createauthonly: allow opers through explicitly

[solanum.git] / src / s_newconf.c

/*
 * ircd-ratbox: an advanced Internet Relay Chat Daemon(ircd).
 * s_newconf.c - code for dealing with conf stuff
 *
 * Copyright (C) 2004 Lee Hardy <lee@leeh.co.uk>
 * Copyright (C) 2004-2005 ircd-ratbox development team
 *
 * 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.
 * 3.The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
 *
 * $Id: s_newconf.c 3508 2007-06-04 16:04:49Z jilles $
 */

#include "stdinc.h"
#include "ircd_defs.h"
#include "common.h"
#include "s_conf.h"
#include "s_newconf.h"
#include "tools.h"
#include "client.h"
#include "memory.h"
#include "s_serv.h"
#include "send.h"
#include "hostmask.h"
#include "newconf.h"
#include "hash.h"
#include "balloc.h"
#include "event.h"
#include "sprintf_irc.h"
#include "irc_dictionary.h"

dlink_list shared_conf_list;
dlink_list cluster_conf_list;
dlink_list oper_conf_list;
dlink_list hubleaf_conf_list;
dlink_list server_conf_list;
dlink_list xline_conf_list;
dlink_list resv_conf_list;      /* nicks only! */
dlink_list nd_list;             /* nick delay */
dlink_list tgchange_list;

patricia_tree_t *tgchange_tree;

static BlockHeap *nd_heap = NULL;

static void expire_temp_rxlines(void *unused);
static void expire_nd_entries(void *unused);

void
init_s_newconf(void)
{
        tgchange_tree = New_Patricia(PATRICIA_BITS);
        nd_heap = BlockHeapCreate(sizeof(struct nd_entry), ND_HEAP_SIZE);
        eventAddIsh("expire_nd_entries", expire_nd_entries, NULL, 30);
        eventAddIsh("expire_temp_rxlines", expire_temp_rxlines, NULL, 60);
}

void
clear_s_newconf(void)
{
        struct server_conf *server_p;
        dlink_node *ptr;
        dlink_node *next_ptr;

        DLINK_FOREACH_SAFE(ptr, next_ptr, shared_conf_list.head)
        {
                /* ptr here is ptr->data->node */
                dlinkDelete(ptr, &shared_conf_list);
                free_remote_conf(ptr->data);
        }

        DLINK_FOREACH_SAFE(ptr, next_ptr, cluster_conf_list.head)
        {
                dlinkDelete(ptr, &cluster_conf_list);
                free_remote_conf(ptr->data);
        }

        DLINK_FOREACH_SAFE(ptr, next_ptr, hubleaf_conf_list.head)
        {
                dlinkDelete(ptr, &hubleaf_conf_list);
                free_remote_conf(ptr->data);
        }

        DLINK_FOREACH_SAFE(ptr, next_ptr, oper_conf_list.head)
        {
                free_oper_conf(ptr->data);
                dlinkDestroy(ptr, &oper_conf_list);
        }

        DLINK_FOREACH_SAFE(ptr, next_ptr, server_conf_list.head)
        {
                server_p = ptr->data;

                if(!server_p->servers)
                {
                        dlinkDelete(ptr, &server_conf_list);
                        free_server_conf(ptr->data);
                }
                else
                        server_p->flags |= SERVER_ILLEGAL;
        }
}

void
clear_s_newconf_bans(void)
{
        struct ConfItem *aconf;
        dlink_node *ptr, *next_ptr;

        DLINK_FOREACH_SAFE(ptr, next_ptr, xline_conf_list.head)
        {
                aconf = ptr->data;

                if(aconf->hold)
                        continue;

                free_conf(aconf);
                dlinkDestroy(ptr, &xline_conf_list);
        }

        DLINK_FOREACH_SAFE(ptr, next_ptr, resv_conf_list.head)
        {
                aconf = ptr->data;

                /* temporary resv */
                if(aconf->hold)
                        continue;

                free_conf(aconf);
                dlinkDestroy(ptr, &resv_conf_list);
        }

        clear_resv_hash();
}

struct remote_conf *
make_remote_conf(void)
{
        struct remote_conf *remote_p = MyMalloc(sizeof(struct remote_conf));
        return remote_p;
}

void
free_remote_conf(struct remote_conf *remote_p)
{
        s_assert(remote_p != NULL);
        if(remote_p == NULL)
                return;

