service_manager.c revision 7d42a3c31ba78a418f9bdde0e0ab951469f321b5
194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood/* Copyright 2008 The Android Open Source Project 294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood */ 394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#include <stdio.h> 594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#include <stdlib.h> 694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#include <errno.h> 794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#include <fcntl.h> 894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#include <private/android_filesystem_config.h> 1094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 1169154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn#include <selinux/android.h> 127d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich#include <selinux/avc.h> 1369154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 1494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#include "binder.h" 1594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 1694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#if 0 1794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#define ALOGI(x...) fprintf(stderr, "svcmgr: " x) 1894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#define ALOGE(x...) fprintf(stderr, "svcmgr: " x) 1994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#else 2094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#define LOG_TAG "ServiceManager" 2194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#include <cutils/log.h> 2294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#endif 2394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 245fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescuuint32_t svcmgr_handle; 2594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 267d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevichconst char *str8(const uint16_t *x, size_t x_len) 2794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 2894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood static char buf[128]; 297d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich size_t max = 127; 3094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood char *p = buf; 3194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 327d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich if (x_len < max) { 337d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich max = x_len; 347d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich } 357d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich 3694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if (x) { 377d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich while ((max > 0) && (*x != '\0')) { 3894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood *p++ = *x++; 397d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich max--; 4094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 4194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 4294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood *p++ = 0; 4394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return buf; 4494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 4594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 469b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescuint str16eq(const uint16_t *a, const char *b) 4794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 4894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood while (*a && *b) 4994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if (*a++ != *b++) return 0; 5094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if (*a || *b) 5194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 0; 5294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 1; 5394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 5494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 5569154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahnstatic struct selabel_handle* sehandle; 5669154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 5769154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahnstatic bool check_mac_perms(const char *name, pid_t spid) 5869154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn{ 5969154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn if (is_selinux_enabled() <= 0) { 6069154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn return true; 6169154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn } 6269154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 6369154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn bool allowed = false; 6469154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 6569154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn const char *class = "service_manager"; 6669154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn const char *perm = "add"; 6769154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 6869154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn char *tctx = NULL; 6969154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn char *sctx = NULL; 7069154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 7169154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn if (!sehandle) { 7269154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn ALOGE("SELinux: Failed to find sehandle %s.\n", name); 7369154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn return false; 7469154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn } 7569154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 7669154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn if (getpidcon(spid, &sctx) < 0) { 7769154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn ALOGE("SELinux: getpidcon failed to retrieve pid context.\n"); 7869154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn return false; 7969154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn } 8069154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 8169154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn if (!sctx) { 8269154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn ALOGE("SELinux: Failed to find sctx for %s.\n", name); 8369154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn return false; 8469154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn } 8569154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 8669154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn if (selabel_lookup(sehandle, &tctx, name, 1) != 0) { 8769154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn ALOGE("SELinux: selabel_lookup failed to set tctx for %s.\n", name); 8869154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn freecon(sctx); 8969154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn return false; 9069154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn } 9169154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 9269154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn if (!tctx) { 9369154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn ALOGE("SELinux: Failed to find tctx for %s.\n", name); 9469154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn freecon(sctx); 9569154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn return false; 9669154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn } 9769154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 9869154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn int result = selinux_check_access(sctx, tctx, class, perm, (void *) name); 9969154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn allowed = (result == 0); 10069154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 10169154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn freecon(sctx); 10269154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn freecon(tctx); 10369154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn return allowed; 10469154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn} 10569154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 1067d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevichstatic int svc_can_register(uid_t uid, const uint16_t *name, size_t name_len, pid_t spid) 10794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 1087d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich return check_mac_perms(str8(name, name_len), spid) ? 