resolution error from the other is not saved.

	This PR includes the following changes:

	* Do not display select(2) as the system call that caused the raised error, as it is for internal processing

	* Fix bug: Get errno with Socket::SO_ERROR in Windows environment with a workaround for tests not passing
2025-02-13 21:13:47 -08:00

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/************************************************
ipsocket.c -
created at: Thu Mar 31 12:21:29 JST 1994
Copyright (C) 1993-2007 Yukihiro Matsumoto
************************************************/
#include "rubysocket.h"
#include <stdio.h>
struct inetsock_arg
{
VALUE self;
VALUE io;
struct {
VALUE host, serv;
struct rb_addrinfo *res;
} remote, local;
int type;
VALUE resolv_timeout;
VALUE connect_timeout;
};
static VALUE
inetsock_cleanup(VALUE v)
{
struct inetsock_arg *arg = (void *)v;
if (arg->remote.res) {
rb_freeaddrinfo(arg->remote.res);
arg->remote.res = 0;
}
if (arg->local.res) {
rb_freeaddrinfo(arg->local.res);
arg->local.res = 0;
}
if (arg->io != Qnil) {
rb_io_close(arg->io);
arg->io = Qnil;
}
return Qnil;
}
static VALUE
init_inetsock_internal(VALUE v)
{
struct inetsock_arg *arg = (void *)v;
int error = 0;
int type = arg->type;
struct addrinfo *res, *lres;
int status = 0, local = 0;
int family = AF_UNSPEC;
const char *syscall = 0;
VALUE connect_timeout = arg->connect_timeout;
arg->remote.res = rsock_addrinfo(arg->remote.host, arg->remote.serv,
family, SOCK_STREAM,
(type == INET_SERVER) ? AI_PASSIVE : 0);
/*
* Maybe also accept a local address
*/
if (type != INET_SERVER && (!NIL_P(arg->local.host) || !NIL_P(arg->local.serv))) {
arg->local.res = rsock_addrinfo(arg->local.host, arg->local.serv,
family, SOCK_STREAM, 0);
}
VALUE io = Qnil;
for (res = arg->remote.res->ai; res; res = res->ai_next) {
#if !defined(INET6) && defined(AF_INET6)
if (res->ai_family == AF_INET6)
continue;
#endif
lres = NULL;
if (arg->local.res) {
for (lres = arg->local.res->ai; lres; lres = lres->ai_next) {
if (lres->ai_family == res->ai_family)
break;
}
if (!lres) {
if (res->ai_next || status < 0)
continue;
/* Use a different family local address if no choice, this
* will cause EAFNOSUPPORT. */
lres = arg->local.res->ai;
}
}
status = rsock_socket(res->ai_family,res->ai_socktype,res->ai_protocol);
syscall = "socket(2)";
if (status < 0) {
error = errno;
continue;
}
int fd = status;
io = arg->io = rsock_init_sock(arg->self, fd);
if (type == INET_SERVER) {
#if !defined(_WIN32) && !defined(__CYGWIN__)
status = 1;
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
(char*)&status, (socklen_t)sizeof(status));
#endif
status = bind(fd, res->ai_addr, res->ai_addrlen);
syscall = "bind(2)";
}
else {
if (lres) {
#if !defined(_WIN32) && !defined(__CYGWIN__)
status = 1;
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
(char*)&status, (socklen_t)sizeof(status));
#endif
status = bind(fd, lres->ai_addr, lres->ai_addrlen);
local = status;
syscall = "bind(2)";
}
if (status >= 0) {
status = rsock_connect(io, res->ai_addr, res->ai_addrlen, (type == INET_SOCKS), connect_timeout);
syscall = "connect(2)";
}
}
if (status < 0) {
error = errno;
arg->io = Qnil;
rb_io_close(io);
io = Qnil;
continue;
} else {
break;
}
}
if (status < 0) {
VALUE host, port;
if (local < 0) {
host = arg->local.host;
port = arg->local.serv;
} else {
host = arg->remote.host;
port = arg->remote.serv;
}
rsock_syserr_fail_host_port(error, syscall, host, port);
}
// Don't close the socket in `inetsock_cleanup` if we are returning it:
arg->io = Qnil;
if (type == INET_SERVER && io != Qnil) {
status = listen(rb_io_descriptor(io), SOMAXCONN);
if (status < 0) {
error = errno;
rb_io_close(io);
rb_syserr_fail(error, "listen(2)");
}
}
/* create new instance */
return io;
}
#if FAST_FALLBACK_INIT_INETSOCK_IMPL == 0
VALUE
rsock_init_inetsock(VALUE self, VALUE remote_host, VALUE remote_serv, VALUE local_host, VALUE local_serv, int type, VALUE resolv_timeout, VALUE connect_timeout, VALUE _fast_fallback, VALUE _test_mode_settings)
{
struct inetsock_arg arg;
arg.self = self;
arg.io = Qnil;
arg.remote.host = remote_host;
arg.remote.serv = remote_serv;
arg.remote.res = 0;
arg.local.host = local_host;
arg.local.serv = local_serv;
arg.local.res = 0;
arg.type = type;
arg.resolv_timeout = resolv_timeout;
arg.connect_timeout = connect_timeout;
return rb_ensure(init_inetsock_internal, (VALUE)&arg,
inetsock_cleanup, (VALUE)&arg);
}
#elif FAST_FALLBACK_INIT_INETSOCK_IMPL == 1
#define IPV6_ENTRY_POS 0
#define IPV4_ENTRY_POS 1
#define RESOLUTION_ERROR 0
#define SYSCALL_ERROR 1
static int
is_specified_ip_address(const char *hostname)
{
if (!hostname) return false;
struct in_addr ipv4addr;
struct in6_addr ipv6addr;
return (inet_pton(AF_INET6, hostname, &ipv6addr) == 1 ||
inet_pton(AF_INET, hostname, &ipv4addr) == 1);
}
struct fast_fallback_inetsock_arg
{
VALUE self;
VALUE io;
struct {
VALUE host, serv;
struct rb_addrinfo *res;
} remote, local;
int type;
VALUE resolv_timeout;
VALUE connect_timeout;
const char *hostp, *portp;
int *families;
int family_size;
