diff options
Diffstat (limited to 'cmds/servicemanager/binder.c')
| -rw-r--r-- | cmds/servicemanager/binder.c | 616 |
1 files changed, 0 insertions, 616 deletions
diff --git a/cmds/servicemanager/binder.c b/cmds/servicemanager/binder.c deleted file mode 100644 index 1985756..0000000 --- a/cmds/servicemanager/binder.c +++ /dev/null @@ -1,616 +0,0 @@ -/* Copyright 2008 The Android Open Source Project - */ - -#include <stdio.h> -#include <stdlib.h> -#include <errno.h> -#include <unistd.h> -#include <fcntl.h> -#include <sys/mman.h> - -#include "binder.h" - -#define MAX_BIO_SIZE (1 << 30) - -#define TRACE 0 - -#define LOG_TAG "Binder" -#include <cutils/log.h> - -void bio_init_from_txn(struct binder_io *io, struct binder_txn *txn); - -#if TRACE -void hexdump(void *_data, unsigned len) -{ - unsigned char *data = _data; - unsigned count; - - for (count = 0; count < len; count++) { - if ((count & 15) == 0) - fprintf(stderr,"%04x:", count); - fprintf(stderr," %02x %c", *data, - (*data < 32) || (*data > 126) ? '.' : *data); - data++; - if ((count & 15) == 15) - fprintf(stderr,"\n"); - } - if ((count & 15) != 0) - fprintf(stderr,"\n"); -} - -void binder_dump_txn(struct binder_txn *txn) -{ - struct binder_object *obj; - unsigned *offs = txn->offs; - unsigned count = txn->offs_size / 4; - - fprintf(stderr," target %p cookie %p code %08x flags %08x\n", - txn->target, txn->cookie, txn->code, txn->flags); - fprintf(stderr," pid %8d uid %8d data %8d offs %8d\n", - txn->sender_pid, txn->sender_euid, txn->data_size, txn->offs_size); - hexdump(txn->data, txn->data_size); - while (count--) { - obj = (void*) (((char*) txn->data) + *offs++); - fprintf(stderr," - type %08x flags %08x ptr %p cookie %p\n", - obj->type, obj->flags, obj->pointer, obj->cookie); - } -} - -#define NAME(n) case n: return #n -const char *cmd_name(uint32_t cmd) -{ - switch(cmd) { - NAME(BR_NOOP); - NAME(BR_TRANSACTION_COMPLETE); - NAME(BR_INCREFS); - NAME(BR_ACQUIRE); - NAME(BR_RELEASE); - NAME(BR_DECREFS); - NAME(BR_TRANSACTION); - NAME(BR_REPLY); - NAME(BR_FAILED_REPLY); - NAME(BR_DEAD_REPLY); - NAME(BR_DEAD_BINDER); - default: return "???"; - } -} -#else -#define hexdump(a,b) do{} while (0) -#define binder_dump_txn(txn) do{} while (0) -#endif - -#define BIO_F_SHARED 0x01 /* needs to be buffer freed */ -#define BIO_F_OVERFLOW 0x02 /* ran out of space */ -#define BIO_F_IOERROR 0x04 -#define BIO_F_MALLOCED 0x08 /* needs to be free()'d */ - -struct binder_state -{ - int fd; - void *mapped; - unsigned mapsize; -}; - -struct binder_state *binder_open(unsigned mapsize) -{ - struct binder_state *bs; - - bs = malloc(sizeof(*bs)); - if (!bs) { - errno = ENOMEM; - return 0; - } - - bs->fd = open("/dev/binder", O_RDWR); - if (bs->fd < 0) { - fprintf(stderr,"binder: cannot open device (%s)\n", - strerror(errno)); - goto fail_open; - } - - bs->mapsize = mapsize; - bs->mapped = mmap(NULL, mapsize, PROT_READ, MAP_PRIVATE, bs->fd, 0); - if (bs->mapped == MAP_FAILED) { - fprintf(stderr,"binder: cannot map device (%s)\n", - strerror(errno)); - goto fail_map; - } - - /* TODO: check version */ - - return bs; - -fail_map: - close(bs->fd); -fail_open: - free(bs); - return 0; -} - -void binder_close(struct binder_state *bs) -{ - munmap(bs->mapped, bs->mapsize); - close(bs->fd); - free(bs); -} - -int binder_become_context_manager(struct binder_state *bs) -{ - return ioctl(bs->fd, BINDER_SET_CONTEXT_MGR, 