1*1c60b9acSAndroid Build Coastguard Worker /*
2*1c60b9acSAndroid Build Coastguard Worker * libwebsockets - small server side websockets and web server implementation
3*1c60b9acSAndroid Build Coastguard Worker *
4*1c60b9acSAndroid Build Coastguard Worker * Copyright (C) 2010 - 2020 Andy Green <[email protected]>
5*1c60b9acSAndroid Build Coastguard Worker *
6*1c60b9acSAndroid Build Coastguard Worker * Permission is hereby granted, free of charge, to any person obtaining a copy
7*1c60b9acSAndroid Build Coastguard Worker * of this software and associated documentation files (the "Software"), to
8*1c60b9acSAndroid Build Coastguard Worker * deal in the Software without restriction, including without limitation the
9*1c60b9acSAndroid Build Coastguard Worker * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10*1c60b9acSAndroid Build Coastguard Worker * sell copies of the Software, and to permit persons to whom the Software is
11*1c60b9acSAndroid Build Coastguard Worker * furnished to do so, subject to the following conditions:
12*1c60b9acSAndroid Build Coastguard Worker *
13*1c60b9acSAndroid Build Coastguard Worker * The above copyright notice and this permission notice shall be included in
14*1c60b9acSAndroid Build Coastguard Worker * all copies or substantial portions of the Software.
15*1c60b9acSAndroid Build Coastguard Worker *
16*1c60b9acSAndroid Build Coastguard Worker * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17*1c60b9acSAndroid Build Coastguard Worker * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18*1c60b9acSAndroid Build Coastguard Worker * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19*1c60b9acSAndroid Build Coastguard Worker * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20*1c60b9acSAndroid Build Coastguard Worker * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21*1c60b9acSAndroid Build Coastguard Worker * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22*1c60b9acSAndroid Build Coastguard Worker * IN THE SOFTWARE.
23*1c60b9acSAndroid Build Coastguard Worker */
24*1c60b9acSAndroid Build Coastguard Worker
25*1c60b9acSAndroid Build Coastguard Worker #if !defined(_GNU_SOURCE)
26*1c60b9acSAndroid Build Coastguard Worker #define _GNU_SOURCE
27*1c60b9acSAndroid Build Coastguard Worker #endif
28*1c60b9acSAndroid Build Coastguard Worker #include "private-lib-core.h"
29*1c60b9acSAndroid Build Coastguard Worker
30*1c60b9acSAndroid Build Coastguard Worker #include <pwd.h>
31*1c60b9acSAndroid Build Coastguard Worker #include <grp.h>
32*1c60b9acSAndroid Build Coastguard Worker #include <dlfcn.h>
33*1c60b9acSAndroid Build Coastguard Worker
34*1c60b9acSAndroid Build Coastguard Worker const lws_plugin_header_t *
lws_plat_dlopen(struct lws_plugin ** pplugin,const char * libpath,const char * sofilename,const char * _class,each_plugin_cb_t each,void * each_user)35*1c60b9acSAndroid Build Coastguard Worker lws_plat_dlopen(struct lws_plugin **pplugin, const char *libpath,
36*1c60b9acSAndroid Build Coastguard Worker const char *sofilename, const char *_class,
37*1c60b9acSAndroid Build Coastguard Worker each_plugin_cb_t each, void *each_user)
38*1c60b9acSAndroid Build Coastguard Worker {
39*1c60b9acSAndroid Build Coastguard Worker const lws_plugin_header_t *hdr;
40*1c60b9acSAndroid Build Coastguard Worker struct lws_plugin *pin;
41*1c60b9acSAndroid Build Coastguard Worker char sym[96];
42*1c60b9acSAndroid Build Coastguard Worker void *l;
43*1c60b9acSAndroid Build Coastguard Worker int m;
44*1c60b9acSAndroid Build Coastguard Worker
45*1c60b9acSAndroid Build Coastguard Worker if (strlen(sofilename) < 6)
46*1c60b9acSAndroid Build Coastguard Worker /* [lib]...[.so] */
47*1c60b9acSAndroid Build Coastguard Worker return NULL;
48*1c60b9acSAndroid Build Coastguard Worker
49*1c60b9acSAndroid Build Coastguard Worker lwsl_info(" trying %s\n", libpath);
50*1c60b9acSAndroid Build Coastguard Worker
51*1c60b9acSAndroid Build Coastguard Worker l = dlopen(libpath, RTLD_NOW);
52*1c60b9acSAndroid Build Coastguard Worker if (!l) {
53*1c60b9acSAndroid Build Coastguard Worker lwsl_info("%s: Error loading DSO: %s\n", __func__, dlerror());
54*1c60b9acSAndroid Build Coastguard Worker
55*1c60b9acSAndroid Build Coastguard Worker return NULL;
56*1c60b9acSAndroid Build Coastguard Worker }
57*1c60b9acSAndroid Build Coastguard Worker
