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/************************************************************************
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* IRC - Internet Relay Chat, contrib/soft_reboot.c
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* Copyright (C) 2006 Hybrid Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 1, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id$
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*/
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#include "stdinc.h"
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#include "conf/conf.h"
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#include "channel.h"
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#include "channel_mode.h"
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#include "client.h"
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#include "hash.h"
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#include "ircd.h"
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#include "ircd_defs.h"
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#include "listener.h"
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#include "numeric.h"
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#include "packet.h"
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#include "parse.h"
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#include "restart.h"
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#include "server.h"
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#include "user.h"
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#include "send.h"
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#include "userhost.h"
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#ifdef HAVE_LIBCRYPTO
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#define CanForward(x) (!IsDefunct(x) && !(x)->localClient->fd.ssl)
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#else
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#define CanForward(x) (!IsDefunct(x))
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#endif
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static dlink_node *h_shutdown, *h_verify;
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struct SocketInfo
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{
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int fd;
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int ctrlfd;
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int namelen;
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int pwdlen;
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int caplen;
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int recvqlen;
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int sendqlen;
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int slinkqofs;
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int slinkqlen;
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time_t first;
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time_t last;
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};
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/*
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* serverize()
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*
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* Turns a dummy client into a server.
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*
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* inputs: client pointer
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* output: none
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*/
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static void
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serverize(struct Client *client_p)
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{
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struct ConnectConf *sconf = MyMalloc(sizeof(*sconf));
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char *hub_mask;
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DupString(sconf->name, client_p->name);
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sconf->flags = LINK_BURSTAWAY | LINK_TOPICBURST;
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DupString(hub_mask, "*");
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dlinkAdd(hub_mask, make_dlink_node(), &sconf->hub_list);
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client_p->serv->sconf = ref_link_by_ptr(sconf);
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SetServer(client_p);
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}
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/*
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* make_dummy()
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*
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* Prepares a dummy server-alike local client.
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*
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* inputs: file descriptor to use
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* output: client pointer
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*/
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static struct Client *
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make_dummy(int transfd)
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{
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dlink_node *m;
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struct Client *client_p = make_client(NULL);
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fd_open(&client_p->localClient->fd, transfd, 1, "Softboot");
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client_p->localClient->caps = -1;
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strcpy(client_p->name, ".");
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strcpy(client_p->id, "...");
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hash_add_client(client_p);
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hash_add_id(client_p);
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dlinkAdd(client_p, &client_p->node, &global_client_list);
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m = dlinkFind(&unknown_list, client_p);
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dlinkDelete(m, &unknown_list);
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dlinkAdd(client_p, m, &serv_list);
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dlinkAdd(client_p, make_dlink_node(), &global_serv_list);
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make_server(client_p);
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serverize(client_p);
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return client_p;
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}
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/*
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* write_dbuf()
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*
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* Writes the contents of a dbuf to the given socket.
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*
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* inputs:
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* transfd - where to write to
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* dbuf - dbuf pointer
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* output: none
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*/
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static void
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write_dbuf(int transfd, struct dbuf_queue *dbuf)
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{
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while (dbuf_length(dbuf) > 0)
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{
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struct dbuf_block *first = dbuf->blocks.head->data;
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write(transfd, first->data, first->size);
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dbuf_delete(dbuf, first->size);
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}
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}
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/*
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* introduce_socket()
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*
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* Encodes and writes socket information about the given client.
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*
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* inputs:
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* transfd - where to write to
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* client_p - local client to inform about
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* output: none
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*/
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static void
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introduce_socket(int transfd, struct Client *client_p)
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{
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struct SocketInfo si;
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const char *capabs = "";
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if (!CanForward(client_p) || client_p->localClient->fd.fd == transfd)
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return;
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if (IsServer(client_p))
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capabs = show_capabilities(client_p);
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si.fd = client_p->localClient->fd.fd;
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si.ctrlfd = client_p->localClient->ctrlfd.flags.open ?