int additional_flags;
struct fast_fallback_getaddrinfo_entry *getaddrinfo_entries[2];
struct fast_fallback_getaddrinfo_shared *getaddrinfo_shared;
rb_fdset_t readfds, writefds;
int wait;
int connection_attempt_fds_size;
int *connection_attempt_fds;
VALUE test_mode_settings;
};
static struct fast_fallback_getaddrinfo_shared *
allocate_fast_fallback_getaddrinfo_shared(int family_size)
{
struct fast_fallback_getaddrinfo_shared *shared;
shared = (struct fast_fallback_getaddrinfo_shared *)calloc(
1,
sizeof(struct fast_fallback_getaddrinfo_shared) + (family_size == 1 ? 0 : 2) * sizeof(struct fast_fallback_getaddrinfo_entry)
);
return shared;
}
static void
allocate_fast_fallback_getaddrinfo_hints(struct addrinfo *hints, int family, int remote_addrinfo_hints, int additional_flags)
{
MEMZERO(hints, struct addrinfo, 1);
hints->ai_family = family;
hints->ai_socktype = SOCK_STREAM;
hints->ai_protocol = IPPROTO_TCP;
hints->ai_flags = remote_addrinfo_hints;
hints->ai_flags |= additional_flags;
}
static int*
allocate_connection_attempt_fds(int additional_capacity)
{
int *fds = (int *)malloc(additional_capacity * sizeof(int));
if (!fds) rb_syserr_fail(errno, "malloc(3)");
for (int i = 0; i < additional_capacity; i++) fds[i] = -1;
return fds;
}
static int
reallocate_connection_attempt_fds(int **fds, int current_capacity, int additional_capacity)
{
int new_capacity = current_capacity + additional_capacity;
int *new_fds;
new_fds = realloc(*fds, new_capacity * sizeof(int));
if (new_fds == NULL) {
rb_syserr_fail(errno, "realloc(3)");
}
*fds = new_fds;
for (int i = current_capacity; i < new_capacity; i++) (*fds)[i] = -1;
return new_capacity;
}
struct hostname_resolution_result
{
struct addrinfo *ai;
int finished;
int has_error;
};
struct hostname_resolution_store
{
struct hostname_resolution_result v6;
struct hostname_resolution_result v4;
int is_all_finised;
};
static int
any_addrinfos(struct hostname_resolution_store *resolution_store)
{
return resolution_store->v6.ai || resolution_store->v4.ai;
}
static struct timespec
current_clocktime_ts(void)
{
struct timespec ts;
if ((clock_gettime(CLOCK_MONOTONIC, &ts)) < 0) {
rb_syserr_fail(errno, "clock_gettime(2)");
}
return ts;
}
static void
set_timeout_tv(struct timeval *tv, long ms, struct timespec from)
{
long sec = ms / 1000;
long nsec = (ms % 1000) * 1000000;
long result_sec = from.tv_sec + sec;
long result_nsec = from.tv_nsec + nsec;
result_sec += result_nsec / 1000000000;
result_nsec = result_nsec % 1000000000;
tv->tv_sec = result_sec;
tv->tv_usec = (int)(result_nsec / 1000);
}
static struct timeval
add_ts_to_tv(struct timeval tv, struct timespec ts)
{
long ts_usec = ts.tv_nsec / 1000;
tv.tv_sec += ts.tv_sec;
tv.tv_usec += ts_usec;
if (tv.tv_usec >= 1000000) {
tv.tv_sec += tv.tv_usec / 1000000;
tv.tv_usec = tv.tv_usec % 1000000;
}
return tv;
}
static VALUE
tv_to_seconds(struct timeval *timeout) {
if (timeout == NULL) return Qnil;
double seconds = (double)timeout->tv_sec + (double)timeout->tv_usec / 1000000.0;
return DBL2NUM(seconds);
}
static int
is_infinity(struct timeval tv)
{
// { -1, -1 } as infinity
return tv.tv_sec == -1 || tv.tv_usec == -1;
}
static int
is_timeout_tv(struct timeval *timeout_tv, struct timespec now) {
if (!timeout_tv) return false;
if (timeout_tv->tv_sec == -1 && timeout_tv->tv_usec == -1) return false;
struct timespec ts;
ts.tv_sec = timeout_tv->tv_sec;
ts.tv_nsec = timeout_tv->tv_usec * 1000;
if (now.tv_sec > ts.tv_sec) return true;
if (now.tv_sec == ts.tv_sec && now.tv_nsec >= ts.tv_nsec) return true;
return false;
}
static struct timeval *
select_expires_at(
struct hostname_resolution_store *resolution_store,
struct timeval *resolution_delay,
struct timeval *connection_attempt_delay,
struct timeval *user_specified_resolv_timeout_at,
struct timeval *user_specified_connect_timeout_at
) {
if (any_addrinfos(resolution_store)) {
return resolution_delay ? resolution_delay : connection_attempt_delay;
}
struct timeval *timeout = NULL;
if (user_specified_resolv_timeout_at) {
if (is_infinity(*user_specified_resolv_timeout_at)) return NULL;
timeout = user_specified_resolv_timeout_at;
}
if (user_specified_connect_timeout_at) {
if (is_infinity(*user_specified_connect_timeout_at)) return NULL;
if (!timeout || timercmp(user_specified_connect_timeout_at, timeout, >)) {
return user_specified_connect_timeout_at;
}
}
return timeout;
}
static struct timeval
tv_to_timeout(struct timeval *ends_at, struct timespec now)
{
struct timeval delay;
struct timespec expires_at;
expires_at.tv_sec = ends_at->tv_sec;
expires_at.tv_nsec = ends_at->tv_usec * 1000;
struct timespec diff;
diff.tv_sec = expires_at.tv_sec - now.tv_sec;
if (expires_at.tv_nsec >= now.tv_nsec) {
diff.tv_nsec = expires_at.tv_nsec - now.tv_nsec;
} else {
diff.tv_sec -= 1;
diff.tv_nsec = (1000000000 + expires_at.tv_nsec) - now.tv_nsec;
}
delay.tv_sec = diff.tv_sec;
delay.tv_usec = (int)diff.tv_nsec / 1000;
return delay;
}
static struct addrinfo *
pick_addrinfo(struct hostname_resolution_store *resolution_store, int last_family)
{
int priority_on_v6[2] = { AF_INET6, AF_INET };
