#include <stdio.h>
#include <stdlib.h>
-#include <sys/poll.h>
-#include <netinet/in.h>
+#include <sys/types.h>
#include <sys/socket.h>
+#include <netinet/in.h>
+
+#ifndef __USE_MISC
+#define __USE_MISC /* inet_aton */
+#endif
+
+#include <arpa/inet.h>
#include <sys/un.h>
+#include <sys/poll.h>
#include <errno.h>
#include <fcntl.h>
#include "../lib/strlfunc.h"
static long nextidentifier = 0;
static void lua_socket_poll_event(int fd, short events);
+static int setnonblock(int fd) {
+ int ret;
+
+ /* WTB exceptions */
+ ret = fcntl(fd, F_GETFL, 0);
+ if(ret < 0) {
+ close(fd);
+ return -1;
+ }
+
+ ret = fcntl(fd, F_SETFL, ret | O_NONBLOCK);
+ if(ret < 0) {
+ close(fd);
+ return -1;
+ }
+
+ return fd;
+}
+static int getunixsocket(char *path, struct sockaddr_un *r) {
+ int fd = socket(AF_UNIX, SOCK_STREAM, 0);
+
+ if(fd <= -1)
+ return -1;
+
+ memset(r, 0, sizeof(struct sockaddr_un));
+ r->sun_family = PF_UNIX;
+ strlcpy(r->sun_path, path, sizeof(r->sun_path));
+
+ return setnonblock(fd);
+}
+
+/* note ADDRESS not HOSTNAME */
+static int getipsocket(char *address, int port, int protocol, struct sockaddr_in *r) {
+ int fd;
+ int val = 1;
+
+ memset(r, 0, sizeof(struct sockaddr_in));
+ r->sin_family = PF_INET;
+
+ if(address) {
+ if(!inet_aton(address, &r->sin_addr)) {
+ Error("lua", ERR_ERROR, "Could not parse address: %s", address);
+ return -1;
+ }
+ } else {
+ address = INADDR_ANY;
+ }
+
+ fd = socket(AF_INET, protocol, 0);
+
+ if(fd <= -1)
+ return -1;
+
+ setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
+
+ r->sin_port = htons(port);
+ return setnonblock(fd);
+}
+
+static void registerluasocket(lua_list *ll, lua_socket *ls, int mask, int settag) {
+ /* this whole identifier thing should probably use userdata stuff */
+ ls->identifier = nextidentifier++;
+
+ if(settag) {
+ ls->tag = luaL_ref(ll->l, LUA_REGISTRYINDEX);
+ ls->handler = luaL_ref(ll->l, LUA_REGISTRYINDEX);
+ }
+ ls->l = ll;
+
+ ls->next = ll->sockets;
+ ll->sockets = ls;
+
+ registerhandler(ls->fd, mask, lua_socket_poll_event);
+}
+
+static int handleconnect(int ret, lua_State *l, lua_list *ll, lua_socket *ls) {
+ if(ret == 0) {
+ ls->state = SOCKET_CONNECTED;
+ } else if(ret == -1 && (errno == EINPROGRESS)) {
+ ls->state = SOCKET_CONNECTING;
+ } else {
+ luafree(ls);
+ close(ls->fd);
+ return 0;
+ }
+
+ ls->parent = NULL;
+ registerluasocket(ll, ls, (ls->state==SOCKET_CONNECTED?POLLIN:POLLOUT) | POLLERR | POLLHUP, 1);
+
+ lua_pushboolean(l, ls->state==SOCKET_CONNECTED?1:0);
+ lua_pushlong(l, ls->identifier);
+ return 2;
+}
+
static int lua_socket_unix_connect(lua_State *l) {
- int len, ret;
+ int ret;
struct sockaddr_un r;
char *path;
lua_socket *ls;
if(!path)
return 0;
- ls = (lua_socket *)malloc(sizeof(lua_socket));
+ ls = (lua_socket *)luamalloc(sizeof(lua_socket));
if(!ls)
return 0;
- ls->fd = socket(AF_UNIX, SOCK_STREAM, 0);
- if(ls->fd <= -1) {
- free(ls);
+ ls->sockettype = PF_UNIX;
+ ls->fd = getunixsocket(path, &r);
+ if(ls->fd < 0) {
+ luafree(ls);
return 0;
}
- memset(&r, 0, sizeof(r));