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client_p->localClient->ctrlfd.fd : -1;
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si.namelen = strlen(client_p->name);
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si.pwdlen = EmptyString(client_p->localClient->passwd) ? 0 :
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strlen(client_p->localClient->passwd);
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si.caplen = strlen(capabs);
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si.recvqlen = dbuf_length(&client_p->localClient->buf_recvq);
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si.sendqlen = dbuf_length(&client_p->localClient->buf_sendq);
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si.slinkqofs = client_p->localClient->slinkq_ofs;
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si.slinkqlen = client_p->localClient->slinkq_len;
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si.first = client_p->firsttime;
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si.last = client_p->localClient->last;
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write(transfd, &si, sizeof(si));
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write(transfd, client_p->name, si.namelen);
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if (si.pwdlen > 0)
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write(transfd, client_p->localClient->passwd, si.pwdlen);
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if (si.caplen > 0)
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write(transfd, capabs, si.caplen);
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write_dbuf(transfd, &client_p->localClient->buf_recvq);
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write_dbuf(transfd, &client_p->localClient->buf_sendq);
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if (si.slinkqlen > 0)
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write(transfd, client_p->localClient->slinkq, si.slinkqlen);
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}
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/*
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* do_shutdown()
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*
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* Implements the /RESTART part of the soft reboot code.
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*
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* inputs:
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* msg - shutdown message
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* rboot - 1 if it's a restart, 0 if plain exit
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* output: none
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*/
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static void *
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do_shutdown(va_list args)
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{
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const char *msg = va_arg(args, const char *);
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int rboot = va_arg(args, int);
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struct Client *client_p;
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dlink_node *ptr;
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int transfd[2];
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char buf[24];
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if (!rboot || socketpair(AF_UNIX, SOCK_STREAM, 0, transfd) < 0)
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return pass_callback(h_shutdown, msg, rboot);
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if (EmptyString(msg))
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{
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ilog(L_CRIT, "Server Soft-Rebooting");
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sendto_realops_flags(UMODE_ALL, L_ALL, "Server Soft-Rebooting");
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}
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else
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{
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ilog(L_CRIT, "Server Soft-Rebooting: %s", msg);
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sendto_realops_flags(UMODE_ALL, L_ALL, "Server Soft-Rebooting: %s", msg);
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}
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//
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// Prevent all sockets which belong to registered users/servers from
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// being closed on exec().
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//
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fcntl(transfd[0], F_SETFD, 0);
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DLINK_FOREACH(ptr, local_client_list.head)
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{
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client_p = ptr->data;
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if (CanForward(client_p))
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{
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fcntl(client_p->localClient->fd.fd, F_SETFD, 0);
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if (client_p->localClient->list_task != NULL)
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sendto_one(client_p, form_str(RPL_LISTEND), me.name, client_p->name);
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}
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}
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DLINK_FOREACH(ptr, serv_list.head)
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{
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client_p = ptr->data;
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if (CanForward(client_p))
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fcntl(client_p->localClient->fd.fd, F_SETFD, 0);
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}
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close_listeners();
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unlink(ServerState.pidfile);
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//
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// Start the new ircd.
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//
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switch (fork())
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{
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case -1:
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ilog(L_CRIT, "Unable to fork(): %s", strerror(errno));
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exit(1);
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case 0:
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{
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int i;
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char **argv;
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close(transfd[1]);
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snprintf(buf, sizeof(buf), "softboot_%d", transfd[0]);
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for (i = 0; myargv[i] != NULL; i++);
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argv = MyMalloc((i + 2) * sizeof(char *));
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for (i = 0; myargv[i] != NULL; i++)
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argv[i] = myargv[i];
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argv[i++] = buf;
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argv[i] = NULL;
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execv(SPATH, argv);
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ilog(L_CRIT, "Unable to exec(): %s", strerror(errno));
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exit(1);
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}
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}
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//
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// Pass our data.
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//
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burst_all(make_dummy(transfd[1]));
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send_queued_all();
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snprintf(buf, sizeof(buf), "\001%ld\r\n", me.since);
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write(transfd[1], buf, strlen(buf));
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DLINK_FOREACH(ptr, local_client_list.head)
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introduce_socket(transfd[1], ptr->data);
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DLINK_FOREACH(ptr, serv_list.head)
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introduce_socket(transfd[1], ptr->data);
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exit(0);
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}
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/*
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* restore_socket()
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*
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* Restores socket related fields in struct LocalUser.
