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socket.c
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socket.c
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/*
* Copyright 2010-2015, Tarantool AUTHORS, please see AUTHORS file.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* <COPYRIGHT HOLDER> OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "lua/socket.h"
#include <errno.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/types.h>
#include <string.h>
#include <netdb.h>
#include <string.h>
#include <stdlib.h>
#include <arpa/inet.h>
#include <netinet/ip.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <unistd.h>
#include <lua.h>
#include <lauxlib.h>
#include <lualib.h>
#include <coio.h> /* coio_wait() */
#include <coio_task.h> /* coio_getaddrinfo() */
#include <fiber.h>
#include "lua/utils.h"
#include "lua/fiber.h"
extern int coio_wait(int fd, int event, double timeout);
extern char socket_lua[];
static const struct { char name[32]; int value; } domains[] = {
#ifdef PF_UNIX
{ "PF_UNIX", PF_UNIX },
#endif
#ifdef PF_LOCAL
{ "PF_LOCAL", PF_LOCAL },
#endif
#ifdef PF_INET
{ "PF_INET", PF_INET },
#endif
#ifdef PF_INET6
{ "PF_INET6", PF_INET6 },
#endif
#ifdef PF_IPX
{ "PF_IPX", PF_IPX },
#endif
#ifdef PF_NETLINK
{ "PF_NETLINK", PF_NETLINK },
#endif
#ifdef PF_X25
{ "PF_X25", PF_X25 },
#endif
#ifdef PF_AX25
{ "PF_AX25", PF_AX25 },
#endif
#ifdef PF_ATMPVC
{ "PF_ATMPVC", PF_ATMPVC },
#endif
#ifdef PF_APPLETALK
{ "PF_APPLETALK", PF_APPLETALK },
#endif
#ifdef PF_PACKET
{ "PF_PACKET", PF_PACKET },
#endif
{ "", 0 }
};
static const struct { char name[32]; int value; } types[] = {
#ifdef SOCK_STREAM
{ "SOCK_STREAM", SOCK_STREAM },
#endif
#ifdef SOCK_DGRAM
{ "SOCK_DGRAM", SOCK_DGRAM },
#endif
#ifdef SOCK_SEQPACKET
{ "SOCK_SEQPACKET", SOCK_SEQPACKET },
#endif
#ifdef SOCK_RAW
{ "SOCK_RAW", SOCK_RAW },
#endif
#ifdef SOCK_RDM
{ "SOCK_RDM", SOCK_RDM },
#endif
{ "", 0 }
};
static const struct { char name[32]; int value; } send_flags[] = {
#ifdef MSG_OOB
{"MSG_OOB", MSG_OOB },
#endif
#ifdef MSG_PEEK
{"MSG_PEEK", MSG_PEEK },
#endif
#ifdef MSG_DONTROUTE
{"MSG_DONTROUTE", MSG_DONTROUTE },
#endif
#ifdef MSG_TRYHARD
{"MSG_TRYHARD", MSG_TRYHARD },
#endif
#ifdef MSG_CTRUNC
{"MSG_CTRUNC", MSG_CTRUNC },
#endif
#ifdef MSG_PROXY
{"MSG_PROXY", MSG_PROXY },
#endif
#ifdef MSG_TRUNC
{"MSG_TRUNC", MSG_TRUNC },
#endif
#ifdef MSG_DONTWAIT
{"MSG_DONTWAIT", MSG_DONTWAIT },
#endif
#ifdef MSG_EOR