- r.sun_family = AF_UNIX;
- strlcpy(r.sun_path, path, sizeof(r.sun_path));
+ ret = connect(ls->fd, (struct sockaddr *)&r, sizeof(r.sun_family) + strlen(r.sun_path));
+ return handleconnect(ret, l, ll, ls);
+}
- /* don't really like this, there's a macro in sys/un.h but it's not there under FreeBSD */
- len = sizeof(r.sun_family) + strlen(r.sun_path) + 1;
+static int lua_socket_unix_bind(lua_State *l) {
+ lua_list *ll;
+ char *path;
+ lua_socket *ls;
+ struct sockaddr_un r;
- /* WTB exceptions */
- ret = fcntl(ls->fd, F_GETFL, 0);
- if(ret < 0) {
- free(ls);
- close(ls->fd);
+ ll = lua_listfromstate(l);
+ if(!ll)
+ return 0;
+
+ if(!lua_isfunction(l, 2))
+ return 0;
+
+ path = (char *)lua_tostring(l, 1);
+ if(!path)
+ return 0;
+
+ ls = (lua_socket *)luamalloc(sizeof(lua_socket));
+ if(!ls)
+ return 0;
+
+ ls->sockettype = PF_UNIX;
+ ls->fd = getunixsocket(path, &r);
+ if(ls->fd <= -1) {
+ luafree(ls);
return 0;
}
- ret = fcntl(ls->fd, F_SETFL, ret | O_NONBLOCK);
- if(ret < 0) {
- free(ls);
+ unlink(path);
+
+ if(
+ (bind(ls->fd, (struct sockaddr *)&r, strlen(r.sun_path) + sizeof(r.sun_family)) == -1) ||
+ (listen(ls->fd, 5) == -1)
+ ) {
close(ls->fd);
+ luafree(ls);
return 0;
}
- ret = connect(ls->fd, (struct sockaddr *)&r, len);
- if(ret == 0) {
- ls->state = SOCKET_CONNECTED;
- } else if(ret == -1 && (errno == EINPROGRESS)) {
- ls->state = SOCKET_CONNECTING;
- } else {
- free(ls);
- close(ls->fd);
+ ls->state = SOCKET_LISTENING;
+ ls->parent = NULL;
+
+ registerluasocket(ll, ls, POLLIN, 1);
+
+ lua_pushlong(l, ls->identifier);
+ return 1;
+}
+
+static int lua_socket_ip_connect(lua_State *l, int protocol) {
+ int ret;
+ struct sockaddr_in r;
+ char *address;
+ int port;
+ lua_socket *ls;
+ lua_list *ll;
+
+ ll = lua_listfromstate(l);
+ if(!ll)
+ return 0;
+
+ if(!lua_isfunction(l, 3) || !lua_islong(l, 2))
+ return 0;
+
+ address = (char *)lua_tostring(l, 1);
+ if(!address)
+ return 0;
+
+ port = lua_tolong(l, 2);
+
+ ls = (lua_socket *)luamalloc(sizeof(lua_socket));
+ if(!ls)
+ return 0;
+
+ ls->sockettype = PF_INET;
+ ls->fd = getipsocket(address, port, protocol, &r);
+ if(ls->fd < 0) {
+ luafree(ls);
return 0;
}
- /* this whole identifier thing should probably use userdata stuff */
- ls->identifier = nextidentifier++;
- ls->tag = luaL_ref(l, LUA_REGISTRYINDEX);
- ls->handler = luaL_ref(l, LUA_REGISTRYINDEX);
+ ret = connect(ls->fd, (struct sockaddr *)&r, sizeof(struct sockaddr_in));
+ return handleconnect(ret, l, ll, ls);
+}
- ls->l = ll;
+static int lua_socket_ip_bind(lua_State *l, int protocol) {
+ lua_list *ll;
+ char *address;
+ int port;
+ lua_socket *ls;
+ struct sockaddr_in r;
- ls->next = ll->sockets;
- ll->sockets = ls;
+ ll = lua_listfromstate(l);
+ if(!ll)
+ return 0;
- registerhandler(ls->fd, (ls->state==SOCKET_CONNECTED?POLLIN:POLLOUT) | POLLERR | POLLHUP, lua_socket_poll_event);
+ if(!lua_isfunction(l, 3) || !lua_islong(l, 2))
+ return 0;
+
+ /* address can be nil or a string */
+ if(!lua_isnil(l, 1) && !lua_isstring(l, 1))
+ return 0;
+
+ address = (char *)lua_tostring(l, 1);
