| 1 | /* |
1 | /* |
| 2 | CrossFire, A Multiplayer game for X-windows |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
| 3 | |
3 | * |
| 4 | Copyright (C) 2002-2003 Mark Wedel & The Crossfire Development Team |
4 | * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
| 5 | Copyright (C) 1992 Frank Tore Johansen |
5 | * |
| 6 | |
6 | * Deliantra is free software: you can redistribute it and/or modify it under |
| 7 | This program is free software; you can redistribute it and/or modify |
|
|
| 8 | it under the terms of the GNU General Public License as published by |
7 | * the terms of the Affero GNU General Public License as published by the |
| 9 | the Free Software Foundation; either version 2 of the License, or |
8 | * Free Software Foundation, either version 3 of the License, or (at your |
| 10 | (at your option) any later version. |
9 | * option) any later version. |
| 11 | |
10 | * |
| 12 | This program is distributed in the hope that it will be useful, |
11 | * This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
14 | * GNU General Public License for more details. |
| 16 | |
15 | * |
| 17 | You should have received a copy of the GNU General Public License |
16 | * You should have received a copy of the Affero GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
17 | * and the GNU General Public License along with this program. If not, see |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
18 | * <http://www.gnu.org/licenses/>. |
| 20 | |
19 | * |
| 21 | The author can be reached via e-mail to <crossfire@schmorp.de> |
20 | * The authors can be reached via e-mail to <support@deliantra.net> |
| 22 | */ |
21 | */ |
| 23 | |
22 | |
| 24 | /** |
23 | /** |
| 25 | * \file |
24 | * \file |
| 26 | * Main client/server loops. |
25 | * Main client/server loops. |
| 27 | * |
26 | * |
| 28 | * \date 2003-12-02 |
27 | * \date 2003-12-02 |
| 29 | * |
28 | * |
| 30 | * loop.c mainly deals with initialization and higher level socket |
29 | * loop.c mainly deals with initialization and higher level socket |
| 31 | * maintenance (checking for lost connections and if data has arrived.) |
30 | * maintanance (checking for lost connections and if data has arrived.) |
| 32 | * The reading of data is handled in ericserver.c |
|
|
| 33 | */ |
31 | */ |
| 34 | |
|
|
| 35 | |
32 | |
| 36 | #include <global.h> |
33 | #include <global.h> |
| 37 | #include <sproto.h> |
34 | #include <sproto.h> |
| 38 | #include <sockproto.h> |
35 | #include <sockproto.h> |
| 39 | |
36 | |
| … | |
… | |
| 41 | #include <sys/time.h> |
38 | #include <sys/time.h> |
| 42 | #include <sys/socket.h> |
39 | #include <sys/socket.h> |
| 43 | #include <netinet/in.h> |
40 | #include <netinet/in.h> |
| 44 | #include <netdb.h> |
41 | #include <netdb.h> |
| 45 | |
42 | |
| 46 | #ifdef HAVE_UNISTD_H |
|
|
| 47 | # include <unistd.h> |
43 | #include <unistd.h> |
| 48 | #endif |
|
|
| 49 | |
|
|
| 50 | #ifdef HAVE_ARPA_INET_H |
|
|
| 51 | # include <arpa/inet.h> |
44 | #include <arpa/inet.h> |
| 52 | #endif |
|
|
| 53 | |
45 | |
| 54 | #include <loader.h> |
46 | #define BG_SCRUB_RATE 4 // how often to send a face in the background |
| 55 | #include <newserver.h> |
|
|
| 56 | |
47 | |
| 57 | /***************************************************************************** |