int priority_on_v4[2] = { AF_INET, AF_INET6 };
int *precedences = last_family == AF_INET6 ? priority_on_v4 : priority_on_v6;
struct addrinfo *selected_ai = NULL;
for (int i = 0; i < 2; i++) {
if (precedences[i] == AF_INET6) {
selected_ai = resolution_store->v6.ai;
if (selected_ai) {
resolution_store->v6.ai = selected_ai->ai_next;
break;
}
} else {
selected_ai = resolution_store->v4.ai;
if (selected_ai) {
resolution_store->v4.ai = selected_ai->ai_next;
break;
}
}
}
return selected_ai;
}
static void
socket_nonblock_set(int fd)
{
int flags = fcntl(fd, F_GETFL);
if (flags < 0) rb_syserr_fail(errno, "fcntl(2)");
if ((flags & O_NONBLOCK) != 0) return;
flags |= O_NONBLOCK;
if (fcntl(fd, F_SETFL, flags) < 0) rb_syserr_fail(errno, "fcntl(2)");
return;
}
static int
in_progress_fds(int fds_size)
{
return fds_size > 0;
}
static void
remove_connection_attempt_fd(int *fds, int *fds_size, int removing_fd) {
int i, j;
for (i = 0; i < *fds_size; i++) {
if (fds[i] != removing_fd) continue;
for (j = i; j < *fds_size - 1; j++) {
fds[j] = fds[j + 1];
}
(*fds_size)--;
fds[*fds_size] = -1;
break;
}
}
struct fast_fallback_error
{
int type;
int ecode;
};
static VALUE
init_fast_fallback_inetsock_internal(VALUE v)
{
struct fast_fallback_inetsock_arg *arg = (void *)v;
VALUE io = arg->io;
VALUE resolv_timeout = arg->resolv_timeout;
VALUE connect_timeout = arg->connect_timeout;
VALUE test_mode_settings = arg->test_mode_settings;
struct addrinfo *remote_ai = NULL, *local_ai = NULL;
int connected_fd = -1, status = 0, local_status = 0;
int remote_addrinfo_hints = 0;
struct fast_fallback_error last_error = { 0, 0 };
const char *syscall = 0;
VALUE host, serv;
#ifdef HAVE_CONST_AI_ADDRCONFIG
remote_addrinfo_hints |= AI_ADDRCONFIG;
#endif
pthread_t threads[arg->family_size];
char resolved_type[2];
ssize_t resolved_type_size;
int hostname_resolution_waiter = -1, hostname_resolution_notifier = -1;
int pipefd[2];
int nfds = 0;
struct timeval *ends_at = NULL;
struct timeval delay = (struct timeval){ -1, -1 };
struct timeval *delay_p = NULL;
struct hostname_resolution_store resolution_store;
resolution_store.is_all_finised = false;
resolution_store.v6.ai = NULL;
resolution_store.v6.finished = false;
resolution_store.v6.has_error = false;
resolution_store.v4.ai = NULL;
resolution_store.v4.finished = false;
resolution_store.v4.has_error = false;
int last_family = 0;
int additional_capacity = 10;
int current_capacity = additional_capacity;
arg->connection_attempt_fds = allocate_connection_attempt_fds(additional_capacity);
arg->connection_attempt_fds_size = 0;
struct timeval resolution_delay_storage;
struct timeval *resolution_delay_expires_at = NULL;
struct timeval connection_attempt_delay_strage;
struct timeval *connection_attempt_delay_expires_at = NULL;
struct timeval user_specified_resolv_timeout_storage;
struct timeval *user_specified_resolv_timeout_at = NULL;
struct timeval user_specified_connect_timeout_storage;
struct timeval *user_specified_connect_timeout_at = NULL;
struct timespec now = current_clocktime_ts();
/* start of hostname resolution */
if (arg->family_size == 1) {
arg->wait = -1;
arg->getaddrinfo_shared = NULL;
int family = arg->families[0];
arg->remote.res = rsock_addrinfo(
arg->remote.host,
arg->remote.serv,
family,
SOCK_STREAM,
0
);
if (family == AF_INET6) {
resolution_store.v6.ai = arg->remote.res->ai;
resolution_store.v6.finished = true;
resolution_store.v4.finished = true;
} else if (family == AF_INET) {
resolution_store.v4.ai = arg->remote.res->ai;
resolution_store.v4.finished = true;
resolution_store.v6.finished = true;
}
resolution_store.is_all_finised = true;
} else {
if (pipe(pipefd) != 0) rb_syserr_fail(errno, "pipe(2)");
hostname_resolution_waiter = pipefd[0];
int waiter_flags = fcntl(hostname_resolution_waiter, F_GETFL, 0);
if (waiter_flags < 0) rb_syserr_fail(errno, "fcntl(2)");
if ((fcntl(hostname_resolution_waiter, F_SETFL, waiter_flags | O_NONBLOCK)) < 0) {
rb_syserr_fail(errno, "fcntl(2)");
}
arg->wait = hostname_resolution_waiter;
hostname_resolution_notifier = pipefd[1];
arg->getaddrinfo_shared = allocate_fast_fallback_getaddrinfo_shared(arg->family_size);
if (!arg->getaddrinfo_shared) rb_syserr_fail(errno, "calloc(3)");
rb_nativethread_lock_initialize(&arg->getaddrinfo_shared->lock);
arg->getaddrinfo_shared->notify = hostname_resolution_notifier;
arg->getaddrinfo_shared->node = arg->hostp ? ruby_strdup(arg->hostp) : NULL;
arg->getaddrinfo_shared->service = ruby_strdup(arg->portp);
arg->getaddrinfo_shared->refcount = arg->family_size + 1;
for (int i = 0; i < arg->family_size; i++) {
arg->getaddrinfo_entries[i] = &arg->getaddrinfo_shared->getaddrinfo_entries[i];
arg->getaddrinfo_entries[i]->shared = arg->getaddrinfo_shared;
struct addrinfo getaddrinfo_hints[arg->family_size];
allocate_fast_fallback_getaddrinfo_hints(
&getaddrinfo_hints[i],
arg->families[i],
remote_addrinfo_hints,
arg->additional_flags
);
arg->getaddrinfo_entries[i]->hints = getaddrinfo_hints[i];
arg->getaddrinfo_entries[i]->ai = NULL;
arg->getaddrinfo_entries[i]->family = arg->families[i];
