+/*
+ * Dolda Connect - Modular multiuser Direct Connect-style client
+ * Copyright (C) 2004 Fredrik Tolf (fredrik@dolda2000.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+#include <stdlib.h>
+#include <stdio.h>
+#include <wchar.h>
+#include <malloc.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <alloca.h>
+#include <wctype.h>
+#include <time.h>
+#include <errno.h>
+#include <bzlib.h>
+#include <zlib.h>
+#include <sys/stat.h>
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "filenet.h"
+#include "log.h"
+#include "module.h"
+#include "utils.h"
+#include "client.h"
+#include "transfer.h"
+#include "sysevents.h"
+#include "net.h"
+
+/*
+ * The Direct Connect protocol is extremely ugly. Thus, this code must
+ * also be a bit ugly in certain places. Please forgive me. =/
+ *
+ * This also means that there might be some pieces of the code that
+ * look completely illogical to you, and you think that you may make
+ * them much neater/better. However, in many cases it might just be
+ * that it's required to cope with some oddity of the protocol, such
+ * as the amazingly ugly delayed key response in the peer protocol.
+ */
+
+/* I assume this is the correct character set to use for DC,
+ * considering it was developed without i18n support under Windows */
+#define DCCHARSET "windows-1252"
+
+#ifdef DCPP_MASQUERADE
+/*
+ * I honestly don't want to pretend being a client that I'm not, but
+ * there are so many hubs that simply do not accept any clients
+ * outside their whitelists, for no obvious reasons, so I feel that I
+ * am left with little choice. Anyhow, as long as I actually support
+ * all the features that my faked DC++ version does, there should be
+ * very little harm done.
+ */
+#define DCIDTAG "++"
+#define DCIDTAGV "0.674"
+#define DCIDFULL "DC++ 0.674"
+#else
+#define DCIDTAG "Dolda"
+#define DCIDTAGV VERSION
+#define DCIDFULL "DoldaConnect " VERSION
+#endif
+
+#define PEER_CMD 0
+#define PEER_TRNS 1
+#define PEER_SYNC 2
+
+#define CPRS_NONE 0
+#define CPRS_ZLIB 1
+
+struct command
+{
+ char *name;
+ void (*handler)(struct socket *sk, void *data, char *cmd, char *args);
+};
+
+struct qcommand
+{
+ struct qcommand *next;
+ char *string;
+};
+
+struct dchub
+{
+ char *inbuf;
+ size_t inbufdata, inbufsize;
+ struct qcommand *queue;
+ int extended;
+ char *nativename;
+ char *nativenick;
+};
+
+struct dcexppeer
+{
+ struct dcexppeer *next, *prev;
+ char *nick;
+ struct fnetnode *fn;
+ struct timer *expire;
+};
+
+struct dcpeer
+{
+ struct dcpeer *next, *prev;
+ struct socket *sk;
+ struct fnetnode *fn;
+ char *inbuf;
+ size_t inbufdata, inbufsize;
+ int freeing;
+ struct qcommand *queue;
+ struct transfer *transfer;
+ int state;
+ int ptclose; /* Close after transfer is complete */
+ int accepted; /* If false, we connected, otherwise, we accepted */
+ int extended;
+ int direction; /* Using the constants from transfer.h */
+ int compress;
+ void *cprsdata;
+ char *mbspath;
+ char *key;
+ char *nativename;
+ char **supports;
+ wchar_t *wcsname;
+};
+
+static struct fnet dcnet;
+static struct transferiface dctransfer;
+static struct socket *udpsock = NULL;
+static struct socket *tcpsock = NULL;
+static struct dcpeer *peers = NULL;
+int numdcpeers = 0;
+static struct dcexppeer *expected = NULL;
+static char *hmlistname = NULL;
+static char *xmllistname = NULL;
+static char *xmlbz2listname = NULL;
+
+static void peerconnect(struct socket *sk, int err, struct fnetnode *fn);
+static void freedcpeer(struct dcpeer *peer);
+static void transread(struct socket *sk, struct dcpeer *peer);
+static void transerr(struct socket *sk, int err, struct dcpeer *peer);
+static void transwrite(struct socket *sk, struct dcpeer *peer);
+static void updatehmlist(void);
+static void updatexmllist(void);
+static void updatexmlbz2list(void);
+
+static int reservedchar(unsigned char c)
+{
+ return((c == 0) || (c == 5) || (c == 124) || (c == 96) || (c == 126) || (c == 36));
+}
+
+/* Oh, how I despise having to do this... */
+static char *dcmakekey(char *lock)
+{
+ int i, len, offset;
+ char *buf, *key;
+ char save;
+
+ buf = smalloc(strlen(lock));
+ save = 5;
+ len = 0;
+ for(i = 0; lock[i]; i++)
+ {
+ buf[i] = lock[i] ^ save;
+ buf[i] = ((buf[i] & 0x0F) << 4) | ((buf[i] & 0xF0) >> 4);
+ save = lock[i];
+ if((i != 0) && reservedchar(buf[i]))
+ len += 10;
+ else
+ len++;
+ }
+ buf[0] ^= buf[i - 1];
+ if(reservedchar(buf[0]))
+ len += 10;
+ else
+ len++;
+ key = smalloc(len + 1);
+ offset = 0;
+ for(i = 0; lock[i] != 0; i++)
+ {
+ if(reservedchar(buf[i]))
+ offset += sprintf(key + offset, "/%%DCN%03i%%/", buf[i]);
+ else
+ key[offset++] = buf[i];
+ }
+ key[offset] = 0;
+ free(buf);
+ return(key);
+}
+
+static void endcompress(struct dcpeer *peer)
+{
+ if(peer->compress == CPRS_ZLIB)
+ {
+ deflateEnd(peer->cprsdata);
+ free(peer->cprsdata);
+ }
+ peer->compress = CPRS_NONE;
+}
+
+static void initcompress(struct dcpeer *peer, int algo)
+{
+ int ret;
+
+ endcompress(peer);
+ peer->compress = algo;
+ if(algo == CPRS_ZLIB)
+ {
+ peer->cprsdata = smalloc(sizeof(z_stream));
+ memset(peer->cprsdata, 0, sizeof(z_stream));
+ if((ret = deflateInit(peer->cprsdata, 3)) != Z_OK)
+ {
+ flog(LOG_CRIT, "Aiya! zlib refuses to init (%i)!", ret);
+ abort();
+ }
+ }
+}
+
+static void unquote(wchar_t *in)
+{
+ wchar_t *p, *p2, nc;
+
+ for(p = in; *p != L'\0'; p++)
+ {
+ if(*p == L'&')
+ {
+ for(p2 = p + 1; (*p2 != L'\0') && (*p2 != L';') && (*p2 != L'&'); p2++);
+ if(*p2 == L'&')
+ continue;
+ if(*p2 == L'\0')
+ return;
+ *p2 = L'\0';
+ nc = L'\0';
+ if(!wcscmp(p + 1, L"amp"))
+ {
+ nc = L'&';
+ } else if(p[1] == L'#') {
+ nc = ucptowc(wcstol(p + 2, NULL, 10));
+ }
+ if(nc == L'\0')
+ {
+ *p2 = L';';
+ p = p2;
+ continue;
+ }
+ *p = nc;
+ memmove(p + 1, p2 + 1, (wcslen(p2 + 1) + 1) * sizeof(wchar_t));
+ }
+ }
+}
+
+static void freeexppeer(struct dcexppeer *ep)
+{
+ if(ep->next != NULL)
+ ep->next->prev = ep->prev;
+ if(ep->prev != NULL)
+ ep->prev->next = ep->next;
+ if(ep == expected)
+ expected = ep->next;
+ free(ep->nick);
+ putfnetnode(ep->fn);
+ if(ep->expire != NULL)
+ canceltimer(ep->expire);
+ free(ep);
+}
+
+static void exppeerexpire(int cancelled, struct dcexppeer *ep)
+{
+ ep->expire = NULL;
+ if(!cancelled)
+ freeexppeer(ep);
+}
+
+static struct dcexppeer *expectpeer(char *nick, struct fnetnode *fn)
+{
+ struct dcexppeer *ep;
+
+ ep = smalloc(sizeof(*ep));
+ ep->nick = sstrdup(nick);
+ getfnetnode(ep->fn = fn);
+ ep->expire = timercallback(ntime() + 300, (void (*)(int, void *))exppeerexpire, ep);
+ ep->next = expected;
+ ep->prev = NULL;
+ if(expected != NULL)
+ expected->prev = ep;
+ expected = ep;
+ return(ep);
+}
+
+static struct qcommand *newqcmd(struct qcommand **queue, char *string)
+{
+ struct qcommand *new;
+
+ while(*queue != NULL)
+ queue = &(*queue)->next;
+ new = smalloc(sizeof(*new));
+ new->string = sstrdup(string);
+ new->next = *queue;
+ *queue = new;
+ return(new);
+}
+
+static struct qcommand *ulqcmd(struct qcommand **queue)
+{
+ struct qcommand *qcmd;
+
+ if((qcmd = *queue) == NULL)
+ return(NULL);
+ *queue = qcmd->next;
+ return(qcmd);
+}
+
+static void freeqcmd(struct qcommand *qcmd)
+{
+ free(qcmd->string);
+ free(qcmd);
+}
+
+static void hubrecvchat(struct socket *sk, struct fnetnode *fn, char *from, char *string)
+{
+ wchar_t *chat, *wfrom, *wpeer;
+ char *p, *end;
+ struct fnetpeer *peer;
+
+ end = string + strlen(string);
+ while((p = strchr(string, 13)) != NULL)
+ memmove(p, p + 1, (end-- - p));
+ if(from != NULL)
+ {
+ if((strlen(string) > strlen(from) + 2) && (*string == '<') && !memcmp(string + 1, from, strlen(from)) && (*(string + strlen(from) + 1) == '>'))
+ string += strlen(from) + 2;
+ if((wfrom = icmbstowcs(from, DCCHARSET)) == NULL)
+ return;
+ wpeer = swcsdup(wfrom);
+ } else {
+ wfrom = NULL;
+ wpeer = NULL;
+ if(*string == '<')
+ {
+ for(p = string + 1; *p; p++)
+ {
+ if((*p == ' ') || (*p == '>'))
+ break;
+ }
+ if(*p == '>')
+ {
+ *(p++) = 0;
+ if(*p == ' ')
+ p++;
+ if((wpeer = icmbstowcs(string + 1, DCCHARSET)) == NULL)
+ return;
+ string = p;
+ }
+ }
+ if(wpeer == NULL)
+ wpeer = swcsdup(L"");
+ }
+ if((chat = icmbstowcs(string, DCCHARSET)) == NULL)
+ {
+ if(wfrom != NULL)
+ free(wfrom);
+ free(wpeer);
+ return;
+ }
+ unquote(chat);
+ if(wfrom != NULL)
+ {
+ if((peer = fnetfindpeer(fn, wfrom)) == NULL) /* Assume public chat */
+ fnethandlechat(fn, 1, wfrom, wpeer, chat);
+ else
+ fnethandlechat(fn, 0, wfrom, wpeer, chat);
+ } else {
+ fnethandlechat(fn, 1, L"", wpeer, chat);
+ }
+ if(wfrom != NULL)
+ free(wfrom);
+ free(wpeer);
+ free(chat);
+}
+
+static void sendadc(struct socket *sk, char *arg)
+{
+ char *buf;
+ size_t bufsize, bufdata;
+
+ buf = NULL;
+ bufsize = bufdata = 0;
+ addtobuf(buf, ' ');
+ for(; *arg; arg++)
+ {
+ if(*arg == ' ')
+ {
+ bufcat(buf, "\\s", 2);
+ } else if(*arg == '\n') {
+ bufcat(buf, "\\n", 2);
+ } else if(*arg == '\\') {
+ bufcat(buf, "\\\\", 2);
+ } else {
+ addtobuf(buf, *arg);
+ }
+ }
+ sockqueue(sk, buf, bufdata);
+ free(buf);
+}
+
+static void sendadcf(struct socket *sk, char *arg, ...)