0); -} - -int binder_write(struct binder_state *bs, void *data, unsigned len) -{ - struct binder_write_read bwr; - int res; - bwr.write_size = len; - bwr.write_consumed = 0; - bwr.write_buffer = (unsigned) data; - bwr.read_size = 0; - bwr.read_consumed = 0; - bwr.read_buffer = 0; - res = ioctl(bs->fd, BINDER_WRITE_READ, &bwr); - if (res < 0) { - fprintf(stderr,"binder_write: ioctl failed (%s)\n", - strerror(errno)); - } - return res; -} - -void binder_send_reply(struct binder_state *bs, - struct binder_io *reply, - void *buffer_to_free, - int status) -{ - struct { - uint32_t cmd_free; - void *buffer; - uint32_t cmd_reply; - struct binder_txn txn; - } __attribute__((packed)) data; - - data.cmd_free = BC_FREE_BUFFER; - data.buffer = buffer_to_free; - data.cmd_reply = BC_REPLY; - data.txn.target = 0; - data.txn.cookie = 0; - data.txn.code = 0; - if (status) { - data.txn.flags = TF_STATUS_CODE; - data.txn.data_size = sizeof(int); - data.txn.offs_size = 0; - data.txn.data = &status; - data.txn.offs = 0; - } else { - data.txn.flags = 0; - data.txn.data_size = reply->data - reply->data0; - data.txn.offs_size = ((char*) reply->offs) - ((char*) reply->offs0); - data.txn.data = reply->data0; - data.txn.offs = reply->offs0; - } - binder_write(bs, &data, sizeof(data)); -} - -int binder_parse(struct binder_state *bs, struct binder_io *bio, - uint32_t *ptr, uint32_t size, binder_handler func) -{ - int r = 1; - uint32_t *end = ptr + (size / 4); - - while (ptr < end) { - uint32_t cmd = *ptr++; -#if TRACE - fprintf(stderr,"%s:\n", cmd_name(cmd)); -#endif - switch(cmd) { - case BR_NOOP: - break; - case BR_TRANSACTION_COMPLETE: - break; - case BR_INCREFS: - case BR_ACQUIRE: - case BR_RELEASE: - case BR_DECREFS: -#if TRACE - fprintf(stderr," %08x %08x\n", ptr[0], ptr[1]); -#endif - ptr += 2; - break; - case BR_TRANSACTION: { - struct binder_txn *txn = (void *) ptr; - if ((end - ptr) * sizeof(uint32_t) < sizeof(struct binder_txn)) { - ALOGE("parse: txn too small!\n"); - return -1; - } - binder_dump_txn(txn); - if (func) { - unsigned rdata[256/4]; - struct binder_io msg; - struct binder_io reply; - int res; - - bio_init(&reply, rdata, sizeof(rdata), 4); - bio_init_from_txn(&msg, txn); - res = func(bs, txn, &msg, &reply); - binder_send_reply(bs, &reply, txn->data, res); - } - ptr += sizeof(*txn) / sizeof(uint32_t); - break; - } - case BR_REPLY: { - struct binder_txn *txn = (void*) ptr; - if ((end - ptr) * sizeof(uint32_t) < sizeof(struct binder_txn)) { - ALOGE("parse: reply too small!\n"); - return -1; - } - binder_dump_txn(txn); - if (bio) { - bio_init_from_txn(bio, txn); - bio = 0; - } else { - /* todo FREE BUFFER */ - } - ptr += (sizeof(*txn) / sizeof(uint32_t)); - r = 0; - break; - } - case BR_DEAD_BINDER: { - struct binder_death *death = (void*) *ptr++; - death->func(bs, death->ptr); - break; - } - case BR_FAILED_REPLY: - r = -1; - break; - case BR_DEAD_REPLY: - r = -1; - break; - default: - ALOGE("parse: OOPS %d\n", cmd); - return -1; - } - } - - return r; -} - -void binder_acquire(struct binder_state *bs, void *ptr) -{ - uint32_t cmd[2]; - cmd[0] = BC_ACQUIRE; - cmd[1] = (uint32_t) ptr; - binder_write(bs, cmd, sizeof(cmd)); -} - -void binder_release(struct binder_state *bs, void *ptr) -{ - uint32_t cmd[2]; - cmd[0] = BC_RELEASE; - cmd[1] = (uint32_t) ptr; - binder_write(bs, cmd, sizeof(cmd)); -} - -void binder_link_to_death(struct