        MyFree(remote_p->username);
        MyFree(remote_p->host);
        MyFree(remote_p->server);
        MyFree(remote_p);
}

int
find_shared_conf(const char *username, const char *host, 
                const char *server, int flags)
{
        struct remote_conf *shared_p;
        dlink_node *ptr;

        DLINK_FOREACH(ptr, shared_conf_list.head)
        {
                shared_p = ptr->data;

                if(match(shared_p->username, username) &&
                   match(shared_p->host, host) &&
                   match(shared_p->server, server))
                {
                        if(shared_p->flags & flags)
                                return YES;
                        else
                                return NO;
                }
        }

        return NO;
}

void
propagate_generic(struct Client *source_p, const char *command,
                const char *target, int cap, const char *format, ...)
{
        char buffer[BUFSIZE];
        va_list args;

        va_start(args, format);
        ircvsnprintf(buffer, sizeof(buffer), format, args);
        va_end(args);

        sendto_match_servs(source_p, target, cap, NOCAPS,
                        "%s %s %s",
                        command, target, buffer);
        sendto_match_servs(source_p, target, CAP_ENCAP, cap,
                        "ENCAP %s %s %s",
                        target, command, buffer);
}
                        
void
cluster_generic(struct Client *source_p, const char *command,
                int cltype, int cap, const char *format, ...)
{
        char buffer[BUFSIZE];
        struct remote_conf *shared_p;
        va_list args;
        dlink_node *ptr;

        va_start(args, format);
        ircvsnprintf(buffer, sizeof(buffer), format, args);
        va_end(args);

        DLINK_FOREACH(ptr, cluster_conf_list.head)
        {
                shared_p = ptr->data;

                if(!(shared_p->flags & cltype))
                        continue;

                sendto_match_servs(source_p, shared_p->server, cap, NOCAPS,
                                "%s %s %s",
                                command, shared_p->server, buffer);
                sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, cap,
                                "ENCAP %s %s %s",
                                shared_p->server, command, buffer);
        }
}

struct oper_conf *
make_oper_conf(void)
{
        struct oper_conf *oper_p = MyMalloc(sizeof(struct oper_conf));
        return oper_p;
}

void
free_oper_conf(struct oper_conf *oper_p)
{
        s_assert(oper_p != NULL);
        if(oper_p == NULL)
                return;

        MyFree(oper_p->username);
        MyFree(oper_p->host);
        MyFree(oper_p->name);

        if(oper_p->passwd)
        {
                memset(oper_p->passwd, 0, strlen(oper_p->passwd));
                MyFree(oper_p->passwd);
        }

#ifdef HAVE_LIBCRYPTO
        MyFree(oper_p->rsa_pubkey_file);

        if(oper_p->rsa_pubkey)
                RSA_free(oper_p->rsa_pubkey);
#endif

        MyFree(oper_p);
}

struct oper_conf *
find_oper_conf(const char *username, const char *host, const char *locip, const char *name)
{
        struct oper_conf *oper_p;
        struct irc_sockaddr_storage ip, cip;
        char addr[HOSTLEN+1];
        int bits, cbits;
        dlink_node *ptr;

        parse_netmask(locip, (struct sockaddr *)&cip, &cbits);

        DLINK_FOREACH(ptr, oper_conf_list.head)
        {
                oper_p = ptr->data;

                /* name/username doesnt match.. */
                if(irccmp(oper_p->name, name) || !match(oper_p->username, username))
                        continue;

                strlcpy(addr, oper_p->host, sizeof(addr));

                if(parse_netmask(addr, (struct sockaddr *)&ip, &bits) != HM_HOST)
                {
                        if(ip.ss_family == cip.ss_family &&
                           comp_with_mask_sock((struct sockaddr *)&ip, (struct sockaddr *)&cip, bits))
                                return oper_p;
                }