1 : 0; 10994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 11094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 1119b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescustruct svcinfo 11294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 11394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct svcinfo *next; 1145fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu uint32_t handle; 11594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct binder_death death; 11694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood int allow_isolated; 1179b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu size_t len; 11894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood uint16_t name[0]; 11994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood}; 12094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 1219b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescustruct svcinfo *svclist = NULL; 12294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 1239b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescustruct svcinfo *find_svc(const uint16_t *s16, size_t len) 12494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 12594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct svcinfo *si; 12694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 12794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood for (si = svclist; si; si = si->next) { 12894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if ((len == si->len) && 12994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood !memcmp(s16, si->name, len * sizeof(uint16_t))) { 13094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return si; 13194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 13294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 1339b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu return NULL; 13494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 13594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 13694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwoodvoid svcinfo_death(struct binder_state *bs, void *ptr) 13794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 1389b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu struct svcinfo *si = (struct svcinfo* ) ptr; 1399b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu 1407d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich ALOGI("service '%s' died\n", str8(si->name, si->len)); 1415fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu if (si->handle) { 1425fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu binder_release(bs, si->handle); 1435fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu si->handle = 0; 1449b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu } 14594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 14694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 1479b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescuuint16_t svcmgr_id[] = { 14894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 'a','n','d','r','o','i','d','.','o','s','.', 1499b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu 'I','S','e','r','v','i','c','e','M','a','n','a','g','e','r' 15094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood}; 15194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 1529b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu 1535fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescuuint32_t do_find_service(struct binder_state *bs, const uint16_t *s, size_t len, uid_t uid) 15494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 15594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct svcinfo *si; 15694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 1573a345f0df5f62d77e875a289e9aee89f0d1b526eSerban Constantinescu si = find_svc(s, len); 1587d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich //ALOGI("check_service('%s') handle = %x\n", str8(s, len), si ? si->handle : 0); 1595fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu if (si && si->handle) { 16094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if (!si->allow_isolated) { 16194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood // If this service doesn't allow access from isolated processes, 16294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood // then check the uid to see if it is isolated. 1639b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu uid_t appid = uid % AID_USER; 16494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if (appid >= AID_ISOLATED_START && appid <= AID_ISOLATED_END) { 16594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 0; 16694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 16794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 1685fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu return si->handle; 16994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } else { 17094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 0; 17194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 17294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 17394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 17494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwoodint do_add_service(struct binder_state *bs, 1759b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu const uint16_t *s, size_t len, 17669154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn uint32_t handle, uid_t uid, int allow_isolated, 17769154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn pid_t spid) 17894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 17994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct svcinfo *si; 1803a345f0df5f62d77e875a289e9aee89f0d1b526eSerban Constantinescu 1817d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich //ALOGI("add_service('%s',%x,%s) uid=%d\n", str8(s, len), handle, 18294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood // allow_isolated ? "allow_isolated" : "!allow_isolated", uid); 18394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 1845fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu if (!handle || (len == 0) || (len > 127)) 18594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 18694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 1877d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich if (!svc_can_register(uid, s, len, spid)) { 1885fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu ALOGE("add_service('%s',%x) uid=%d - PERMISSION DENIED\n", 1897d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich str8(s, len), handle, uid); 19094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 19194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 19294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 19394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si = find_svc(s, len); 19494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if (si) { 1955fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu if (si->handle) { 1965fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu ALOGE("add_service('%s',%x) uid=%d - ALREADY REGISTERED, OVERRIDE\n", 1977d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich str8(s, len), handle, uid); 19894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood svcinfo_death(bs, si); 19994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 2005fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu si->handle = handle; 20194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } else { 20294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si = malloc(sizeof(*si) + (len + 1) * sizeof(uint16_t)); 20394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if (!si) { 2045fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu ALOGE("add_service('%s',%x) uid=%d - OUT OF MEMORY\n", 2057d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich str8(s, len), handle, uid); 20694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 20794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 2085fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu si->handle = handle; 20994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si->len = len; 21094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood memcpy(si->name, s, (len + 1) * sizeof(uint16_t)); 21194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si->name[len] = '\0'; 2129b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu si->death.func = (void*) svcinfo_death; 21394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si->death.ptr = si; 21494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si->allow_isolated = allow_isolated; 21594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si->next = svclist; 21694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood svclist = si; 21794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 21894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 2195fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu binder_acquire(bs, handle); 2205fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu binder_link_to_death(bs, handle, &si->death); 22194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 0; 22294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 22394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 22494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwoodint svcmgr_handler(struct binder_state *bs, 225bcf38880c65297da58194eb0c0ce8d6e2bab7d94Serban Constantinescu struct binder_transaction_data *txn, 22694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct binder_io *msg, 22794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct binder_io *reply) 22894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 22994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct svcinfo *si; 23094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood uint16_t *s; 2319b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu size_t len; 2325fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu uint32_t handle; 23394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood uint32_t strict_policy; 23494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood int allow_isolated; 23594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 2363a345f0df5f62d77e875a289e9aee89f0d1b526eSerban Constantinescu //ALOGI("target=%x code=%d pid=%d uid=%d\n", 2373a345f0df5f62d77e875a289e9aee89f0d1b526eSerban Constantinescu // txn->target.handle, txn->code, txn->sender_pid, txn->sender_euid); 23894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 239bcf38880c65297da58194eb0c0ce8d6e2bab7d94Serban Constantinescu if (txn->target.handle != svcmgr_handle) 24094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 24194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 242e5245cbf5d4e830cf605ef07f5d284d7c5d2867eArve Hjønnevåg if (txn->code == PING_TRANSACTION) 243e5245cbf5d4e830cf605ef07f5d284d7c5d2867eArve Hjønnevåg return 0; 244e5245cbf5d4e830cf605ef07f5d284d7c5d2867eArve Hjønnevåg 24594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood // Equivalent to Parcel::enforceInterface(), reading the RPC 24694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood // header with the strict mode policy mask and the interface name. 24794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood // Note that we ignore the strict_policy and don't propagate it 24894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood // further (since we do no outbound RPCs anyway). 