{"MSG_EOR", MSG_EOR },
#endif
#ifdef MSG_WAITALL
{"MSG_WAITALL", MSG_WAITALL },
#endif
#ifdef MSG_FIN
{"MSG_FIN", MSG_FIN },
#endif
#ifdef MSG_SYN
{"MSG_SYN", MSG_SYN },
#endif
#ifdef MSG_CONFIRM
{"MSG_CONFIRM", MSG_CONFIRM },
#endif
#ifdef MSG_RST
{"MSG_RST", MSG_RST },
#endif
#ifdef MSG_ERRQUEUE
{"MSG_ERRQUEUE", MSG_ERRQUEUE },
#endif
#ifdef MSG_NOSIGNAL
{"MSG_NOSIGNAL", MSG_NOSIGNAL },
#endif
#ifdef MSG_MORE
{"MSG_MORE", MSG_MORE },
#endif
#ifdef MSG_WAITFORONE
{"MSG_WAITFORONE", MSG_WAITFORONE },
#endif
#ifdef MSG_FASTOPEN
{"MSG_FASTOPEN", MSG_FASTOPEN },
#endif
#ifdef MSG_CMSG_CLOEXEC
{"MSG_CMSG_CLOEXEC", MSG_CMSG_CLOEXEC},
#endif
{ "", 0 }
};
/** SOL_SOCKET/IPPROTO_IP/IPPROTO_TCP/IPPROTO_UDP options */
struct lbox_sockopt_reg {
/** Option name */
const char *name;
/** Option key */
int value;
/** 0 - unknown, 1 - int option, 2 - size_t option */
int type;
/** true if option is writable */
bool rw;
};
/** SOL_SOCKET options */
static const struct lbox_sockopt_reg so_opts[] = {
#ifdef SO_ACCEPTCONN
{"SO_ACCEPTCONN", SO_ACCEPTCONN, 1, 0, },
#endif
#ifdef SO_BINDTODEVICE
{"SO_BINDTODEVICE", SO_BINDTODEVICE, 2, 1, },
#endif
#ifdef SO_BROADCAST
{"SO_BROADCAST", SO_BROADCAST, 1, 1, },
#endif
#ifdef SO_DEBUG
{"SO_DEBUG", SO_DEBUG, 1, 1, },
#endif
#ifdef SO_DOMAIN
{"SO_DOMAIN", SO_DOMAIN, 1, 0, },
#endif
#ifdef SO_ERROR
{"SO_ERROR", SO_ERROR, 1, 0, },
#endif
#ifdef SO_DONTROUTE
{"SO_DONTROUTE", SO_DONTROUTE, 1, 1, },
#endif
#ifdef SO_KEEPALIVE
{"SO_KEEPALIVE", SO_KEEPALIVE, 1, 1, },
#endif
#ifdef SO_LINGER
{"SO_LINGER", SO_LINGER, 0, 0, },
#endif
#ifdef SO_MARK
{"SO_MARK", SO_MARK, 1, 1, },
#endif
#ifdef SO_OOBINLINE
{"SO_OOBINLINE", SO_OOBINLINE, 1, 1, },
#endif
#ifdef SO_PASSCRED
{"SO_PASSCRED", SO_PASSCRED, 1, 1, },
#endif
#ifdef SO_PEERCRED
{"SO_PEERCRED", SO_PEERCRED, 1, 0, },
#endif
#ifdef SO_PRIORITY
{"SO_PRIORITY", SO_PRIORITY, 1, 1, },
#endif
#ifdef SO_RCVBUF
{"SO_RCVBUF", SO_RCVBUF, 1, 1, },
#endif
#ifdef SO_RCVBUFFORCE
{"SO_RCVBUFFORCE", SO_RCVBUFFORCE, 1, 1, },
#endif
#ifdef SO_RCVLOWAT
{"SO_RCVLOWAT", SO_RCVLOWAT, 1, 1, },
#endif
#ifdef SO_SNDLOWAT
{"SO_SNDLOWAT", SO_SNDLOWAT, 1, 1, },
#endif
#ifdef SO_RCVTIMEO
{"SO_RCVTIMEO", SO_RCVTIMEO, 1, 1, },
#endif
#ifdef SO_SNDTIMEO
{"SO_SNDTIMEO", SO_SNDTIMEO, 1, 1, },
#endif
#ifdef SO_REUSEADDR
{"SO_REUSEADDR", SO_REUSEADDR, 1, 1, },
#endif
#ifdef SO_SNDBUF
{"SO_SNDBUF", SO_SNDBUF, 1, 1, },
#endif
#ifdef SO_SNDBUFFORCE
