1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
/*
* Copyright © 2023 Michael Smith <mikesmiffy128@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include <string.h>
#include "engineapi.h"
#include "errmsg.h"
#include "feature.h"
#include "gamedata.h"
#include "gametype.h"
#include "kvsys.h"
#include "mem.h"
#include "os.h"
#include "vcall.h"
FEATURE()
REQUIRE(kvsys)
REQUIRE_GAMEDATA(vtidx_GetMatchNetworkMsgController)
REQUIRE_GAMEDATA(vtidx_GetActiveGameServerDetails)
DECL_VFUNC_DYN(void *, GetMatchNetworkMsgController)
DECL_VFUNC_DYN(struct KeyValues *, GetActiveGameServerDetails,
struct KeyValues *)
// Old L4D1 uses a heavily modified version of the CMatchmaking in Source 2007.
// None of it is publicly documented or well-understood but I was able to figure
// out that this random function does something *close enough* to what we want.
struct contextval {
const char *name;
int _unknown[8];
const char *val;
/* other stuff unknown */
};
DECL_VFUNC(struct contextval *, unknown_contextlookup, 67, const char *)
static void *matchfwk;
static union { // space saving
struct { int sym_game, sym_campaign; }; // "game/campaign" KV lookup
void *oldmmiface; // old L4D1 interface
} U;
#define oldmmiface U.oldmmiface
#define sym_game U.sym_game
#define sym_campaign U.sym_campaign
static char campaignbuf[32];
const char *l4dmm_curcampaign(void) {
#ifdef _WIN32
if (!matchfwk) { // we must have oldmmiface, then
struct contextval *ctxt = unknown_contextlookup(oldmmiface,
"CONTEXT_L4D_CAMPAIGN");
if (ctxt) {
// HACK: since this context symbol stuff was the best that was found
// for this old MM interface, just map things back to their names
// manually. bit stupid, but it gets the (rather difficult) job done
if (strncmp(ctxt->val, "CONTEXT_L4D_CAMPAIGN_", 21)) return 0;
if (!strcmp(ctxt->val + 21, "APARTMENTS")) return "Hospital";
if (!strcmp(ctxt->val + 21, "CAVES")) return "SmallTown";
if (!strcmp(ctxt->val + 21, "GREENHOUSE")) return "Airport";
if (!strcmp(ctxt->val + 21, "HILLTOP")) return "Farm";
}
return 0;
}
#endif
void *ctrlr = GetMatchNetworkMsgController(matchfwk);
struct KeyValues *kv = GetActiveGameServerDetails(ctrlr, 0);
if (!kv) return 0; // not in server, probably
const char *ret = 0;
struct KeyValues *subkey = kvsys_getsubkey(kv, sym_game);
if (subkey) subkey = kvsys_getsubkey(subkey, sym_campaign);
if (subkey) ret = kvsys_getstrval(subkey);
if (ret) {
// ugh, we have to free all the memory allocated by the engine, so copy
// this glorified global state to a buffer so the caller doesn't have to
// deal with freeing. this necessitates a length cap but it's hopefully
// reasonable...
int len = strlen(ret);
if (len > sizeof(campaignbuf) - 1) ret = 0;
else ret = memcpy(campaignbuf, ret, len + 1);
}
kvsys_free(kv);
return ret;
}
INIT {
// ugh, we NEED to centralise the library stuff at some point, this sucks
#ifdef _WIN32
void *mmlib = GetModuleHandleW(L"matchmaking.dll");
#else
void *mmlib = dlopen("matchmaking.so", RTLD_NOW | RTLD_NOLOAD);
if (mmlib) dlclose(mmlib);
#endif
if (mmlib) {
ifacefactory factory = (ifacefactory)os_dlsym(mmlib, "CreateInterface");
if (!factory) {
errmsg_errordl("couldn't get matchmaking interface factory");
return false;
}
matchfwk = factory("MATCHFRAMEWORK_001", 0);
if (!matchfwk) {
errmsg_errorx("couldn't get IMatchFramework interface");
return false;
}
sym_game = kvsys_strtosym("game");
sym_campaign = kvsys_strtosym("campaign");
}
else {
#ifdef _WIN32
oldmmiface = factory_engine("VENGINE_MATCHMAKING_VERSION001", 0);
if (!oldmmiface) {
errmsg_errorx("couldn't get IMatchmaking interface");
return false;
}
#else // Linux L4D1 has always used the separate matchmaking library
errmsg_errordl("couldn't get matchmaking library");
return false;
#endif
}
return true;
}
// vi: sw=4 ts=4 noet tw=80 cc=80
|