+{
+ char *buf;
+ va_list args;
+
+ va_start(args, arg);
+ buf = vsprintf2(arg, args);
+ va_end(args);
+ if(buf == NULL)
+ return;
+ sendadc(sk, buf);
+ free(buf);
+}
+
+static char **parseadc(char *args)
+{
+ char **retbuf;
+ size_t retbufsize, retbufdata;
+ char *buf;
+ size_t bufsize, bufdata;
+ int state;
+
+ retbuf = NULL;
+ buf = NULL;
+ retbufsize = retbufdata = bufsize = bufdata = 0;
+ state = 0;
+ while(state != 3)
+ {
+ switch(state)
+ {
+ case 0:
+ if(*args == 0)
+ state = 3;
+ else if(*args != ' ')
+ state = 1;
+ break;
+ case 1:
+ if((*args == ' ') || (*args == 0))
+ {
+ addtobuf(buf, 0);
+ addtobuf(retbuf, buf);
+ buf = NULL;
+ bufsize = bufdata = 0;
+ if(*args == 0)
+ state = 3;
+ } else if(*args == '\\') {
+ state = 2;
+ } else {
+ addtobuf(buf, *args);
+ }
+ args++;
+ break;
+ case 2:
+ if(*args == 0)
+ {
+ if(buf != NULL)
+ free(buf);
+ addtobuf(retbuf, NULL);
+ freeparr(retbuf);
+ return(NULL);
+ } else if(*args == 's') {
+ addtobuf(buf, ' ');
+ } else if(*args == 'n') {
+ addtobuf(buf, '\n');
+ } else if(*args == '\\') {
+ addtobuf(buf, '\\');
+ }
+ state = 1;
+ }
+ }
+ if(buf != NULL)
+ free(buf);
+ addtobuf(retbuf, NULL);
+ return(retbuf);
+}
+
+/* Macros useful in command handlers */
+#define skipspace(s) ({if(((s) = strchr((s), ' ')) == NULL) return; else (s)++;})
+#define qstr(sk, str) sockqueue(sk, str, strlen(str))
+#define qstrf(sk, strandargs...) \
+do { \
+ char *__buf__; \
+ if((__buf__ = sprintf2(strandargs)) != NULL) { \
+ sockqueue(sk, __buf__, strlen(__buf__)); \
+ free(__buf__); \
+ } \
+} while(0)
+
+static char *tr(char *str, char *trans)
+{
+ char *p;
+
+ for(; *trans; trans += 2)
+ {
+ for(p = strchr(str, trans[0]); p != NULL; p = strchr(p, trans[0]))
+ *p = trans[1];
+ }
+ return(str);
+}
+
+static int trresumecb(struct transfer *transfer, wchar_t *cmd, wchar_t *arg, struct dcpeer *peer)
+{
+ if(!wcscmp(cmd, L"resume"))
+ {
+ if(arg == NULL)
+ {
+ flog(LOG_WARNING, "filter returned no position for \"resume\" on transfer %i", transfer->id);
+ freedcpeer(peer);
+ } else {
+ transfer->curpos = wcstol(arg, NULL, 10);
+ qstrf(peer->sk, "$Get %s$%i|", peer->mbspath, transfer->curpos + 1);
+ }
+ free(peer->mbspath);
+ peer->mbspath = NULL;
+ return(1);
+ }
+ return(0);
+}
+
+static void peerhandleaction(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
+{
+ struct dchub *hub;
+ struct dcexppeer *expect;
+ struct transfer *transfer;
+ wchar_t tbuf[128];
+ char *mbsbuf;
+
+ hub = NULL;
+ if(peer->fn != NULL)
+ {
+ if(peer->fn->fnet != &dcnet)
+ {
+ peer->sk->close = 1;
+ return;
+ }
+ hub = peer->fn->data;
+ }
+ if(peer->transfer != NULL)
+ {
+ swprintf(tbuf, 128, L"hs: dc-%s", cmd);
+ transfersetactivity(peer->transfer, tbuf);
+ }
+ if(peer->accepted)
+ {
+ if(cmd == NULL) /* Connect event */
+ {
+ } else if(!strcmp(cmd, "$MyNick")) {
+ for(expect = expected; expect != NULL; expect = expect->next)
+ {
+ if(!strcmp(expect->nick, args))
+ break;
+ }
+ if(expect == NULL)
+ {
+ peer->fn = NULL;
+ } else {
+ peer->fn = expect->fn;
+ getfnetnode(peer->fn);
+ freeexppeer(expect);
+ }
+ } else if(!strcmp(cmd, "$Lock")) {
+ if(peer->wcsname == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ if(hub == NULL)
+ qstrf(sk, "$MyNick %s|", icswcstombs(confgetstr("cli", "defnick"), DCCHARSET, "DoldaConnectUser-IN"));
+ else
+ qstrf(sk, "$MyNick %s|", hub->nativenick);
+#ifdef DCPP_MASQUERADE
+ qstrf(sk, "$Lock EXTENDEDPROTOCOLABCABCABCABCABCABC Pk=DCPLUSPLUS0.674ABCABC|");
+#else
+ qstrf(sk, "$Lock EXTENDEDPROTOCOLABCABCABCABCABCABC Pk=DOLDA%sABCABCABC|", VERSION);
+#endif
+ if(peer->extended)
+ {
+#ifdef DCPP_MASQUERADE
+ qstr(sk, "$Supports MiniSlots XmlBZList ADCGet TTHL TTHF GetZBlock ZLIG |");
+#else
+ qstr(sk, "$Supports MiniSlots XmlBZList ADCGet TTHL TTHF GetZBlock ZLIG|");
+#endif
+ }
+ for(transfer = transfers; transfer != NULL; transfer = transfer->next)
+ {
+ if((transfer->dir == TRNSD_DOWN) && (transfer->iface == NULL) && !wcscmp(peer->wcsname, transfer->peerid))
+ break;
+ }
+ if(transfer == NULL)
+ {
+ peer->direction = TRNSD_UP;
+ transfer = newupload(peer->fn, &dcnet, peer->wcsname, &dctransfer, peer);
+ transfersetnick(transfer, peer->wcsname);
+ peer->transfer = transfer;
+ } else {
+ peer->direction = TRNSD_DOWN;
+ peer->transfer = transfer;
+ transferattach(transfer, &dctransfer, peer);
+ transfersetnick(transfer, peer->wcsname);
+ transfersetstate(transfer, TRNS_HS);
+ }
+ qstrf(sk, "$Direction %s %i|", (peer->direction == TRNSD_UP)?"Upload":"Download", rand() % 10000);
+ if(peer->key != NULL)
+ {
+ /* I hate the DC protocol so much... */
+ qstrf(sk, "$Key %s|", peer->key);
+ free(peer->key);
+ peer->key = NULL;
+ }
+ if(peer->direction == TRNSD_DOWN)
+ {
+ if((mbsbuf = icwcstombs(peer->transfer->path, DCCHARSET)) == NULL)
+ {
+ /* I believe that NOTFOUND should be used
+ * since giving a path that cannot be
+ * represented in the protocol's charset is
+ * literally the same as giving a path that
+ * the client doesn't have. */
+ transferseterror(peer->transfer, TRNSE_NOTFOUND);
+ freedcpeer(peer);
+ return;
+ }
+ if(peer->transfer->size == -1)
+ {
+ /* The transfer will be restarted later from
+ * cmd_filelength when it detects that the sizes
+ * don't match. */
+ qstrf(sk, "$Get %s$1|", mbsbuf);
+ } else {
+ if(forkfilter(transfer))
+ {
+ flog(LOG_WARNING, "could not fork filter for transfer %i: %s", transfer->id, strerror(errno));
+ freedcpeer(peer);
+ free(mbsbuf);
+ return;
+ }
+ peer->mbspath = sstrdup(mbsbuf);
+ CBREG(transfer, trans_filterout, (int (*)(struct transfer *, wchar_t *, wchar_t *, void *))trresumecb, NULL, peer);
+ }
+ free(mbsbuf);
+ }
+ } else if(!strcmp(cmd, "$FileLength")) {
+ if(peer->transfer == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ transfersetstate(peer->transfer, TRNS_MAIN);
+ socksettos(peer->sk, confgetint("transfer", "dltos"));
+ peer->state = PEER_TRNS;
+ peer->sk->readcb = (void (*)(struct socket *, void *))transread;
+ peer->sk->errcb = (void (*)(struct socket *, int, void *))transerr;
+ qstr(peer->sk, "$Send|");
+ }
+ } else {
+ if(cmd == NULL) /* Connect event */
+ {
+ if(hub == NULL)
+ qstrf(sk, "$MyNick %s|", icswcstombs(confgetstr("cli", "defnick"), DCCHARSET, "DoldaConnectUser-IN"));
+ else
+ qstrf(sk, "$MyNick %s|", hub->nativenick);
+#ifdef DCPP_MASQUERADE
+ qstrf(sk, "$Lock EXTENDEDPROTOCOLABCABCABCABCABCABC Pk=DCPLUSPLUS0.674ABCABC|");
+#else
+ qstrf(sk, "$Lock EXTENDEDPROTOCOLABCABCABCABCABCABC Pk=DOLDA%sABCABCABC|", VERSION);
+#endif
+ } else if(!strcmp(cmd, "$Direction")) {
+ if(peer->wcsname == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ if(peer->direction == TRNSD_UP)
+ {
+ transfer = newupload(peer->fn, &dcnet, peer->wcsname, &dctransfer, peer);
+ transfersetnick(transfer, peer->wcsname);
+ peer->transfer = transfer;
+ } else {
+ for(transfer = transfers; transfer != NULL; transfer = transfer->next)
+ {
+ if((transfer->dir == TRNSD_DOWN) && (transfer->state == TRNS_WAITING) && !wcscmp(peer->wcsname, transfer->peerid))
+ break;
+ }
+ if(transfer == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ peer->transfer = transfer;
+ transferattach(transfer, &dctransfer, peer);
+ transfersetnick(transfer, peer->wcsname);
+ transfersetstate(transfer, TRNS_HS);
+ }
+ if(peer->extended)
+ {
+#ifdef DCPP_MASQUERADE
+ qstr(sk, "$Supports MiniSlots XmlBZList ADCGet TTHL TTHF GetZBlock ZLIG |");
+#else
+ qstr(sk, "$Supports MiniSlots XmlBZList ADCGet TTHL TTHF GetZBlock ZLIG|");
+#endif
+ }
+ qstrf(sk, "$Direction %s %i|", (peer->direction == TRNSD_UP)?"Upload":"Download", rand() % 10000);
+ if(peer->key != NULL)
+ qstrf(sk, "$Key %s|", peer->key);
+ if(peer->direction == TRNSD_DOWN)
+ {
+ if((mbsbuf = icwcstombs(peer->transfer->path, DCCHARSET)) == NULL)
+ {
+ /* I believe that NOTFOUND should be used
+ * since giving a path that cannot be
+ * represented in the protocol's charset is
+ * literally the same as giving a path that
+ * the client doesn't have. */
+ transferseterror(peer->transfer, TRNSE_NOTFOUND);
+ freedcpeer(peer);
+ return;
+ }
+ if(peer->transfer->size == -1)
+ {
+ /* The transfer will be restarted later from
+ * cmd_filelength when it detects that the sizes
+ * don't match. */
+ qstrf(sk, "$Get %s$1|", mbsbuf);
+ } else {
+ if(forkfilter(transfer))
+ {
+ flog(LOG_WARNING, "could not fork filter for transfer %i: %s", transfer->id, strerror(errno));
+ freedcpeer(peer);
+ free(mbsbuf);
+ return;
+ }
+ peer->mbspath = sstrdup(mbsbuf);
+ CBREG(transfer, trans_filterout, (int (*)(struct transfer *, wchar_t *, wchar_t *, void *))trresumecb, NULL, peer);
+ }
+ free(mbsbuf);
+ }
+ } else if(!strcmp(cmd, "$FileLength")) {
+ if(peer->transfer == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ transfersetstate(peer->transfer, TRNS_MAIN);
+ socksettos(peer->sk, confgetint("transfer", "dltos"));
+ peer->state = PEER_TRNS;
+ peer->sk->readcb = (void (*)(struct socket *, void *))transread;
+ peer->sk->errcb = (void (*)(struct socket *, int, void *))transerr;
+ qstr(peer->sk, "$Send|");
+ }
+ }
+}
+
+static void sendmyinfo(struct socket *sk, struct fnetnode *fn)
+{
+ struct dchub *hub;
+ char *buf;
+ struct fnetnode *cfn;
+ int numhubs;
+
+ hub = fn->data;
+ qstrf(sk, "$MyINFO $ALL %s ", hub->nativenick);
+ buf = tr(icswcstombs(confgetstr("dc", "desc"), DCCHARSET, "Charset_conv_failure"), "$_|_");
+ qstrf(sk, "%s", buf);
+ numhubs = 0;
+ for(cfn = fnetnodes; cfn != NULL; cfn = cfn->next)
+ {
+ if((cfn->state == FNN_EST) || (cfn->state == FNN_HS))