48 | #define MAX_QUEUE_DEPTH 50 |
| 58 | * Start of command dispatch area. |
49 | #define MAX_QUEUE_BACKLOG 3. |
| 59 | * The commands here are protocol commands. |
|
|
| 60 | ****************************************************************************/ |
|
|
| 61 | |
50 | |
| 62 | /* Either keep this near the start or end of the file so it is |
|
|
| 63 | * at least reasonablye easy to find. |
|
|
| 64 | * There are really 2 commands - those which are sent/received |
|
|
| 65 | * before player joins, and those happen after the player has joined. |
|
|
| 66 | * As such, we have function types that might be called, so |
|
|
| 67 | * we end up having 2 tables. |
|
|
| 68 | */ |
|
|
| 69 | |
|
|
| 70 | typedef void (*func_uint8_int_ns) (char *, int, client_socket *); |
|
|
| 71 | |
|
|
| 72 | struct NsCmdMapping |
|
|
| 73 | { |
|
|
| 74 | const char *cmdname; |
|
|
| 75 | func_uint8_int_ns cmdproc; |
|
|
| 76 | uint8 flag; |
|
|
| 77 | }; |
|
|
| 78 | |
|
|
| 79 | typedef void (*func_uint8_int_pl) (char *, int, player *); |
|
|
| 80 | struct PlCmdMapping |
|
|
| 81 | { |
|
|
| 82 | const char *cmdname; |
|
|
| 83 | func_uint8_int_pl cmdproc; |
|
|
| 84 | uint8 flag; |
|
|
| 85 | }; |
|
|
| 86 | |
|
|
| 87 | /** |
|
|
| 88 | * Dispatch table for the server. |
|
|
| 89 | * |
|
|
| 90 | * CmdMapping is the dispatch table for the server, used in HandleClient, |
|
|
| 91 | * which gets called when the client has input. All commands called here |
|
|
| 92 | * use the same parameter form (char* data, int len, int clientnum. |
|
|
| 93 | * We do implicit casts, because the data that is being passed is |
|
|
| 94 | * unsigned (pretty much needs to be for binary data), however, most |
|
|
| 95 | * of these treat it only as strings, so it makes things easier |
|
|
| 96 | * to cast it here instead of a bunch of times in the function itself. |
|
|
| 97 | * flag is 1 if the player must be in the playing state to issue the |
|
|
| 98 | * command, 0 if they can issue it at any time. |
|
|
| 99 | */ |
|
|
| 100 | static struct PlCmdMapping plcommands[] = { |
|
|
| 101 | {"examine", ExamineCmd, 1}, |
|
|
| 102 | {"apply", ApplyCmd, 1}, |
|
|
| 103 | {"move", MoveCmd, 1}, |
|
|
| 104 | {"reply", ReplyCmd, 0}, |
|
|
| 105 | {"command", PlayerCmd, 1}, |
|
|
| 106 | {"ncom", (func_uint8_int_pl) NewPlayerCmd, 1}, |
|
|
| 107 | {"lookat", LookAt, 1}, |
|
|
| 108 | {"lock", (func_uint8_int_pl) LockItem, 1}, |
|
|
| 109 | {"mark", (func_uint8_int_pl) MarkItem, 1}, |
|
|
| 110 | {"mapredraw", MapRedrawCmd, 0}, /* Added: phil */ |
|
|
| 111 | {"mapinfo", MapInfoCmd, 2}, /* CF+ */ |
|
|
| 112 | {"ext", ExtCmd, 2}, /* CF+ */ |
|
|
| 113 | { 0 } /* terminator */ |
|
|
| 114 | }; |
|
|
| 115 | |
|
|
| 116 | /** Face-related commands */ |
|
|
| 117 | static struct NsCmdMapping nscommands[] = { |
|
|
| 118 | {"addme", AddMeCmd, 2}, |
|
|
| 119 | {"askface", SendFaceCmd}, /* Added: phil */ |
|
|
| 120 | {"requestinfo", RequestInfo}, |
|
|
| 121 | {"setfacemode", SetFaceMode, 2}, |
|
|
| 122 | {"setsound", SetSound, 2}, |
|
|
| 123 | {"setup", SetUp, 2}, |
|
|
| 124 | {"version", VersionCmd, 2}, |
|
|
| 125 | {"toggleextendedinfos", ToggleExtendedInfos, 2}, /*Added: tchize */ |
|
|