arg->getaddrinfo_entries[i]->refcount = 2;
arg->getaddrinfo_entries[i]->has_syserr = false;
arg->getaddrinfo_entries[i]->test_sleep_ms = 0;
arg->getaddrinfo_entries[i]->test_ecode = 0;
/* for testing HEv2 */
if (!NIL_P(test_mode_settings) && RB_TYPE_P(test_mode_settings, T_HASH)) {
const char *family_sym = arg->families[i] == AF_INET6 ? "ipv6" : "ipv4";
VALUE test_delay_setting = rb_hash_aref(test_mode_settings, ID2SYM(rb_intern("delay")));
if (!NIL_P(test_delay_setting)) {
VALUE rb_test_delay_ms = rb_hash_aref(test_delay_setting, ID2SYM(rb_intern(family_sym)));
long test_delay_ms = NIL_P(rb_test_delay_ms) ? 0 : rb_test_delay_ms;
arg->getaddrinfo_entries[i]->test_sleep_ms = test_delay_ms;
}
VALUE test_error_setting = rb_hash_aref(test_mode_settings, ID2SYM(rb_intern("error")));
if (!NIL_P(test_error_setting)) {
VALUE rb_test_ecode = rb_hash_aref(test_error_setting, ID2SYM(rb_intern(family_sym)));
if (!NIL_P(rb_test_ecode)) {
arg->getaddrinfo_entries[i]->test_ecode = NUM2INT(rb_test_ecode);
}
}
}
if (raddrinfo_pthread_create(&threads[i], fork_safe_do_fast_fallback_getaddrinfo, arg->getaddrinfo_entries[i]) != 0) {
rsock_raise_resolution_error("getaddrinfo(3)", EAI_AGAIN);
}
pthread_detach(threads[i]);
}
if (NIL_P(resolv_timeout)) {
user_specified_resolv_timeout_storage = (struct timeval){ -1, -1 };
} else {
struct timeval resolv_timeout_tv = rb_time_interval(resolv_timeout);
user_specified_resolv_timeout_storage = add_ts_to_tv(resolv_timeout_tv, now);
}
user_specified_resolv_timeout_at = &user_specified_resolv_timeout_storage;
}
while (true) {
/* start of connection */
if (any_addrinfos(&resolution_store) &&
!resolution_delay_expires_at &&
!connection_attempt_delay_expires_at) {
while ((remote_ai = pick_addrinfo(&resolution_store, last_family))) {
int fd = -1;
#if !defined(INET6) && defined(AF_INET6)
if (remote_ai->ai_family == AF_INET6) {
if (any_addrinfos(&resolution_store)) continue;
if (!in_progress_fds(arg->connection_attempt_fds_size)) break;
if (resolution_store.is_all_finised) break;
if (local_status < 0) {
host = arg->local.host;
serv = arg->local.serv;
} else {
host = arg->remote.host;
serv = arg->remote.serv;
}
if (last_error.type == RESOLUTION_ERROR) {
rsock_raise_resolution_error(syscall, last_error.ecode);
} else {
rsock_syserr_fail_host_port(last_error.ecode, syscall, host, serv);
}
}
#endif
local_ai = NULL;
if (arg->local.res) {
for (local_ai = arg->local.res->ai; local_ai; local_ai = local_ai->ai_next) {
if (local_ai->ai_family == remote_ai->ai_family) break;
}
if (!local_ai) {
if (any_addrinfos(&resolution_store)) continue;
if (in_progress_fds(arg->connection_attempt_fds_size)) break;
if (!resolution_store.is_all_finised) break;
/* Use a different family local address if no choice, this
* will cause EAFNOSUPPORT. */
rsock_syserr_fail_host_port(EAFNOSUPPORT, syscall, arg->local.host, arg->local.serv);
}
}
status = rsock_socket(remote_ai->ai_family, remote_ai->ai_socktype, remote_ai->ai_protocol);
syscall = "socket(2)";
if (status < 0) {
last_error.type = SYSCALL_ERROR;
last_error.ecode = errno;
if (any_addrinfos(&resolution_store)) continue;
if (in_progress_fds(arg->connection_attempt_fds_size)) break;
if (!resolution_store.is_all_finised) break;
if (local_status < 0) {
host = arg->local.host;
serv = arg->local.serv;
} else {
host = arg->remote.host;
serv = arg->remote.serv;
}
if (last_error.type == RESOLUTION_ERROR) {
rsock_raise_resolution_error(syscall, last_error.ecode);
} else {
rsock_syserr_fail_host_port(last_error.ecode, syscall, host, serv);
}
}
fd = status;
if (local_ai) {
#if !defined(_WIN32) && !defined(__CYGWIN__)
status = 1;
if ((setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&status, (socklen_t)sizeof(status))) < 0) {
rb_syserr_fail(errno, "setsockopt(2)");
}
#endif
status = bind(fd, local_ai->ai_addr, local_ai->ai_addrlen);
local_status = status;
syscall = "bind(2)";
if (status < 0) {
last_error.type = SYSCALL_ERROR;
last_error.ecode = errno;
close(fd);
if (any_addrinfos(&resolution_store)) continue;
if (in_progress_fds(arg->connection_attempt_fds_size)) break;
if (!resolution_store.is_all_finised) break;
if (local_status < 0) {
host = arg->local.host;
serv = arg->local.serv;
} else {
host = arg->remote.host;
serv = arg->remote.serv;
}
if (last_error.type == RESOLUTION_ERROR) {
rsock_raise_resolution_error(syscall, last_error.ecode);
} else {
rsock_syserr_fail_host_port(last_error.ecode, syscall, host, serv);
}
}
}
syscall = "connect(2)";
if (any_addrinfos(&resolution_store) ||
in_progress_fds(arg->connection_attempt_fds_size) ||
!resolution_store.is_all_finised) {
socket_nonblock_set(fd);
status = connect(fd, remote_ai->ai_addr, remote_ai->ai_addrlen);
last_family = remote_ai->ai_family;
} else {
if (!NIL_P(connect_timeout)) {
user_specified_connect_timeout_storage = rb_time_interval(connect_timeout);
user_specified_connect_timeout_at = &user_specified_connect_timeout_storage;
}
VALUE timeout =
(user_specified_connect_timeout_at && is_infinity(*user_specified_connect_timeout_at)) ?