+ numhubs++;
+ }
+ qstrf(sk, "<%s V:%s,M:%c,H:%i/0/0,S:%i>",
+ DCIDTAG,
+ DCIDTAGV,
+ (tcpsock == NULL)?'P':'A',
+ numhubs,
+ confgetint("transfer", "slots")
+ );
+ qstrf(sk, "$ $");
+ buf = tr(icswcstombs(confgetstr("dc", "speedstring"), DCCHARSET, "Charset_conv_failure"), "$_|_");
+ qstrf(sk, "%s\x01$", buf);
+ buf = tr(icswcstombs(confgetstr("dc", "email"), DCCHARSET, "Charset_conv_failure"), "$_|_");
+ qstrf(sk, "%s$", buf);
+ qstrf(sk, "%llu$|", sharesize);
+}
+
+static void hubhandleaction(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ struct dchub *hub;
+
+ hub = fn->data;
+ if(!strcmp(cmd, "$Lock"))
+ {
+ qstrf(sk, "$ValidateNick %s|", hub->nativenick);
+ } else if(!strcmp(cmd, "$Hello")) {
+ if(fn->state == FNN_HS)
+ {
+ qstrf(sk, "$Version 1,0091|");
+ qstrf(sk, "$GetNickList|");
+ sendmyinfo(sk, fn);
+ fnetsetstate(fn, FNN_EST);
+ } else {
+ qstrf(sk, "$GetINFO %s %s|", args, hub->nativenick);
+ }
+ }
+}
+
+static void cmd_lock(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ struct dchub *hub;
+ char *key;
+ char *p;
+
+ hub = fn->data;
+ if(!strncmp(args, "EXTENDEDPROTOCOL", 16))
+ hub->extended = 1;
+ if((p = strchr(args, ' ')) != NULL)
+ *(p++) = 0;
+ if(hub->extended)
+ {
+#ifdef DCPP_MASQUERADE
+ qstrf(sk, "$Supports UserCommand NoGetINFO NoHello UserIP2 TTHSearch GetZBlock |");
+#else
+ qstrf(sk, "$Supports UserCommand NoGetINFO NoHello UserIP2 TTHSearch GetZBlock|");
+#endif
+ }
+ key = dcmakekey(args);
+ qstrf(sk, "$Key %s|", key);
+ free(key);
+ hubhandleaction(sk, fn, cmd, args);
+}
+
+static void cmd_hubname(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ wchar_t *buf;
+ struct dchub *hub;
+
+ hub = fn->data;
+ if(hub->nativename == NULL)
+ free(hub->nativename);
+ hub->nativename = sstrdup(args);
+ buf = icmbstowcs(args, DCCHARSET);
+ fnetsetname(fn, (buf == NULL)?L"Hubname conv error":buf);
+ if(buf != NULL)
+ free(buf);
+ hubhandleaction(sk, fn, cmd, args);
+}
+
+static void cmd_hello(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ wchar_t *nick;
+ struct dchub *hub;
+
+ hub = fn->data;
+ if((nick = icmbstowcs(args, DCCHARSET)) == NULL)
+ return;
+ if(strcmp(args, hub->nativenick) && (fnetfindpeer(fn, nick) == NULL))
+ fnetaddpeer(fn, nick, nick);
+ free(nick);
+ hubhandleaction(sk, fn, cmd, args);
+}
+
+static void cmd_quit(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ wchar_t *nick;
+ struct fnetpeer *peer;
+ struct dchub *hub;
+
+ hub = fn->data;
+ if((nick = icmbstowcs(args, DCCHARSET)) == NULL)
+ return;
+ if((peer = fnetfindpeer(fn, nick)) != NULL)
+ fnetdelpeer(peer);
+ free(nick);
+ hubhandleaction(sk, fn, cmd, args);
+}
+
+static void cmd_nicklist(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ struct dchub *hub;
+ char *p;
+ wchar_t *buf;
+ struct fnetpeer *peer, *npeer;
+
+ hub = fn->data;
+ for(peer = fn->peers; peer != NULL; peer = peer->next)
+ peer->flags.b.delete = 1;
+ while((p = strstr(args, "$$")) != NULL)
+ {
+ *p = 0;
+ if((buf = icmbstowcs(args, DCCHARSET)) != NULL)
+ {
+ if((peer = fnetfindpeer(fn, buf)) == NULL)
+ peer = fnetaddpeer(fn, buf, buf);
+ else
+ peer->flags.b.delete = 0;
+ free(buf);
+ qstrf(sk, "$GetINFO %s %s|", args, hub->nativenick);
+ }
+ args = p + 2;
+ }
+ for(peer = fn->peers; peer != NULL; peer = npeer)
+ {
+ npeer = peer->next;
+ if(peer->flags.b.delete)
+ fnetdelpeer(peer);
+ }
+ hubhandleaction(sk, fn, cmd, args);
+}
+
+static void cmd_oplist(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ struct dchub *hub;
+ char *p;
+ wchar_t *buf;
+ struct fnetpeer *peer;
+
+ hub = fn->data;
+ for(peer = fn->peers; peer != NULL; peer = peer->next)
+ peer->flags.b.op = 0;
+ while((p = strstr(args, "$$")) != NULL)
+ {
+ *p = 0;
+ if((buf = icmbstowcs(args, DCCHARSET)) != NULL)
+ {
+ if((peer = fnetfindpeer(fn, buf)) != NULL)
+ peer->flags.b.op = 1;
+ free(buf);
+ }
+ args = p + 2;
+ }
+ hubhandleaction(sk, fn, cmd, args);
+}
+
+static void cmd_myinfo(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ char *p, *p2;
+ wchar_t *buf, *wp, *wp2;
+ wchar_t abuf[10];
+ struct fnetpeer *peer;
+ struct dchub *hub;
+
+ hub = fn->data;
+ p = args;
+ if(strncmp(p, "$ALL ", 5))
+ return;
+ p += 5;
+ if((p2 = strchr(p, ' ')) == NULL)
+ return;
+ *p2 = 0;
+ if((buf = icmbstowcs(p, DCCHARSET)) == NULL)
+ return;
+ if((peer = fnetfindpeer(fn, buf)) == NULL)
+ peer = fnetaddpeer(fn, buf, buf);
+ free(buf);
+ p = p2 + 1;
+ if((p2 = strstr(p, "$ $")) == NULL)
+ return;
+ *p2 = 0;
+ if((buf = icmbstowcs(p, DCCHARSET)) == NULL)
+ return;
+ if((wcslen(buf) > 0) && (buf[wcslen(buf) - 1] == L'>') && ((wp = wcschr(buf, L'<')) != NULL))
+ {
+ buf[wcslen(buf) - 1] = L'\0';
+ *(wp++) = L'\0';
+ if((wp2 = wcschr(wp, L' ')) != NULL)
+ {
+ *(wp2++) = L'\0';
+ fnetpeersetstr(peer, L"dc-client", wp);
+ wp = wp2;
+ do
+ {
+ if((wp2 = wcschr(wp, L',')) != NULL)
+ *(wp2++) = L'\0';
+ if(wp[1] != L':')
+ continue;
+ swprintf(abuf, 10, L"dc-tag-%lc", wp[0]);
+ fnetpeersetstr(peer, abuf, wp + 2);
+ wp = wp2;
+ } while(wp2 != NULL);
+ }
+ }
+ fnetpeersetstr(peer, L"descr", buf);
+ free(buf);
+ p = p2 + 3;
+ if((p2 = strchr(p, '$')) == NULL)
+ return;
+ *(p2 - 1) = 0;
+ if((buf = icmbstowcs(p, DCCHARSET)) == NULL)
+ return;
+ fnetpeersetstr(peer, L"dc-speed", buf);
+ free(buf);
+ p = p2 + 1;
+ if((p2 = strchr(p, '$')) == NULL)
+ return;
+ *p2 = 0;
+ if((buf = icmbstowcs(p, DCCHARSET)) == NULL)
+ return;
+ fnetpeersetstr(peer, L"email", buf);
+ free(buf);
+ p = p2 + 1;
+ if(strlen(p) < 1)
+ return;
+ fnetpeersetlnum(peer, L"share", strtoll(p, NULL, 10));
+ hubhandleaction(sk, fn, cmd, args);
+}
+
+/* I do not implement the fully in that I do not disconnect from the
+ * old hub. I do this since I believe that if the hub owner really
+ * wants to get rid of us, then it is his responsibility to disconnect
+ * us. */
+static void cmd_forcemove(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ struct dchub *hub;
+ struct fnetnode *newfn;
+ int freeargs;
+
+ hub = fn->data;
+ if(strchr(args, ':') == NULL)
+ {
+ args = strcpy(smalloc(strlen(args) + 5), args);
+ strcat(args, ":411");
+ freeargs = 1;
+ } else {
+ freeargs = 0;
+ }
+ if((newfn = fnetinitconnect(L"dc", args)) != NULL)
+ {
+ linkfnetnode(newfn);
+ putfnetnode(newfn);
+ }
+ hubhandleaction(sk, fn, cmd, args);
+ if(freeargs)
+ free(args);
+}
+
+static char *getdcpath(struct sharecache *node, size_t *retlen)
+{
+ char *buf, *buf2;
+ size_t len, len2;
+
+ if(node->parent == NULL)
+ return(NULL);
+ if(node->parent == shareroot)
+ {
+ if((buf = icwcstombs(node->name, DCCHARSET)) == NULL)
+ return(NULL);
+ if(retlen != NULL)
+ *retlen = strlen(buf);
+ return(buf);
+ } else {
+ if((buf2 = icwcstombs(node->name, DCCHARSET)) == NULL)
+ return(NULL);
+ if((buf = getdcpath(node->parent, &len)) == NULL)
+ {
+ free(buf2);
+ return(NULL);
+ }
+ len2 = strlen(buf2);
+ buf = srealloc(buf, len + 1 + len2 + 1);
+ buf[len++] = '\\';
+ strcpy(buf + len, buf2);
+ buf[len + len2] = 0;
+ free(buf2);
+ if(retlen != NULL)
+ *retlen = len + len2;
+ return(buf);
+ }
+}
+
+/*
+ * This is the main share searching function for Direct Connect
+ * peers. Feel free to optimize it if you feel the need for it. I
+ * haven't ever seen it take any noticable CPU time anyway, so I
+ * haven't felt that need.
+ *
+ * It may feel dubious to just return the directory when all terms are
+ * satisfied rather than all the files in it, but it really benefits
+ * everyone: Less cycles used for us, less UDP squelching for active
+ * searchers, and less bandwidth waste for hubs when serving passive
+ * searchers.
+ */
+static void cmd_search(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ int i, done;
+ struct dchub *hub;
+ char *p, *p2;
+ char *prefix, *infix, *postfix, *buf, *buf2;
+ struct socket *dsk;
+ struct sockaddr_in addr;
+ struct sharecache *node;
+ int minsize, maxsize;
+ int dotth, buflen;
+ int termnum, satisfied, skipcheck;
+ int level, tersat[32];
+ wchar_t *terms[32];
+ char hashtth[24];
+
+ hub = fn->data;
+ if((p = strchr(args, ' ')) == NULL)
+ return;
+ *(p++) = 0;
+
+ memset(terms, 0, sizeof(terms));
+ prefix = infix = postfix = NULL;
+ dsk = NULL;
+ dotth = 0;
+
+ if(!strncmp(args, "Hub:", 4))
+ {
+ if(!strcmp(cmd, "$MultiSearch"))
+ goto out;
+ if(!strcmp(args + 4, hub->nativenick))
+ goto out;
+ prefix = sprintf2("$SR %s ", hub->nativenick);
+ infix = sprintf2(" %i/%i\005", slotsleft(), confgetint("transfer", "slots"));
+ postfix = sprintf2(" (%s)\005%s|", formataddress(fn->sk->remote, fn->sk->remotelen), args + 4);
+ dsk = sk;
+ getsock(dsk);
+ } else {
+ if((p2 = strchr(args, ':')) == NULL)
+ goto out;
+ *(p2++) = 0;
+ addr.sin_family = AF_INET;
+ if(!inet_aton(args, &addr.sin_addr))
+ goto out;
+ addr.sin_port = htons(atoi(p2));
+ prefix = sprintf2("$SR %s ", hub->nativenick);
+ infix = sprintf2(" %i/%i\005", slotsleft(), confgetint("transfer", "slots"));
+ postfix = sprintf2(" (%s)|", formataddress(fn->sk->remote, fn->sk->remotelen));
+ netdgramconn(dsk = netdupsock(udpsock), (struct sockaddr *)&addr, sizeof(addr));
+ }
+
+ minsize = maxsize = -1;
+ if(*p == 0)
+ goto out;
+ if(*(p++) == 'T')
+ minsize = 0;
+ if(*(p++) != '?')
+ goto out;
+ if(*p == 0)
+ goto out;
+ if(*(p++) == 'T')
+ {
+ maxsize = 0;
+ minsize = -1;
+ }
+ if(*(p++) != '?')
+ goto out;
+ if((p2 = strchr(p, '?')) == NULL)
+ goto out;
+ *(p2++) = 0;
+ if(minsize == 0)
+ minsize = atoi(p);
+ if(maxsize == 0)
+ maxsize = atoi(p);
+ p = p2 + 1;
+ if(*(p++) != '?')
