This file controls socket related operations. TOMOYO checks permission using the following four parameters. * protocol type (TCP, UDP, RAW) * access type (bind, listen, connect, accept) * IPv4/IPv6 address * port number YOSHIFUJI Hideaki advised to use in4_pton() and in6_pton() rather than simple sscanf(). But they depends on CONFIG_NET=y. May I add "depends on NET" in Kconfig? Nobody tries to build TOMOYO Linux kernel without CONFIG_NET? When printing IPv6 address, I'm using "%x:%x:%x:%x:%x:%x:%x:%x" to make the output as short as possible. But using "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x" (= NIP6_FMT) is better? Signed-off-by: Kentaro Takeda Signed-off-by: Tetsuo Handa Signed-off-by: Toshiharu Harada --- fs/tomoyo_network.c | 906 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 906 insertions(+) --- /dev/null +++ linux-2.6.25-rc8-mm1/fs/tomoyo_network.c @@ -0,0 +1,906 @@ +/* + * fs/tomoyo_network.c + * + * Implementation of the Domain-Based Mandatory Access Control. + * + * Copyright (C) 2005-2008 NTT DATA CORPORATION + * + * Version: 1.6.0 2008/04/01 + * + */ + +#include +#include +#include +#include +#include +#include +#include + +/** + * audit_network_log - Audit network log. + * + * @is_ipv6: True if @address is an IPv6 address. + * @operation: The name of operation. + * @address: An IPv4 or IPv6 address. + * @port: Port number. + * @is_granted: True if this is a granted log. + * @profile: Profile number used. + * @mode: Access control mode used. + * + * Returns 0 on success, negative value otherwise. + */ +static int audit_network_log(const bool is_ipv6, const char *operation, + const char *address, const u16 port, + const bool is_granted, + const u8 profile, const u8 mode) +{ + char *buf; + int len = 256; + int len2; + if (ccs_can_save_audit_log(is_granted) < 0) + return -ENOMEM; + buf = ccs_init_audit_log(&len, profile, mode, NULL); + if (!buf) + return -ENOMEM; + len2 = strlen(buf); + snprintf(buf + len2, len - len2 - 1, KEYWORD_ALLOW_NETWORK "%s %s %u\n", + operation, address, port); + return ccs_write_audit_log(buf, is_granted); +} + +/** + * save_ipv6_address - Keep the given IPv6 address on the RAM. + * + * @addr: Pointer to "struct in6_addr". + * + * Returns pointer to "struct in6_addr" on success, NULL otherwise. + * + * The RAM is shared, so NEVER try to modify or kfree() the returned address. + */ +static const struct in6_addr *save_ipv6_address(const struct in6_addr *addr) +{ + static const u8 block_size = 16; + struct addr_list { + struct in6_addr addr[block_size]; + struct list1_head list; + u32 in_use_count; + }; + static LIST1_HEAD(address_list); + struct addr_list *ptr; + static DEFINE_MUTEX(lock); + u8 i = block_size; + if (!addr) + return NULL; + mutex_lock(&lock); + list1_for_each_entry(ptr, &address_list, list) { + for (i = 0; i < ptr->in_use_count; i++) { + if (!memcmp(&ptr->addr[i], addr, sizeof(*addr))) + goto ok; + } + if (i < block_size) + break; + } + if (i == block_size) { + ptr = ccs_alloc_element(sizeof(*ptr)); + if (!ptr) + goto ok; + list1_add_tail_mb(&ptr->list, &address_list); + i = 0; + } + ptr->addr[ptr->in_use_count++] = *addr; + ok: + mutex_unlock(&lock); + return ptr ? &ptr->addr[i] : NULL; +} + +/* The list for "struct address_group_entry". */ +static LIST1_HEAD(address_group_list); + +/** + * update_address_group_entry - Update "struct address_group_entry" list. + * + * @group_name: The name of address group. + * @is_ipv6: True if @min_address and @max_address are IPv6 addresses. + * @min_address: Start of IPv4 or IPv6 address range. + * @max_address: End of IPv4 or IPv6 address range. + * @is_delete: True if it is a delete request. + * + * Returns 0 on success, negative value otherwise. + */ +static int update_address_group_entry(const char *group_name, + const bool is_ipv6, + const u16 *min_address, + const u16 *max_address, + const bool is_delete) +{ + static DEFINE_MUTEX(lock); + struct address_group_entry *new_group; + struct address_group_entry *group; + struct address_group_member *new_member; + struct address_group_member *member; + const