{"SO_SNDBUFFORCE", SO_SNDBUFFORCE, 1, 1, },
#endif
#ifdef SO_TIMESTAMP
{"SO_TIMESTAMP", SO_TIMESTAMP, 1, 1, },
#endif
#ifdef SO_PROTOCOL
{"SO_PROTOCOL", SO_PROTOCOL, 1, 0, },
#endif
#ifdef SO_NREAD /* available on Darwin */
{"SO_NREAD", SO_NREAD, 1, 0, },
#endif
{"SO_TYPE", SO_TYPE, 1, 0, },
{"", 0, 0, 0, }
};
/** IPPROTO_TCP options */
static const struct lbox_sockopt_reg so_tcp_opts[] = {
#ifdef TCP_NODELAY
{"TCP_NODELAY", TCP_NODELAY, 1, 1, },
#endif
#ifdef TCP_MAXSEG
{"TCP_MAXSEG", TCP_MAXSEG, 1, 1, },
#endif
#ifdef TCP_CORK
{"TCP_CORK", TCP_CORK, 1, 1, },
#endif
#ifdef TCP_KEEPIDLE
{"TCP_KEEPIDLE", TCP_KEEPIDLE, 1, 1, },
#endif
#ifdef TCP_KEEPINTVL
{"TCP_KEEPINTVL", TCP_KEEPINTVL, 1, 1, },
#endif
#ifdef TCP_KEEPCNT
{"TCP_KEEPCNT", TCP_KEEPCNT, 1, 1, },
#endif
#ifdef TCP_SYNCNT
{"TCP_SYNCNT", TCP_SYNCNT, 1, 1, },
#endif
#ifdef TCP_LINGER2
{"TCP_LINGER2", TCP_LINGER2, 1, 1, },
#endif
#ifdef TCP_DEFER_ACCEPT
{"TCP_DEFER_ACCEPT", TCP_DEFER_ACCEPT, 1, 1, },
#endif
#ifdef TCP_WINDOW_CLAMP
{"TCP_WINDOW_CLAMP", TCP_WINDOW_CLAMP, 1, 1, },
#endif
#ifdef TCP_INFO
{"TCP_INFO", TCP_INFO, 0, 0, },
#endif
#ifdef TCP_QUICKACK
{"TCP_QUICKACK", TCP_QUICKACK, 1, 1, },
#endif
#ifdef TCP_CONGESTION
{"TCP_CONGESTION", TCP_CONGESTION, 1, 1, },
#endif
#ifdef TCP_MD5SIG
{"TCP_MD5SIG", TCP_MD5SIG, 1, 1, },
#endif
#ifdef TCP_COOKIE_TRANSACTIONS
{"TCP_COOKIE_TRANSACTIONS", TCP_COOKIE_TRANSACTIONS, 1, 1, },
#endif
#ifdef TCP_THIN_LINEAR_TIMEOUTS
{"TCP_THIN_LINEAR_TIMEOUTS", TCP_THIN_LINEAR_TIMEOUTS, 1, 1, },
#endif
#ifdef TCP_THIN_DUPACK
{"TCP_THIN_DUPACK", TCP_THIN_DUPACK, 1, 1, },
#endif
#ifdef TCP_USER_TIMEOUT
{"TCP_USER_TIMEOUT", TCP_USER_TIMEOUT, 1, 1, },
#endif
#ifdef TCP_REPAIR
{"TCP_REPAIR", TCP_REPAIR, 1, 1, },
#endif
#ifdef TCP_REPAIR_QUEUE
{"TCP_REPAIR_QUEUE", TCP_REPAIR_QUEUE, 1, 1, },
#endif
#ifdef TCP_QUEUE_SEQ
{"TCP_QUEUE_SEQ", TCP_QUEUE_SEQ, 1, 1, },
#endif
#ifdef TCP_REPAIR_OPTIONS
{"TCP_REPAIR_OPTIONS", TCP_REPAIR_OPTIONS, 1, 1, },
#endif
#ifdef TCP_FASTOPEN
{"TCP_FASTOPEN", TCP_FASTOPEN, 1, 1, },
#endif
#ifdef TCP_TIMESTAMP
{"TCP_TIMESTAMP", TCP_TIMESTAMP, 1, 1, },
#endif
#ifdef TCP_NOTSENT_LOWAT
{"TCP_NOTSENT_LOWAT", TCP_NOTSENT_LOWAT, 1, 1, },
#endif
#ifdef TCP_CC_INFO
{"TCP_CC_INFO", TCP_CC_INFO, 1, 1, },
#endif
#ifdef TCP_SAVE_SYN
{"TCP_SAVE_SYN", TCP_SAVE_SYN, 1, 1, },
#endif
#ifdef TCP_SAVED_SYN
{"TCP_SAVED_SYN", TCP_SAVED_SYN, 1, 1, },
#endif
{"", 0, 0, 0, }
};
static const struct { char name[32]; int value; } ai_flags[] = {
