1 /* //device/system/rild/rild.c
3 ** Copyright 2006, The Android Open Source Project
5 ** Licensed under the Apache License, Version 2.0 (the "License");
6 ** you may not use this file except in compliance with the License.
7 ** You may obtain a copy of the License at
9 ** http://www.apache.org/licenses/LICENSE-2.0
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
27 #include <telephony/ril.h>
28 #define LOG_TAG "RILD"
29 #include <utils/Log.h>
30 #include <cutils/properties.h>
31 #include <cutils/sockets.h>
32 #include <sys/capability.h>
33 #include <sys/prctl.h>
35 #include <private/android_filesystem_config.h>
36 #include "hardware/qemu_pipe.h"
38 #define LIB_PATH_PROPERTY "rild.libpath"
39 #define LIB_ARGS_PROPERTY "rild.libargs"
40 #define MAX_LIB_ARGS 16
42 static void usage(const char *argv0)
44 fprintf(stderr, "Usage: %s -l <ril impl library> [-- <args for impl library>]\n", argv0);
48 extern void RIL_register (const RIL_RadioFunctions *callbacks);
50 extern void RIL_onRequestComplete(RIL_Token t, RIL_Errno e,
51 void *response, size_t responselen);
53 extern void RIL_onUnsolicitedResponse(int unsolResponse, const void *data,
56 extern void RIL_requestTimedCallback (RIL_TimedCallback callback,
57 void *param, const struct timeval *relativeTime);
60 static struct RIL_Env s_rilEnv = {
61 RIL_onRequestComplete,
62 RIL_onUnsolicitedResponse,
63 RIL_requestTimedCallback
66 extern void RIL_startEventLoop();
68 static int make_argv(char * args, char ** argv)
70 // Note: reserve argv[0]
75 while ((tok = strtok(s, " \0"))) {
84 * switchUser - Switches UID to radio, preserving CAP_NET_ADMIN capabilities.
85 * Our group, cache, was set by init.
88 prctl(PR_SET_KEEPCAPS, 1, 0, 0, 0);
91 struct __user_cap_header_struct header;
92 memset(&header, 0, sizeof(header));
93 header.version = _LINUX_CAPABILITY_VERSION_3;
96 struct __user_cap_data_struct data[2];
97 memset(&data, 0, sizeof(data));
99 data[CAP_TO_INDEX(CAP_NET_ADMIN)].effective |= CAP_TO_MASK(CAP_NET_ADMIN);
100 data[CAP_TO_INDEX(CAP_NET_ADMIN)].permitted |= CAP_TO_MASK(CAP_NET_ADMIN);
102 data[CAP_TO_INDEX(CAP_NET_RAW)].effective |= CAP_TO_MASK(CAP_NET_RAW);
103 data[CAP_TO_INDEX(CAP_NET_RAW)].permitted |= CAP_TO_MASK(CAP_NET_RAW);
105 if (capset(&header, &data[0]) == -1) {
106 RLOGE("capset failed: %s", strerror(errno));
111 int main(int argc, char **argv)
113 const char * rilLibPath = NULL;
116 const RIL_RadioFunctions *(*rilInit)(const struct RIL_Env *, int, char **);
117 const RIL_RadioFunctions *funcs;
118 char libPath[PROPERTY_VALUE_MAX];
119 unsigned char hasLibArgs = 0;
123 umask(S_IRGRP | S_IWGRP | S_IXGRP | S_IROTH | S_IWOTH | S_IXOTH);
124 for (i = 1; i < argc ;) {
125 if (0 == strcmp(argv[i], "-l") && (argc - i > 1)) {
126 rilLibPath = argv[i + 1];
128 } else if (0 == strcmp(argv[i], "--")) {
137 if (rilLibPath == NULL) {
138 if ( 0 == property_get(LIB_PATH_PROPERTY, libPath, NULL)) {
139 // No lib sepcified on the command line, and nothing set in props.
140 // Assume "no-ril" case.
143 rilLibPath = libPath;
147 /* special override when in the emulator */
150 static char* arg_overrides[3];
151 static char arg_device[32];
154 #define REFERENCE_RIL_PATH "/system/lib/libreference-ril.so"
156 /* first, read /proc/cmdline into memory */
157 char buffer[1024], *p, *q;
159 int fd = open("/proc/cmdline",O_RDONLY);
162 RLOGD("could not open /proc/cmdline:%s", strerror(errno));
167 len = read(fd,buffer,sizeof(buffer)); }
168 while (len == -1 && errno == EINTR);
171 RLOGD("could not read /proc/cmdline:%s", strerror(errno));
177 if (strstr(buffer, "android.qemud=") != NULL)
179 /* the qemud daemon is launched after rild, so
180 * give it some time to create its GSM socket
183 #define QEMUD_SOCKET_NAME "qemud"
190 fd = qemu_pipe_open("qemud:gsm");
192 fd = socket_local_client(
194 ANDROID_SOCKET_NAMESPACE_RESERVED,
199 snprintf( arg_device, sizeof(arg_device), "%s/%s",
200 ANDROID_SOCKET_DIR, QEMUD_SOCKET_NAME );
202 arg_overrides[1] = "-s";
203 arg_overrides[2] = arg_device;
207 RLOGD("could not connect to %s socket: %s",
208 QEMUD_SOCKET_NAME, strerror(errno));
213 RLOGE("could not connect to %s socket (giving up): %s",
214 QEMUD_SOCKET_NAME, strerror(errno));
220 /* otherwise, try to see if we passed a device name from the kernel */
222 #define KERNEL_OPTION "android.ril="
223 #define DEV_PREFIX "/dev/"
225 p = strstr( buffer, KERNEL_OPTION );
229 p += sizeof(KERNEL_OPTION)-1;
230 q = strpbrk( p, " \t\n\r" );
234 snprintf( arg_device, sizeof(arg_device), DEV_PREFIX "%s", p );
235 arg_device[sizeof(arg_device)-1] = 0;
236 arg_overrides[1] = "-d";
237 arg_overrides[2] = arg_device;
243 argv = arg_overrides;
247 rilLibPath = REFERENCE_RIL_PATH;
249 RLOGD("overriding with %s %s", arg_overrides[1], arg_overrides[2]);
256 dlHandle = dlopen(rilLibPath, RTLD_NOW);
258 if (dlHandle == NULL) {
259 RLOGE("dlopen failed: %s", dlerror());
263 RIL_startEventLoop();
265 rilInit = (const RIL_RadioFunctions *(*)(const struct RIL_Env *, int, char **))dlsym(dlHandle, "RIL_Init");
267 if (rilInit == NULL) {
268 RLOGE("RIL_Init not defined or exported in %s\n", rilLibPath);
273 rilArgv = argv + i - 1;
276 static char * newArgv[MAX_LIB_ARGS];
277 static char args[PROPERTY_VALUE_MAX];
279 property_get(LIB_ARGS_PROPERTY, args, "");
280 argc = make_argv(args, rilArgv);
283 // Make sure there's a reasonable argv[0]
284 rilArgv[0] = argv[0];
286 funcs = rilInit(&s_rilEnv, argc, rilArgv);