struct path_info *saved_group_name; + const struct in6_addr *saved_min_address = NULL; + const struct in6_addr *saved_max_address = NULL; + int error = -ENOMEM; + bool found = false; + if (!ccs_is_correct_path(group_name, 0, 0, 0, __func__) || + !group_name[0]) + return -EINVAL; + saved_group_name = ccs_save_name(group_name); + if (!saved_group_name) + return -ENOMEM; + if (!is_ipv6) + goto not_ipv6; + saved_min_address + = save_ipv6_address((struct in6_addr *) min_address); + saved_max_address + = save_ipv6_address((struct in6_addr *) max_address); + if (!saved_min_address || !saved_max_address) + return -ENOMEM; + not_ipv6: + mutex_lock(&lock); + list1_for_each_entry(group, &address_group_list, list) { + if (saved_group_name != group->group_name) + continue; + list1_for_each_entry(member, &group->address_group_member_list, + list) { + if (member->is_ipv6 != is_ipv6) + continue; + if (is_ipv6) { + if (member->min.ipv6 != saved_min_address || + member->max.ipv6 != saved_max_address) + continue; + } else { + if (member->min.ipv4 != *(u32 *) min_address || + member->max.ipv4 != *(u32 *) max_address) + continue; + } + member->is_deleted = is_delete; + error = 0; + goto out; + } + found = true; + break; + } + if (is_delete) { + error = -ENOENT; + goto out; + } + if (!found) { + new_group = ccs_alloc_element(sizeof(*new_group)); + if (!new_group) + goto out; + INIT_LIST1_HEAD(&new_group->address_group_member_list); + new_group->group_name = saved_group_name; + list1_add_tail_mb(&new_group->list, &address_group_list); + group = new_group; + } + new_member = ccs_alloc_element(sizeof(*new_member)); + if (!new_member) + goto out; + new_member->is_ipv6 = is_ipv6; + if (is_ipv6) { + new_member->min.ipv6 = saved_min_address; + new_member->max.ipv6 = saved_max_address; + } else { + new_member->min.ipv4 = *(u32 *) min_address; + new_member->max.ipv4 = *(u32 *) max_address; + } + list1_add_tail_mb(&new_member->list, &group->address_group_member_list); + error = 0; + out: + mutex_unlock(&lock); + ccs_update_counter(CCS_UPDATES_COUNTER_EXCEPTION_POLICY); + return error; +} + +/** + * ccs_write_address_group_policy - Write "struct address_group_entry" list. + * + * @data: String to parse. + * @is_delete: True if it is a delete request. + * + * Returns 0 on success, negative value otherwise. + */ +int ccs_write_address_group_policy(char *data, const bool is_delete) +{ + u8 count; + bool is_ipv6; + u16 min_address[8]; + u16 max_address[8]; + char *cp = strchr(data, ' '); + if (!cp) + return -EINVAL; + *cp++ = '\0'; + count = sscanf(cp, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx" + "-%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", + &min_address[0], &min_address[1], + &min_address[2], &min_address[3], + &min_address[4], &min_address[5], + &min_address[6], &min_address[7], + &max_address[0], &max_address[1], + &max_address[2], &max_address[3], + &max_address[4], &max_address[5], + &max_address[6], &max_address[7]); + if (count == 8 || count == 16) { + u8 i; + for (i = 0; i < 8; i++) { + min_address[i] = htons(min_address[i]); + max_address[i] = htons(max_address[i]); + } + if (count == 8) + memmove(max_address, min_address, sizeof(min_address)); + is_ipv6 = true; + goto ok; + } + count = sscanf(cp, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", + &min_address[0], &min_address[1], + &min_address[2], &min_address[3], + &max_address[0], &max_address[1], + &max_address[2], &max_address[3]); + if (count == 4 || count == 8) { + u32 ip = ((((u8) min_address[0]) << 24) + + (((u8) min_address[1]) << 16) + + (((u8) min_address[2]) << 8) + + (u8) min_address[3]); + *(u32 *) min_address = ip; + if (count == 8) + ip = ((((u8) max_address[0]) << 24) + + (((u8) max_address[1]) << 16) + + (((u8) max_address[2]) << 8) + + (u8) max_address[3]); + *(u32 *) max_address = ip; + is_ipv6 = false; + goto ok; + } + return -EINVAL; + ok: + return update_address_group_entry(data, is_ipv6, + min_address, max_address, is_delete); +} + +/** + * find_or_assign_new_address_group - Create address group. + * + * @group_name: The