                /* we have to compare against the host as well, because its
                 * valid to set a spoof to an IP, which if we only compare
                 * in ip form to sockhost will not necessarily match --anfl
                 */
                if(match(oper_p->host, host))
                        return oper_p;
        }

        return NULL;
}

struct oper_flags
{
        int flag;
        char has;
        char hasnt;
};
static struct oper_flags oper_flagtable[] =
{
        { OPER_GLINE,           'G', 'g' },
        { OPER_KLINE,           'K', 'k' },
        { OPER_XLINE,           'X', 'x' },
        { OPER_RESV,            'Q', 'q' },
        { OPER_GLOBKILL,        'O', 'o' },
        { OPER_LOCKILL,         'C', 'c' },
        { OPER_REMOTE,          'R', 'r' },
        { OPER_UNKLINE,         'U', 'u' },
        { OPER_REHASH,          'H', 'h' },
        { OPER_DIE,             'D', 'd' },
        { OPER_ADMIN,           'A', 'a' },
        { OPER_NICKS,           'N', 'n' },
        { OPER_OPERWALL,        'L', 'l' },
        { OPER_SPY,             'S', 's' },
        { OPER_INVIS,           'P', 'p' },
        { OPER_REMOTEBAN,       'B', 'b' },
        { 0,                    '\0', '\0' }
};

const char *
get_oper_privs(int flags)
{
        static char buf[20];
        char *p;
        int i;

        p = buf;

        for(i = 0; oper_flagtable[i].flag; i++)
        {
                if(flags & oper_flagtable[i].flag)
                        *p++ = oper_flagtable[i].has;
                else
                        *p++ = oper_flagtable[i].hasnt;
        }

        *p = '\0';

        return buf;
}

struct server_conf *
make_server_conf(void)
{
        struct server_conf *server_p = MyMalloc(sizeof(struct server_conf));
        server_p->aftype = AF_INET;
        return server_p;
}

void
free_server_conf(struct server_conf *server_p)
{
        s_assert(server_p != NULL);
        if(server_p == NULL)
                return;

        if(!EmptyString(server_p->passwd))
        {
                memset(server_p->passwd, 0, strlen(server_p->passwd));
                MyFree(server_p->passwd);
        }

        if(!EmptyString(server_p->spasswd))
        {
                memset(server_p->spasswd, 0, strlen(server_p->spasswd));
                MyFree(server_p->spasswd);
        }

        MyFree(server_p->name);
        MyFree(server_p->host);
        MyFree(server_p->class_name);
        MyFree(server_p);
}

void
add_server_conf(struct server_conf *server_p)
{
        if(EmptyString(server_p->class_name))
        {
                DupString(server_p->class_name, "default");
                server_p->class = default_class;
                return;
        }

        server_p->class = find_class(server_p->class_name);

        if(server_p->class == default_class)
        {
                conf_report_error("Warning connect::class invalid for %s",
                                server_p->name);

                MyFree(server_p->class_name);
                DupString(server_p->class_name, "default");
        }

        if(strchr(server_p->host, '*') || strchr(server_p->host, '?'))
                return;
}

struct server_conf *
find_server_conf(const char *name)
{
        struct server_conf *server_p;
        dlink_node *ptr;

        DLINK_FOREACH(ptr, server_conf_list.head)
        {
                server_p = ptr->data;

                if(ServerConfIllegal(server_p))
                        continue;

                if(match(name, server_p->name))
                        return server_p;
        }

        return NULL;
}

void
attach_server_conf(struct Client *client_p, struct server_conf *server_p)
{
        /* already have an attached conf */
        if(client_p->localClient->att_sconf)
        {
                /* short circuit this special case :) */
                if(client_p->localClient->att_sconf == server_p)
                        return;

                detach_server_conf(client_p);
        }

        CurrUsers(server_p->class)++;

        client_p->localClient->att_sconf = server_p;
        server_p->servers++;
}

void
detach_server_conf(struct Client *client_p)
{
        struct server_conf *server_p = client_p->localClient->att_sconf;

        if(server_p == NULL)
                return;

        client_p->localClient->att_sconf = NULL;
        server_p->servers--;
        CurrUsers(server_p->class)--;