#ifdef AI_PASSIVE
{"AI_PASSIVE", AI_PASSIVE },
#endif
#ifdef AI_CANONNAME
{"AI_CANONNAME", AI_CANONNAME },
#endif
#ifdef AI_NUMERICHOST
{"AI_NUMERICHOST", AI_NUMERICHOST },
#endif
#ifdef AI_V4MAPPED
{"AI_V4MAPPED", AI_V4MAPPED },
#endif
#ifdef AI_ALL
{"AI_ALL", AI_ALL },
#endif
#ifdef AI_ADDRCONFIG
{"AI_ADDRCONFIG", AI_ADDRCONFIG },
#endif
#ifdef AI_IDN
{"AI_IDN", AI_IDN },
#endif
#ifdef AI_CANONIDN
{"AI_CANONIDN", AI_CANONIDN },
#endif
#ifdef AI_IDN_ALLOW_UNASSIGNED
{"AI_IDN_ALLOW_UNASSIGNED", AI_IDN_ALLOW_UNASSIGNED },
#endif
#ifdef AI_IDN_USE_STD3_ASCII_RULES
{"AI_IDN_USE_STD3_ASCII_RULES", AI_IDN_USE_STD3_ASCII_RULES },
#endif
#ifdef AI_NUMERICSERV
{"AI_NUMERICSERV", AI_NUMERICSERV },
#endif
{"", 0 }
};
int
lbox_socket_local_resolve(const char *host, const char *port,
struct sockaddr *addr, socklen_t *socklen)
{
if (strcmp(host, "unix/") == 0) {
struct sockaddr_un *uaddr = (struct sockaddr_un *) addr;
if (*socklen < sizeof(*uaddr)) {
errno = ENOBUFS;
return -1;
}
memset(uaddr, 0, sizeof(*uaddr));
uaddr->sun_family = AF_UNIX;
snprintf(uaddr->sun_path, sizeof(uaddr->sun_path), "%s", port);
*socklen = sizeof(*uaddr);
return 0;
}
/* IPv4 */
in_addr_t iaddr = inet_addr(host);
if (iaddr != (in_addr_t)(-1)) {
struct sockaddr_in *inaddr = (struct sockaddr_in *) addr;
if (*socklen < sizeof(*inaddr)) {
errno = ENOBUFS;
return -1;
}
memset(inaddr, 0, sizeof(*inaddr));
inaddr->sin_family = AF_INET;
inaddr->sin_addr.s_addr = iaddr;
inaddr->sin_port = htons(atoi(port));
*socklen = sizeof(*inaddr);
return 0;
}
/* IPv6 */
struct in6_addr ipv6;
if (inet_pton(AF_INET6, host, &ipv6) == 1) {
struct sockaddr_in6 *inaddr6 = (struct sockaddr_in6 *) addr;
if (*socklen < sizeof(*inaddr6)) {
errno = ENOBUFS;
return -1;
}
memset(inaddr6, 0, sizeof(*inaddr6));
inaddr6->sin6_family = AF_INET6;
inaddr6->sin6_port = htons(atoi(port));
memcpy(inaddr6->sin6_addr.s6_addr, &ipv6, sizeof(ipv6));
*socklen = sizeof(*inaddr6);
return 0;
}
errno = EINVAL;
return -1;
}
int
lbox_socket_nonblock(int fh, int mode)
{
int flags = fcntl(fh, F_GETFL, 0);
if (flags < 0)
return -1;
/* GET */
if (mode == 0x80) {
if (flags & O_NONBLOCK)
return 1;
else
return 0;
}
if (mode) {
if (flags & O_NONBLOCK)
return 1;
flags |= O_NONBLOCK;
} else {
if ((flags & O_NONBLOCK) == 0)
return 0;
flags &= ~O_NONBLOCK;
}
flags = fcntl(fh, F_SETFL, flags);
if (flags < 0)
return -1;
return mode ? 1 : 0;
}
static int
