555 lines
18 KiB
C
555 lines
18 KiB
C
/*=========================================================================*\
|
|
* Internet domain functions
|
|
* LuaSocket toolkit
|
|
\*=========================================================================*/
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "lua.h"
|
|
#include "lauxlib.h"
|
|
|
|
#include "inet.h"
|
|
|
|
/*=========================================================================*\
|
|
* Internal function prototypes.
|
|
\*=========================================================================*/
|
|
static int inet_global_toip(lua_State *L);
|
|
static int inet_global_getaddrinfo(lua_State *L);
|
|
static int inet_global_tohostname(lua_State *L);
|
|
static int inet_global_getnameinfo(lua_State *L);
|
|
static void inet_pushresolved(lua_State *L, struct hostent *hp);
|
|
static int inet_global_gethostname(lua_State *L);
|
|
|
|
/* DNS functions */
|
|
static luaL_Reg func[] = {
|
|
{ "toip", inet_global_toip},
|
|
{ "getaddrinfo", inet_global_getaddrinfo},
|
|
{ "tohostname", inet_global_tohostname},
|
|
{ "getnameinfo", inet_global_getnameinfo},
|
|
{ "gethostname", inet_global_gethostname},
|
|
{ NULL, NULL}
|
|
};
|
|
|
|
/*=========================================================================*\
|
|
* Exported functions
|
|
\*=========================================================================*/
|
|
/*-------------------------------------------------------------------------*\
|
|
* Initializes module
|
|
\*-------------------------------------------------------------------------*/
|
|
int inet_open(lua_State *L)
|
|
{
|
|
lua_pushstring(L, "dns");
|
|
lua_newtable(L);
|
|
luaL_openlib(L, NULL, func, 0);
|
|
lua_settable(L, -3);
|
|
return 0;
|
|
}
|
|
|
|
/*=========================================================================*\
|
|
* Global Lua functions
|
|
\*=========================================================================*/
|
|
/*-------------------------------------------------------------------------*\
|
|
* Returns all information provided by the resolver given a host name
|
|
* or ip address
|
|
\*-------------------------------------------------------------------------*/
|
|
static int inet_gethost(const char *address, struct hostent **hp) {
|
|
struct in_addr addr;
|
|
if (inet_aton(address, &addr))
|
|
return socket_gethostbyaddr((char *) &addr, sizeof(addr), hp);
|
|
else
|
|
return socket_gethostbyname(address, hp);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Returns all information provided by the resolver given a host name
|
|
* or ip address
|
|
\*-------------------------------------------------------------------------*/
|
|
static int inet_global_tohostname(lua_State *L) {
|
|
const char *address = luaL_checkstring(L, 1);
|
|
struct hostent *hp = NULL;
|
|
int err = inet_gethost(address, &hp);
|
|
if (err != IO_DONE) {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, socket_hoststrerror(err));
|
|
return 2;
|
|
}
|
|
lua_pushstring(L, hp->h_name);
|
|
inet_pushresolved(L, hp);
|
|
return 2;
|
|
}
|
|
|
|
static int inet_global_getnameinfo(lua_State *L) {
|
|
int i, ret;
|
|
char host[1024];
|
|
char serv[32];
|
|
struct addrinfo hints;
|
|
struct addrinfo *resolved, *iter;
|
|
const char *node = luaL_optstring(L, 1, NULL);
|
|
const char *service = luaL_optstring(L, 2, NULL);
|
|
|
|
if (!(node || service))
|
|
luaL_error(L, "You have to specify a hostname, a service, or both");
|
|
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_family = PF_UNSPEC;