| 126 | {"toggleextendedtext", ToggleExtendedText, 2}, /*Added: tchize */ |
|
|
| 127 | {"asksmooth", AskSmooth}, /*Added: tchize (smoothing technologies) */ |
|
|
| 128 | { 0 } /* terminator (I, II & III) */ |
|
|
| 129 | }; |
|
|
| 130 | |
|
|
| 131 | /** |
|
|
| 132 | * RequestInfo is sort of a meta command. There is some specific |
|
|
| 133 | * request of information, but we call other functions to provide |
|
|
| 134 | * that information. |
|
|
| 135 | */ |
|
|
| 136 | void |
51 | void |
| 137 | RequestInfo (char *buf, int len, client_socket * ns) |
52 | client::reset_state () |
| 138 | { |
53 | { |
| 139 | char *params = NULL, *cp; |
54 | if (!pl) |
|
|
55 | return; |
| 140 | |
56 | |
| 141 | /* No match */ |
57 | pl->run_on = 0; |
| 142 | char bigbuf[MAX_BUF]; |
58 | pl->fire_on = 0; |
| 143 | int slen; |
59 | } |
| 144 | |
60 | |
| 145 | /* Set up replyinfo before we modify any of the buffers - this is used |
61 | void |
| 146 | * if we don't find a match. |
62 | client::queue_command (packet_type *handler, char *data, int datalen) |
| 147 | */ |
63 | { |
| 148 | strcpy (bigbuf, "replyinfo "); |
64 | tstamp stamp = NOW; |
| 149 | slen = strlen (bigbuf); |
|
|
| 150 | safe_strcat (bigbuf, buf, &slen, MAX_BUF); |
|
|
| 151 | |
65 | |
| 152 | /* find the first space, make it null, and update the |
66 | if (cmd_queue.size () >= MAX_QUEUE_DEPTH) |
| 153 | * params pointer. |
|
|
| 154 | */ |
|
|
| 155 | for (cp = buf; *cp != '\0'; cp++) |
|
|
| 156 | if (*cp == ' ') |
|
|
| 157 | { |
67 | { |
| 158 | *cp = '\0'; |
68 | reset_state (); |
| 159 | params = cp + 1; |
69 | send_packet_printf ("drawinfo %d command queue overflow, ignoring.", NDI_RED); |
| 160 | break; |
|
|
| 161 | } |
70 | } |
| 162 | |
|
|
| 163 | if (!strcmp (buf, "image_info")) |
|
|
| 164 | send_image_info (ns, params); |
|
|
| 165 | else if (!strcmp (buf, "image_sums")) |
|
|
| 166 | send_image_sums (ns, params); |
|
|
| 167 | else if (!strcmp (buf, "skill_info")) |
|
|
| 168 | send_skill_info (ns, params); |
|
|
| 169 | else if (!strcmp (buf, "spell_paths")) |
|
|
| 170 | send_spell_paths (ns, params); |
|
|
| 171 | else |
71 | else |
| 172 | ns->send_packet (bigbuf, len); |
72 | { |
| 173 | } |
73 | cmd_queue.resize (cmd_queue.size () + 1); |
| 174 | |
74 | command &cmd = cmd_queue.back (); |
| 175 | /** |
75 | cmd.stamp = stamp; |
| 176 | * Handle client input. |
76 | cmd.handler = handler; |
| 177 | * |
77 | cmd.data = salloc<char> (datalen + 1, data); |
| 178 | * HandleClient is actually not named really well - we only get here once |
78 | cmd.datalen = datalen; |
| 179 | * there is input, so we don't do exception or other stuff here. |
|
|
| 180 | * sock is the output socket information. pl is the player associated |
|
|
| 181 | * with this socket, null if no player (one of the init_sockets for just |
|
|
| 182 | * starting a connection) |
|
|
| 183 | */ |
|
|
| 184 | |
|
|
| 185 | void |
|
|
| 186 | HandleClient (client_socket *ns, player *pl) |
|
|
| 187 | { |
|
|
| 188 | /* Loop through this - maybe we have several complete packets here. */ |
|
|
| 189 | // limit to a few commands only, though, as to not monopolise the server |
|
|
| 190 | for (int repeat = 16; repeat--;) |
|
|
| 191 | { |
79 | } |