+ goto out;
+ termnum = 0;
+ p2 = p;
+ done = 0;
+ while(!done)
+ {
+ if((*p2 == 0) || (*p2 == '$'))
+ {
+ if(*p2 == 0)
+ done = 1;
+ else
+ *p2 = 0;
+ if(*p)
+ {
+ if(!dotth && !strncmp(p, "TTH:", 4))
+ {
+ dotth = 1;
+ if((buf = base32decode(p + 4, &buflen)) == NULL)
+ goto out;
+ if(buflen != 24)
+ goto out;
+ memcpy(hashtth, buf, 24);
+ free(buf);
+ } else {
+ if((terms[termnum] = icmbstowcs(p, DCCHARSET)) != NULL)
+ termnum++;
+ }
+ }
+ p = p2 + 1;
+ if(termnum == 32)
+ break;
+ }
+ p2++;
+ }
+
+ node = shareroot->child;
+ level = 0;
+ for(i = 0; i < termnum; i++)
+ tersat[i] = -1;
+ satisfied = 0;
+ while(1)
+ {
+ skipcheck = 0;
+ if(node->f.b.type == FILE_REG)
+ {
+ if((minsize >= 0) && (node->size < minsize))
+ skipcheck = 1;
+ if((maxsize >= 0) && (node->size > maxsize))
+ skipcheck = 1;
+ }
+ if(!skipcheck && dotth)
+ {
+ if((node->f.b.type != FILE_REG) || (node->f.b.hastth && memcmp(hashtth, node->hashtth, 24)))
+ skipcheck = 1;
+ }
+ if(!skipcheck)
+ {
+ for(i = 0; i < termnum; i++)
+ {
+ if(tersat[i] >= 0)
+ continue;
+ if(wcsexists(node->name, terms[i]))
+ {
+ tersat[i] = level;
+ satisfied++;
+ } else if(node->child == NULL) {
+ break;
+ }
+ }
+ }
+ if(!skipcheck && (satisfied == termnum))
+ {
+ if((buf = getdcpath(node, NULL)) != NULL)
+ {
+ if(node->f.b.hastth)
+ {
+ buf2 = base32encode(node->hashtth, 24);
+ qstrf(dsk, "%s%s\005%i%sTTH:%.39s%s", prefix, buf, node->size, infix, buf2, postfix);
+ free(buf2);
+ } else {
+ qstrf(dsk, "%s%s\005%i%s%s%s", prefix, buf, node->size, infix, hub->nativename, postfix);
+ }
+ free(buf);
+ }
+ }
+ if((!skipcheck && (satisfied == termnum)) || (node->child == NULL))
+ {
+ while(node->next == NULL)
+ {
+ if((node = node->parent) == shareroot)
+ break;
+ level--;
+ }
+ if(node == shareroot)
+ break;
+ for(i = 0; i < termnum; i++)
+ {
+ if(tersat[i] >= level)
+ {
+ tersat[i] = -1;
+ satisfied--;
+ }
+ }
+ node = node->next;
+ } else {
+ node = node->child;
+ level++;
+ }
+ }
+
+ hubhandleaction(sk, fn, cmd, args);
+
+ out:
+ if(dsk != NULL)
+ putsock(dsk);
+ if(prefix != NULL)
+ free(prefix);
+ if(infix != NULL)
+ free(infix);
+ if(postfix != NULL)
+ free(postfix);
+ for(i = 0; (i < 32) && (terms[i] != NULL); i++)
+ free(terms[i]);
+}
+
+static void cmd_connecttome(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ char *p;
+ struct dchub *hub;
+ struct socket *newsk;
+ struct sockaddr_in addr;
+
+ hub = fn->data;
+ if((p = strchr(args, ' ')) == NULL)
+ return;
+ *(p++) = 0;
+ if(strcmp(args, hub->nativenick))
+ return;
+ addr.sin_family = AF_INET;
+ args = p;
+ if((p = strchr(args, ':')) == NULL)
+ return;
+ *(p++) = 0;
+ addr.sin_port = htons(atoi(p));
+ if(!inet_aton(args, &addr.sin_addr))
+ return;
+ newsk = netcsconn((struct sockaddr *)&addr, sizeof(addr), (void (*)(struct socket *, int, void *))peerconnect, fn);
+ getfnetnode(fn);
+ hubhandleaction(sk, fn, cmd, args);
+}
+
+static void sendctm(struct socket *sk, char *nick)
+{
+ struct sockaddr *addr;
+ socklen_t addrlen;
+
+ if(tcpsock == NULL)
+ return;
+ if(sockgetremotename(tcpsock, &addr, &addrlen) < 0)
+ return;
+ if(addr->sa_family == AF_INET)
+ qstrf(sk, "$ConnectToMe %s %s|", nick, formataddress(addr, addrlen));
+ else
+ flog(LOG_WARNING, "Direct Connect TCP socket is suddenly not AF_INET, but %i", addr->sa_family);
+ free(addr);
+}
+
+static void cmd_revconnecttome(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ struct dchub *hub;
+ char *p;
+
+ hub = fn->data;
+ if((p = strchr(args, ' ')) == NULL)
+ return;
+ *(p++) = 0;
+ if(strcmp(p, hub->nativenick))
+ return;
+ sendctm(sk, args);
+ expectpeer(args, fn);
+ hubhandleaction(sk, fn, cmd, args);
+}
+
+static void cmd_getnetinfo(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ struct dchub *hub;
+ struct fnetnode *node;
+ int numhubs;
+
+ hub = fn->data;
+ numhubs = 0;
+ for(node = fnetnodes; node != NULL; node = node->next)
+ {
+ if(node->state == FNN_EST)
+ numhubs++;
+ }
+ qstrf(sk, "$NetInfo %i$%i$%c$0|", confgetint("transfer", "slots"), numhubs, (tcpsock == NULL)?'P':'A');
+ hubhandleaction(sk, fn, cmd, args);
+}
+
+static void cmd_to(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ struct dchub *hub;
+ char *p, *p2;
+
+ hub = fn->data;
+ p = args;
+ if((p2 = strchr(p, ' ')) == NULL)
+ return;
+ *(p2++) = 0;
+ p = p2;
+ if((p2 = strchr(p, ' ')) == NULL)
+ return;
+ *(p2++) = 0;
+ if(strcmp(p, "From:"))
+ return;
+ p = p2;
+ if((p2 = strstr(p, " $")) == NULL)
+ return;
+ *p2 = 0;
+ p2 += 2;
+ hubrecvchat(fn->sk, fn, p, p2);
+ hubhandleaction(sk, fn, cmd, args);
+}
+
+static void cmd_sr(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ struct dchub *hub;
+ char *p, *p2;
+ char *nick, *filename, *hubname;
+ int size, slots;
+ struct srchres *sr;
+ wchar_t *wnick, *wfile;
+
+ hub = fn->data;
+ nick = p = args;
+ if((p2 = strchr(p, ' ')) == NULL)
+ return;
+ *p2 = 0;
+ p = p2 + 1;
+ filename = p;
+ if((p2 = strchr(p, 5)) == NULL)
+ return;
+ *p2 = 0;
+ p = p2 + 1;
+ if((p2 = strchr(p, ' ')) == NULL)
+ return;
+ *p2 = 0;
+ size = atoi(p);
+ p = p2 + 1;
+ if((p2 = strchr(p, '/')) == NULL)
+ return;
+ *p2 = 0;
+ slots = atoi(p);
+ p = p2 + 1;
+ if((p2 = strchr(p, 5)) == NULL)
+ return;
+ p = p2 + 1;
+ hubname = p;
+ if((p2 = strstr(p, " (")) == NULL)
+ return;
+ *p2 = 0;
+ if((wnick = icmbstowcs(nick, DCCHARSET)) == NULL)
+ return;
+ if((wfile = icmbstowcs(filename, DCCHARSET)) == NULL)
+ {
+ free(wnick);
+ return;
+ }
+ sr = newsrchres(&dcnet, wfile, wnick);
+ if(sr->peernick != NULL)
+ free(sr->peernick);
+ sr->peernick = swcsdup(wnick);
+ sr->size = size;
+ sr->slots = slots;
+ free(wfile);
+ free(wnick);
+ getfnetnode(sr->fn = fn);
+ submitsrchres(sr);
+ freesrchres(sr);
+ hubhandleaction(sk, fn, cmd, args);
+}
+
+static void cmd_usercommand(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ /* Do nothing for now. */
+}
+
+static void cmd_mynick(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
+{
+ if(peer->nativename != NULL)
+ free(peer->nativename);
+ peer->nativename = sstrdup(args);
+ if(peer->wcsname != NULL)
+ free(peer->wcsname);
+ if((peer->wcsname = icmbstowcs(peer->nativename, DCCHARSET)) == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ peerhandleaction(sk, peer, cmd, args);
+}
+
+static void cmd_direction(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
+{
+ char *p;
+
+ if((p = strchr(args, ' ')) == NULL)
+ return;
+ *p = 0;
+ if(!strcmp(args, "Upload"))
+ peer->direction = TRNSD_DOWN;
+ if(!strcmp(args, "Download"))
+ peer->direction = TRNSD_UP;
+ peerhandleaction(sk, peer, cmd, args);
+}
+
+static void cmd_peerlock(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
+{
+ char *p;
+
+ if((p = strchr(args, ' ')) == NULL)
+ return;
+ *p = 0;
+ if(!strncmp(args, "EXTENDEDPROTOCOL", 16))
+ peer->extended = 1;
+ if(peer->key != NULL)
+ free(peer->key);
+ peer->key = dcmakekey(args);
+ peerhandleaction(sk, peer, cmd, args);
+}
+
+static void cmd_key(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
+{
+ peerhandleaction(sk, peer, cmd, args);
+}
+
+static void cmd_filelength(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
+{
+ int size;
+
+ if(peer->transfer == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ size = atoi(args);
+ if(peer->transfer->size == size)
+ {
+
+ } else {
+ /* Will have to restart, then... I really hate this, but what
+ * am I to do then, considering the DC protocol requires the
+ * resume offset before it sends the filesize? */
+ transfersetsize(peer->transfer, size);
+ freedcpeer(peer);
+ return;
+ }
+ peerhandleaction(sk, peer, cmd, args);
+}
+
+static void cmd_error(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
+{
+ if((peer->transfer != NULL) && (peer->transfer->dir == TRNSD_DOWN))
+ {
+ transferseterror(peer->transfer, TRNSE_NOTFOUND);
+ resettransfer(peer->transfer);
+ return;
+ }
+ freedcpeer(peer);
+}
+
+static void cmd_maxedout(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
+{
+ if((peer->transfer != NULL) && (peer->transfer->dir == TRNSD_DOWN))
+ {
+ transferseterror(peer->transfer, TRNSE_NOSLOTS);
+ resettransfer(peer->transfer);
+ return;
+ }
+ freedcpeer(peer);
+}
+
+static struct
+{
+ char *name;
+ char **file;
+ void (*func)(void);
+} lists[] =
+{
+ {"MyList.DcLst", &hmlistname, updatehmlist},
+ {"files.xml", &xmllistname, updatexmllist},
+ {"files.xml.bz2", &xmlbz2listname, updatexmlbz2list},
+ {NULL, NULL}
+};
+
+static int openfilelist(char *name)
+{
+ int i, fd;
+ int errnobak;
+
+ for(i = 0; lists[i].name != NULL; i++)
+ {
+ if(!strcmp(name, lists[i].name))
+ break;
+ }
+ errno = 0;
+ if(lists[i].name == NULL)
+ return(-1);
+ fd = -1;
+ if((*lists[i].file == NULL) || ((fd = open(*lists[i].file, O_RDONLY)) < 0))