|
|
|
|
/* getaddrinfo must get a node and a service argument */
|
|
ret = getaddrinfo(node ? node : "127.0.0.1", service ? service : "7",
|
|
&hints, &resolved);
|
|
if (ret != 0) {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, socket_gaistrerror(ret));
|
|
return 2;
|
|
}
|
|
|
|
lua_newtable(L);
|
|
for (i = 1, iter = resolved; iter; i++, iter = iter->ai_next) {
|
|
getnameinfo(iter->ai_addr, (socklen_t) iter->ai_addrlen, host,
|
|
node ? (socklen_t) sizeof(host) : 0, serv, service ? (socklen_t) sizeof(serv) : 0, 0);
|
|
|
|
if (node) {
|
|
lua_pushnumber(L, i);
|
|
lua_pushstring(L, host);
|
|
lua_settable(L, -3);
|
|
}
|
|
}
|
|
freeaddrinfo(resolved);
|
|
|
|
if (service) {
|
|
lua_pushstring(L, serv);
|
|
return 2;
|
|
} else {
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Returns all information provided by the resolver given a host name
|
|
* or ip address
|
|
\*-------------------------------------------------------------------------*/
|
|
static int inet_global_toip(lua_State *L)
|
|
{
|
|
const char *address = luaL_checkstring(L, 1);
|
|
struct hostent *hp = NULL;
|
|
int err = inet_gethost(address, &hp);
|
|
if (err != IO_DONE) {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, socket_hoststrerror(err));
|
|
return 2;
|
|
}
|
|
lua_pushstring(L, inet_ntoa(*((struct in_addr *) hp->h_addr)));
|
|
inet_pushresolved(L, hp);
|
|
return 2;
|
|
}
|
|
|
|
int inet_optfamily(lua_State* L, int narg, const char* def)
|
|
{
|
|
static const char* optname[] = { "unspec", "inet", "inet6", NULL };
|
|
static int optvalue[] = { PF_UNSPEC, PF_INET, PF_INET6, 0 };
|
|
|
|
return optvalue[luaL_checkoption(L, narg, def, optname)];
|
|
}
|
|
|
|
int inet_optsocktype(lua_State* L, int narg, const char* def)
|
|
{
|
|
static const char* optname[] = { "stream", "dgram", NULL };
|
|
static int optvalue[] = { SOCK_STREAM, SOCK_DGRAM, 0 };
|
|
|
|
return optvalue[luaL_checkoption(L, narg, def, optname)];
|
|
}
|
|
|
|
static int inet_global_getaddrinfo(lua_State *L)
|
|
{
|
|
const char *hostname = luaL_checkstring(L, 1);
|
|
struct addrinfo *iterator = NULL, *resolved = NULL;
|
|
struct addrinfo hints;
|
|
int i = 1, ret = 0;
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_family = PF_UNSPEC;
|
|
ret = getaddrinfo(hostname, NULL, &hints, &resolved);
|
|
if (ret != 0) {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, socket_gaistrerror(ret));
|
|
return 2;
|
|
}
|
|
lua_newtable(L);
|
|
for (iterator = resolved; iterator; iterator = iterator->ai_next) {
|
|
char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV];
|
|
getnameinfo(iterator->ai_addr, (socklen_t) iterator->ai_addrlen, hbuf,
|
|
(socklen_t) sizeof(hbuf), sbuf, 0, NI_NUMERICHOST);
|
|
lua_pushnumber(L, i);
|
|
lua_newtable(L);
|
|
switch (iterator->ai_family) {
|
|
case AF_INET:
|
|
lua_pushliteral(L, "family");
|
|
lua_pushliteral(L, "inet");
|
|
lua_settable(L, -3);
|
|
break;
|
|
case AF_INET6:
|
|
lua_pushliteral(L, "family");
|
|
lua_pushliteral(L, "inet6");
|
|
lua_settable(L, -3);
|
|
break;;
|
|
}
|
|
lua_pushliteral(L, "addr");
|
|
lua_pushstring(L, hbuf);
|
|
lua_settable(L, -3);
|
|
lua_settable(L, -3);
|
|
i++;
|
|
}
|
|
freeaddrinfo(resolved);
|
|
return 1;
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Gets the host name
|
|
\*-------------------------------------------------------------------------*/
|
|
static int inet_global_gethostname(lua_State *L)
|
|
{
|
|
char name[257];
|
|
name[256] = '\0';
|
|
if (gethostname(name, 256) < 0) {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, socket_strerror(errno));