| 192 | /* If it is a player, and they don't have any speed left, we |
80 | } |
| 193 | * return, and will read in the data when they do have time. |
|
|
| 194 | */ |
|
|
| 195 | if (pl && pl->state == ST_PLAYING && pl->ob && pl->ob->speed_left < 0) |
|
|
| 196 | return; |
|
|
| 197 | |
81 | |
| 198 | int pkt_len = ns->read_packet (); |
82 | bool |
|
|
83 | client::handle_command () |
|
|
84 | { |
|
|
85 | if (!cmd_queue.empty () |
|
|
86 | && state == ST_PLAYING |
|
|
87 | && pl->ob->speed_left > 0.f) |
|
|
88 | { |
|
|
89 | command &cmd = cmd_queue.front (); |
| 199 | |
90 | |
| 200 | if (pkt_len < 0) |
91 | if (cmd.stamp + MAX_QUEUE_BACKLOG < NOW) |
| 201 | { |
92 | { |
| 202 | LOG (llevError, "read error on player %s\n", &pl->ob->name); |
93 | reset_state (); // the command might actually reset some movement state etc. |
| 203 | /* Caller will take care of cleaning this up */ |
|
|
| 204 | ns->status = Ns_Dead; |
|
|
| 205 | return; |
|
|
| 206 | } |
|
|
| 207 | else if (pkt_len == 0) |
|
|
| 208 | /* Still dont have a full packet */ |
|
|
| 209 | return; |
|
|
| 210 | |
94 | |
| 211 | /* First, break out beginning word. There are at least |
95 | if (pl) |
| 212 | * a few commands that do not have any paremeters. If |
96 | pl->failmsg ( |
| 213 | * we get such a command, don't worry about trying |
97 | "Cannot keep up with your commands, ignoring them! " |
| 214 | * to break it up. |
98 | "H<Your character cannot keep up with the instructions you give G<him|her>. " |
| 215 | */ |
99 | "Try issuing commands slower, or, if G<he|she> is incapacitated (paralyzed and so on), " |
| 216 | int datalen; |
100 | "wait till your character can act again.\n\nIf G<he|she> is permanently stuck, then " |
| 217 | char *data = strchr ((char *)ns->inbuf + 2, ' '); |
101 | "try the B<suicide> command (or use B<chat> to ask somebody to B<invite> you out).>" |
| 218 | |
102 | ); |
| 219 | if (data) |
|
|
| 220 | { |
|
|
| 221 | *data++ = 0; |
|
|
| 222 | datalen = pkt_len - (data - (char *)ns->inbuf); |
|
|
| 223 | } |
103 | } |
| 224 | else |
104 | else |
|
|
105 | execute (cmd.handler, cmd.data, cmd.datalen); |
|
|
106 | |
|
|
107 | sfree<char> (cmd.data, cmd.datalen + 1); |
|
|
108 | cmd_queue.pop_front (); |
|
|
109 | return true; |
|
|
110 | } |
|
|
111 | else |
|
|
112 | return false; |
|
|
113 | } |
|
|
114 | |
|
|
115 | void |
|
|
116 | client::tick () |
|
|
117 | { |
|
|
118 | if (!pl || destroyed ()) |
|
|
119 | return; |
|
|
120 | |
|
|
121 | pl->dirty = true; |
|
|
122 | |
|
|
123 | /* Update the players stats once per tick. More efficient than |
|
|
124 | * sending them whenever they change, and probably just as useful |
|
|
125 | */ |
|
|
126 | pl->need_updated_stats (); |
|
|
127 | esrv_update_stats (pl); |
|
|
128 | |
|
|
129 | if (pl->ns->update_spells) |
|
|
130 | esrv_update_spells (pl); |
|
|
131 | |
|
|
132 | sint32 weight = pl->ob->client_weight (); |
|
|
133 | |
|
|
134 | if (last_weight != weight) |
|
|
135 | { |
|
|
136 | pl->ob->update_stats (); |
|
|
137 | esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
|
|
138 | } |
|
|
139 | |
|
|
140 | draw_client_map (pl); |
|
|
141 | |
|
|
142 | if (update_look) |
|
|
143 | esrv_draw_look (pl); |
|
|
144 | |
|
|
145 | mapinfo_queue_run (); |
|
|
146 | |