lbox_socket_iowait(struct lua_State *L)
{
if (lua_gettop(L) < 2)
goto usage;
int fh = luaL_optinteger(L, 1, -1);
ev_tstamp timeout = luaL_optnumber(L, 3, TIMEOUT_INFINITY);
/*
* A special shortcut for gh-1204: if fd and events are nil then
* just sleep. This hack simplifies integration of third-party Lua
* modules with Tarantool event loop.
*/
if (unlikely(fh < 0)) {
if (!lua_isnil(L, 2))
goto usage;
/* Just sleep, like poll(0, NULL, timeout) */
fiber_sleep(timeout);
return 0;
}
if (likely(lua_type(L, 2) == LUA_TNUMBER)) {
/* Fast path: `events' is a bitmask of (COIO_READ|COIO_WRITE) */
int events = lua_tointeger(L, 2);
if (events <= 0 || events > (COIO_READ | COIO_WRITE))
goto usage;
int ret = coio_wait(fh, events, timeout);
lua_pushinteger(L, ret);
return 1;
}
/* Сonvenient version: `events' is a string ('R', 'W', 'RW') */
int events = 0;
const char *events_str = lua_tostring(L, 2);
if (events_str == NULL)
goto usage;
for (const char *e = events_str; *e != '\0'; ++e) {
/* Lower-case is needed to simplify integration with cqueues */
switch (*e) {
case 'r':
case 'R':
events |= COIO_READ;
break;
case 'w':
case 'W':
events |= COIO_WRITE;
break;
default:
goto usage;
}
}
if (events == 0)
goto usage;
int ret = coio_wait(fh, events, timeout);
luaL_testcancel(L);
const char *result[] = { "", "R", "W", "RW" };
assert(ret >= 0 && ret <= (COIO_READ | COIO_WRITE));
lua_pushstring(L, result[ret]);
return 1;
usage:
return luaL_error(L, "Usage: iowait(fd, 1 | 'r' | 2 | 'w' | 3 | 'rw'"
" [, timeout])");
}
static int
lbox_socket_push_family(struct lua_State *L, int family)
{
switch (family) {
#ifdef AF_UNIX
case AF_UNIX:
lua_pushliteral(L, "AF_UNIX");
break;
#endif
#ifdef AF_INET
case AF_INET:
lua_pushliteral(L, "AF_INET");
break;
#endif
#ifdef AF_INET6
case AF_INET6:
lua_pushliteral(L, "AF_INET6");
break;
#endif
#ifdef AF_IPX
case AF_IPX:
lua_pushliteral(L, "AF_IPX");
break;
#endif
#ifdef AF_NETLINK
case AF_NETLINK:
lua_pushliteral(L, "AF_NETLINK");
break;
#endif
#ifdef AF_X25
case AF_X25:
lua_pushliteral(L, "AF_X25");
break;
#endif
#ifdef AF_AX25
case AF_AX25:
lua_pushliteral(L, "AF_AX25");
break;
#endif
#ifdef AF_ATMPVC
case AF_ATMPVC:
lua_pushliteral(L, "AF_ATMPVC");
break;
#endif
#ifdef AF_APPLETALK
case AF_APPLETALK:
lua_pushliteral(L, "AF_APPLETALK");
break;
#endif
#ifdef AF_PACKET
case AF_PACKET:
lua_pushliteral(L, "AF_PACKET");
break;
#endif
default:
lua_pushinteger(L, family);
break;
}
return 1;
}
static int