|
|
return 2;
|
|
} else {
|
|
lua_pushstring(L, name);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/*=========================================================================*\
|
|
* Lua methods
|
|
\*=========================================================================*/
|
|
/*-------------------------------------------------------------------------*\
|
|
* Retrieves socket peer name
|
|
\*-------------------------------------------------------------------------*/
|
|
int inet_meth_getpeername(lua_State *L, p_socket ps, int family)
|
|
{
|
|
switch (family) {
|
|
case PF_INET: {
|
|
struct sockaddr_in peer;
|
|
socklen_t peer_len = sizeof(peer);
|
|
char name[INET_ADDRSTRLEN];
|
|
if (getpeername(*ps, (SA *) &peer, &peer_len) < 0) {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, socket_strerror(errno));
|
|
return 2;
|
|
} else {
|
|
inet_ntop(family, &peer.sin_addr, name, sizeof(name));
|
|
lua_pushstring(L, name);
|
|
lua_pushnumber(L, ntohs(peer.sin_port));
|
|
lua_pushliteral(L, "inet");
|
|
return 3;
|
|
}
|
|
}
|
|
case PF_INET6: {
|
|
struct sockaddr_in6 peer;
|
|
socklen_t peer_len = sizeof(peer);
|
|
char name[INET6_ADDRSTRLEN];
|
|
if (getpeername(*ps, (SA *) &peer, &peer_len) < 0) {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, socket_strerror(errno));
|
|
return 2;
|
|
} else {
|
|
inet_ntop(family, &peer.sin6_addr, name, sizeof(name));
|
|
lua_pushstring(L, name);
|
|
lua_pushnumber(L, ntohs(peer.sin6_port));
|
|
lua_pushliteral(L, "inet6");
|
|
return 3;
|
|
}
|
|
}
|
|
default:
|
|
lua_pushnil(L);
|
|
lua_pushfstring(L, "unknown family %d", family);
|
|
return 2;
|
|
}
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Retrieves socket local name
|
|
\*-------------------------------------------------------------------------*/
|
|
int inet_meth_getsockname(lua_State *L, p_socket ps, int family)
|
|
{
|
|
switch (family) {
|
|
case PF_INET: {
|
|
struct sockaddr_in local;
|
|
socklen_t local_len = sizeof(local);
|
|
char name[INET_ADDRSTRLEN];
|
|
if (getsockname(*ps, (SA *) &local, &local_len) < 0) {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, socket_strerror(errno));
|
|
return 2;
|
|
} else {
|
|
inet_ntop(family, &local.sin_addr, name, sizeof(name));
|
|
lua_pushstring(L, name);
|
|
lua_pushnumber(L, ntohs(local.sin_port));
|
|
lua_pushliteral(L, "inet");
|
|
return 3;
|
|
}
|
|
}
|
|
case PF_INET6: {
|
|
struct sockaddr_in6 local;
|
|
socklen_t local_len = sizeof(local);
|
|
char name[INET6_ADDRSTRLEN];
|
|
if (getsockname(*ps, (SA *) &local, &local_len) < 0) {
|
|
lua_pushnil(L);
|
|
lua_pushstring(L, socket_strerror(errno));
|
|
return 2;
|
|
} else {
|
|
inet_ntop(family, &local.sin6_addr, name, sizeof(name));
|
|
lua_pushstring(L, name);
|
|
lua_pushnumber(L, ntohs(local.sin6_port));
|
|
lua_pushliteral(L, "inet6");
|
|
return 3;
|
|
}
|
|
}
|
|
default:
|
|
lua_pushnil(L);
|
|
lua_pushfstring(L, "unknown family %d", family);
|
|
return 2;
|
|
}
|
|
}
|
|
|
|
/*=========================================================================*\
|
|
* Internal functions
|
|
\*=========================================================================*/
|
|
/*-------------------------------------------------------------------------*\
|
|
* Passes all resolver information to Lua as a table
|
|
\*-------------------------------------------------------------------------*/
|
|
static void inet_pushresolved(lua_State *L, struct hostent *hp)
|
|
{
|
|
char **alias;
|
|
struct in_addr **addr;