|
|
147 | #if HAVE_TCP_INFO |
|
|
148 | // check time of last ack, and, if too old, kill connection |
|
|
149 | socklen_t len = sizeof (tcpi); |
|
|
150 | |
|
|
151 | if (!getsockopt (fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
|
|
152 | { |
|
|
153 | if (tcpi.tcpi_snd_mss) |
|
|
154 | mss = tcpi.tcpi_snd_mss; |
|
|
155 | |
|
|
156 | #if 0 |
|
|
157 | fprintf (stderr, "uack %d ack %d lost %d ret %d fack %d sst %d cwnd %d mss %d pmtu %d advmss %d EXC %d\n", |
|
|
158 | tcpi.tcpi_unacked, |
|
|
159 | tcpi.tcpi_sacked, |
|
|
160 | tcpi.tcpi_lost, |
|
|
161 | tcpi.tcpi_retrans, |
|
|
162 | tcpi.tcpi_fackets, |
|
|
163 | tcpi.tcpi_snd_ssthresh, tcpi.tcpi_snd_cwnd, tcpi.tcpi_advmss, tcpi.tcpi_pmtu, tcpi.tcpi_advmss, |
|
|
164 | |
|
|
165 | tcpi.tcpi_snd_cwnd - (tcpi.tcpi_unacked - tcpi.tcpi_sacked)); |
|
|
166 | #endif |
|
|
167 | |
|
|
168 | // fast-time-out a player by checking for missing acks |
|
|
169 | // do this only when player is active |
|
|
170 | if (pl && pl->active |
|
|
171 | && tcpi.tcpi_last_ack_recv > int (socket_timeout * 1000)) |
| 225 | { |
172 | { |
| 226 | data = (char *)ns->inbuf + 2; // better read garbage than segfault |
173 | send_msg (NDI_RED | NDI_REPLY, "connection-timeout", "safety disconnect due to tcp/ip timeout (no packets received)"); |
| 227 | datalen = 0; |
174 | write_outputbuffer (); |
|
|
175 | |
|
|
176 | LOG (llevDebug, "connection on fd %d closed due to ack timeout (%u/%u/%u)\n", fd, |
|
|
177 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
|
|
178 | destroy (); |
| 228 | } |
179 | } |
|
|
180 | } |
|
|
181 | #endif |
| 229 | |
182 | |
| 230 | ns->inbuf [pkt_len] = 0; /* Terminate buffer - useful for string data */ |
183 | // limit budget surplus/deficit by one mss, add per-tick budget |
|
|
184 | rate_avail = min (rate_avail, mss) + max_rate; |
| 231 | |
185 | |
| 232 | for (int i = 0; nscommands[i].cmdname; i++) |
186 | int max_send = rate_avail; |
|
|
187 | |
|
|
188 | #if HAVE_TCP_INFO |
|
|
189 | // further restrict the available bandwidth by the excess bandwidth available |
|
|
190 | min_it (max_send, (tcpi.tcpi_snd_cwnd - tcpi.tcpi_unacked + tcpi.tcpi_sacked) * mss); |
|
|
191 | #endif |
|
|
192 | |
|
|
193 | // round to next-lowest mss |
|
|
194 | max_send -= max_send % mss; |
|
|
195 | |
|
|
196 | if (ixface.empty ()) |
|
|
197 | { |
|
|
198 | // regularly send a new face when queue is empty |
|
|
199 | if (bg_scrub && !--bg_scrub) |
|
|
200 | while (scrub_idx < faces.size () - 1) |
|
|
201 | { |
|
|
202 | ++scrub_idx; |
|
|
203 | |
|
|
204 | if (!faces_sent [scrub_idx]) |
|
|
205 | if (faceinfo *f = face_info (scrub_idx)) |
|
|
206 | if (f->type == FT_FACE || f->type == FT_SOUND) // only scrub faces and sounds for now |
|
|
207 | { |
|
|
208 | send_face (scrub_idx, -120); |
|
|
209 | flush_fx (); |
|
|
210 | |
|
|
211 | bg_scrub = 1; // send up to one fx per tick, unless an image was requested |
|
|
212 | break; |
|
|
213 | } |
|
|
214 | } |
|
|
215 | } |
|
|
216 | else |
|
|
217 | { |
|
|
218 | bg_scrub = BG_SCRUB_RATE; |
|
|
219 | |
|
|
220 | for (;;) |
| 233 | { |
221 | { |
| 234 | if (!strcmp ((char *)ns->inbuf + 2, nscommands[i].cmdname)) |
222 | int avail = max_send - outputbuffer_len (); |
|
|
223 | |
|
|
224 | if (avail <= 0) |
