#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"
#include "../core/events.h"
#include "lua.h"
#include "luabot.h"
-#define lua_vnpcall(F2, N2, S2, ...) _lua_vpcall(F2->l->l, (void *)F2->handler, LUA_POINTERMODE, "ls" S2 , F2->identifier, N2 , ##__VA_ARGS__)
+#define lua_vnpcall(F2, N2, S2, ...) _lua_vpcall(F2->l->l, (void *)F2->handler, LUA_POINTERMODE, "lsR" S2 , F2->identifier, N2, F2->tag , ##__VA_ARGS__)
/*
* instead of these identifiers I could just use the file descriptor...
* BUT I can't remember the exact semantics of the fd table WRT reuse...
*/
static long nextidentifier = 0;
-void lua_socket_poll_event(int fd, short events);
+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(!ll)
return 0;
+ if(!lua_isfunction(l, 2))
+ return 0;
+
path = (char *)lua_tostring(l, 1);
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);
+}
+
+static int lua_socket_unix_bind(lua_State *l) {
+ lua_list *ll;
+ char *path;
+ lua_socket *ls;
+ struct sockaddr_un r;
- /* 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;
+ ll = lua_listfromstate(l);
+ if(!ll)
+ return 0;
- /*
- * this socket is blocking.
- * we could potentially block the IRC socket...
- * BUT it's far far too much work to make it writes non-blocking...
- */
- ret = connect(ls->fd, (struct sockaddr *)&r, len);
- if(ret < 0) {
- free(ls);
+ 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;
+ }
+
+ 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;
}
- /* this whole identifier thing should probably use userdata stuff */
- ls->identifier = nextidentifier++;
- ls->handler = luaL_ref(l, LUA_REGISTRYINDEX);
- ls->l = ll;
+ ls->state = SOCKET_LISTENING;
+ ls->parent = NULL;
- ls->next = ll->sockets;
- ll->sockets = ls;
+ registerluasocket(ll, ls, POLLIN, 1);
- registerhandler(ls->fd, POLLIN | POLLERR | POLLHUP, lua_socket_poll_event);
+ 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;
+ }
+
+ ret = connect(ls->fd, (struct sockaddr *)&r, sizeof(struct sockaddr_in));
+ return handleconnect(ret, l, ll, ls);
+}
+
+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;
+
+ ll = lua_listfromstate(l);
+ if(!ll)
+ return 0;
+
+ 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_pushlong(l, ls->identifier);
return 1;
}
-lua_socket *socketbyfd(int fd) {
+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) {
lua_list *l;
lua_socket *ls;
return NULL;
}
-lua_socket *socketbyidentifier(long identifier) {
+static lua_socket *socketbyidentifier(long identifier) {
lua_list *l;
lua_socket *ls;
return NULL;
}
-void lua_socket_call_close(lua_socket *ls) {
+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)
+ return;
+
+ ls->state = SOCKET_CLOSED;
deregisterhandler(ls->fd, 1);
lua_vnpcall(ls, "close", "");
p->next = ls->next;
}
- 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_socket *ls;
int ret;
- if(!lua_islong(l, 1))
- LUA_RETURN(l, LUA_FAIL);
-
buf = (char *)lua_tostring(l, 2);
- if(!buf)
- LUA_RETURN(l, LUA_FAIL);
+ if(!lua_islong(l, 1) || !buf) {
+ lua_pushint(l, -1);
+ return 1;
+ }
len = lua_strlen(l, 2);
ls = socketbyidentifier(lua_tolong(l, 1));
- if(!ls)
- LUA_RETURN(l, LUA_FAIL);
+ if(!ls || (ls->state != SOCKET_CONNECTED)) {
+ lua_pushint(l, -1);
+ return 1;
+ }
ret = write(ls->fd, buf, len);
- if(ret != len) {
- lua_socket_call_close(ls);
- lua_pushint(l, -1);
+ if(ret == -1 && (errno == EAGAIN)) {
+ deregisterhandler(ls->fd, 0);
+ registerhandler(ls->fd, POLLIN | POLLOUT | POLLERR | POLLHUP, lua_socket_poll_event);
+
+ lua_pushint(l, 0);
return 1;
}
- lua_pushint(l, 0);
+ if(ret == -1)
+ lua_socket_call_close(ls);
+
+ if(ret < len) {
+ deregisterhandler(ls->fd, 0);
+ registerhandler(ls->fd, POLLIN | POLLOUT | POLLERR | POLLHUP, lua_socket_poll_event);
+ }
+
+ lua_pushint(l, ret);
return 1;
}
LUA_RETURN(l, LUA_FAIL);
ls = socketbyidentifier(lua_tolong(l, 1));
- if(!ls)
+ if(!ls || (ls->state == SOCKET_CLOSED))
LUA_RETURN(l, LUA_FAIL);
lua_socket_call_close(ls);
LUA_RETURN(l, LUA_OK);
}
-void lua_socket_poll_event(int fd, short events) {
+static void lua_socket_poll_event(int fd, short events) {
lua_socket *ls = socketbyfd(fd);
- if(!ls)
+ if(!ls || (ls->state == SOCKET_CLOSED))
return;
if(events & (POLLERR | POLLHUP)) {
lua_socket_call_close(ls);
return;
}
- if(events & POLLIN) {
- char buf[8192 * 2];
- int bytesread;
- bytesread = read(fd, buf, sizeof(buf));
- if((bytesread == -1) && (errno == EAGAIN))
- return;
+ switch(ls->state) {
+ case SOCKET_CONNECTING:
+ if(events & POLLOUT) {
+ deregisterhandler(fd, 0);
+ registerhandler(fd, POLLIN | POLLERR | POLLHUP, lua_socket_poll_event);
+ ls->state = SOCKET_CONNECTED;
- if(bytesread <= 0) {
- lua_socket_call_close(ls);
- return;
- }
+ lua_vnpcall(ls, "connect", "");
+ }
+ break;
+ case SOCKET_CONNECTED:
+ if(events & POLLOUT) {
+ deregisterhandler(fd, 0);
+ registerhandler(fd, POLLIN | POLLERR | POLLHUP, lua_socket_poll_event);
+
+ lua_vnpcall(ls, "flush", "");
+ }
+ if(events & POLLIN) {
+ char buf[8192 * 2];
+ int bytesread;
+
+ bytesread = read(fd, buf, sizeof(buf));
+ if((bytesread == -1) && (errno == EAGAIN))
+ return;
+
+ if(bytesread <= 0) {
+ lua_socket_call_close(ls);
+ return;
+ }
- lua_vnpcall(ls, "read", "L", buf, bytesread);
+ 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);
}
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