+ lists[i].func();
+ if((fd < 0) && ((*lists[i].file == NULL) || ((fd = open(*lists[i].file, O_RDONLY)) < 0)))
+ {
+ errnobak = errno;
+ flog(LOG_ERR, "could not open filelist tempfile: %s", strerror(errno));
+ errno = errnobak;
+ return(-1);
+ }
+ return(fd);
+}
+
+static struct sharecache *findbytth(char *tth32)
+{
+ char *buf;
+ size_t buflen;
+ struct sharecache *node;
+
+ if((buf = base32decode(tth32, &buflen)) == NULL)
+ return(NULL);
+ if(buflen != 24)
+ {
+ free(buf);
+ return(NULL);
+ }
+ for(node = shareroot->child; node != NULL; node = nextscnode(node))
+ {
+ if(node->f.b.hastth && !memcmp(node->hashtth, buf, 24))
+ break;
+ }
+ free(buf);
+ return(node);
+}
+
+static struct sharecache *resdcpath(char *path, char *charset, char sep)
+{
+ struct sharecache *node;
+ char *p, *p2;
+
+ node = shareroot;
+ p = path;
+ while(p != NULL)
+ {
+ if((p2 = strchr(p, sep)) != NULL)
+ *(p2++) = 0;
+ if((node = findcache(node, icsmbstowcs(p, charset, L""))) == NULL)
+ return(NULL);
+ p = p2;
+ }
+ return(node);
+}
+
+static void cmd_get(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
+{
+ int offset;
+ char *p, *buf;
+ wchar_t *buf2;
+ struct sharecache *node;
+ struct socket *lesk;
+ int fd;
+ struct stat sb;
+
+ if(peer->transfer == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ if((p = strchr(args, '$')) == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ *(p++) = 0;
+ if((offset = (atoi(p) - 1)) < 0)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ if(((fd = openfilelist(args)) < 0) && (errno != 0))
+ {
+ qstr(sk, "$Error Could not send file list|");
+ freedcpeer(peer);
+ return;
+ } else if(fd >= 0) {
+ if((buf2 = icsmbstowcs(args, DCCHARSET, NULL)) != NULL)
+ transfersetpath(peer->transfer, buf2);
+ }
+ if(fd < 0)
+ {
+ if(slotsleft() < 1)
+ {
+ qstr(sk, "$MaxedOut|");
+ freedcpeer(peer);
+ return;
+ }
+ if((node = resdcpath(args, DCCHARSET, '\\')) == NULL)
+ {
+ qstrf(sk, "$Error File not in share|");
+ freedcpeer(peer);
+ return;
+ }
+ if((fd = opensharecache(node)) < 0)
+ {
+ qstrf(sk, "$Error %s|", strerror(errno));
+ freedcpeer(peer);
+ return;
+ }
+ buf = getfspath(node);
+ if((buf2 = icsmbstowcs(buf, NULL, NULL)) == NULL)
+ flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
+ else
+ transfersetpath(peer->transfer, buf2);
+ free(buf);
+ }
+ if(fstat(fd, &sb) < 0)
+ {
+ close(fd);
+ flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
+ qstrf(sk, "$Error|");
+ freedcpeer(peer);
+ return;
+ }
+ if((offset != 0) && (lseek(fd, offset, SEEK_SET) < 0))
+ {
+ close(fd);
+ qstrf(sk, "$Error Offset out of range|");
+ freedcpeer(peer);
+ return;
+ }
+ lesk = wrapsock(fd);
+ transferprepul(peer->transfer, sb.st_size, offset, -1, lesk);
+ putsock(lesk);
+ qstrf(sk, "$FileLength %i|", peer->transfer->size);
+ peerhandleaction(sk, peer, cmd, args);
+}
+
+static void starttrans(struct dcpeer *peer)
+{
+ peer->state = PEER_TRNS;
+ transferstartul(peer->transfer, peer->sk);
+ peer->sk->writecb = (void (*)(struct socket *, void *))transwrite;
+}
+
+static void cmd_send(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
+{
+ if(peer->transfer == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ if(peer->transfer->localend == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ peer->ptclose = 1;
+ starttrans(peer);
+ peerhandleaction(sk, peer, cmd, args);
+}
+
+static void cmd_supports(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
+{
+ int i;
+ char *p, *p2;
+ char **arr;
+ size_t arrsize, arrdata;
+
+ if(peer->supports != NULL)
+ {
+ for(i = 0; peer->supports[i] != NULL; i++)
+ free(peer->supports[i]);
+ free(peer->supports);
+ }
+ arr = NULL;
+ arrsize = arrdata = 0;
+ p = args;
+ do
+ {
+ if((p2 = strchr(p, ' ')) != NULL)
+ *(p2++) = 0;
+ if(*p == 0)
+ continue;
+ addtobuf(arr, sstrdup(p));
+ } while((p = p2) != NULL);
+ addtobuf(arr, NULL);
+ peer->supports = arr;
+ peerhandleaction(sk, peer, cmd, args);
+}
+
+static void cmd_getblock(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
+{
+ int fd;
+ char *p, *p2;
+ int start, numbytes;
+ char *charset, *buf;
+ wchar_t *buf2;
+ struct sharecache *node;
+ struct stat sb;
+ struct socket *lesk;
+
+ if(peer->transfer == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ p = args;
+ if((p2 = strchr(p, ' ')) == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ *(p2++) = 0;
+ start = atoi(p);
+ p = p2;
+ if((p2 = strchr(p, ' ')) == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ *(p2++) = 0;
+ numbytes = atoi(p);
+ p = p2;
+ if(!strcmp(cmd, "$UGetBlock") || !strcmp(cmd, "$UGetZBlock"))
+ charset = "UTF-8";
+ else
+ charset = DCCHARSET;
+ if(!strcmp(cmd, "$GetZBlock") || !strcmp(cmd, "$UGetZBlock"))
+ initcompress(peer, CPRS_ZLIB);
+ if(((fd = openfilelist(p)) < 0) && (errno != 0))
+ {
+ qstr(sk, "$Error Could not send file list|");
+ return;
+ } else if(fd >= 0) {
+ if((buf2 = icsmbstowcs(args, charset, NULL)) != NULL)
+ transfersetpath(peer->transfer, buf2);
+ }
+ if(fd < 0)
+ {
+ if(slotsleft() < 1)
+ {
+ qstr(sk, "$MaxedOut|");
+ return;
+ }
+ if((node = resdcpath(p, charset, '\\')) == NULL)
+ {
+ qstr(sk, "$Error File not in cache|");
+ return;
+ }
+ if((fd = opensharecache(node)) < 0)
+ {
+ qstrf(sk, "$Error %s|", strerror(errno));
+ return;
+ }
+ buf = getfspath(node);
+ if((buf2 = icsmbstowcs(buf, NULL, NULL)) == NULL)
+ flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
+ else
+ transfersetpath(peer->transfer, buf2);
+ free(buf);
+ }
+ if(fstat(fd, &sb) < 0)
+ {
+ close(fd);
+ flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
+ qstr(sk, "$Error|");
+ return;
+ }
+ if((start != 0) && ((start >= sb.st_size) || (lseek(fd, start, SEEK_SET) < 0)))
+ {
+ close(fd);
+ qstr(sk, "$Error Offset out of range|");
+ return;
+ }
+ if((numbytes < 0) || (start + numbytes > sb.st_size))
+ numbytes = sb.st_size - start;
+ lesk = wrapsock(fd);
+ transferprepul(peer->transfer, sb.st_size, start, start + numbytes, lesk);
+ putsock(lesk);
+ qstrf(sk, "$Sending %i|", numbytes);
+ starttrans(peer);
+ peerhandleaction(sk, peer, cmd, args);
+}
+
+static void cmd_adcget(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
+{
+ int i;
+ char **argv, *buf;
+ int start, numbytes;
+ struct sharecache *node;
+ struct stat sb;
+ struct socket *lesk;
+ wchar_t *wbuf;
+ int fd;
+
+ if(peer->transfer == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ if((argv = parseadc(args)) == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ if(parrlen(argv) < 4)
+ {
+ freedcpeer(peer);
+ goto out;
+ }
+ start = atoi(argv[2]);
+ numbytes = atoi(argv[3]);
+ node = NULL;
+ fd = -1;
+ if(((fd = openfilelist(argv[1])) < 0) && (errno != 0))
+ {
+ qstr(sk, "$Error Could not send file list|");
+ goto out;
+ } else if(fd >= 0) {
+ if((wbuf = icsmbstowcs(argv[1], "UTF-8", NULL)) != NULL)
+ transfersetpath(peer->transfer, wbuf);
+ }
+ if(fd < 0)
+ {
+ if(slotsleft() < 1)
+ {
+ qstr(sk, "$MaxedOut|");
+ goto out;
+ }
+ if(!strncmp(argv[1], "TTH/", 4))
+ {
+ if((node = findbytth(argv[1] + 4)) == NULL)
+ {
+ qstr(sk, "$Error File not in cache|");
+ goto out;
+ }
+ } else {
+ if((node = resdcpath(argv[1], "UTF-8", '/')) == NULL)
+ {
+ qstr(sk, "$Error File not in cache|");
+ goto out;
+ }
+ }
+ if((fd = opensharecache(node)) < 0)
+ {
+ qstrf(sk, "$Error %s|", strerror(errno));
+ goto out;
+ }
+ buf = getfspath(node);
+ if((wbuf = icsmbstowcs(buf, NULL, NULL)) == NULL)
+ flog(LOG_WARNING, "could not convert native path into a wcs (%s): %s", buf, strerror(errno));
+ else
+ transfersetpath(peer->transfer, wbuf);
+ free(buf);
+ }
+ if(!strcmp(argv[0], "file"))
+ {
+ for(i = 4; argv[i] != NULL; i++)
+ {
+ if(!strcmp(argv[i], "ZL1"))
+ initcompress(peer, CPRS_ZLIB);
+ }
+ if(fstat(fd, &sb) < 0)
+ {
+ flog(LOG_WARNING, "could not stat file %ls: %s", node->name, strerror(errno));
+ qstr(sk, "$Error|");
+ goto out;
+ }
+ if((start != 0) && ((start >= sb.st_size) || (lseek(fd, start, SEEK_SET) < 0)))
+ {
+ qstr(sk, "$Error Offset out of range|");
+ goto out;
+ }
+ if((numbytes < 0) || (start + numbytes > sb.st_size))
+ numbytes = sb.st_size - start;
+ lesk = wrapsock(fd);
+ transferprepul(peer->transfer, sb.st_size, start, start + numbytes, lesk);
+ putsock(lesk);
+ fd = -1;
+ qstr(sk, "$ADCSND");
+ sendadc(sk, "file");
+ sendadc(sk, argv[1]);
+ sendadcf(sk, "%i", start);
+ sendadcf(sk, "%i", numbytes);
+ if(peer->compress == CPRS_ZLIB)
+ sendadc(sk, "ZL1");
+ qstr(sk, "|");
+ starttrans(peer);
+ } else if(!strcmp(argv[0], "tthl")) {
+ /*
+ * XXX: Implement full TTHL support.
+ *
+ * In the meantime, this is better than nothing, since it at
+ * least allows fetching of the TTH root if it isn't already
+ * known.