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*
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* inputs:
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* client_p - client pointer
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* fd - file descriptor
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* ctrlfd - servlink control fd
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* first - when the client was created
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* last - since when the client is idle
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* output: none
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*/
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static void
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restore_socket(struct Client *client_p, int fd, int ctrlfd,
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time_t first, time_t last)
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{
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char buf[HOSTLEN+16];
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struct irc_ssaddr addr;
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int family, port;
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snprintf(buf, sizeof(buf), IsClient(client_p) ? "Nick: %s" :
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(ctrlfd >= 0 ? "slink data: %s" : "Server: %s"),
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client_p->name);
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client_p->localClient = BlockHeapAlloc(lclient_heap);
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attach_class(client_p, default_class);
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fd_open(&client_p->localClient->fd, fd, 1, buf);
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fcntl(fd, F_SETFD, FD_CLOEXEC);
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if (ctrlfd >= 0)
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{
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snprintf(buf, sizeof(buf), "slink ctrl: %s", client_p->name);
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fd_open(&client_p->localClient->ctrlfd, ctrlfd, 1, buf);
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}
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addr.ss_len = sizeof(addr);
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getsockname(fd, (struct sockaddr *) &addr, &addr.ss_len);
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family = addr.ss.sin_family;
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port = ntohs(addr.ss.sin_port);
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if (!(client_p->localClient->listener = find_listener(port, &addr)))
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{
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memset(&addr.ss, 0, sizeof(addr.ss));
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addr.ss.sin_family = family;
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addr.ss.sin_port = port;
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client_p->localClient->listener = find_listener(port, &addr);
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}
|
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client_p->localClient->ip.ss_len = sizeof(client_p->localClient->ip.ss);
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getpeername(fd, (struct sockaddr *) &client_p->localClient->ip,
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&client_p->localClient->ip.ss_len);
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client_p->localClient->aftype = client_p->localClient->ip.ss.sin_family;
|
| 355 |
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irc_getnameinfo((struct sockaddr *) &client_p->localClient->ip,
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client_p->localClient->ip.ss_len, client_p->sockhost,
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sizeof(client_p->sockhost), NULL, 0, NI_NUMERICHOST);
|
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client_p->servptr = &me;
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client_p->since = client_p->lasttime = CurrentTime;
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client_p->firsttime = first;
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client_p->localClient->last = last;
|
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client_p->localClient->allow_read = MAX_FLOOD;
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comm_setflush(&client_p->localClient->fd, 1000, flood_recalc, client_p);
|
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client_p->flags |= FLAGS_FINISHED_AUTH;
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| 369 |
comm_setselect(&client_p->localClient->fd, COMM_SELECT_READ, read_packet,
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client_p, 0);
|
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}
|
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/*
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| 374 |
* restore_client()
|
| 375 |
* restore_server()
|
| 376 |
*
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| 377 |
* Restores a local user/server entity.
|
| 378 |
*
|
| 379 |
* inputs:
|
| 380 |
* client_p - client pointer
|
| 381 |
* capabs - user/server capab string
|
| 382 |
* output: none
|
| 383 |
*/
|
| 384 |
static void
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| 385 |
restore_client(struct Client *client_p, char *capabs)
|
| 386 |
{
|
| 387 |
char userbuf[USERLEN+1];
|
| 388 |
struct Class *cptr;
|
| 389 |
|
| 390 |
if (client_p->username[0] != '~')
|
| 391 |
SetGotId(client_p);
|
| 392 |
strlcpy(userbuf, client_p->username + !IsGotId(client_p),
|
| 393 |
sizeof(userbuf));
|
| 394 |
|
| 395 |
if ((cptr = execute_callback(authorize_client, client_p, userbuf)))
|
| 396 |
attach_class(client_p, cptr);
|
| 397 |
|
| 398 |
Count.local++, Count.totalrestartcount++;
|
| 399 |
if (Count.local > Count.max_loc)
|
| 400 |
Count.max_loc = Count.local;
|
| 401 |
|
| 402 |
delete_user_host(client_p->username, client_p->host, 1);
|
| 403 |
add_user_host(client_p->username, client_p->host, 0);
|
| 404 |
SetUserHost(client_p);
|
| 405 |
|
| 406 |
dlinkAdd(client_p, &client_p->localClient->lclient_node, &local_client_list);
|
| 407 |
dlinkAdd(client_p, &client_p->lnode, &me.serv->client_list);
|
| 408 |
if (IsOper(client_p))
|
| 409 |
dlinkAdd(client_p, make_dlink_node(), &oper_list);
|
| 410 |
}
|
| 411 |
|
| 412 |
static void
|
| 413 |
restore_server(struct Client *client_p, char *capabs)
|
| 414 |
{
|
| 415 |
char *p = NULL, *s = NULL;
|
| 416 |
int cap;
|
| 417 |
|
| 418 |
SetGotId(client_p);
|
| 419 |
|
| 420 |
for (s = strtoken(&p, capabs, " "); s; s = strtoken(&p, NULL, " "))
|
| 421 |
if ((cap = find_capability(s)) != 0)
|
| 422 |
SetCapable(client_p, cap);
|
| 423 |
|
| 424 |
if (check_server(client_p->name, client_p, NO) != 0)
|
| 425 |
serverize(client_p);
|
| 426 |
|
| 427 |
set_chcap_usage_counts(client_p);
|
| 428 |
Count.myserver++;
|
| 429 |
|
| 430 |
dlinkAdd(client_p, &client_p->localClient->lclient_node, &serv_list);
|
| 431 |
dlinkAdd(client_p, &client_p->lnode, &me.serv->server_list);
|
| 432 |
}
|
| 433 |
|
| 434 |
/*
|
| 435 |
* discover_from()
|
| 436 |
*
|
| 437 |
* Returns correct value of a client's from field.