|
|
int i, resolved;
|
|
lua_newtable(L); resolved = lua_gettop(L);
|
|
lua_pushstring(L, "name");
|
|
lua_pushstring(L, hp->h_name);
|
|
lua_settable(L, resolved);
|
|
lua_pushstring(L, "ip");
|
|
lua_pushstring(L, "alias");
|
|
i = 1;
|
|
alias = hp->h_aliases;
|
|
lua_newtable(L);
|
|
if (alias) {
|
|
while (*alias) {
|
|
lua_pushnumber(L, i);
|
|
lua_pushstring(L, *alias);
|
|
lua_settable(L, -3);
|
|
i++; alias++;
|
|
}
|
|
}
|
|
lua_settable(L, resolved);
|
|
i = 1;
|
|
lua_newtable(L);
|
|
addr = (struct in_addr **) hp->h_addr_list;
|
|
if (addr) {
|
|
while (*addr) {
|
|
lua_pushnumber(L, i);
|
|
lua_pushstring(L, inet_ntoa(**addr));
|
|
lua_settable(L, -3);
|
|
i++; addr++;
|
|
}
|
|
}
|
|
lua_settable(L, resolved);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Tries to create a new inet socket
|
|
\*-------------------------------------------------------------------------*/
|
|
const char *inet_trycreate(p_socket ps, int family, int type) {
|
|
return socket_strerror(socket_create(ps, family, type, 0));
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* "Disconnects" a DGRAM socket
|
|
\*-------------------------------------------------------------------------*/
|
|
const char *inet_trydisconnect(p_socket ps, int family, p_timeout tm)
|
|
{
|
|
switch (family) {
|
|
case PF_INET: {
|
|
struct sockaddr_in sin;
|
|
memset((char *) &sin, 0, sizeof(sin));
|
|
sin.sin_family = AF_UNSPEC;
|
|
sin.sin_addr.s_addr = INADDR_ANY;
|
|
return socket_strerror(socket_connect(ps, (SA *) &sin,
|
|
sizeof(sin), tm));
|
|
}
|
|
case PF_INET6: {
|
|
struct sockaddr_in6 sin6;
|
|
struct in6_addr addrany = IN6ADDR_ANY_INIT;
|
|
memset((char *) &sin6, 0, sizeof(sin6));
|
|
sin6.sin6_family = AF_UNSPEC;
|
|
sin6.sin6_addr = addrany;
|
|
return socket_strerror(socket_connect(ps, (SA *) &sin6,
|
|
sizeof(sin6), tm));
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Tries to connect to remote address (address, port)
|
|
\*-------------------------------------------------------------------------*/
|
|
const char *inet_tryconnect(p_socket ps, const char *address,
|
|
const char *serv, p_timeout tm, struct addrinfo *connecthints)
|
|
{
|
|
struct addrinfo *iterator = NULL, *resolved = NULL;
|
|
const char *err = NULL;
|
|
/* try resolving */
|
|
err = socket_gaistrerror(getaddrinfo(address, serv,
|
|
connecthints, &resolved));
|
|
if (err != NULL) {
|
|
if (resolved) freeaddrinfo(resolved);
|
|
return err;
|
|
}
|
|
for (iterator = resolved; iterator; iterator = iterator->ai_next) {
|
|
timeout_markstart(tm);
|
|
/* try connecting to remote address */
|
|
err = socket_strerror(socket_connect(ps, (SA *) iterator->ai_addr,
|
|
(socklen_t) iterator->ai_addrlen, tm));
|
|
/* if success, break out of loop */
|
|
if (err == NULL) break;
|
|
}
|
|
freeaddrinfo(resolved);
|
|
/* here, if err is set, we failed */
|
|
return err;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Tries to accept a socket
|
|
\*-------------------------------------------------------------------------*/
|
|
const char *inet_tryaccept(p_socket server, int family, p_socket client, p_timeout tm)
|
|
{
|
|
socklen_t len;
|
|
t_sockaddr_storage addr;
|
|
if (family == PF_INET6) {
|
|
len = sizeof(struct sockaddr_in6);
|
|
} else {
|
|
len = sizeof(struct sockaddr_in);
|
|
}
|
|
return socket_strerror(socket_accept(server, client, (SA *) &addr, &len, tm));
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Tries to bind socket to (address, port)
|
|
\*-------------------------------------------------------------------------*/