Qnil : tv_to_seconds(user_specified_connect_timeout_at);
io = arg->io = rsock_init_sock(arg->self, fd);
status = rsock_connect(io, remote_ai->ai_addr, remote_ai->ai_addrlen, 0, timeout);
}
if (status == 0) {
connected_fd = fd;
break;
}
if (errno == EINPROGRESS) {
if (current_capacity == arg->connection_attempt_fds_size) {
current_capacity = reallocate_connection_attempt_fds(
&arg->connection_attempt_fds,
current_capacity,
additional_capacity
);
}
arg->connection_attempt_fds[arg->connection_attempt_fds_size] = fd;
(arg->connection_attempt_fds_size)++;
set_timeout_tv(&connection_attempt_delay_strage, 250, now);
connection_attempt_delay_expires_at = &connection_attempt_delay_strage;
if (!any_addrinfos(&resolution_store)) {
if (NIL_P(connect_timeout)) {
user_specified_connect_timeout_storage = (struct timeval){ -1, -1 };
} else {
struct timeval connect_timeout_tv = rb_time_interval(connect_timeout);
user_specified_connect_timeout_storage = add_ts_to_tv(connect_timeout_tv, now);
}
user_specified_connect_timeout_at = &user_specified_connect_timeout_storage;
}
break;
}
last_error.type = SYSCALL_ERROR;
last_error.ecode = errno;
if (NIL_P(io)) {
close(fd);
} else {
rb_io_close(io);
}
if (any_addrinfos(&resolution_store)) continue;
if (in_progress_fds(arg->connection_attempt_fds_size)) break;
if (!resolution_store.is_all_finised) break;
if (local_status < 0) {
host = arg->local.host;
serv = arg->local.serv;
} else {
host = arg->remote.host;
serv = arg->remote.serv;
}
if (last_error.type == RESOLUTION_ERROR) {
rsock_raise_resolution_error(syscall, last_error.ecode);
} else {
rsock_syserr_fail_host_port(last_error.ecode, syscall, host, serv);
}
}
}
if (connected_fd >= 0) break;
ends_at = select_expires_at(
&resolution_store,
resolution_delay_expires_at,
connection_attempt_delay_expires_at,
user_specified_resolv_timeout_at,
user_specified_connect_timeout_at
);
if (ends_at) {
delay = tv_to_timeout(ends_at, now);
delay_p = &delay;
} else {
if (((resolution_store.v6.finished && !resolution_store.v4.finished) ||
(resolution_store.v4.finished && !resolution_store.v6.finished)) &&
!any_addrinfos(&resolution_store) &&
!in_progress_fds(arg->connection_attempt_fds_size)) {
/* A limited timeout is introduced to prevent select(2) from hanging when it is exclusively
* waiting for name resolution and write(2) failure occurs in a child thread. */
delay.tv_sec = 0;
delay.tv_usec = 50000;
delay_p = &delay;
} else {
delay_p = NULL;
}
}
nfds = 0;
rb_fd_zero(&arg->writefds);
if (in_progress_fds(arg->connection_attempt_fds_size)) {
int n = 0;
for (int i = 0; i < arg->connection_attempt_fds_size; i++) {
int cfd = arg->connection_attempt_fds[i];
if (cfd < 0) continue;
if (cfd > n) n = cfd;
rb_fd_set(cfd, &arg->writefds);
}
if (n > 0) n++;
nfds = n;
}
rb_fd_zero(&arg->readfds);
if (arg->family_size > 1) {
rb_fd_set(hostname_resolution_waiter, &arg->readfds);
if ((hostname_resolution_waiter + 1) > nfds) {
nfds = hostname_resolution_waiter + 1;
}
}
status = rb_thread_fd_select(nfds, &arg->readfds, &arg->writefds, NULL, delay_p);
now = current_clocktime_ts();
if (is_timeout_tv(resolution_delay_expires_at, now)) {
resolution_delay_expires_at = NULL;
}
if (is_timeout_tv(connection_attempt_delay_expires_at, now)) {
connection_attempt_delay_expires_at = NULL;
}
if (status < 0 && (errno && errno != EINTR)) rb_syserr_fail(errno, "select(2)");
if (status > 0) {
/* check for connection */
if (in_progress_fds(arg->connection_attempt_fds_size)) {
for (int i = 0; i < arg->connection_attempt_fds_size; i++) {
int fd = arg->connection_attempt_fds[i];
if (fd < 0 || !rb_fd_isset(fd, &arg->writefds)) continue;
int err;
socklen_t len = sizeof(err);
status = getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &len);
if (status < 0) {
last_error.type = SYSCALL_ERROR;
last_error.ecode = errno;
close(fd);
if (any_addrinfos(&resolution_store)) continue;
if (in_progress_fds(arg->connection_attempt_fds_size)) break;
if (!resolution_store.is_all_finised) break;
if (local_status < 0) {
host = arg->local.host;
serv = arg->local.serv;
} else {
host = arg->remote.host;
serv = arg->remote.serv;
}
if (last_error.type == RESOLUTION_ERROR) {
rsock_raise_resolution_error(syscall, last_error.ecode);
} else {
rsock_syserr_fail_host_port(last_error.ecode, syscall, host, serv);
}
}
if (err == 0) { /* success */
remove_connection_attempt_fd(
arg->connection_attempt_fds,
&arg->connection_attempt_fds_size,
fd
);
connected_fd = fd;
break;
} else { /* fail */
close(fd);
remove_connection_attempt_fd(
arg->connection_attempt_fds,
&arg->connection_attempt_fds_size,
fd
);
last_error.type = SYSCALL_ERROR;
last_error.ecode = err;
}
}
if (connected_fd >= 0) break;
if (!in_progress_fds(arg->connection_attempt_fds_size)) {
if (!any_addrinfos(&resolution_store) && resolution_store.is_all_finised) {
if (local_status < 0) {
host = arg->local.host;
serv = arg->local.serv;
} else {
host = arg->remote.host;
serv = arg->remote.serv;
}
if (last_error.type == RESOLUTION_ERROR) {
rsock_raise_resolution_error(syscall, last_error.ecode);
} else {
rsock_syserr_fail_host_port(last_error.ecode, syscall, host, serv);
}
}
connection_attempt_delay_expires_at = NULL;
user_specified_connect_timeout_at = NULL;
}
}
/* check for hostname resolution */
if (!resolution_store.is_all_finised && rb_fd_isset(hostname_resolution_waiter, &arg->readfds)) {
while (true) {
resolved_type_size = read(
hostname_resolution_waiter,
resolved_type,