|
| 438 |
*
|
| 439 |
* inputs: client pointer
|
| 440 |
* output: from
|
| 441 |
*/
|
| 442 |
static struct Client *
|
| 443 |
discover_from(struct Client *client_p)
|
| 444 |
{
|
| 445 |
return IsMe(client_p->servptr) ? client_p : discover_from(client_p->servptr);
|
| 446 |
}
|
| 447 |
|
| 448 |
/*
|
| 449 |
* restore_dbuf()
|
| 450 |
*
|
| 451 |
* Loads a dbuf contents from a file stream.
|
| 452 |
*
|
| 453 |
* inputs:
|
| 454 |
* f - file stream
|
| 455 |
* dbuf - dbuf to fill or NULL
|
| 456 |
* cnt - number of bytes to read
|
| 457 |
* output: none
|
| 458 |
*/
|
| 459 |
static void
|
| 460 |
restore_dbuf(FILE *f, struct dbuf_queue *dbuf, int cnt)
|
| 461 |
{
|
| 462 |
while (cnt > 0)
|
| 463 |
{
|
| 464 |
int nread = fread(readBuf, 1, LIBIO_MIN(sizeof(readBuf), cnt), f);
|
| 465 |
|
| 466 |
if (dbuf != NULL)
|
| 467 |
dbuf_put(dbuf, readBuf, nread);
|
| 468 |
cnt -= nread;
|
| 469 |
}
|
| 470 |
}
|
| 471 |
|
| 472 |
/*
|
| 473 |
* load_state()
|
| 474 |
*
|
| 475 |
* Loads ircd state from a socket stream.
|
| 476 |
*
|
| 477 |
* inputs: socket fd
|
| 478 |
* output: none
|
| 479 |
*/
|
| 480 |
static void
|
| 481 |
load_state(int transfd)
|
| 482 |
{
|
| 483 |
FILE *f = fdopen(transfd, "r");
|
| 484 |
char buf[IRCD_BUFSIZE+1], *p, *parv[4] = {NULL, NULL, "-o", NULL};
|
| 485 |
struct Client *client_p;
|
| 486 |
struct SocketInfo si;
|
| 487 |
dlink_node *ptr, *ptr_next;
|
| 488 |
|
| 489 |
//
|
| 490 |
// Read server burst from &me
|
| 491 |
//
|
| 492 |
fd_open(&me.localClient->fd, transfd, 1, "Softboot");
|
| 493 |
serverize(&me);
|
| 494 |
|
| 495 |
while (fgets(buf, sizeof(buf), f))
|
| 496 |
{
|
| 497 |
if ((p = strpbrk(buf, "\r\n")) != NULL)
|
| 498 |
*p = 0;
|
| 499 |
if (buf[0] == '\001')
|
| 500 |
{
|
| 501 |
me.since = atoi(buf + 1);
|
| 502 |
break;
|
| 503 |
}
|
| 504 |
parse(&me, buf, buf + strlen(buf));
|
| 505 |
}
|
| 506 |
|
| 507 |
SetMe(&me);
|
| 508 |
unref_link(me.serv->sconf);
|
| 509 |
me.serv->sconf = NULL;
|
| 510 |
|
| 511 |
fd_close(&me.localClient->fd);
|
| 512 |
|
| 513 |
//
|
| 514 |
// Read local client information
|
| 515 |
//
|
| 516 |
while (fread(&si, sizeof(si), 1, f) == 1)
|
| 517 |
{
|
| 518 |
if (si.fd == -1)
|
| 519 |
break;
|
| 520 |
|
| 521 |
assert(si.namelen < IRCD_BUFSIZE);
|
| 522 |
assert(si.caplen < IRCD_BUFSIZE);
|
| 523 |
|
| 524 |
fread(buf, 1, si.namelen, f);
|
| 525 |
buf[si.namelen] = 0;
|
| 526 |
|
| 527 |
if ((client_p = find_client(buf)) != NULL)
|
| 528 |
restore_socket(client_p, si.fd, si.ctrlfd, si.first, si.last);
|
| 529 |
else
|
| 530 |
close(si.fd);
|
| 531 |
|
| 532 |
fread(buf, 1, si.pwdlen, f);
|
| 533 |
if (client_p != NULL && si.pwdlen > 0)
|