58*1c60b9acSAndroid Build Coastguard Worker /* we could open it... can we get his export struct? */
59*1c60b9acSAndroid Build Coastguard Worker m = lws_snprintf(sym, sizeof(sym) - 1, "%s", sofilename);
60*1c60b9acSAndroid Build Coastguard Worker if (m < 4)
61*1c60b9acSAndroid Build Coastguard Worker goto bail;
62*1c60b9acSAndroid Build Coastguard Worker if (!strcmp(&sym[m - 3], ".so"))
63*1c60b9acSAndroid Build Coastguard Worker sym[m - 3] = '\0'; /* snip the .so */
64*1c60b9acSAndroid Build Coastguard Worker
65*1c60b9acSAndroid Build Coastguard Worker hdr = (const lws_plugin_header_t *)dlsym(l, sym);
66*1c60b9acSAndroid Build Coastguard Worker if (!hdr) {
67*1c60b9acSAndroid Build Coastguard Worker lwsl_info("%s: Failed to get export '%s' from %s: %s\n",
68*1c60b9acSAndroid Build Coastguard Worker __func__, sym, libpath, dlerror());
69*1c60b9acSAndroid Build Coastguard Worker goto bail;
70*1c60b9acSAndroid Build Coastguard Worker }
71*1c60b9acSAndroid Build Coastguard Worker
72*1c60b9acSAndroid Build Coastguard Worker if (hdr->api_magic != LWS_PLUGIN_API_MAGIC) {
73*1c60b9acSAndroid Build Coastguard Worker lwsl_info("%s: plugin %s has outdated api %d (vs %d)\n",
74*1c60b9acSAndroid Build Coastguard Worker __func__, libpath, hdr->api_magic,
75*1c60b9acSAndroid Build Coastguard Worker LWS_PLUGIN_API_MAGIC);
76*1c60b9acSAndroid Build Coastguard Worker goto bail;
77*1c60b9acSAndroid Build Coastguard Worker }
78*1c60b9acSAndroid Build Coastguard Worker
79*1c60b9acSAndroid Build Coastguard Worker if (strcmp(hdr->lws_build_hash, LWS_BUILD_HASH))
80*1c60b9acSAndroid Build Coastguard Worker goto bail;
81*1c60b9acSAndroid Build Coastguard Worker
82*1c60b9acSAndroid Build Coastguard Worker if (strcmp(hdr->_class, _class))
83*1c60b9acSAndroid Build Coastguard Worker goto bail;
84*1c60b9acSAndroid Build Coastguard Worker
85*1c60b9acSAndroid Build Coastguard Worker /*
86*1c60b9acSAndroid Build Coastguard Worker * We don't already have one of these, right?
87*1c60b9acSAndroid Build Coastguard Worker */
88*1c60b9acSAndroid Build Coastguard Worker
89*1c60b9acSAndroid Build Coastguard Worker pin = *pplugin;
90*1c60b9acSAndroid Build Coastguard Worker while (pin) {
91*1c60b9acSAndroid Build Coastguard Worker if (!strcmp(pin->hdr->name, hdr->name))
92*1c60b9acSAndroid Build Coastguard Worker goto bail;
93*1c60b9acSAndroid Build Coastguard Worker pin = pin->list;
94*1c60b9acSAndroid Build Coastguard Worker }
95*1c60b9acSAndroid Build Coastguard Worker
96*1c60b9acSAndroid Build Coastguard Worker /*
97*1c60b9acSAndroid Build Coastguard Worker * OK let's bring it in
98*1c60b9acSAndroid Build Coastguard Worker */
99*1c60b9acSAndroid Build Coastguard Worker
100*1c60b9acSAndroid Build Coastguard Worker pin = lws_malloc(sizeof(*pin), __func__);
101*1c60b9acSAndroid Build Coastguard Worker if (!pin)
102*1c60b9acSAndroid Build Coastguard Worker goto bail;
103*1c60b9acSAndroid Build Coastguard Worker
104*1c60b9acSAndroid Build Coastguard Worker pin->list = *pplugin;
105*1c60b9acSAndroid Build Coastguard Worker *pplugin = pin;
106*1c60b9acSAndroid Build Coastguard Worker
107*1c60b9acSAndroid Build Coastguard Worker pin->u.l = l;
108*1c60b9acSAndroid Build Coastguard Worker pin->hdr = hdr;
109*1c60b9acSAndroid Build Coastguard Worker
110*1c60b9acSAndroid Build Coastguard Worker if (each)
111*1c60b9acSAndroid Build Coastguard Worker each(pin, each_user);
112*1c60b9acSAndroid Build Coastguard Worker
113*1c60b9acSAndroid Build Coastguard Worker lwsl_notice(" %s\n", libpath);
114*1c60b9acSAndroid Build Coastguard Worker
115*1c60b9acSAndroid Build Coastguard Worker return hdr;
116*1c60b9acSAndroid Build Coastguard Worker
117*1c60b9acSAndroid Build Coastguard Worker bail:
118*1c60b9acSAndroid Build Coastguard Worker dlclose(l);
119*1c60b9acSAndroid Build Coastguard Worker
120*1c60b9acSAndroid Build Coastguard Worker return NULL;
121*1c60b9acSAndroid Build Coastguard Worker }
122*1c60b9acSAndroid Build Coastguard Worker
123*1c60b9acSAndroid Build Coastguard Worker int
lws_plat_destroy_dl(struct lws_plugin * p)124*1c60b9acSAndroid Build Coastguard Worker lws_plat_destroy_dl(struct lws_plugin *p)
125*1c60b9acSAndroid Build Coastguard Worker {
126*1c60b9acSAndroid Build Coastguard Worker return dlclose(p->u.l);
127*1c60b9acSAndroid Build Coastguard Worker }
128