|
|
225 | break; |
|
|
226 | |
|
|
227 | ixsend &ix = ixface.back (); |
|
|
228 | |
|
|
229 | if (facedata *d = face_data (ix.idx, faceset)) |
| 235 | { |
230 | { |
| 236 | nscommands[i].cmdproc (data, datalen, ns); |
231 | // estimate the packet header overhead "ix " + idx + (new)ofs |
| 237 | ns->skip_packet (pkt_len); |
232 | int pktlen = 3 + ber32::encoded_size (ix.idx) + ber32::encoded_size (ix.ofs); |
| 238 | //D// not doing this causes random memory corruption |
233 | int chunk = min (avail - packet::hdrlen, MAXSOCKBUF) - pktlen; |
| 239 | if (nscommands[i].flag & 2) |
234 | |
| 240 | goto next_packet; |
235 | // only transfer something if the amount of data transferred |
|
|
236 | // has a healthy relation to the header overhead |
|
|
237 | if (chunk < 64) |
| 241 | return; |
238 | break; |
|
|
239 | |
|
|
240 | chunk = min (chunk, (int)ix.ofs); |
|
|
241 | |
|
|
242 | ix.ofs -= chunk; |
|
|
243 | |
|
|
244 | //fprintf (stderr, "i%dx %6d: %5d+%4d (%4d)\n", fxix, ix.idx,ix.ofs,chunk, ixface.size());//D |
|
|
245 | |
|
|
246 | packet sl ("ix"); |
|
|
247 | |
|
|
248 | sl << ber32 (ix.idx) |
|
|
249 | << ber32 (ix.ofs) |
|
|
250 | << data (d->data + ix.ofs, chunk); |
|
|
251 | |
|
|
252 | send_packet (sl); |
|
|
253 | } |
|
|
254 | else |
|
|
255 | ix.ofs = 0; |
|
|
256 | |
|
|
257 | if (!ix.ofs) |
|
|
258 | { |
|
|
259 | ixface.pop_back (); |
|
|
260 | |
|
|
261 | if (ixface.empty ()) |
|
|
262 | break; |
| 242 | } |
263 | } |
| 243 | } |
264 | } |
| 244 | |
|
|
| 245 | /* Player must be in the playing state or the flag on the |
|
|
| 246 | * the command must be zero for the user to use the command - |
|
|
| 247 | * otherwise, a player cam save, be in the play_again state, and |
|
|
| 248 | * the map they were on gets swapped out, yet things that try to look |
|
|
| 249 | * at the map causes a crash. If the command is valid, but |
|
|
| 250 | * one they can't use, we still swallow it up. |
|
|
| 251 | */ |
|
|
| 252 | if (pl) |
|
|
| 253 | for (int i = 0; plcommands[i].cmdname; i++) |
|
|
| 254 | { |
|
|
| 255 | if (!strcmp ((char *)ns->inbuf + 2, plcommands[i].cmdname)) |
|
|
| 256 | { |
|
|
| 257 | if (pl->state == ST_PLAYING || !(plcommands[i].flag & 1)) |
|
|
| 258 | plcommands[i].cmdproc ((char *) data, datalen, pl); |
|
|
| 259 | |
|
|
| 260 | ns->skip_packet (pkt_len); |
|
|
| 261 | //D// not doing this causes random memory corruption |
|
|
| 262 | if (plcommands[i].flag & 2) |
|
|
| 263 | goto next_packet; |
|
|
| 264 | |
|
|
| 265 | return; |
|
|
| 266 | } |
|
|
| 267 | } |
|
|
| 268 | |
|
|
| 269 | /* If we get here, we didn't find a valid command. Logging |
|
|
| 270 | * this might be questionable, because a broken client/malicious |
|
|
| 271 | * user could certainly send a whole bunch of invalid commands. |
|
|
| 272 | */ |
|
|
| 273 | LOG (llevDebug, "Bad command from client (%s)\n", ns->inbuf + 2); |
|
|
| 274 | ns->skip_packet (pkt_len); |
|
|
| 275 | next_packet: |
|
|
| 276 | ; |
|
|
| 277 | } |
|
|
| 278 | } |
|
|
| 279 | |
|
|
| 280 | |
|
|
| 281 | /***************************************************************************** |
|
|
| 282 | * |
|
|
| 283 | * Low level socket looping - select calls and watchdog udp packet |
|
|
| 284 | * sending. |
|
|