+ */
+ if(node == NULL)
+ {
+ qstr(sk, "$Error no TTHL data for virtual files|");
+ goto out;
+ }
+ qstr(sk, "$ADCSND");
+ sendadc(sk, "tthl");
+ sendadc(sk, argv[1]);
+ sendadc(sk, "0");
+ sendadc(sk, "24");
+ qstr(sk, "|");
+ sockqueue(sk, node->hashtth, 24);
+ } else {
+ qstr(sk, "$Error Namespace not implemented|");
+ goto out;
+ }
+ peerhandleaction(sk, peer, cmd, args);
+
+ out:
+ if(fd >= 0)
+ close(fd);
+ freeparr(argv);
+}
+
+/*
+Hub skeleton:
+static void cmd_(struct socket *sk, struct fnetnode *fn, char *cmd, char *args)
+{
+ struct dchub *hub;
+
+ hub = fn->data;
+ hubhandleaction(sk, fn, cmd, args);
+}
+
+Peer skeleton:
+static void cmd_(struct socket *sk, struct dcpeer *peer, char *cmd, char *args)
+{
+ peerhandleaction(sk, peer, cmd, args);
+}
+
+*/
+
+static int hubreqconn(struct fnetpeer *peer)
+{
+ struct dchub *hub;
+ char *mbsnick;
+
+ if((peer->fn->state != FNN_EST) || (peer->fn->fnet != &dcnet))
+ {
+ errno = EINVAL;
+ return(1);
+ }
+ if((hub = peer->fn->data) == NULL)
+ {
+ errno = EFAULT;
+ return(1);
+ }
+ if((mbsnick = icwcstombs(peer->id, DCCHARSET)) == NULL)
+ return(1); /* Shouldn't happen, of course, but who knows... */
+ if(tcpsock != NULL)
+ {
+ sendctm(peer->fn->sk, mbsnick);
+ expectpeer(mbsnick, peer->fn);
+ } else {
+ qstrf(peer->fn->sk, "$RevConnectToMe %s %s|", hub->nativenick, mbsnick);
+ }
+ free(mbsnick);
+ return(0);
+}
+
+static int hubsendchat(struct fnetnode *fn, int public, wchar_t *to, wchar_t *string)
+{
+ struct dchub *hub;
+ char *mbsstring, *mbsto;
+
+ hub = fn->data;
+ if((mbsto = icwcstombs(to, DCCHARSET)) == NULL)
+ {
+ errno = EILSEQ;
+ return(1);
+ }
+ if((mbsstring = icwcstombs(string, DCCHARSET)) == NULL)
+ {
+ errno = EILSEQ;
+ return(1);
+ }
+ if((strchr(mbsto, '|') != NULL) || (strchr(mbsto, ' ') != NULL))
+ {
+ free(mbsto);
+ free(mbsstring);
+ errno = ESRCH;
+ return(1);
+ }
+ if(strchr(mbsstring, '|') != NULL)
+ {
+ free(mbsto);
+ free(mbsstring);
+ errno = EILSEQ;
+ return(1);
+ }
+ if(public)
+ {
+ if(*to == L'\0')
+ {
+ qstrf(fn->sk, "<%s> %s|", hub->nativenick, mbsstring);
+ } else {
+ qstrf(fn->sk, "$To: %s From: %s $<%s> %s|", mbsto, hub->nativenick, hub->nativenick, mbsstring);
+ }
+ } else {
+ qstrf(fn->sk, "$To: %s From: %s $<%s> %s|", mbsto, hub->nativenick, hub->nativenick, mbsstring);
+ }
+ free(mbsto);
+ free(mbsstring);
+ return(0);
+}
+
+static void findsizelimit(struct sexpr *sexpr, int *min, int *max)
+{
+ int minl, maxl, minr, maxr, retmin, retmax;
+
+ switch(sexpr->op)
+ {
+ case SOP_AND:
+ findsizelimit(sexpr->l, &minl, &maxl);
+ findsizelimit(sexpr->r, &minr, &maxr);
+ retmin = (minl > minr)?minl:minr;
+ if((maxl != -1) && (maxr != -1))
+ retmax = (maxl < maxr)?maxl:maxr;
+ else if(maxl != -1)
+ retmax = maxl;
+ else if(maxr != -1)
+ retmax = maxr;
+ else
+ retmax = -1;
+ break;
+ case SOP_OR:
+ findsizelimit(sexpr->l, &minl, &maxl);
+ findsizelimit(sexpr->r, &minr, &maxr);
+ retmin = (minl < minr)?minl:minr;
+ if((maxl == -1) || (maxr == -1))
+ retmax = -1;
+ else
+ retmax = (maxl > maxr)?maxl:maxr;
+ break;
+ case SOP_NOT:
+ findsizelimit(sexpr->l, &minl, &maxl);
+ if((minl == 0) && (maxl == -1)) /* Interval is unspecified */
+ {
+ retmin = 0;
+ retmax = -1;
+ } else if((minl == 0) && (maxl != -1)) {
+ retmin = maxl + 1;
+ retmax = -1;
+ } else if((minl != 0) && (maxl == -1)) {
+ retmin = 0;
+ retmax = minl - 1;
+ } else { /* This would yield two seperate intervals, which DC cannot handle */
+ retmin = 0;
+ retmax = -1;
+ }
+ case SOP_SIZELT:
+ retmin = 0;
+ retmax = sexpr->d.n - 1;
+ break;
+ case SOP_SIZEEQ:
+ retmin = sexpr->d.n;
+ retmax = sexpr->d.n;
+ break;
+ case SOP_SIZEGT:
+ retmin = sexpr->d.n + 1;
+ retmax = -1;
+ break;
+ default:
+ retmin = 0;
+ retmax = -1;
+ break;
+ }
+ if(min != NULL)
+ *min = retmin;
+ if(max != NULL)
+ *max = retmax;
+}
+
+static int hubsearch(struct fnetnode *fn, struct search *srch, struct srchfnnlist *ln)
+{
+ struct dchub *hub;
+ struct wcslist *list, *cur;
+ char *sstr, *buf, *p;
+ size_t sstrsize, sstrdata;
+ struct sockaddr *name;
+ socklen_t namelen;
+ int minsize, maxsize;
+ char sizedesc[32];
+
+ hub = fn->data;
+ if((fn->state != FNN_EST) || (fn->sk == NULL) || (fn->sk->state != SOCK_EST))
+ return(1);
+ list = findsexprstrs(srch->sexpr);
+ findsizelimit(srch->sexpr, &minsize, &maxsize);
+ if((minsize != 0) && (maxsize != -1))
+ {
+ /* Choose either minsize or maxsize by trying to determine
+ * which choice will be most restrictive. The result can be
+ * approximative at best anyway, so don't try too hard... */
+ if((50000000 - maxsize) > (minsize - 50000000))
+ minsize = 0;
+ else
+ maxsize = -1;
+ }
+ if(minsize != 0)
+ {
+ snprintf(sizedesc, sizeof(sizedesc), "T?F?%i", minsize);
+ } else if(maxsize != -1) {
+ snprintf(sizedesc, sizeof(sizedesc), "T?T?%i", maxsize);
+ } else {
+ strcpy(sizedesc, "F?F?0");
+ }
+ sstr = NULL;
+ sstrsize = sstrdata = 0;
+ if(list != NULL)
+ {
+ for(cur = list; cur != NULL; cur = cur->next)
+ {
+ if((buf = icwcstombs(cur->str, DCCHARSET)) == NULL)
+ {
+ /* Can't find anything anyway if the search expression
+ * requires characters outside DC's charset. There's
+ * nothing technically wrong with the search itself,
+ * however, so return success. This should be
+ * considered as an optimization. */
+ freesl(&list);
+ if(sstr != NULL)
+ free(sstr);
+ return(0);
+ }
+ if(cur != list)
+ addtobuf(sstr, '$');
+ /*
+ * It probably doesn't hurt if buf contains any extra
+ * dollar signs - it will just result in extra search
+ * terms, and the extraneous results will be filtered by
+ * the search layer anyway. It hurts if it contains any
+ * pipes, though, so let's sell them for money.
+ */
+ for(p = buf; *p; p++)
+ {
+ if(*p == '|')
+ *p = '$';
+ }
+ bufcat(sstr, buf, strlen(buf));
+ free(buf);
+ }
+ } else {
+ /* Will match all files... :-/ */
+ addtobuf(sstr, '.');
+ }
+ addtobuf(sstr, 0);
+ if(tcpsock != NULL)
+ {
+ if(sockgetremotename(udpsock, &name, &namelen) < 0)
+ {
+ flog(LOG_WARNING, "cannot get address of UDP socket");
+ } else {
+ qstrf(fn->sk, "$Search %s %s?1?%s|", formataddress(name, namelen), sizedesc, sstr);
+ free(name);
+ }
+ } else {
+ qstrf(fn->sk, "$Search Hub:%s %s?1?%s|", hub->nativenick, sizedesc, sstr);
+ }
+ free(sstr);
+ freesl(&list);
+ fn->lastsrch = time(NULL);
+ return(0);
+}
+
+#undef skipcmd
+#undef qstr
+#undef qstrf
+
+#define cc(c) ((void (*)(struct socket *, void *, char *, char *))(c))
+struct command hubcmds[] =
+{
+ {"$Lock", cc(cmd_lock)},
+ {"$HubName", cc(cmd_hubname)},
+ {"$Hello", cc(cmd_hello)},
+ {"$Quit", cc(cmd_quit)},
+ {"$NickList", cc(cmd_nicklist)},
+ {"$OpList", cc(cmd_oplist)},
+ {"$MyINFO", cc(cmd_myinfo)},
+ {"$ForceMove", cc(cmd_forcemove)},
+ {"$Search", cc(cmd_search)},
+ {"$MultiSearch", cc(cmd_search)},
+ {"$ConnectToMe", cc(cmd_connecttome)},
+ {"$RevConnectToMe", cc(cmd_revconnecttome)},
+ {"$GetNetInfo", cc(cmd_getnetinfo)},
+ {"$To:", cc(cmd_to)},
+ {"$SR", cc(cmd_sr)},
+ {"$UserCommand", cc(cmd_usercommand)},
+ {NULL, NULL}
+};
+
+struct command peercmds[] =
+{
+ {"$MyNick", cc(cmd_mynick)},
+ {"$Lock", cc(cmd_peerlock)},
+ {"$Direction", cc(cmd_direction)},
+ {"$Key", cc(cmd_key)},
+ {"$FileLength", cc(cmd_filelength)},
+ {"$Error", cc(cmd_error)},
+ {"$MaxedOut", cc(cmd_maxedout)},
+ {"$Get", cc(cmd_get)},
+ {"$Send", cc(cmd_send)},
+ {"$Supports", cc(cmd_supports)},
+ {"$GetBlock", cc(cmd_getblock)},
+ {"$UGetBlock", cc(cmd_getblock)},
+ {"$GetZBlock", cc(cmd_getblock)},
+ {"$UGetZBlock", cc(cmd_getblock)},
+ {"$ADCGET", cc(cmd_adcget)},
+ {NULL, NULL}
+};
+#undef cc
+
+static void dctransdetach(struct transfer *transfer, struct dcpeer *peer)
+{
+ CBUNREG(transfer, trans_filterout, peer);
+ if(peer->freeing)
+ return;
+ peer->transfer = NULL;
+ freedcpeer(peer);
+}
+
+static void dctransgotdata(struct transfer *transfer, struct dcpeer *peer)
+{
+ int ret;
+ void *buf;
+ char outbuf[1024];
+ z_stream *cstr;
+ size_t bufsize;
+
+ if((peer->state == PEER_TRNS) || (peer->state == PEER_SYNC))
+ {
+ if(sockqueuesize(peer->sk) < 65536)
+ {
+ if((buf = transfergetdata(transfer, &bufsize)) != NULL)
+ {
+ if(peer->compress == CPRS_NONE)
+ {
+ sockqueue(peer->sk, buf, bufsize);
+ } else if(peer->compress == CPRS_ZLIB) {
+ cstr = peer->cprsdata;
+ cstr->next_in = buf;
+ cstr->avail_in = bufsize;
+ while(cstr->avail_in > 0)
+ {
+ cstr->next_out = outbuf;
+ cstr->avail_out = sizeof(outbuf);
+ if((ret = deflate(cstr, 0)) != Z_OK)
+ {
+ flog(LOG_WARNING, "bug? deflate() did not return Z_OK (but rather %i)", ret);
+ freedcpeer(peer);
+ return;
+ }
+ sockqueue(peer->sk, outbuf, sizeof(outbuf) - cstr->avail_out);
+ }
+ }
+ free(buf);
+ }
+ if(peer->state == PEER_SYNC)
+ {
+ if(peer->compress == CPRS_ZLIB)
+ {
+ cstr = peer->cprsdata;
+ cstr->next_in = NULL;
+ cstr->avail_in = 0;
+ do
+ {
+ cstr->next_out = outbuf;
+ cstr->avail_out = sizeof(outbuf);
+ ret = deflate(cstr, Z_FINISH);
+ if((ret != Z_OK) && (ret != Z_STREAM_END))
+ {
+ flog(LOG_WARNING, "bug? deflate(Z_FINISH) did not return Z_OK (but rather %i)", ret);
+ freedcpeer(peer);
+ return;
+ }
+ sockqueue(peer->sk, outbuf, sizeof(outbuf) - cstr->avail_out);
+ } while(ret != Z_STREAM_END);
+ }
+ if(peer->ptclose)
+ {
+ freedcpeer(peer);
+ } else {
+ peer->state = PEER_CMD;
+ endcompress(peer);
+ transfersetstate(transfer, TRNS_HS);
+ socksettos(peer->sk, confgetint("fnet", "fnptos"));
+ peer->sk->writecb = NULL;
+ }
+ }
+ }
+ }
+}
+
+static void dctransendofdata(struct transfer *transfer, struct dcpeer *peer)
+{
+ peer->state = PEER_SYNC;
+ dctransgotdata(transfer, peer);
+}
+
+static void dcwantdata(struct transfer *transfer, struct dcpeer *peer)
+{
+ if(transferdatasize(transfer) < 65536)
+ peer->sk->ignread = 0;
+}
+
+static void transread(struct socket *sk, struct dcpeer *peer)
+{
+ void *buf;
+ size_t bufsize;
+ struct transfer *transfer;
+
+ if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
+ return;
+ if(peer->transfer == NULL)
+ {
+ free(buf);
+ freedcpeer(peer);
+ return;
+ }
+ transferputdata(peer->transfer, buf, bufsize);
+ free(buf);
+ if(peer->transfer->curpos >= peer->transfer->size)
+ {
+ transfer = peer->transfer;