24994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood strict_policy = bio_get_uint32(msg); 25094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood s = bio_get_string16(msg, &len); 2517d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich if (s == NULL) { 2527d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich return -1; 2537d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich } 2547d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich 25594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if ((len != (sizeof(svcmgr_id) / 2)) || 25694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood memcmp(svcmgr_id, s, sizeof(svcmgr_id))) { 2577d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich fprintf(stderr,"invalid id %s\n", str8(s, len)); 25894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 25994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 26094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 26169154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn if (sehandle && selinux_status_updated() > 0) { 26269154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn struct selabel_handle *tmp_sehandle = selinux_android_service_context_handle(); 26369154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn if (tmp_sehandle) { 26469154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn selabel_close(sehandle); 26569154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn sehandle = tmp_sehandle; 26669154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn } 26769154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn } 26869154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 26994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood switch(txn->code) { 27094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood case SVC_MGR_GET_SERVICE: 27194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood case SVC_MGR_CHECK_SERVICE: 27294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood s = bio_get_string16(msg, &len); 2737d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich if (s == NULL) { 2747d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich return -1; 2757d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich } 2765fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu handle = do_find_service(bs, s, len, txn->sender_euid); 2775fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu if (!handle) 27894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood break; 2795fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu bio_put_ref(reply, handle); 28094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 0; 28194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 28294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood case SVC_MGR_ADD_SERVICE: 28394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood s = bio_get_string16(msg, &len); 2847d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich if (s == NULL) { 2857d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich return -1; 2867d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich } 2875fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu handle = bio_get_ref(msg); 28894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood allow_isolated = bio_get_uint32(msg) ? 1 : 0; 28969154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn if (do_add_service(bs, s, len, handle, txn->sender_euid, 29069154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn allow_isolated, txn->sender_pid)) 29194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 29294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood break; 29394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 29494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood case SVC_MGR_LIST_SERVICES: { 2953a345f0df5f62d77e875a289e9aee89f0d1b526eSerban Constantinescu uint32_t n = bio_get_uint32(msg); 29694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 29794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si = svclist; 29894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood while ((n-- > 0) && si) 29994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si = si->next; 30094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if (si) { 30194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood bio_put_string16(reply, si->name); 30294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 0; 30394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 30494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 30594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 30694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood default: 30794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood ALOGE("unknown code %d\n", txn->code); 30894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 30994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 31094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 31194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood bio_put_uint32(reply, 0); 31294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 0; 31394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 31494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 31569154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 31669154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahnstatic int audit_callback(void *data, security_class_t cls, char *buf, size_t len) 31769154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn{ 31869154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn snprintf(buf, len, "service=%s", !data ? "NULL" : (char *)data); 31969154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn return 0; 32069154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn} 32169154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 32294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwoodint main(int argc, char **argv) 32394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 32494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct binder_state *bs; 32594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 32694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood bs = binder_open(128*1024); 327a44542ca74b7da5b44ba30c205c3244805bb0600Serban Constantinescu if (!bs) { 328a44542ca74b7da5b44ba30c205c3244805bb0600Serban Constantinescu ALOGE("failed to open binder driver\n"); 329a44542ca74b7da5b44ba30c205c3244805bb0600Serban Constantinescu return -1; 330a44542ca74b7da5b44ba30c205c3244805bb0600Serban Constantinescu } 33194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 33294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if (binder_become_context_manager(bs)) { 33394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood ALOGE("cannot become context manager (%s)\n", strerror(errno)); 33494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 33594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 33694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 33769154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn sehandle = selinux_android_service_context_handle(); 33869154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 33969154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn union selinux_callback cb; 34069154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn cb.func_audit = audit_callback; 34169154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn selinux_set_callback(SELINUX_CB_AUDIT, cb); 34269154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn cb.func_log = selinux_log_callback; 34369154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn selinux_set_callback(SELINUX_CB_LOG, cb); 34469154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 3459b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu svcmgr_handle = BINDER_SERVICE_MANAGER; 34694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood binder_loop(bs, svcmgr_handler); 3479b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu 34894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 0; 34994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 350