| 285 | * |
|
|
| 286 | ******************************************************************************/ |
|
|
| 287 | |
|
|
| 288 | #ifdef WATCHDOG |
|
|
| 289 | |
|
|
| 290 | /** |
|
|
| 291 | * Tell watchdog that we are still alive |
|
|
| 292 | * |
|
|
| 293 | * I put the function here since we should hopefully already be getting |
|
|
| 294 | * all the needed include files for socket support |
|
|
| 295 | */ |
|
|
| 296 | |
|
|
| 297 | void |
|
|
| 298 | watchdog (void) |
|
|
| 299 | { |
|
|
| 300 | static int fd = -1; |
|
|
| 301 | static struct sockaddr_in insock; |
|
|
| 302 | |
|
|
| 303 | if (fd == -1) |
|
|
| 304 | { |
265 | } |
| 305 | struct protoent *protoent; |
|
|
| 306 | |
266 | |
| 307 | if ((protoent = getprotobyname ("udp")) == NULL || (fd = socket (PF_INET, SOCK_DGRAM, protoent->p_proto)) == -1) |
267 | rate_avail -= outputbuffer_len (); |
| 308 | { |
|
|
| 309 | return; |
|
|
| 310 | } |
|
|
| 311 | insock.sin_family = AF_INET; |
|
|
| 312 | insock.sin_port = htons ((unsigned short) 13325); |
|
|
| 313 | insock.sin_addr.s_addr = inet_addr ("127.0.0.1"); |
|
|
| 314 | } |
|
|
| 315 | sendto (fd, (void *) &fd, 1, 0, (struct sockaddr *) &insock, sizeof (insock)); |
|
|
| 316 | } |
268 | } |
| 317 | #endif |
|
|
| 318 | |
269 | |
| 319 | void |
270 | void |
| 320 | flush_sockets (void) |
271 | client::flush_sockets () |
| 321 | { |
272 | { |
| 322 | player *pl; |
|
|
| 323 | |
|
|
| 324 | for (pl = first_player; pl != NULL; pl = pl->next) |
|
|
| 325 | if (pl->socket->status != Ns_Dead) |
|
|
| 326 | Socket_Flush (pl->socket); |
|
|
| 327 | } |
|
|
| 328 | |
|
|
| 329 | /** |
|
|
| 330 | * This checks the sockets for input, does the right thing. |
|
|
| 331 | * |
|
|
| 332 | * A bit of this code is grabbed out of socket.c |
|
|
| 333 | * There are 2 lists we need to look through - init_sockets is a list |
|
|
| 334 | * |
|
|
| 335 | */ |
|
|
| 336 | void |
|
|
| 337 | doeric_server (void) |
|
|
| 338 | { |
|
|
| 339 | int i, pollret; |
|
|
| 340 | fd_set tmp_read, tmp_write; |
|
|
| 341 | struct sockaddr_in addr; |
|
|
| 342 | socklen_t addrlen = sizeof (struct sockaddr); |
|
|
| 343 | player *pl, *next; |
|
|
| 344 | int maxfd = 0; |
|
|
| 345 | |
|
|
| 346 | #ifdef CS_LOGSTATS |
|
|
| 347 | if ((time (NULL) - cst_lst.time_start) >= CS_LOGTIME) |
|
|
| 348 | write_cs_stats (); |
|
|
| 349 | #endif |
|
|
| 350 | |
|
|
| 351 | /* Go through the players. Let the loop set the next pl value, |
|
|
| 352 | * since we may remove some |
|
|
| 353 | */ |
|
|
| 354 | //TODO: must be handled cleanly elsewhere |
|
|
| 355 | for (pl = first_player; pl; ) |
|
|
| 356 | { |
|
|
| 357 | player *npl = pl->next; |
|
|
| 358 | |
|
|
| 359 | //TODO: must be handled cleanly elsewhere |
|
|
| 360 | if (pl->socket->status == Ns_Dead) |
|
|
| 361 | { |
|
|
| 362 | save_player (pl->ob, 0); |
|
|
| 363 | |
|
|
| 364 | if (!QUERY_FLAG (pl->ob, FLAG_REMOVED)) |
|
|
| 365 | { |
|
|
| 366 | terminate_all_pets (pl->ob); |
|
|
| 367 | pl->ob->remove (); |
|
|
| 368 | } |
|
|
| 369 | |
|
|
| 370 | leave (pl, 1); |
|
|
| 371 | final_free_player (pl); |
|
|
| 372 | } |
|
|
| 373 | |
|
|
| 374 | pl = npl; |
|
|
| 375 | } |
|
|
| 376 | |
|
|
| 377 | FD_ZERO (&tmp_read); |
|
|
| 378 | FD_ZERO (&tmp_write); |
|