+ transferdetach(transfer);
+ transferendofdata(transfer);
+ return;
+ }
+ if(transferdatasize(peer->transfer) > 65535)
+ sk->ignread = 1;
+}
+
+static void transerr(struct socket *sk, int err, struct dcpeer *peer)
+{
+ struct transfer *transfer;
+
+ if((transfer = peer->transfer) == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ transferdetach(transfer);
+ transferendofdata(transfer);
+}
+
+static void transwrite(struct socket *sk, struct dcpeer *peer)
+{
+ if((peer->state != PEER_TRNS) && (peer->state != PEER_SYNC))
+ return;
+ if(peer->transfer == NULL)
+ {
+ freedcpeer(peer);
+ return;
+ }
+ dctransgotdata(peer->transfer, peer);
+}
+
+static void udpread(struct socket *sk, void *data)
+{
+ char *buf, *p, *p2;
+ size_t buflen;
+ char *nick, *filename, *hubname;
+ int size, slots;
+ struct fnetnode *fn, *myfn;
+ struct dchub *hub;
+ struct srchres *sr;
+ wchar_t *wnick, *wfile;
+
+ if((buf = sockgetinbuf(sk, &buflen)) == NULL)
+ return;
+ buf = srealloc(buf, buflen + 1);
+ buf[buflen] = 0;
+ if(!strncmp(buf, "$SR ", 4))
+ {
+ p = buf + 4;
+ nick = p;
+ if((p2 = strchr(p, ' ')) == NULL)
+ {
+ free(buf);
+ return;
+ }
+ *p2 = 0;
+ p = p2 + 1;
+ filename = p;
+ if((p2 = strchr(p, 5)) == NULL)
+ {
+ free(buf);
+ return;
+ }
+ *p2 = 0;
+ p = p2 + 1;
+ if((p2 = strchr(p, ' ')) == NULL)
+ {
+ free(buf);
+ return;
+ }
+ *p2 = 0;
+ size = atoi(p);
+ p = p2 + 1;
+ if((p2 = strchr(p, '/')) == NULL)
+ {
+ free(buf);
+ return;
+ }
+ *p2 = 0;
+ slots = atoi(p);
+ p = p2 + 1;
+ if((p2 = strchr(p, 5)) == NULL)
+ {
+ free(buf);
+ return;
+ }
+ p = p2 + 1;
+ hubname = p;
+ if((p2 = strstr(p, " (")) == NULL)
+ {
+ free(buf);
+ return;
+ }
+ *p2 = 0;
+ if((wnick = icmbstowcs(nick, DCCHARSET)) == NULL)
+ {
+ free(buf);
+ return;
+ }
+ if((wfile = icmbstowcs(filename, DCCHARSET)) == NULL)
+ {
+ free(wnick);
+ free(buf);
+ return;
+ }
+ myfn = NULL;
+ for(fn = fnetnodes; fn != NULL; fn = fn->next)
+ {
+ if((fn->fnet == &dcnet) && ((hub = fn->data) != NULL))
+ {
+ if((hub->nativename != NULL) && !strcmp(hub->nativename, hubname))
+ {
+ if(myfn == NULL)
+ {
+ myfn = fn;
+ } else {
+ myfn = NULL;
+ break;
+ }
+ }
+ }
+ }
+ sr = newsrchres(&dcnet, wfile, wnick);
+ if(sr->peernick != NULL)
+ free(sr->peernick);
+ sr->peernick = swcsdup(wnick);
+ sr->size = size;
+ sr->slots = slots;
+ free(wfile);
+ free(wnick);
+ if(myfn != NULL)
+ getfnetnode(sr->fn = myfn);
+ submitsrchres(sr);
+ freesrchres(sr);
+ }
+ free(buf);
+}
+
+static void hubread(struct socket *sk, struct fnetnode *fn)
+{
+ struct dchub *hub;
+ char *newbuf;
+ size_t datalen;
+ char *p;
+
+ hub = (struct dchub *)fn->data;
+ if((newbuf = sockgetinbuf(sk, &datalen)) == NULL)
+ return;
+ if(hub->inbufdata > 500000) /* Discard possible malicious data */
+ hub->inbufdata = 0;
+ sizebuf2(hub->inbuf, hub->inbufdata + datalen, 1);
+ memcpy(hub->inbuf + hub->inbufdata, newbuf, datalen);
+ free(newbuf);
+ p = hub->inbuf + hub->inbufdata;
+ hub->inbufdata += datalen;
+ while((datalen > 0) && ((p = memchr(p, '|', datalen)) != NULL))
+ {
+ *(p++) = 0;
+ newqcmd(&hub->queue, hub->inbuf);
+ memmove(hub->inbuf, p, hub->inbufdata -= p - hub->inbuf);
+ datalen = hub->inbufdata;
+ p = hub->inbuf;
+ }
+}
+
+static void huberr(struct socket *sk, int err, struct fnetnode *fn)
+{
+ killfnetnode(fn);
+}
+
+static int hubsetnick(struct fnetnode *fn, wchar_t *newnick)
+{
+ struct dchub *hub;
+ char *buf;
+
+ hub = fn->data;
+ if((buf = icwcstombs(newnick, DCCHARSET)) == NULL)
+ return(1);
+ if((strchr(buf, ' ') != NULL) || (strchr(buf, '|') != NULL) || (strchr(buf, '$') != NULL))
+ {
+ free(buf);
+ return(1);
+ }
+ if(hub == NULL) /* Not yet connected */
+ {
+ free(buf);
+ return(0);
+ }
+ if(hub->nativenick != NULL)
+ free(hub->nativenick);
+ hub->nativenick = buf;
+ return(0);
+}
+
+static struct dchub *newdchub(struct fnetnode *fn)
+{
+ struct dchub *new;
+
+ new = smalloc(sizeof(*new));
+ memset(new, 0, sizeof(*new));
+ fn->data = new;
+ if(hubsetnick(fn, fn->mynick))
+ fnetsetnick(fn, L"DoldaConnectUser-IN");
+ /* IN as in Invalid Nick */
+ return(new);
+}
+
+static struct dcpeer *newdcpeer(struct socket *sk)
+{
+ struct dcpeer *new;
+
+ new = smalloc(sizeof(*new));
+ memset(new, 0, sizeof(*new));
+ new->transfer = NULL;
+ getsock(sk);
+ new->sk = sk;
+ new->next = peers;
+ new->prev = NULL;
+ if(peers != NULL)
+ peers->prev = new;
+ peers = new;
+ numdcpeers++;
+ return(new);
+}
+
+static void freedcpeer(struct dcpeer *peer)
+{
+ int i;
+ struct qcommand *qcmd;
+
+ peer->freeing = 1;
+ if(peers == peer)
+ peers = peer->next;
+ if(peer->next != NULL)
+ peer->next->prev = peer->prev;
+ if(peer->prev != NULL)
+ peer->prev->next = peer->next;
+ if(peer->transfer != NULL)
+ {
+ if(peer->transfer->dir == TRNSD_UP)
+ peer->transfer->close = 1;
+ if(peer->transfer->dir == TRNSD_DOWN)
+ resettransfer(peer->transfer);
+ transferdetach(peer->transfer);
+ }
+ if(peer->sk->data == peer)
+ peer->sk->data = NULL;
+ peer->sk->readcb = NULL;
+ peer->sk->writecb = NULL;
+ peer->sk->errcb = NULL;
+ putsock(peer->sk);
+ endcompress(peer);
+ if(peer->supports != NULL)
+ {
+ for(i = 0; peer->supports[i] != NULL; i++)
+ free(peer->supports[i]);
+ free(peer->supports);
+ }
+ if(peer->mbspath != NULL)
+ free(peer->mbspath);
+ if(peer->inbuf != NULL)
+ free(peer->inbuf);
+ if(peer->key != NULL)
+ free(peer->key);
+ if(peer->wcsname != NULL)
+ free(peer->wcsname);
+ if(peer->nativename != NULL)
+ free(peer->nativename);
+ if(peer->fn != NULL)
+ putfnetnode(peer->fn);
+ while((qcmd = ulqcmd(&peer->queue)) != NULL)
+ freeqcmd(qcmd);
+ free(peer);
+ numdcpeers--;
+}
+
+static void hubconnect(struct fnetnode *fn)
+{
+ fn->sk->readcb = (void (*)(struct socket *, void *))hubread;
+ fn->sk->errcb = (void (*)(struct socket *, int, void *))huberr;
+ getfnetnode(fn);
+ fn->data = newdchub(fn);
+ fn->sk->data = fn;
+ return;
+}
+
+static void hubdestroy(struct fnetnode *fn)
+{
+ struct dchub *hub;
+ struct qcommand *qcmd;
+
+ hub = (struct dchub *)fn->data;
+ if(fn->sk != NULL)
+ {
+ if(fn->sk->data == fn)
+ {
+ fn->sk->data = NULL;
+ putfnetnode(fn);
+ }
+ }
+ if(hub == NULL)
+ return;
+ while((qcmd = ulqcmd(&hub->queue)) != NULL)
+ freeqcmd(qcmd);
+ if(hub->nativename != NULL)
+ free(hub->nativename);
+ if(hub->nativenick != NULL)
+ free(hub->nativenick);
+ if(hub->inbuf != NULL)
+ free(hub->inbuf);
+ free(hub);
+}
+
+static wchar_t *dcbasename(wchar_t *filename)
+{
+ wchar_t *ret;
+
+ if((ret = wcsrchr(filename, L'\\')) != NULL)
+ return(ret + 1);
+ return(filename);
+}
+
+static struct transferiface dctransfer =
+{
+ .detach = (void (*)(struct transfer *, void *))dctransdetach,
+ .gotdata = (void (*)(struct transfer *, void *))dctransgotdata,
+ .endofdata = (void (*)(struct transfer *, void *))dctransendofdata,
+ .wantdata = (void (*)(struct transfer *, void *))dcwantdata
+};
+
+static struct fnet dcnet =
+{
+ .name = L"dc",
+ .connect = hubconnect,
+ .destroy = hubdestroy,
+ .setnick = hubsetnick,
+ .reqconn = hubreqconn,
+ .sendchat = hubsendchat,
+ .search = hubsearch,
+ .filebasename = dcbasename
+};
+
+static void peerread(struct socket *sk, struct dcpeer *peer)
+{
+ char *newbuf, *p;
+ size_t datalen;
+
+ if((newbuf = sockgetinbuf(sk, &datalen)) == NULL)
+ return;
+ sizebuf2(peer->inbuf, peer->inbufdata + datalen, 1);
+ memcpy(peer->inbuf + peer->inbufdata, newbuf, datalen);
+ free(newbuf);
+ p = peer->inbuf + peer->inbufdata;
+ peer->inbufdata += datalen;
+ while((datalen > 0) && (p = memchr(p, '|', datalen)) != NULL)
+ {
+ *(p++) = 0;
+ newqcmd(&peer->queue, peer->inbuf);
+ memmove(peer->inbuf, p, peer->inbufdata -= p - peer->inbuf);
+ datalen = peer->inbufdata;
+ p = peer->inbuf;
+ }
+}
+
+static void peererror(struct socket *sk, int err, struct dcpeer *peer)
+{
+ freedcpeer(peer);
+}
+
+static void peerconnect(struct socket *sk, int err, struct fnetnode *fn)
+{
+ struct dcpeer *peer;
+
+ if(err != 0)
+ {
+ putfnetnode(fn);
+ return;
+ }
+ peer = newdcpeer(sk);
+ peer->fn = fn;
+ peer->accepted = 0;
+ sk->readcb = (void (*)(struct socket *, void *))peerread;
+ sk->errcb = (void (*)(struct socket *, int, void *))peererror;
+ sk->data = peer;
+ socksettos(sk, confgetint("fnet", "fnptos"));
+ peerhandleaction(sk, peer, NULL, NULL);
+ putsock(sk);
+}
+
+static void peeraccept(struct socket *sk, struct socket *newsk, void *data)
+{
+ struct dcpeer *peer;
+
+ peer = newdcpeer(newsk);
+ peer->accepted = 1;
+ newsk->readcb = (void (*)(struct socket *, void *))peerread;
+ newsk->errcb = (void (*)(struct socket *, int, void *))peererror;
+ newsk->data = peer;
+ socksettos(newsk, confgetint("fnet", "fnptos"));
+ peerhandleaction(sk, peer, NULL, NULL);
+}
+
+static void updatehmlist(void)
+{
+ int i, lev, ic, ret;
+ struct sharecache *node;
+ char *buf, *buf2, numbuf[32];
+ size_t bufsize, bufdata;
+ int fd, ibuf;
+
+ bufdata = 0;
+ buf = smalloc(bufsize = 65536);
+ node = shareroot->child;
+ lev = 0;
+ while(1)
+ {
+ ic = 0;
+ if((buf2 = icwcstombs(node->name, DCCHARSET)) != NULL)
+ {
+ for(i = 0; i < lev; i++)
+ addtobuf(buf, 9);
+ bufcat(buf, buf2, strlen(buf2));
+ free(buf2);
+ if(node->f.b.type == FILE_REG)
+ {
+ addtobuf(buf, '|');
+ sprintf(numbuf, "%i", node->size);
+ bufcat(buf, numbuf, strlen(numbuf));
+ }
+ addtobuf(buf, 13);
+ addtobuf(buf, 10);
+ } else {
+ ic = 1;
+ }
+ if((node->child != NULL) && !ic)
+ {
+ lev++;
+ node = node->child;
+ } else if(node->next != NULL) {
+ node = node->next;
+ } else {
+ while(node->next == NULL)
+ {
+ lev--;
+ node = node->parent;
+ if(node == shareroot)
+ break;
+ }
+ if(node == shareroot)
+ break;
+ node = node->next;
+ }
+ }
+ if(hmlistname != NULL)
+ {
+ unlink(hmlistname);
+ free(hmlistname);
+ }
+ hmlistname = sstrdup("/tmp/dc-filelist-hm-XXXXXX");
+ if((fd = mkstemp(hmlistname)) < 0)
+ {
+ flog(LOG_WARNING, "could not create HM file list tempfile: %s", strerror(errno));
+ free(hmlistname);
+ hmlistname = NULL;
+ } else {
+ /*
+ * I do not want to implement a good Huffman encoder, and it's not
+ * like Huffman encoding actually yields any impressive results
+ * for DC file lists anyway, so I'll just output a bogus
+ * tree. Implement a good encoder if you want to.