        if(ServerConfIllegal(server_p) && !server_p->servers)
        {
                /* the class this one is using may need destroying too */
                if(MaxUsers(server_p->class) < 0 && CurrUsers(server_p->class) <= 0)
                        free_class(server_p->class);

                dlinkDelete(&server_p->node, &server_conf_list);
                free_server_conf(server_p);
        }
}

void
set_server_conf_autoconn(struct Client *source_p, char *name, int newval)
{
        struct server_conf *server_p;

        if((server_p = find_server_conf(name)) != NULL)
        {
                if(newval)
                        server_p->flags |= SERVER_AUTOCONN;
                else
                        server_p->flags &= ~SERVER_AUTOCONN;

                sendto_realops_snomask(SNO_GENERAL, L_ALL,
                                "%s has changed AUTOCONN for %s to %i",
                                get_oper_name(source_p), name, newval);
        }
        else
                sendto_one_notice(source_p, ":Can't find %s", name);
}

struct ConfItem *
find_xline(const char *gecos, int counter)
{
        struct ConfItem *aconf;
        dlink_node *ptr;

        DLINK_FOREACH(ptr, xline_conf_list.head)
        {
                aconf = ptr->data;

                if(match_esc(aconf->name, gecos))
                {
                        if(counter)
                                aconf->port++;
                        return aconf;
                }
        }

        return NULL;
}

struct ConfItem *
find_xline_mask(const char *gecos)
{
        struct ConfItem *aconf;
        dlink_node *ptr;

        DLINK_FOREACH(ptr, xline_conf_list.head)
        {
                aconf = ptr->data;

                if(!irccmp(aconf->name, gecos))
                        return aconf;
        }

        return NULL;
}

struct ConfItem *
find_nick_resv(const char *name)
{
        struct ConfItem *aconf;
        dlink_node *ptr;

        DLINK_FOREACH(ptr, resv_conf_list.head)
        {
                aconf = ptr->data;

                if(match_esc(aconf->name, name))
                {
                        aconf->port++;
                        return aconf;
                }
        }

        return NULL;
}

struct ConfItem *
find_nick_resv_mask(const char *name)
{
        struct ConfItem *aconf;
        dlink_node *ptr;

        DLINK_FOREACH(ptr, resv_conf_list.head)
        {
                aconf = ptr->data;

                if(!irccmp(aconf->name, name))
                        return aconf;
        }

        return NULL;
}

/* clean_resv_nick()
 *
 * inputs       - nick
 * outputs      - 1 if nick is vaild resv, 0 otherwise
 * side effects -
 */
int
clean_resv_nick(const char *nick)
{
        char tmpch;
        int as = 0;
        int q = 0;
        int ch = 0;

        if(*nick == '-' || IsDigit(*nick))
                return 0;

        while ((tmpch = *nick++))
        {
                if(tmpch == '?' || tmpch == '@' || tmpch == '#')
                        q++;
                else if(tmpch == '*')
                        as++;
                else if(IsNickChar(tmpch))
                        ch++;
                else
                        return 0;
        }

        if(!ch && as)
                return 0;

        return 1;
}

/* valid_wild_card_simple()
 *
 * inputs       - "thing" to test
 * outputs      - 1 if enough wildcards, else 0
 * side effects -
 */
int
valid_wild_card_simple(const char *data)
{
        const char *p;
        char tmpch;
        int nonwild = 0;
        int wild = 0;

        /* check the string for minimum number of nonwildcard chars */
        p = data;

        while((tmpch = *p++))
        {
                /* found an escape, p points to the char after it, so skip
                 * that and move on.
                 */
                if(tmpch == '\\' && *p)
                {
                        p++;
                        if(++nonwild >= ConfigFileEntry.min_nonwildcard_simple)
                                return 1;
                }
                else if(!IsMWildChar(tmpch))
                {
                        /* if we have enough nonwildchars, return */
                        if(++nonwild >= ConfigFileEntry.min_nonwildcard_simple)
                                return 1;
                }
                else
                        wild++;
        }