| 534 |
{
|
| 535 |
buf[si.pwdlen] = 0;
|
| 536 |
DupString(client_p->localClient->passwd, buf);
|
| 537 |
}
|
| 538 |
|
| 539 |
fread(buf, 1, si.caplen, f);
|
| 540 |
buf[si.caplen] = 0;
|
| 541 |
|
| 542 |
if (client_p != NULL)
|
| 543 |
(IsServer(client_p) ? restore_server : restore_client) (client_p, buf);
|
| 544 |
|
| 545 |
restore_dbuf(f, client_p ? &client_p->localClient->buf_recvq : NULL,
|
| 546 |
si.recvqlen);
|
| 547 |
restore_dbuf(f, client_p ? &client_p->localClient->buf_sendq : NULL,
|
| 548 |
si.sendqlen);
|
| 549 |
|
| 550 |
if (si.slinkqlen > 0)
|
| 551 |
{
|
| 552 |
client_p->localClient->slinkq = MyMalloc(si.slinkqlen);
|
| 553 |
fread(client_p->localClient->slinkq, 1, si.slinkqlen, f);
|
| 554 |
client_p->localClient->slinkq_ofs = si.slinkqofs;
|
| 555 |
client_p->localClient->slinkq_len = si.slinkqlen;
|
| 556 |
}
|
| 557 |
}
|
| 558 |
|
| 559 |
//
|
| 560 |
// Finalization
|
| 561 |
//
|
| 562 |
DLINK_FOREACH_SAFE(ptr, ptr_next, global_client_list.head)
|
| 563 |
{
|
| 564 |
client_p = ptr->data;
|
| 565 |
client_p->from = discover_from(client_p);
|
| 566 |
if (client_p->from == client_p && !client_p->localClient)
|
| 567 |
{
|
| 568 |
SetDead(client_p);
|
| 569 |
client_p->localClient = BlockHeapAlloc(lclient_heap);
|
| 570 |
exit_client(client_p, &me, "Soft reboot");
|
| 571 |
}
|
| 572 |
}
|
| 573 |
|
| 574 |
while (oper_list.head != NULL)
|
| 575 |
{
|
| 576 |
client_p = oper_list.head->data;
|
| 577 |
parv[0] = parv[1] = client_p->name;
|
| 578 |
set_user_mode(client_p, client_p, 4, parv);
|
| 579 |
}
|
| 580 |
|
| 581 |
fclose(f);
|
| 582 |
send_queued_all();
|
| 583 |
}
|
| 584 |
|
| 585 |
/*
|
| 586 |
* do_verify_conf()
|
| 587 |
*
|
| 588 |
* Handles the conf verification callback.
|
| 589 |
*
|
| 590 |
* inputs: none
|
| 591 |
* output: none
|
| 592 |
*/
|
| 593 |
static void *
|
| 594 |
do_verify_conf(va_list args)
|
| 595 |
{
|
| 596 |
pass_callback(h_verify);
|
| 597 |
|
| 598 |
if (conf_cold)
|
| 599 |
{
|
| 600 |
int i;
|
| 601 |
|
| 602 |
for (i = 0; myargv[i] != NULL; i++)
|
| 603 |
if (!ircncmp(myargv[i], "softboot_", 9))
|
| 604 |
{
|
| 605 |
load_state(atoi(myargv[i] + 9));
|
| 606 |
myargv[i] = NULL;
|
| 607 |
}
|
| 608 |
}
|
| 609 |
|
| 610 |
return NULL;
|
| 611 |
}
|
| 612 |
|
| 613 |
INIT_MODULE(soft_reboot, "$Revision$")
|
| 614 |
{
|
| 615 |
h_shutdown = install_hook(ircd_shutdown, do_shutdown);
|
| 616 |
h_verify = install_hook(verify_conf, do_verify_conf);
|
| 617 |
}
|
| 618 |
|
| 619 |
CLEANUP_MODULE
|
| 620 |
{
|
| 621 |
uninstall_hook(verify_conf, do_verify_conf);
|
| 622 |
uninstall_hook(ircd_shutdown, do_shutdown);
|
| 623 |
}
|
Parent Directory
| 
Revision Log