lbox_socket_push_protocol(struct lua_State *L, int protonumber)
{
if (protonumber == 0) {
lua_pushinteger(L, 0);
return 1;
}
struct protoent *p = getprotobynumber(protonumber);
if (p) {
lua_pushstring(L, p->p_name);
} else {
lua_pushinteger(L, protonumber);
}
return 1;
}
static int
lbox_socket_push_sotype(struct lua_State *L, int sotype)
{
/* man 7 socket says that sotype can contain some flags */
#if defined(SOCK_NONBLOCK) && defined(SOCK_CLOEXEC)
sotype &= ~(SOCK_NONBLOCK | SOCK_CLOEXEC);
#endif
switch (sotype) {
#ifdef SOCK_STREAM
case SOCK_STREAM:
lua_pushliteral(L, "SOCK_STREAM");
break;
#endif
#ifdef SOCK_DGRAM
case SOCK_DGRAM:
lua_pushliteral(L, "SOCK_DGRAM");
break;
#endif
#ifdef SOCK_SEQPACKET
case SOCK_SEQPACKET:
lua_pushliteral(L, "SOCK_SEQPACKET");
break;
#endif
#ifdef SOCK_RAW
case SOCK_RAW:
lua_pushliteral(L, "SOCK_RAW");
break;
#endif
#ifdef SOCK_RDM
case SOCK_RDM:
lua_pushliteral(L, "SOCK_RDM");
break;
#endif
#ifdef SOCK_PACKET
case SOCK_PACKET:
lua_pushliteral(L, "SOCK_PACKET");
break;
#endif
default:
lua_pushinteger(L, sotype);
break;
}
return 1;
}
static int
lbox_socket_push_addr(struct lua_State *L,
const struct sockaddr *addr, socklen_t alen)
{
lua_newtable(L);
lua_pushliteral(L, "family");
lbox_socket_push_family(L, addr->sa_family);
lua_rawset(L, -3);
switch (addr->sa_family) {
case PF_INET:
case PF_INET6: {
char shost[NI_MAXHOST];
char sservice[NI_MAXSERV];
int rc = getnameinfo(addr,
alen,
shost, sizeof(shost),
sservice, sizeof(sservice),
NI_NUMERICHOST|NI_NUMERICSERV
);
if (rc == 0) {
lua_pushliteral(L, "host");
lua_pushstring(L, shost);
lua_rawset(L, -3);
lua_pushliteral(L, "port");
lua_pushinteger(L, atol(sservice));
lua_rawset(L, -3);
}
break;
}
case PF_UNIX:
lua_pushliteral(L, "host");
lua_pushliteral(L, "unix/");
lua_rawset(L, -3);
if (alen > sizeof(addr->sa_family)) {
lua_pushliteral(L, "port");
lua_pushstring(L,
((struct sockaddr_un *)addr)->sun_path);
lua_rawset(L, -3);
} else {
lua_pushliteral(L, "port");
lua_pushliteral(L, "");
lua_rawset(L, -3);
}
break;
default: /* unknown family */
lua_pop(L, 1);
lua_pushnil(L);
break;
}
return 1;
}
static int
lbox_getaddrinfo_result_wrapper(struct lua_State *L)
{
struct addrinfo *result = (struct addrinfo*)lua_topointer(L, 1);
lua_newtable(L);
int i = 1;
for (struct addrinfo *rp = result; rp; rp = rp->ai_next, i++) {
lua_pushinteger(L, i);
lbox_socket_push_addr(L, rp->ai_addr, rp->ai_addrlen);
if (lua_isnil(L, -1)) {