        /* strings without wilds are also ok */
        return wild == 0;
}

time_t
valid_temp_time(const char *p)
{
        time_t result = 0;

        while(*p)
        {
                if(IsDigit(*p))
                {
                        result *= 10;
                        result += ((*p) & 0xF);
                        p++;
                }
                else
                        return -1;
        }

        if(result > (60 * 24 * 7 * 52))
                result = (60 * 24 * 7 * 52);

        return(result * 60);
}

static void
expire_temp_rxlines(void *unused)
{
        struct ConfItem *aconf;
        dlink_node *ptr;
        dlink_node *next_ptr;
        int i;

        HASH_WALK_SAFE(i, R_MAX, ptr, next_ptr, resvTable)
        {
                aconf = ptr->data;

                if(aconf->hold && aconf->hold <= CurrentTime)
                {
                        if(ConfigFileEntry.tkline_expire_notices)
                                sendto_realops_snomask(SNO_GENERAL, L_ALL,
                                                "Temporary RESV for [%s] expired",
                                                aconf->name);

                        free_conf(aconf);
                        dlinkDestroy(ptr, &resvTable[i]);
                }
        }
        HASH_WALK_END

        DLINK_FOREACH_SAFE(ptr, next_ptr, resv_conf_list.head)
        {
                aconf = ptr->data;

                if(aconf->hold && aconf->hold <= CurrentTime)
                {
                        if(ConfigFileEntry.tkline_expire_notices)
                                sendto_realops_snomask(SNO_GENERAL, L_ALL,
                                                "Temporary RESV for [%s] expired",
                                                aconf->name);
                        free_conf(aconf);
                        dlinkDestroy(ptr, &resv_conf_list);
                }
        }

        DLINK_FOREACH_SAFE(ptr, next_ptr, xline_conf_list.head)
        {
                aconf = ptr->data;

                if(aconf->hold && aconf->hold <= CurrentTime)
                {
                        if(ConfigFileEntry.tkline_expire_notices)
                                sendto_realops_snomask(SNO_GENERAL, L_ALL,
                                                "Temporary X-line for [%s] expired",
                                                aconf->name);
                        free_conf(aconf);
                        dlinkDestroy(ptr, &xline_conf_list);
                }
        }
}

unsigned long
get_nd_count(void)
{
        return(dlink_list_length(&nd_list));
}

void
add_nd_entry(const char *name)
{
        struct nd_entry *nd;

        if(irc_dictionary_find(nd_dict, name) != NULL)
                return;

        nd = BlockHeapAlloc(nd_heap);
        
        strlcpy(nd->name, name, sizeof(nd->name));
        nd->expire = CurrentTime + ConfigFileEntry.nick_delay;

        /* this list is ordered */
        dlinkAddTail(nd, &nd->lnode, &nd_list);

        irc_dictionary_add(nd_dict, nd->name, nd);
}

void
free_nd_entry(struct nd_entry *nd)
{
        irc_dictionary_delete(nd_dict, nd->name);

        dlinkDelete(&nd->lnode, &nd_list);
        BlockHeapFree(nd_heap, nd);
}

void
expire_nd_entries(void *unused)
{
        struct nd_entry *nd;
        dlink_node *ptr;
        dlink_node *next_ptr;

        DLINK_FOREACH_SAFE(ptr, next_ptr, nd_list.head)
        {
                nd = ptr->data;

                /* this list is ordered - we can stop when we hit the first
                 * entry that doesnt expire..
                 */
                if(nd->expire > CurrentTime)
                        return;

                free_nd_entry(nd);
        }
}

void
add_tgchange(const char *host)
{
        tgchange *target;
        patricia_node_t *pnode;

        if(find_tgchange(host))
                return;

        target = MyMalloc(sizeof(tgchange));
        pnode = make_and_lookup(tgchange_tree, host);

        pnode->data = target;
        target->pnode = pnode;

        DupString(target->ip, host);
        target->expiry = CurrentTime + (60*60*12);

        dlinkAdd(target, &target->node, &tgchange_list);
}

tgchange *
find_tgchange(const char *host)
{
        patricia_node_t *pnode;

        if((pnode = match_exact_string(tgchange_tree, host)))
                return pnode->data;

        return NULL;
}