+ port = lua_tolong(l, 2);
+
+ ls = (lua_socket *)luamalloc(sizeof(lua_socket));
+ if(!ls)
+ return 0;
+
+ ls->sockettype = PF_INET;
+ ls->fd = getipsocket(address, port, protocol, &r);
+ if(ls->fd <= -1) {
+ luafree(ls);
+ return 0;
+ }
+
+ if(
+ (bind(ls->fd, (struct sockaddr *)&r, sizeof(struct sockaddr_in)) == -1) ||
+ (listen(ls->fd, 5) == -1)
+ ) {
+ close(ls->fd);
+ luafree(ls);
+ return 0;
+ }
+
+ ls->state = SOCKET_LISTENING;
+ ls->parent = NULL;
+
+ registerluasocket(ll, ls, POLLIN, 1);
- lua_pushboolean(l, ls->state==SOCKET_CONNECTED?1:0);
lua_pushlong(l, ls->identifier);
- return 2;
+ return 1;
+}
+
+static int lua_socket_tcp_connect(lua_State *l) {
+ return lua_socket_ip_connect(l, SOCK_STREAM);
+}
+
+static int lua_socket_tcp_bind(lua_State *l) {
+ return lua_socket_ip_bind(l, SOCK_STREAM);
+}
+
+static int lua_socket_udp_connect(lua_State *l) {
+ return lua_socket_ip_connect(l, SOCK_DGRAM);
+}
+
+static int lua_socket_udp_bind(lua_State *l) {
+ return lua_socket_ip_bind(l, SOCK_DGRAM);
}
static lua_socket *socketbyfd(int fd) {
static void lua_socket_call_close(lua_socket *ls) {
lua_socket *p, *c;
+ for(c=ls->l->sockets;c;c=p) {
+ p = c->next;
+ if(c->parent == ls)
+ lua_socket_call_close(c);
+ }
+
for(c=ls->l->sockets,p=NULL;c;p=c,c=c->next) {
if(c == ls) {
if(ls->state == SOCKET_CLOSED)
p->next = ls->next;
}
- luaL_unref(ls->l->l, LUA_REGISTRYINDEX, ls->tag);
- luaL_unref(ls->l->l, LUA_REGISTRYINDEX, ls->handler);
+ if(!ls->parent) {
+ luaL_unref(ls->l->l, LUA_REGISTRYINDEX, ls->tag);
+ luaL_unref(ls->l->l, LUA_REGISTRYINDEX, ls->handler);
+ }
- free(ls);
+ luafree(ls);
return;
}
}
-
}
static int lua_socket_write(lua_State *l) {
lua_vnpcall(ls, "read", "L", buf, (long)bytesread);
}
break;
+ case SOCKET_LISTENING:
+ if(events & POLLIN) {
+ struct sockaddr_in rip;
+ struct sockaddr_un run;
+ lua_socket *ls2;
+ unsigned int len;
+ int fd2;
+
+ if(ls->sockettype == PF_INET) {
+ len = sizeof(rip);
+ fd2 = accept(fd, (struct sockaddr *)&rip, &len);
+ } else {
+ len = sizeof(run);
+ fd2 = accept(fd, (struct sockaddr *)&run, &len);
+ }
+ if(fd2 == -1)
+ return;
+
+ ls2 = (lua_socket *)luamalloc(sizeof(lua_socket));
+ if(!ls2) {
+ close(fd2);
+ return;
+ }
+
+ ls2->fd = fd2;
+ ls2->state = SOCKET_CONNECTED;
+ ls2->tag = ls->tag;
+ ls2->handler = ls->handler;
+ ls2->parent = ls;
+ ls2->sockettype = ls->sockettype;
+
+ registerluasocket(ls->l, ls2, POLLIN | POLLERR | POLLHUP, 0);
+ lua_vnpcall(ls, "accept", "l", ls2->identifier);
+ }
+ break;
}
}
void lua_registersocketcommands(lua_State *l) {
lua_register(l, "socket_unix_connect", lua_socket_unix_connect);
+ lua_register(l, "socket_unix_bind", lua_socket_unix_bind);
+ lua_register(l, "socket_tcp_connect", lua_socket_tcp_connect);
+ lua_register(l, "socket_tcp_bind", lua_socket_tcp_bind);
+ lua_register(l, "socket_udp_connect", lua_socket_udp_connect);
+ lua_register(l, "socket_udp_bind", lua_socket_udp_bind);
lua_register(l, "socket_close", lua_socket_close);
lua_register(l, "socket_write", lua_socket_write);
}