sizeof(resolved_type) - 1
);
if (resolved_type_size > 0) {
resolved_type[resolved_type_size] = '\0';
if (resolved_type[0] == IPV6_HOSTNAME_RESOLVED) {
resolution_store.v6.finished = true;
if (arg->getaddrinfo_entries[IPV6_ENTRY_POS]->err &&
arg->getaddrinfo_entries[IPV6_ENTRY_POS]->err != EAI_ADDRFAMILY) {
if (!resolution_store.v4.finished || resolution_store.v4.has_error) {
last_error.type = RESOLUTION_ERROR;
last_error.ecode = arg->getaddrinfo_entries[IPV6_ENTRY_POS]->err;
syscall = "getaddrinfo(3)";
}
resolution_store.v6.has_error = true;
} else {
resolution_store.v6.ai = arg->getaddrinfo_entries[IPV6_ENTRY_POS]->ai;
}
if (resolution_store.v4.finished) {
resolution_store.is_all_finised = true;
resolution_delay_expires_at = NULL;
user_specified_resolv_timeout_at = NULL;
break;
}
} else if (resolved_type[0] == IPV4_HOSTNAME_RESOLVED) {
resolution_store.v4.finished = true;
if (arg->getaddrinfo_entries[IPV4_ENTRY_POS]->err) {
if (!resolution_store.v6.finished || resolution_store.v6.has_error) {
last_error.type = RESOLUTION_ERROR;
last_error.ecode = arg->getaddrinfo_entries[IPV4_ENTRY_POS]->err;
syscall = "getaddrinfo(3)";
}
resolution_store.v4.has_error = true;
} else {
resolution_store.v4.ai = arg->getaddrinfo_entries[IPV4_ENTRY_POS]->ai;
}
if (resolution_store.v6.finished) {
resolution_store.is_all_finised = true;
resolution_delay_expires_at = NULL;
user_specified_resolv_timeout_at = NULL;
break;
}
} else {
/* Retry to read from hostname_resolution_waiter */
}
} else if (resolved_type_size < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)) {
errno = 0;
break;
} else {
/* Retry to read from hostname_resolution_waiter */
}
if (!resolution_store.v6.finished &&
resolution_store.v4.finished &&
!resolution_store.v4.has_error) {
set_timeout_tv(&resolution_delay_storage, 50, now);
resolution_delay_expires_at = &resolution_delay_storage;
}
}
}
status = 0;
}
/* For cases where write(2) fails in child threads */
if (!resolution_store.is_all_finised) {
if (!resolution_store.v6.finished && arg->getaddrinfo_entries[IPV6_ENTRY_POS]->has_syserr) {
resolution_store.v6.finished = true;
if (arg->getaddrinfo_entries[IPV6_ENTRY_POS]->err) {
if (!resolution_store.v4.finished || resolution_store.v4.has_error) {
last_error.type = RESOLUTION_ERROR;
last_error.ecode = arg->getaddrinfo_entries[IPV6_ENTRY_POS]->err;
syscall = "getaddrinfo(3)";
}
resolution_store.v6.has_error = true;
} else {
resolution_store.v6.ai = arg->getaddrinfo_entries[IPV6_ENTRY_POS]->ai;
}
if (resolution_store.v4.finished) {
resolution_store.is_all_finised = true;
resolution_delay_expires_at = NULL;
user_specified_resolv_timeout_at = NULL;
}
}
if (!resolution_store.v4.finished && arg->getaddrinfo_entries[IPV4_ENTRY_POS]->has_syserr) {
resolution_store.v4.finished = true;
if (arg->getaddrinfo_entries[IPV4_ENTRY_POS]->err) {
if (!resolution_store.v6.finished || resolution_store.v6.has_error) {
last_error.type = RESOLUTION_ERROR;
last_error.ecode = arg->getaddrinfo_entries[IPV4_ENTRY_POS]->err;
syscall = "getaddrinfo(3)";
}
resolution_store.v4.has_error = true;
} else {
resolution_store.v4.ai = arg->getaddrinfo_entries[IPV4_ENTRY_POS]->ai;
}
if (resolution_store.v6.finished) {
resolution_store.is_all_finised = true;
resolution_delay_expires_at = NULL;
user_specified_resolv_timeout_at = NULL;
} else {
set_timeout_tv(&resolution_delay_storage, 50, now);
resolution_delay_expires_at = &resolution_delay_storage;
}
}
}
if (!any_addrinfos(&resolution_store)) {
if (!in_progress_fds(arg->connection_attempt_fds_size) &&
resolution_store.is_all_finised) {
if (local_status < 0) {
host = arg->local.host;
serv = arg->local.serv;
} else {
host = arg->remote.host;
serv = arg->remote.serv;
}
if (last_error.type == RESOLUTION_ERROR) {
rsock_raise_resolution_error(syscall, last_error.ecode);
} else {
rsock_syserr_fail_host_port(last_error.ecode, syscall, host, serv);
}
}
if ((is_timeout_tv(user_specified_resolv_timeout_at, now) ||
resolution_store.is_all_finised) &&
(is_timeout_tv(user_specified_connect_timeout_at, now) ||
!in_progress_fds(arg->connection_attempt_fds_size))) {
VALUE errno_module = rb_const_get(rb_cObject, rb_intern("Errno"));
VALUE etimedout_error = rb_const_get(errno_module, rb_intern("ETIMEDOUT"));
rb_raise(etimedout_error, "user specified timeout");
}
}
}
if (NIL_P(arg->io)) {
/* create new instance */
arg->io = rsock_init_sock(arg->self, connected_fd);
}
return arg->io;
}
static VALUE
fast_fallback_inetsock_cleanup(VALUE v)
{
struct fast_fallback_inetsock_arg *arg = (void *)v;
struct fast_fallback_getaddrinfo_shared *getaddrinfo_shared = arg->getaddrinfo_shared;
if (arg->remote.res) {
rb_freeaddrinfo(arg->remote.res);
arg->remote.res = 0;
}
if (arg->local.res) {
rb_freeaddrinfo(arg->local.res);
arg->local.res = 0;
}
if (arg->wait != -1) close(arg->wait);
if (getaddrinfo_shared) {
if (getaddrinfo_shared->notify != -1) close(getaddrinfo_shared->notify);
getaddrinfo_shared->notify = -1;
int shared_need_free = 0;
int need_free[2] = { 0, 0 };
rb_nativethread_lock_lock(&getaddrinfo_shared->lock);
{
for (int i = 0; i < arg->family_size; i++) {
if (arg->getaddrinfo_entries[i] && --(arg->getaddrinfo_entries[i]->refcount) == 0) {
need_free[i] = 1;
}
}
if (--(getaddrinfo_shared->refcount) == 0) {
shared_need_free = 1;
}
}
rb_nativethread_lock_unlock(&getaddrinfo_shared->lock);
for (int i = 0; i < arg->family_size; i++) {
if (need_free[i]) free_fast_fallback_getaddrinfo_entry(&arg->getaddrinfo_entries[i]);