+ */
+ write(fd, "HE3\r\0", 5);
+ write(fd, &bufdata, 4);
+ ibuf = 256;
+ write(fd, &ibuf, 2);
+ ibuf = 8;
+ for(i = 0; i < 256; i++)
+ {
+ write(fd, &i, 1);
+ write(fd, &ibuf, 1);
+ }
+ for(i = 0; i < 256; i++)
+ write(fd, &i, 1);
+ for(buf2 = buf; bufdata > 0;)
+ {
+ if((ret = write(fd, buf2, bufdata)) < 0)
+ {
+ flog(LOG_WARNING, "could not write file list: %s", strerror(errno));
+ break;
+ }
+ bufdata -= ret;
+ buf2 += ret;
+ }
+ close(fd);
+ }
+ free(buf);
+}
+
+static struct xmlent
+{
+ wchar_t c;
+ wchar_t *ent;
+} entities[] = {
+ {L'&', L"&"},
+ {L'\"', L"""},
+/* {L'\'', L"""}, Emulate DC++ escaping by omitting this. */
+ {L'\0', NULL}
+};
+
+static wchar_t *escapexml(wchar_t *src)
+{
+ static wchar_t *buf = NULL;;
+ int ret, c;
+ wchar_t nbuf[32];
+ size_t bufsize, bufdata;
+ struct xmlent *ent;
+
+ if(buf != NULL)
+ free(buf);
+ buf = NULL;
+ bufsize = bufdata = 0;
+ for(; *src != L'\0'; src++)
+ {
+ c = wctob(*src);
+ if((c > 0) && (c < 32))
+ {
+ bufcat(buf, L"&#", 2);
+ ret = swprintf(nbuf, (sizeof(nbuf) / sizeof(*nbuf)), L"%i", c);
+ bufcat(buf, nbuf, ret);
+ addtobuf(buf, L';');
+ } else {
+ for(ent = entities; ent->ent != NULL; ent++)
+ {
+ if(ent->c == *src)
+ {
+ bufcat(buf, ent->ent, wcslen(ent->ent));
+ break;
+ }
+ }
+ if(ent->ent == NULL)
+ addtobuf(buf, *src);
+ }
+ }
+ addtobuf(buf, L'\0');
+ return(buf);
+}
+
+static void updatexmllist(void)
+{
+ int i, fd, lev;
+ FILE *fs;
+ char cidbuf[14], *namebuf;
+ char *hashbuf;
+ struct sharecache *node;
+
+ if(xmllistname != NULL)
+ {
+ unlink(xmllistname);
+ free(xmllistname);
+ }
+ xmllistname = sstrdup("/tmp/dc-filelist-dcxml-XXXXXX");
+ if((fd = mkstemp(xmllistname)) < 0)
+ {
+ flog(LOG_WARNING, "could not create XML file list tempfile: %s", strerror(errno));
+ free(xmllistname);
+ xmllistname = NULL;
+ return;
+ }
+ if((fs = fdopen(fd, "w")) == NULL)
+ {
+ flog(LOG_WARNING, "could not fdopen XML list fd %i: %s", fd, strerror(errno));
+ unlink(xmllistname);
+ free(xmllistname);
+ xmllistname = NULL;
+ close(fd);
+ return;
+ }
+ fprintf(fs, "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>\r\n");
+ for(i = 0; i < sizeof(cidbuf) - 1; i++)
+ cidbuf[i] = (rand() % ('Z' - 'A' + 1)) + 'A';
+ cidbuf[i] = 0;
+ fprintf(fs, "<FileListing Version=\"1\" CID=\"%s\" Base=\"/\" Generator=\"%s\">\r\n", cidbuf, DCIDFULL);
+
+ node = shareroot->child;
+ lev = 0;
+ while(1)
+ {
+ if((namebuf = icswcstombs(escapexml(node->name), "UTF-8", NULL)) != NULL)
+ {
+ for(i = 0; i < lev; i++)
+ fputc('\t', fs);
+ if(node->child != NULL)
+ {
+ fprintf(fs, "<Directory Name=\"%s\">\r\n", namebuf);
+ node = node->child;
+ lev++;
+ continue;
+ } else {
+ fprintf(fs, "<File Name=\"%s\" Size=\"%i\"", namebuf, node->size);
+ if(node->f.b.hastth)
+ {
+ hashbuf = base32encode(node->hashtth, 24);
+ fprintf(fs, " TTH=\"%.39s\"", hashbuf);
+ free(hashbuf);
+ }
+ fprintf(fs, "/>\r\n");
+ }
+ while(node->next == NULL)
+ {
+ node = node->parent;
+ if(node == shareroot)
+ {
+ break;
+ } else {
+ lev--;
+ for(i = 0; i < lev; i++)
+ fputc('\t', fs);
+ fprintf(fs, "</Directory>\r\n");
+ }
+ }
+ if(node == shareroot)
+ break;
+ node = node->next;
+ }
+ }
+
+#ifdef DCPP_MASQUERADE
+ fprintf(fs, "</FileListing>");
+#else
+ fprintf(fs, "</FileListing>\r\n");
+#endif
+ fclose(fs);
+}
+
+static void updatexmlbz2list(void)
+{
+ int err, fd;
+ FILE *in;
+ FILE *real;
+ BZFILE *out;
+ char buf[1024];
+ size_t bufdata;
+
+ if(xmllistname == NULL)
+ return;
+ if((in = fopen(xmllistname, "r")) == NULL)
+ {
+ flog(LOG_WARNING, "could not open XML file list for bzipping: %s", strerror(errno));
+ return;
+ }
+ if(xmlbz2listname != NULL)
+ {
+ unlink(xmlbz2listname);
+ free(xmlbz2listname);
+ }
+ xmlbz2listname = sstrdup("/tmp/dc-filelist-dcxmlbz2-XXXXXX");
+ if((fd = mkstemp(xmlbz2listname)) < 0)
+ {
+ flog(LOG_WARNING, "could not create bzipped XML file list tempfile: %s", strerror(errno));
+ free(xmlbz2listname);
+ xmlbz2listname = NULL;
+ fclose(in);
+ return;
+ }
+ if((real = fdopen(fd, "w")) == NULL)
+ {
+ flog(LOG_WARNING, "could not fdopen bzipped XML list fd %i: %s", fd, strerror(errno));
+ close(fd);
+ unlink(xmlbz2listname);
+ free(xmlbz2listname);
+ xmlbz2listname = NULL;
+ fclose(in);
+ return;
+ }
+ out = BZ2_bzWriteOpen(&err, real, 9, 0, 0);
+ if(err != BZ_OK)
+ {
+ flog(LOG_WARNING, "could not open bzip2 stream from XML list");
+ fclose(real);
+ unlink(xmlbz2listname);
+ free(xmlbz2listname);
+ xmlbz2listname = NULL;
+ fclose(in);
+ return;
+ }
+ while(!feof(in))
+ {
+ bufdata = fread(buf, 1, sizeof(buf), in);
+ BZ2_bzWrite(&err, out, buf, bufdata);
+ }
+ fclose(in);
+ BZ2_bzWriteClose(&err, out, 0, NULL, NULL);
+ fclose(real);
+}
+
+static int shareupdate(unsigned long long uusharesize, void *data)
+{
+ updatehmlist();
+ updatexmllist();
+ updatexmlbz2list();
+ return(0);
+}
+
+static void dispatchcommand(struct qcommand *qcmd, struct command *cmdlist, struct socket *sk, void *data)
+{
+ char *p;
+ struct command *cmd;
+
+ if((p = strchr(qcmd->string, ' ')) != NULL)
+ *(p++) = 0;
+ for(cmd = cmdlist; cmd->handler != NULL; cmd++)
+ {
+ if(!strcmp(cmd->name, qcmd->string))
+ break;
+ }
+ if(cmd->handler != NULL)
+ cmd->handler(sk, data, qcmd->string, p);
+/*
+ else
+ flog(LOG_DEBUG, "Unimplemented DC command: %s \"%s\"", qcmd->string, p?p:"noargs");
+*/
+}
+
+static int run(void)
+{
+ struct fnetnode *fn, *nextfn;
+ struct dchub *hub;
+ struct dcpeer *peer, *nextpeer;
+ struct qcommand *qcmd;
+ int ret;
+
+ ret = 0;
+ for(fn = fnetnodes; fn != NULL; fn = nextfn)
+ {
+ nextfn = fn->next;
+ if(fn->fnet != &dcnet)
+ continue;
+ if(fn->data == NULL)
+ continue;
+ hub = (struct dchub *)fn->data;
+ if((qcmd = ulqcmd(&hub->queue)) != NULL)
+ {
+ if(*qcmd->string == '$')
+ {
+ if((fn->sk != NULL) && (fn->sk->state == SOCK_EST))
+ dispatchcommand(qcmd, hubcmds, fn->sk, fn);
+ } else if(*qcmd->string != 0) {
+ hubrecvchat(fn->sk, fn, NULL, qcmd->string);
+ }
+ freeqcmd(qcmd);
+ ret = 1;
+ break;
+ }
+ }
+ for(peer = peers; peer != NULL; peer = nextpeer)
+ {
+ nextpeer = peer->next;
+ if((qcmd = ulqcmd(&peer->queue)) != NULL)
+ {
+ if(*qcmd->string == '$')
+ dispatchcommand(qcmd, peercmds, peer->sk, peer);
+ freeqcmd(qcmd);
+ ret = 1;
+ break;
+ }
+ }
+ return(ret);
+}
+
+static void preinit(int hup)
+{
+ if(hup)
+ return;
+ regfnet(&dcnet);
+}
+
+static int updateudpport(struct configvar *var, void *uudata)
+{
+ struct sockaddr_in addr;
+ struct socket *newsock;
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sin_family = AF_INET;
+ addr.sin_port = htons(var->val.num);
+ if((newsock = netcsdgram((struct sockaddr *)&addr, sizeof(addr))) == NULL)
+ {
+ flog(LOG_WARNING, "could not create new DC UDP socket, reverting to old: %s", strerror(errno));
+ return(0);
+ }
+ newsock->readcb = udpread;
+ if(udpsock != NULL)
+ putsock(udpsock);
+ udpsock = newsock;
+ return(0);
+}
+
+static int updatetcpport(struct configvar *var, void *uudata)
+{
+ struct sockaddr_in addr;
+ struct socket *newsock;
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sin_family = AF_INET;
+ addr.sin_port = htons(var->val.num);
+ if((newsock = netcslisten(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), peeraccept, NULL)) == NULL)
+ flog(LOG_INFO, "could not listen to a remote address, going into passive mode");
+ if(tcpsock != NULL)
+ putsock(tcpsock);
+ tcpsock = newsock;
+ return(0);
+}
+
+static int init(int hup)
+{
+ struct sockaddr_in addr;
+
+ if(!hup)
+ {
+ GCBREG(sharechangecb, shareupdate, NULL);
+ if(udpsock != NULL)
+ putsock(udpsock);
+ if(tcpsock != NULL)
+ putsock(tcpsock);
+ addr.sin_family = AF_INET;
+ memset(&addr.sin_addr, 0, sizeof(addr.sin_addr));
+ addr.sin_port = htons(confgetint("dc", "udpport"));
+ if((udpsock = netcsdgram((struct sockaddr *)&addr, sizeof(addr))) == NULL)
+ {
+ flog(LOG_CRIT, "could not create DC UDP socket: %s", strerror(errno));
+ return(1);
+ }
+ udpsock->readcb = udpread;
+ addr.sin_port = htons(confgetint("dc", "tcpport"));
+ if((tcpsock = netcslisten(SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr), peeraccept, NULL)) == NULL)
+ flog(LOG_INFO, "could not listen to a remote address, going into passive mode");
+ CBREG(confgetvar("dc", "udpport"), conf_update, updateudpport, NULL, NULL);
+ CBREG(confgetvar("dc", "tcpport"), conf_update, updatetcpport, NULL, NULL);
+ CBREG(confgetvar("net", "mode"), conf_update, updatetcpport, NULL, NULL);
+ }
+ return(0);
+}
+
+static void terminate(void)
+{
+ if(hmlistname != NULL)
+ {
+ unlink(hmlistname);
+ free(hmlistname);
+ }
+ if(xmllistname != NULL)
+ {
+ unlink(xmllistname);
+ free(xmllistname);
+ }
+ if(xmlbz2listname != NULL)
+ {
+ unlink(xmlbz2listname);
+ free(xmlbz2listname);
+ }
+}
+
+static struct configvar myvars[] =
+{
+ {CONF_VAR_STRING, "desc", {.str = L""}},
+ {CONF_VAR_STRING, "speedstring", {.str = L"LAN(T1)"}},
+ {CONF_VAR_STRING, "email", {.str = L"spam@spam.org"}},
+ {CONF_VAR_INT, "udpport", {.num = 0}},
+ {CONF_VAR_INT, "tcpport", {.num = 0}},
+ {CONF_VAR_END}
+};
+
+static struct module me =
+{
+ .conf =
+ {
+ .vars = myvars
+ },
+ .preinit = preinit,
+ .init = init,
+ .run = run,
+ .terminate = terminate,
+ .name = "dc"
+};
+
+MODULE(me)