binder_state *bs, void *ptr, struct binder_death *death) -{ - uint32_t cmd[3]; - cmd[0] = BC_REQUEST_DEATH_NOTIFICATION; - cmd[1] = (uint32_t) ptr; - cmd[2] = (uint32_t) death; - binder_write(bs, cmd, sizeof(cmd)); -} - - -int binder_call(struct binder_state *bs, - struct binder_io *msg, struct binder_io *reply, - void *target, uint32_t code) -{ - int res; - struct binder_write_read bwr; - struct { - uint32_t cmd; - struct binder_txn txn; - } writebuf; - unsigned readbuf[32]; - - if (msg->flags & BIO_F_OVERFLOW) { - fprintf(stderr,"binder: txn buffer overflow\n"); - goto fail; - } - - writebuf.cmd = BC_TRANSACTION; - writebuf.txn.target = target; - writebuf.txn.code = code; - writebuf.txn.flags = 0; - writebuf.txn.data_size = msg->data - msg->data0; - writebuf.txn.offs_size = ((char*) msg->offs) - ((char*) msg->offs0); - writebuf.txn.data = msg->data0; - writebuf.txn.offs = msg->offs0; - - bwr.write_size = sizeof(writebuf); - bwr.write_consumed = 0; - bwr.write_buffer = (unsigned) &writebuf; - - hexdump(msg->data0, msg->data - msg->data0); - for (;;) { - bwr.read_size = sizeof(readbuf); - bwr.read_consumed = 0; - bwr.read_buffer = (unsigned) readbuf; - - res = ioctl(bs->fd, BINDER_WRITE_READ, &bwr); - - if (res < 0) { - fprintf(stderr,"binder: ioctl failed (%s)\n", strerror(errno)); - goto fail; - } - - res = binder_parse(bs, reply, readbuf, bwr.read_consumed, 0); - if (res == 0) return 0; - if (res < 0) goto fail; - } - -fail: - memset(reply, 0, sizeof(*reply)); - reply->flags |= BIO_F_IOERROR; - return -1; -} - -void binder_loop(struct binder_state *bs, binder_handler func) -{ - int res; - struct binder_write_read bwr; - unsigned readbuf[32]; - - bwr.write_size = 0; - bwr.write_consumed = 0; - bwr.write_buffer = 0; - - readbuf[0] = BC_ENTER_LOOPER; - binder_write(bs, readbuf, sizeof(unsigned)); - - for (;;) { - bwr.read_size = sizeof(readbuf); - bwr.read_consumed = 0; - bwr.read_buffer = (unsigned) readbuf; - - res = ioctl(bs->fd, BINDER_WRITE_READ, &bwr); - - if (res < 0) { - ALOGE("binder_loop: ioctl failed (%s)\n", strerror(errno)); - break; - } - - res = binder_parse(bs, 0, readbuf, bwr.read_consumed, func); - if (res == 0) { - ALOGE("binder_loop: unexpected reply?!\n"); - break; - } - if (res < 0) { - ALOGE("binder_loop: io error %d %s\n", res, strerror(errno)); - break; - } - } -} - -void bio_init_from_txn(struct binder_io *bio, struct binder_txn *txn) -{ - bio->data = bio->data0 = txn->data; - bio->offs = bio->offs0 = txn->offs; - bio->data_avail = txn->data_size; - bio->offs_avail = txn->offs_size / 4; - bio->flags = BIO_F_SHARED; -} - -void bio_init(struct binder_io *bio, void *data, - uint32_t maxdata, uint32_t maxoffs) -{ - uint32_t n = maxoffs * sizeof(uint32_t); - - if (n > maxdata) { - bio->flags = BIO_F_OVERFLOW; - bio->data_avail = 0; - bio->offs_avail = 0; - return; - } - - bio->data = bio->data0 = (char *) data + n; - bio->offs = bio->offs0 = data; - bio->data_avail = maxdata - n; - bio->offs_avail = maxoffs; - bio->flags = 0; -} - -static void *bio_alloc(struct binder_io *bio, uint32_t size) -{ - size = (size + 3) & (~3); - if (size > bio->data_avail) { - bio->flags |= BIO_F_OVERFLOW; - return 0; - } else { - void *ptr = bio->data; - bio->data += size; - bio->data_avail -= size; - return ptr; - } -} - -void binder_done(struct binder_state *bs, - struct binder_io *msg, - struct binder_io *reply) -{ - if (reply->flags & BIO_F_SHARED) { - uint32_t cmd[2]; - cmd[0] = BC_FREE_BUFFER; - cmd[1] = (uint32_t) reply->data0; - binder_write(bs, cmd, sizeof(cmd)); - reply->flags = 0; - } -} - -static struct binder_object *bio_alloc_obj(struct binder_io *bio) -{ - struct binder_object *obj; - - obj = bio_alloc(bio, sizeof(*obj)); - - if (obj && bio->offs_avail) { - bio->offs_avail--; - *bio->offs++ = ((char*) obj) - ((char*) bio->data0); - return obj; - } - - bio->flags |= BIO_F_OVERFLOW; - return 0; -} - -void bio_put_uint32(struct binder_io *bio, uint32_t n) -{ - uint32_t *ptr = bio_alloc(bio, sizeof(n)); - if (ptr) - *ptr = n; -} - -void bio_put_obj(struct binder_io *bio, void *ptr) -{ - struct binder_object *obj; - - obj = bio_alloc_obj(bio); - if (!obj) - return; - - obj->flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; - obj->type = BINDER_TYPE_BINDER; - obj->pointer = ptr; - obj->cookie = 0; -} - -void bio_put_ref(struct binder_io *bio, void *ptr) -{ - struct binder_object *obj; - - if (ptr) - obj = bio_alloc_obj(bio); - else - obj = bio_alloc(bio, sizeof(*obj)); - - if (!obj) - return; - - obj->flags = 0x7f | FLAT_BINDER_FLAG_ACCEPTS_FDS; - obj->type = BINDER_TYPE_HANDLE; - obj->pointer = ptr; - obj->cookie = 0; -} - -void bio_put_string16(struct binder_io *bio, const uint16_t *str) -{ - uint32_t len; - uint16_t *ptr; - - if (!str) { - bio_put_uint32(bio, 0xffffffff); - return; - } - - len = 0; - while (str[len]) len++; - - if (len >= (MAX_BIO_SIZE / sizeof(uint16_t))) { - bio_put_uint32(bio, 0xffffffff); - return; - } - - bio_put_uint32(bio, len); - len = (len + 1) * sizeof(uint16_t); - ptr = bio_alloc(bio, len); - if (ptr) - memcpy(ptr, str, len); -} - -void bio_put_string16_x(struct binder_io *bio, const char *_str) -{ - unsigned char *str = (unsigned char*) _str; - uint32_t len; - uint16_t *ptr; - - if (!str) { - bio_put_uint32(bio, 0xffffffff); - return; - } - - len = strlen(_str); - - if (len >= (MAX_BIO_SIZE / sizeof(uint16_t))) { - bio_put_uint32(bio, 0xffffffff); - return; - } - - bio_put_uint32(bio, len); - ptr = bio_alloc(bio, (len + 1) * sizeof(uint16_t)); - if (!ptr) - return; - - while (*str) - *ptr++ = *str++; - *ptr++ = 0; -} - -static void *bio_get(struct binder_io *bio, uint32_t size) -{ - size = (size + 3) & (~3); - - if (bio->data_avail < size){ - bio->data_avail = 0; - bio->flags |= BIO_F_OVERFLOW; - return 0; - } else { - void *ptr = bio->data; - bio->data += size; - bio->data_avail -= size; - return ptr; - } -} - -uint32_t bio_get_uint32(struct binder_io *bio) -{ - uint32_t *ptr = bio_get(bio, sizeof(*ptr)); - return ptr ? *ptr : 0; -} - -uint16_t *bio_get_string16(struct binder_io *bio, unsigned *sz) -{ - unsigned len; - len = bio_get_uint32(bio); - if (sz) - *sz = len; - return bio_get(bio, (len + 1) * sizeof(uint16_t)); -} - -static struct binder_object *_bio_get_obj(struct binder_io *bio) -{ - unsigned n; - unsigned off = bio->data - bio->data0; - - /* TODO: be smarter about this? */ - for (n = 0; n < bio->offs_avail; n++) { - if (bio->offs[n] == off) - return bio_get(bio, sizeof(struct binder_object)); - } - - bio->data_avail = 0; - bio->flags |= BIO_F_OVERFLOW; - return 0; -} - -void *bio_get_ref(struct binder_io *bio) -{ - struct binder_object *obj; - - obj = _bio_get_obj(bio); - if (!obj) - return 0; - - if (obj->type == BINDER_TYPE_HANDLE) - return obj->pointer; - - return 0; -} |