}
if (shared_need_free) free_fast_fallback_getaddrinfo_shared(&getaddrinfo_shared);
}
int connection_attempt_fd;
for (int i = 0; i < arg->connection_attempt_fds_size; i++) {
connection_attempt_fd = arg->connection_attempt_fds[i];
if (connection_attempt_fd >= 0) {
int error = 0;
socklen_t len = sizeof(error);
getsockopt(connection_attempt_fd, SOL_SOCKET, SO_ERROR, &error, &len);
if (error == 0) shutdown(connection_attempt_fd, SHUT_RDWR);
close(connection_attempt_fd);
}
}
if (arg->readfds.fdset) rb_fd_term(&arg->readfds);
if (arg->writefds.fdset) rb_fd_term(&arg->writefds);
if (arg->connection_attempt_fds) {
free(arg->connection_attempt_fds);
arg->connection_attempt_fds = NULL;
}
return Qnil;
}
VALUE
rsock_init_inetsock(VALUE self, VALUE remote_host, VALUE remote_serv, VALUE local_host, VALUE local_serv, int type, VALUE resolv_timeout, VALUE connect_timeout, VALUE fast_fallback, VALUE test_mode_settings)
{
if (type == INET_CLIENT && FAST_FALLBACK_INIT_INETSOCK_IMPL == 1 && RTEST(fast_fallback)) {
struct rb_addrinfo *local_res = NULL;
char *hostp, *portp;
char hbuf[NI_MAXHOST], pbuf[NI_MAXSERV];
int additional_flags = 0;
hostp = host_str(remote_host, hbuf, sizeof(hbuf), &additional_flags);
portp = port_str(remote_serv, pbuf, sizeof(pbuf), &additional_flags);
if (!is_specified_ip_address(hostp)) {
int target_families[2] = { 0, 0 };
int resolving_family_size = 0;
/*
* Maybe also accept a local address
*/
if (!NIL_P(local_host) || !NIL_P(local_serv)) {
local_res = rsock_addrinfo(
local_host,
local_serv,
AF_UNSPEC,
SOCK_STREAM,
0
);
struct addrinfo *tmp_p = local_res->ai;
for (tmp_p; tmp_p != NULL; tmp_p = tmp_p->ai_next) {
if (target_families[0] == 0 && tmp_p->ai_family == AF_INET6) {
target_families[0] = AF_INET6;
resolving_family_size++;
}
if (target_families[1] == 0 && tmp_p->ai_family == AF_INET) {
target_families[1] = AF_INET;
resolving_family_size++;
}
}
} else {
resolving_family_size = 2;
target_families[0] = AF_INET6;
target_families[1] = AF_INET;
}
struct fast_fallback_inetsock_arg fast_fallback_arg;
memset(&fast_fallback_arg, 0, sizeof(fast_fallback_arg));
fast_fallback_arg.self = self;
fast_fallback_arg.io = Qnil;
fast_fallback_arg.remote.host = remote_host;
fast_fallback_arg.remote.serv = remote_serv;
fast_fallback_arg.remote.res = 0;
fast_fallback_arg.local.host = local_host;
fast_fallback_arg.local.serv = local_serv;
fast_fallback_arg.local.res = local_res;
fast_fallback_arg.type = type;
fast_fallback_arg.resolv_timeout = resolv_timeout;
fast_fallback_arg.connect_timeout = connect_timeout;
fast_fallback_arg.hostp = hostp;
fast_fallback_arg.portp = portp;
fast_fallback_arg.additional_flags = additional_flags;
int resolving_families[resolving_family_size];
int resolving_family_index = 0;
for (int i = 0; 2 > i; i++) {
if (target_families[i] != 0) {
resolving_families[resolving_family_index] = target_families[i];
resolving_family_index++;
}
}
fast_fallback_arg.families = resolving_families;
fast_fallback_arg.family_size = resolving_family_size;
fast_fallback_arg.test_mode_settings = test_mode_settings;
rb_fd_init(&fast_fallback_arg.readfds);
rb_fd_init(&fast_fallback_arg.writefds);
return rb_ensure(init_fast_fallback_inetsock_internal, (VALUE)&fast_fallback_arg,
fast_fallback_inetsock_cleanup, (VALUE)&fast_fallback_arg);
}
}
struct inetsock_arg arg;
arg.self = self;
arg.io = Qnil;
arg.remote.host = remote_host;
arg.remote.serv = remote_serv;
arg.remote.res = 0;
arg.local.host = local_host;
arg.local.serv = local_serv;
arg.local.res = 0;
arg.type = type;
arg.resolv_timeout = resolv_timeout;
arg.connect_timeout = connect_timeout;
return rb_ensure(init_inetsock_internal, (VALUE)&arg,
inetsock_cleanup, (VALUE)&arg);
}
#endif
static ID id_numeric, id_hostname;
int
rsock_revlookup_flag(VALUE revlookup, int *norevlookup)
{
#define return_norevlookup(x) {*norevlookup = (x); return 1;}
ID id;
switch (revlookup) {
case Qtrue: return_norevlookup(0);
case Qfalse: return_norevlookup(1);
case Qnil: break;
default:
Check_Type(revlookup, T_SYMBOL);
id = SYM2ID(revlookup);
if (id == id_numeric) return_norevlookup(1);
if (id == id_hostname) return_norevlookup(0);
rb_raise(rb_eArgError, "invalid reverse_lookup flag: :%s", rb_id2name(id));
}
return 0;
#undef return_norevlookup
}
/*
* call-seq:
* ipsocket.inspect -> string
*
* Return a string describing this IPSocket object.
*/
static VALUE
ip_inspect(VALUE sock)
{
VALUE str = rb_call_super(0, 0);
rb_io_t *fptr = RFILE(sock)->fptr;
union_sockaddr addr;
socklen_t len = (socklen_t)sizeof addr;
ID id;
if (fptr && fptr->fd >= 0 &&
getsockname(fptr->fd, &addr.addr, &len) >= 0 &&
(id = rsock_intern_family(addr.addr.sa_family)) != 0) {
VALUE family = rb_id2str(id);
char hbuf[1024], pbuf[1024];
long slen = RSTRING_LEN(str);
const char last = (slen > 1 && RSTRING_PTR(str)[slen - 1] == '>') ?
(--slen, '>') : 0;
str = rb_str_subseq(str, 0, slen);
rb_str_cat_cstr(str, ", ");
rb_str_append(str, family);
if (!rb_getnameinfo(&addr.addr, len, hbuf, sizeof(hbuf),
pbuf, sizeof(pbuf), NI_NUMERICHOST | NI_NUMERICSERV)) {
rb_str_cat_cstr(str, ", ");
rb_str_cat_cstr(str, hbuf);
rb_str_cat_cstr(str, ", ");
rb_str_cat_cstr(str, pbuf);
}
if (last) rb_str_cat(str, &last, 1);
}
return str;
}
/*
* call-seq:
* ipsocket.addr([reverse_lookup]) => [address_family, port, hostname, numeric_address]
*
* Returns the local address as an array which contains
* address_family, port, hostname and numeric_address.