|
|
const char *inet_trybind(p_socket ps, const char *address, const char *serv,
|
|
struct addrinfo *bindhints)
|
|
{
|
|
struct addrinfo *iterator = NULL, *resolved = NULL;
|
|
const char *err = NULL;
|
|
t_socket sock = *ps;
|
|
/* try resolving */
|
|
err = socket_gaistrerror(getaddrinfo(address, serv, bindhints, &resolved));
|
|
if (err) {
|
|
if (resolved) freeaddrinfo(resolved);
|
|
return err;
|
|
}
|
|
/* iterate over resolved addresses until one is good */
|
|
for (iterator = resolved; iterator; iterator = iterator->ai_next) {
|
|
if(sock == SOCKET_INVALID) {
|
|
err = socket_strerror(socket_create(&sock, iterator->ai_family,
|
|
iterator->ai_socktype, iterator->ai_protocol));
|
|
if(err)
|
|
continue;
|
|
}
|
|
/* try binding to local address */
|
|
err = socket_strerror(socket_bind(&sock,
|
|
(SA *) iterator->ai_addr,
|
|
(socklen_t) iterator->ai_addrlen));
|
|
|
|
/* keep trying unless bind succeeded */
|
|
if (err) {
|
|
if(sock != *ps)
|
|
socket_destroy(&sock);
|
|
} else {
|
|
/* remember what we connected to, particularly the family */
|
|
*bindhints = *iterator;
|
|
break;
|
|
}
|
|
}
|
|
/* cleanup and return error */
|
|
freeaddrinfo(resolved);
|
|
*ps = sock;
|
|
return err;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* Some systems do not provide this so that we provide our own. It's not
|
|
* marvelously fast, but it works just fine.
|
|
\*-------------------------------------------------------------------------*/
|
|
#ifdef INET_ATON
|
|
int inet_aton(const char *cp, struct in_addr *inp)
|
|
{
|
|
unsigned int a = 0, b = 0, c = 0, d = 0;
|
|
int n = 0, r;
|
|
unsigned long int addr = 0;
|
|
r = sscanf(cp, "%u.%u.%u.%u%n", &a, &b, &c, &d, &n);
|
|
if (r == 0 || n == 0) return 0;
|
|
cp += n;
|
|
if (*cp) return 0;
|
|
if (a > 255 || b > 255 || c > 255 || d > 255) return 0;
|
|
if (inp) {
|
|
addr += a; addr <<= 8;
|
|
addr += b; addr <<= 8;
|
|
addr += c; addr <<= 8;
|
|
addr += d;
|
|
inp->s_addr = htonl(addr);
|
|
}
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
/*-------------------------------------------------------------------------*\
|
|
* inet_ntop/inet_pton for MinGW from
|
|
* http://mingw-users.1079350.n2.nabble.com/IPv6-getaddrinfo-amp-inet-ntop-td5891996.html
|
|
\*-------------------------------------------------------------------------*/
|
|
|
|
#ifdef INET_PTON
|
|
const char *inet_ntop(int af, const void *src, char *dst, socklen_t cnt)
|
|
{
|
|
if (af == AF_INET) {
|
|
struct sockaddr_in in;
|
|
memset(&in, 0, sizeof(in));
|
|
in.sin_family = AF_INET;
|
|
memcpy(&in.sin_addr, src, sizeof(struct in_addr));
|
|
getnameinfo((struct sockaddr *)&in, sizeof(struct sockaddr_in),
|
|
dst, cnt, NULL, 0, NI_NUMERICHOST);
|
|
return dst;
|
|
} else if (af == AF_INET6) {
|
|
struct sockaddr_in6 in;
|
|
memset(&in, 0, sizeof(in));
|
|
in.sin6_family = AF_INET6;
|
|
memcpy(&in.sin6_addr, src, sizeof(struct in_addr6));
|
|
getnameinfo((struct sockaddr *)&in, sizeof(struct sockaddr_in6),
|
|
dst, cnt, NULL, 0, NI_NUMERICHOST);
|
|
return dst;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int inet_pton(int af, const char *src, void *dst)
|
|
{
|
|
struct addrinfo hints, *res, *ressave;
|
|
memset(&hints, 0, sizeof(struct addrinfo));
|
|
hints.ai_family = af;
|
|
if (getaddrinfo(src, NULL, &hints, &res) != 0) {
|
|
return -1;
|
|
}
|
|
ressave = res;
|
|
while (res) {
|
|
memcpy(dst, res->ai_addr, res->ai_addrlen);
|
|
res = res->ai_next;
|
|
}
|
|
freeaddrinfo(ressave);
|
|
return 0;
|
|
}
|
|
|
|
#endif
|