|
| 379 | |
|
|
| 380 | for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); ) |
|
|
| 381 | { |
|
|
| 382 | client_socket *s = *i; |
|
|
| 383 | |
|
|
| 384 | if (s->status == Ns_Dead) |
|
|
| 385 | { |
|
|
| 386 | client_sockets.erase (i); |
|
|
| 387 | delete s; |
|
|
| 388 | } |
|
|
| 389 | else |
|
|
| 390 | { |
|
|
| 391 | if (s->fd > maxfd) maxfd = s->fd; |
|
|
| 392 | |
|
|
| 393 | FD_SET (s->fd, &tmp_read); |
|
|
| 394 | |
|
|
| 395 | if (s->outputbuffer.len) |
|
|
| 396 | FD_SET (s->fd, &tmp_write); |
|
|
| 397 | |
|
|
| 398 | ++i; |
|
|
| 399 | } |
|
|
| 400 | } |
|
|
| 401 | |
|
|
| 402 | struct timeval timeout; |
|
|
| 403 | |
|
|
| 404 | timeout.tv_sec = 0; |
|
|
| 405 | timeout.tv_usec = 0; |
|
|
| 406 | |
|
|
| 407 | pollret = select (maxfd + 1, |
|
|
| 408 | &tmp_read, &tmp_write, 0, |
|
|
| 409 | &timeout); |
|
|
| 410 | |
|
|
| 411 | if (pollret == -1) |
|
|
| 412 | { |
|
|
| 413 | LOG (llevError, "select failed: %s\n", strerror (errno)); |
|
|
| 414 | return; |
|
|
| 415 | } |
|
|
| 416 | |
|
|
| 417 | /* We need to do some of the processing below regardless */ |
|
|
| 418 | |
|
|
| 419 | /* Check for any input on the sockets */ |
|
|
| 420 | for (sockvec::iterator i = client_sockets.begin (); i != client_sockets.end (); ++i) |
273 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
| 421 | { |
274 | (*i)->flush (); |
| 422 | client_socket *s = *i; |
275 | } |
| 423 | player *pl = s->pl; |
|
|
| 424 | |
276 | |
| 425 | //TODO: writing should be independent of tick |
277 | void |
| 426 | if (FD_ISSET (s->fd, &tmp_write)) |
278 | client::clock () |
| 427 | { |
279 | { |
| 428 | s->can_write = 1; |
280 | for (sockvec::iterator i = clients.begin (); i != clients.end (); ++i) |
| 429 | write_socket_buffer (s); |
281 | (*i)->tick (); |
| 430 | } |
|
|
| 431 | |
282 | |
| 432 | //TODO: disassociate handleclient from socket readin |
283 | // give them all the same chances |
| 433 | if (s->inbuf_len || FD_ISSET (s->fd, &tmp_read)) |
284 | flush_sockets (); |
| 434 | HandleClient (s, pl); |
|
|
| 435 | |
285 | |
| 436 | //TODO: should not be done here, either |
286 | //TODO: should not be done here, either |
| 437 | if (s->status != Ns_Dead && pl) |
287 | for (unsigned i = 0; i < clients.size (); ++i) |
| 438 | { |
288 | clients[i]->refcnt_chk (); |
| 439 | /* Update the players stats once per tick. More efficient than |
|
|
| 440 | * sending them whenever they change, and probably just as useful |
|
|
| 441 | */ |
|
|
| 442 | esrv_update_stats (pl); |
|
|
| 443 | if (pl->last_weight != -1 && pl->last_weight != WEIGHT (pl->ob)) |
|
|
| 444 | { |
|
|
| 445 | esrv_update_item (UPD_WEIGHT, pl->ob, pl->ob); |
|
|
| 446 | if (pl->last_weight != WEIGHT (pl->ob)) |
|
|
| 447 | LOG (llevError, "esrv_update_item(UPD_WEIGHT) did not set player weight: is %lu, should be %lu\n", |
|
|
| 448 | (unsigned long) pl->last_weight, WEIGHT (pl->ob)); |
|
|
| 449 | } |
|
|
| 450 | |
|
|
| 451 | /* draw_client_map does sanity checking that map is |
|
|
| 452 | * valid, so don't do it here. |
|
|
| 453 | */ |
|
|
| 454 | draw_client_map (pl->ob); |
|
|
| 455 | if (s->update_look) |
|
|
| 456 | esrv_draw_look (pl->ob); |
|
|
| 457 | } |
|
|
| 458 | } |
|
|
| 459 | } |
289 | } |
| 460 | |
290 | |