*
* If +reverse_lookup+ is +true+ or +:hostname+,
* hostname is obtained from numeric_address using reverse lookup.
* Or if it is +false+, or +:numeric+,
* hostname is the same as numeric_address.
* Or if it is +nil+ or omitted, obeys to +ipsocket.do_not_reverse_lookup+.
* See +Socket.getaddrinfo+ also.
*
* TCPSocket.open("www.ruby-lang.org", 80) {|sock|
* p sock.addr #=> ["AF_INET", 49429, "hal", "192.168.0.128"]
* p sock.addr(true) #=> ["AF_INET", 49429, "hal", "192.168.0.128"]
* p sock.addr(false) #=> ["AF_INET", 49429, "192.168.0.128", "192.168.0.128"]
* p sock.addr(:hostname) #=> ["AF_INET", 49429, "hal", "192.168.0.128"]
* p sock.addr(:numeric) #=> ["AF_INET", 49429, "192.168.0.128", "192.168.0.128"]
* }
*
*/
static VALUE
ip_addr(int argc, VALUE *argv, VALUE sock)
{
union_sockaddr addr;
socklen_t len = (socklen_t)sizeof addr;
int norevlookup;
if (argc < 1 || !rsock_revlookup_flag(argv[0], &norevlookup))
norevlookup = rb_io_mode(sock) & FMODE_NOREVLOOKUP;
if (getsockname(rb_io_descriptor(sock), &addr.addr, &len) < 0)
rb_sys_fail("getsockname(2)");
return rsock_ipaddr(&addr.addr, len, norevlookup);
}
/*
* call-seq:
* ipsocket.peeraddr([reverse_lookup]) => [address_family, port, hostname, numeric_address]
*
* Returns the remote address as an array which contains
* address_family, port, hostname and numeric_address.
* It is defined for connection oriented socket such as TCPSocket.
*
* If +reverse_lookup+ is +true+ or +:hostname+,
* hostname is obtained from numeric_address using reverse lookup.
* Or if it is +false+, or +:numeric+,
* hostname is the same as numeric_address.
* Or if it is +nil+ or omitted, obeys to +ipsocket.do_not_reverse_lookup+.
* See +Socket.getaddrinfo+ also.
*
* TCPSocket.open("www.ruby-lang.org", 80) {|sock|
* p sock.peeraddr #=> ["AF_INET", 80, "carbon.ruby-lang.org", "221.186.184.68"]
* p sock.peeraddr(true) #=> ["AF_INET", 80, "carbon.ruby-lang.org", "221.186.184.68"]
* p sock.peeraddr(false) #=> ["AF_INET", 80, "221.186.184.68", "221.186.184.68"]
* p sock.peeraddr(:hostname) #=> ["AF_INET", 80, "carbon.ruby-lang.org", "221.186.184.68"]
* p sock.peeraddr(:numeric) #=> ["AF_INET", 80, "221.186.184.68", "221.186.184.68"]
* }
*
*/
static VALUE
ip_peeraddr(int argc, VALUE *argv, VALUE sock)
{
union_sockaddr addr;
socklen_t len = (socklen_t)sizeof addr;
int norevlookup;
if (argc < 1 || !rsock_revlookup_flag(argv[0], &norevlookup))
norevlookup = rb_io_mode(sock) & FMODE_NOREVLOOKUP;
if (getpeername(rb_io_descriptor(sock), &addr.addr, &len) < 0)
rb_sys_fail("getpeername(2)");
return rsock_ipaddr(&addr.addr, len, norevlookup);
}
/*
* call-seq:
* ipsocket.recvfrom(maxlen) => [mesg, ipaddr]
* ipsocket.recvfrom(maxlen, flags) => [mesg, ipaddr]
*
* Receives a message and return the message as a string and
* an address which the message come from.
*
* _maxlen_ is the maximum number of bytes to receive.
*
* _flags_ should be a bitwise OR of Socket::MSG_* constants.
*
* ipaddr is the same as IPSocket#{peeraddr,addr}.
*
* u1 = UDPSocket.new
* u1.bind("127.0.0.1", 4913)
* u2 = UDPSocket.new
* u2.send "uuuu", 0, "127.0.0.1", 4913
* p u1.recvfrom(10) #=> ["uuuu", ["AF_INET", 33230, "localhost", "127.0.0.1"]]
*
*/
static VALUE
ip_recvfrom(int argc, VALUE *argv, VALUE sock)
{
return rsock_s_recvfrom(sock, argc, argv, RECV_IP);
}
/*
* call-seq:
* IPSocket.getaddress(host) => ipaddress
*
* Lookups the IP address of _host_.
*
* require 'socket'
*
* IPSocket.getaddress("localhost") #=> "127.0.0.1"
* IPSocket.getaddress("ip6-localhost") #=> "::1"
*
*/
static VALUE
ip_s_getaddress(VALUE obj, VALUE host)
{
union_sockaddr addr;
struct rb_addrinfo *res = rsock_addrinfo(host, Qnil, AF_UNSPEC, SOCK_STREAM, 0);
socklen_t len = res->ai->ai_addrlen;
/* just take the first one */
memcpy(&addr, res->ai->ai_addr, len);
rb_freeaddrinfo(res);
return rsock_make_ipaddr(&addr.addr, len);
}
void
rsock_init_ipsocket(void)
{
/*
* Document-class: IPSocket < BasicSocket
*
* IPSocket is the super class of TCPSocket and UDPSocket.
*/
rb_cIPSocket = rb_define_class("IPSocket", rb_cBasicSocket);
rb_define_method(rb_cIPSocket, "inspect", ip_inspect, 0);
rb_define_method(rb_cIPSocket, "addr", ip_addr, -1);
rb_define_method(rb_cIPSocket, "peeraddr", ip_peeraddr, -1);
rb_define_method(rb_cIPSocket, "recvfrom", ip_recvfrom, -1);
rb_define_singleton_method(rb_cIPSocket, "getaddress", ip_s_getaddress, 1);
rb_undef_method(rb_cIPSocket, "getpeereid");
id_numeric = rb_intern_const("numeric");
id_hostname = rb_intern_const("hostname");
}
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