lua_pop(L, 2);
i--;
continue;
}
lua_pushliteral(L, "protocol");
lbox_socket_push_protocol(L, rp->ai_protocol);
lua_rawset(L, -3);
lua_pushliteral(L, "type");
lbox_socket_push_sotype(L, rp->ai_socktype);
lua_rawset(L, -3);
if (rp->ai_canonname) {
lua_pushliteral(L, "canonname");
lua_pushstring(L, rp->ai_canonname);
lua_rawset(L, -3);
}
lua_rawset(L, -3);
}
return 1;
}
static int
lbox_socket_getaddrinfo(struct lua_State *L)
{
assert(lua_gettop(L) == 4);
lua_pushvalue(L, 1);
const char *host = lua_tostring(L, -1);
lua_pushvalue(L, 2);
const char *port = lua_tostring(L, -1);
ev_tstamp timeout = lua_tonumber(L, 3);
struct addrinfo hints, *result = NULL;
memset(&hints, 0, sizeof(hints));
if (lua_istable(L, 4)) {
lua_getfield(L, 4, "family");
if (lua_isnumber(L, -1))
hints.ai_family = lua_tointeger(L, -1);
lua_pop(L, 1);
lua_getfield(L, 4, "type");
if (lua_isnumber(L, -1))
hints.ai_socktype = lua_tointeger(L, -1);
lua_pop(L, 1);
lua_getfield(L, 4, "protocol");
if (lua_isnumber(L, -1))
hints.ai_protocol = lua_tointeger(L, -1);
lua_pop(L, 1);
lua_getfield(L, 4, "flags");
if (lua_isnumber(L, -1))
hints.ai_flags = lua_tointeger(L, -1);
lua_pop(L, 1);
}
int dns_res = 0;
dns_res = coio_getaddrinfo(host, port, &hints, &result, timeout);
lua_pop(L, 2); /* host, port */
if (dns_res != 0) {
lua_pushnil(L);
return 1;
}
/* no results */
if (!result) {
lua_newtable(L);
return 1;
}
lua_pushcfunction(L, lbox_getaddrinfo_result_wrapper);
lua_pushlightuserdata(L, result);
int rc = luaT_call(L, 1, 1);
freeaddrinfo(result);
if (rc != 0)
return luaT_error(L);
return 1;
}
static int
lbox_socket_name(struct lua_State *L,
int (*getname_func) (int, struct sockaddr *, socklen_t *))
{
lua_pushvalue(L, 1);
int fh = lua_tointeger(L, -1);
lua_pop(L, 1);
struct sockaddr_storage addr;
socklen_t len = sizeof(addr);
if (getname_func(fh, (struct sockaddr *)&addr, &len) != 0) {
lua_pushnil(L);
return 1;
}
lbox_socket_push_addr(L, (const struct sockaddr *)&addr, len);
if (lua_isnil(L, -1))
return 1;
int type;
len = sizeof(type);
if (getsockopt(fh, SOL_SOCKET, SO_TYPE, &type, &len) == 0) {
lua_pushliteral(L, "type");
lbox_socket_push_sotype(L, type);
lua_rawset(L, -3);
} else {
type = -1;
}
int protocol = 0;
#ifdef SO_PROTOCOL
len = sizeof(protocol);
if (getsockopt(fh, SOL_SOCKET, SO_PROTOCOL, &protocol, &len) == 0) {
lua_pushliteral(L, "protocol");
lbox_socket_push_protocol(L, protocol);
lua_rawset(L, -3);
}
#else
if (addr.ss_family == AF_INET || addr.ss_family == AF_INET6) {
if (type == SOCK_STREAM)
protocol = IPPROTO_TCP;
if (type == SOCK_DGRAM)
protocol = IPPROTO_UDP;
}
lua_pushliteral(L, "protocol");
lbox_socket_push_protocol(L, protocol);
lua_rawset(L, -3);
#endif
return 1;
}
static int
lbox_socket_soname(struct lua_State *L)
{
return lbox_socket_name(L, getsockname);
}
static int
lbox_socket_peername(struct lua_State *L)
{
return lbox_socket_name(L, getpeername);
}
static int
lbox_socket_accept_wrapper(struct lua_State *L)
{
int sc = lua_tointeger(L, 1);
struct sockaddr_storage *fa = (struct sockaddr_storage*)
lua_topointer(L, 2);
socklen_t len = lua_tointeger(L, 3);
lua_pushnumber(L, sc);
lbox_socket_push_addr(L, (struct sockaddr *)fa, len);
return 2;
}
static int
lbox_socket_accept(struct lua_State *L)
{
int fh = lua_tointeger(L, 1);
struct sockaddr_storage fa;
socklen_t len = sizeof(fa);
int sc = accept(fh, (struct sockaddr*)&fa, &len);
if (sc < 0) {
if (errno != EAGAIN && errno != EWOULDBLOCK && errno != EINTR)
say_syserror("accept(%d)", fh);
lua_pushnil(L);
return 1;
}
lua_pushcfunction(L, lbox_socket_accept_wrapper);
lua_pushnumber(L, sc);
lua_pushlightuserdata(L, &fa);
lua_pushinteger(L, len);
if (luaT_call(L, 3, 2)) {
close(sc);
return luaT_error(L);
}
return 2;
}
static int
lbox_socket_recvfrom_wrapper(struct lua_State *L)
{
char *buf = (char *)lua_topointer(L, 1);
socklen_t len = lua_tointeger(L, 2);
lua_pushlstring(L, buf, len);
return 1;
}
static int
lbox_socket_recvfrom(struct lua_State *L)
{
int fh = lua_tointeger(L, 1);
int size = lua_tointeger(L, 2);
int flags = lua_tointeger(L, 3);
#ifdef TARGET_OS_DARWIN
int dgram_length = lua_tointeger(L, 4);
#else
flags |= MSG_TRUNC;
#endif
struct sockaddr_storage fa;
socklen_t len = sizeof(fa);
char *buf = (char *)malloc(size);
if (!buf) {
errno = ENOMEM;
lua_pushnil(L);
return 1;
}
ssize_t res = recvfrom(fh, buf, size, flags,
(struct sockaddr*)&fa, &len);
if (res < 0) {
free(buf);
lua_pushnil(L);
return 1;
#ifdef TARGET_OS_DARWIN
} else if (dgram_length > size) {
#else
} else if (res > size) {
#endif
free(buf);
lua_pushnil(L);
lbox_socket_push_addr(L, (struct sockaddr *)&fa, len);
errno = EMSGSIZE;
return 2;
}
lua_pushcfunction(L, lbox_socket_recvfrom_wrapper);
lua_pushlightuserdata(L, buf);
lua_pushinteger(L, res);
int rc = luaT_call(L, 2, 1);
free(buf);
if (rc)
return luaT_error(L);
lbox_socket_push_addr(L, (struct sockaddr *)&fa, len);
return 2;
}