name of address group. + * + * Returns pointer to "struct address_group_entry" on success, NULL otherwise. + */ +static struct address_group_entry * +find_or_assign_new_address_group(const char *group_name) +{ + u8 i; + struct address_group_entry *group; + for (i = 0; i <= 1; i++) { + list1_for_each_entry(group, &address_group_list, list) { + if (!strcmp(group_name, group->group_name->name)) + return group; + } + if (!i) { + const u16 dummy[2] = { 0, 0 }; + update_address_group_entry(group_name, false, + dummy, dummy, false); + update_address_group_entry(group_name, false, + dummy, dummy, true); + } + } + return NULL; +} + +/** + * address_matches_to_group - Check whether the given address matches members of the given address group. + * + * @is_ipv6: True if @address is an IPv6 address. + * @address: An IPv4 or IPv6 address. + * @group: Pointer to "struct address_group_entry". + * + * Returns true if @address matches addresses in @group group, false otherwise. + */ +static bool address_matches_to_group(const bool is_ipv6, const u32 *address, + const struct address_group_entry *group) +{ + struct address_group_member *member; + const u32 ip = ntohl(*address); + list1_for_each_entry(member, &group->address_group_member_list, list) { + if (member->is_deleted) + continue; + if (member->is_ipv6) { + if (is_ipv6 && + memcmp(member->min.ipv6, address, 16) <= 0 && + memcmp(address, member->max.ipv6, 16) <= 0) + return true; + } else { + if (!is_ipv6 && + member->min.ipv4 <= ip && ip <= member->max.ipv4) + return true; + } + } + return false; +} + +/** + * ccs_read_address_group_policy - Read "struct address_group_entry" list. + * + * @head: Pointer to "struct ccs_io_buffer". + * + * Returns true on success, false otherwise. + */ +bool ccs_read_address_group_policy(struct ccs_io_buffer *head) +{ + struct list1_head *gpos; + struct list1_head *mpos; + list1_for_each_cookie(gpos, head->read_var1, &address_group_list) { + struct address_group_entry *group; + group = list1_entry(gpos, struct address_group_entry, list); + list1_for_each_cookie(mpos, head->read_var2, + &group->address_group_member_list) { + char buf[128]; + struct address_group_member *member; + member = list1_entry(mpos, struct address_group_member, + list); + if (member->is_deleted) + continue; + if (member->is_ipv6) { + const struct in6_addr *min_address + = member->min.ipv6; + const struct in6_addr *max_address + = member->max.ipv6; + ccs_print_ipv6(buf, sizeof(buf), min_address); + if (min_address != max_address) { + int len; + char *cp = strchr(buf, '\0'); + *cp++ = '-'; + len = strlen(buf); + ccs_print_ipv6(cp, sizeof(buf) - len, + max_address); + } + } else { + const u32 min_address = member->min.ipv4; + const u32 max_address = member->max.ipv4; + memset(buf, 0, sizeof(buf)); + snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", + HIPQUAD(min_address)); + if (min_address != max_address) { + const int len = strlen(buf); + snprintf(buf + len, + sizeof(buf) - 1 - len, + "-%u.%u.%u.%u", + HIPQUAD(max_address)); + } + } + if (!ccs_io_printf(head, KEYWORD_ADDRESS_GROUP + "%s %s\n", group->group_name->name, + buf)) + goto out; + } + } + return true; + out: + return false; +} + +/** + * ccs_print_ipv6 - Print an IPv6 address. + * + * @buffer: Buffer to write to. + * @buffer_len: Size of @buffer. + * @ip: Pointer to "struct in6_addr". + * + * Returns nothing. + */ +void ccs_print_ipv6(char *buffer, const int buffer_len, + const struct in6_addr *ip) +{ + memset(buffer, 0, buffer_len); + snprintf(buffer, buffer_len - 1, "%x:%x:%x:%x:%x:%x:%x:%x", NIP6(*ip)); +} + +/** + * ccs_net2keyword - Convert network operation index to network operation name. + * + * @operation: Type of operation. + * + * Returns the name of operation. + */ +const char *ccs_net2keyword(const u8 operation) +{ + const char *keyword = "unknown"; + switch (operation) { + case NETWORK_ACL_UDP_BIND: + keyword = "UDP bind"; + break; + case NETWORK_ACL_UDP_CONNECT: + keyword = "UDP connect"; + break; + case NETWORK_ACL_TCP_BIND: + keyword = "TCP bind"; + break; + case NETWORK_ACL_TCP_LISTEN: + keyword = "TCP listen"; + break; + case NETWORK_ACL_TCP_CONNECT: + keyword = "TCP connect"; + break; + case NETWORK_ACL_TCP_ACCEPT: + keyword = "TCP accept"; + break; + case NETWORK_ACL_RAW_BIND: + keyword = "RAW bind"; + break; + case NETWORK_ACL_RAW_CONNECT: + keyword = "RAW connect"; + break; + } + return keyword; +} + +/** + * update_network_entry - Update "struct ip_network_acl_record" list. + * + * @operation: Type of operation. + * @record_type: Type of address. + * @group: Pointer to "struct address_group_entry". May be NULL. + * @min_address: Start of IPv4 or IPv6 address range. + * @max_address: End of IPv4 or IPv6 address range. + * @min_port: Start of port number range. + * @max_port: End of port number range. + * @domain: Pointer to "struct domain_info". + * @condition: Pointer to "struct condition_list". May be NULL. + * @is_delete: True if it is a delete request. + * + * Returns 0 on success, negative value otherwise. + */ +static int update_network_entry(const u8 operation, const u8 record_type, + const struct address_group_entry *group, + const u32 *min_address, const u32 *max_address, + const u16 min_port, const u16 max_port, + struct domain_info *domain, + const struct condition_list *condition, + const bool is_delete) +{ + struct acl_info *ptr; + struct ip_network_acl_record *acl; + int error = -ENOMEM; + /* using host byte order to allow u32 comparison than memcmp().*/ + const u32 min_ip = ntohl(*min_address); + const u32 max_ip = ntohl(*max_address); + const struct in6_addr *saved_min_address = NULL; + const struct in6_addr *saved_max_address = NULL; + if (!domain) + return -EINVAL; + if (record_type != IP_RECORD_TYPE_IPv6) + goto not_ipv6; + saved_min_address = save_ipv6_address((struct in6_addr *) min_address); + saved_max_address = save_ipv6_address((struct in6_addr *) max_address); + if (!saved_min_address || !saved_max_address) + return -ENOMEM; + not_ipv6: + mutex_lock(&domain_acl_lock); + if (is_delete) + goto delete; + list1_for_each_entry(ptr, &domain->acl_info_list, list) { + if (ccs_acl_type1(ptr) != TYPE_IP_NETWORK_ACL) + continue; + if (ccs_get_condition_part(ptr) != condition) + continue; + acl = container_of(ptr, struct ip_network_acl_record, head); + if (acl->operation_type != operation || + acl->record_type != record_type || + acl->min_port != min_port || max_port != acl->max_port) + continue; + if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { + if (acl->u.group != group) + continue; + } else if (record_type == IP_RECORD_TYPE_IPv4) { + if (acl->u.ipv4.min != min_ip || + max_ip != acl->u.ipv4.max) + continue; + } else if (record_type == IP_RECORD_TYPE_IPv6) { + if (acl->u.ipv6.min != saved_min_address || + saved_max_address != acl->u.ipv6.max) + continue; + } + error = ccs_add_domain_acl(NULL, ptr); + goto out; + } + /* Not found. Append it to the tail. */ + acl = ccs_alloc_acl_element(TYPE_IP_NETWORK_ACL, condition); + if (!acl) + goto out; + acl->operation_type = operation; + acl->record_type = record_type; + if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { + acl->u.group = group; + } else if (record_type == IP_RECORD_TYPE_IPv4) { + acl->u.ipv4.min = min_ip; + acl->u.ipv4.max = max_ip; + } else { + acl->u.ipv6.min = saved_min_address; + acl->u.ipv6.max = saved_max_address; + } + acl->min_port = min_port; + acl->max_port = max_port; + error = ccs_add_domain_acl(domain, &acl->head); + goto out; + delete: + error = -ENOENT; + list1_for_each_entry(ptr, &domain->acl_info_list, list) { + if (ccs_acl_type2(ptr) != TYPE_IP_NETWORK_ACL) + continue; + if (ccs_get_condition_part(ptr) != condition) + continue; + acl = container_of(ptr, struct ip_network_acl_record, head); + if (acl->operation_type != operation || + acl->record_type != record_type || + acl->min_port != min_port || max_port != acl->max_port) + continue; + if (record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { + if (acl->u.group != group) + continue; + } else if (record_type == IP_RECORD_TYPE_IPv4) { + if (acl->u.ipv4.min != min_ip || + max_ip != acl->u.ipv4.max) + continue; + } else if (record_type == IP_RECORD_TYPE_IPv6) { + if (acl->u.ipv6.min != saved_min_address || + saved_max_address != acl->u.ipv6.max) + continue; + } + error = ccs_del_domain_acl(ptr); + break; + } + out: + mutex_unlock(&domain_acl_lock); + return error; +} + +/** + * check_network_entry - Check permission for network operation. + * + * @is_ipv6: True if @address is an IPv6 address. + * @operation: Type of operation. + * @address: An IPv4 or IPv6 address. + * @port: Port number. + * + * Returns 0 on success, negative value otherwise. + */ +static int check_network_entry(const bool is_ipv6, const u8 operation, + const u32 *address, const u16 port) +{ + struct domain_info * const domain = current->domain_info; + struct acl_info *ptr; + const char *keyword = ccs_net2keyword(operation); + const u8 profile = current->domain_info->profile; + const u8 mode = ccs_check_flags(CCS_TOMOYO_MAC_FOR_NETWORK); + const bool is_enforce = (mode == 3); + /* using host byte order to allow u32 comparison than memcmp().*/ + const u32 ip = ntohl(*address); + bool found = false; + char buf[64]; + if (!mode) + return 0; + list1_for_each_entry(ptr, &domain->acl_info_list, list) { + struct ip_network_acl_record *acl; + if (ccs_acl_type2(ptr) != TYPE_IP_NETWORK_ACL) + continue; + acl = container_of(ptr, struct ip_network_acl_record, head); + if (acl->operation_type != operation || port < acl->min_port || + acl->max_port < port || !ccs_check_condition(ptr, NULL)) + continue; + if (acl->record_type == IP_RECORD_TYPE_ADDRESS_GROUP) { + if (!address_matches_to_group(is_ipv6, address, + acl->u.group)) + continue; + } else if (acl->record_type == IP_RECORD_TYPE_IPv4) { + if (is_ipv6 || + ip < acl->u.ipv4.min || acl->u.ipv4.max < ip) + continue; + } else { + if (!is_ipv6 || + memcmp(acl->u.ipv6.min, address, 16) > 0 || + memcmp(address, acl->u.ipv6.max, 16) > 0) + continue; + } + ccs_update_condition(ptr); + found = true; + break; + } + memset(buf, 0, sizeof(buf)); + if (is_ipv6) + ccs_print_ipv6(buf, sizeof(buf), + (const struct in6_addr *) address); + else + snprintf(buf, sizeof(buf) - 1, "%u.%u.%u.%u", HIPQUAD(ip)); + audit_network_log(is_ipv6, keyword, buf, port, found, profile, mode); + if (found) + return 0; + if (ccs_verbose_mode()) + printk(KERN_WARNING "TOMOYO-%s: %s to %s %u denied for %s\n", + ccs_get_msg(is_enforce), keyword, buf, port, + ccs_get_last_name(domain)); + if (is_enforce) + return ccs_check_supervisor("%s\n" KEYWORD_ALLOW_NETWORK "%s " + "%s %u\n", domain->domainname->name, + keyword, buf, port); + if (mode == 1 && ccs_check_domain_quota(domain)) + update_network_entry(operation, is_ipv6 ? + IP_RECORD_TYPE_IPv6 : IP_RECORD_TYPE_IPv4, + NULL, address, address, port, port, domain, + NULL, 0); + return 0; +} + +/** + * ccs_write_network_policy - Write "struct ip_network_acl_record" list. + * + * @data: String to parse. + * @domain: Pointer to "struct domain_info". + * @condition: Pointer to "struct condition_list". May be NULL. + * @is_delete: True if it is a delete request. + * + * Returns 0 on success, negative value otherwise. + */ +int ccs_write_network_policy(char *data, struct domain_info *domain, + const struct condition_list *condition, + const bool is_delete) +{ + u8 sock_type; + u8 operation; + u8 record_type; + u16 min_address[8]; + u16 max_address[8]; + struct address_group_entry *group = NULL; + u16 min_port; + u16 max_port; + u8 count; + char *cp1 = strchr(data, ' '); + char *cp2; + if (!cp1) + goto out; + cp1++; + if (!strncmp(data, "TCP ", 4)) + sock_type = SOCK_STREAM; + else if (!strncmp(data, "UDP ", 4)) + sock_type = SOCK_DGRAM; + else if (!strncmp(data, "RAW ", 4)) + sock_type = SOCK_RAW; + else + goto out; + cp2 = strchr(cp1, ' '); + if (!cp2) + goto out; + cp2++; + if (!strncmp(cp1, "bind ", 5)) + switch (sock_type) { + case SOCK_STREAM: + operation = NETWORK_ACL_TCP_BIND; + break; + case SOCK_DGRAM: + operation = NETWORK_ACL_UDP_BIND; + break; + default: + operation = NETWORK_ACL_RAW_BIND; + } + else if (!strncmp(cp1, "connect ", 8)) + switch (sock_type) { + case SOCK_STREAM: + operation = NETWORK_ACL_TCP_CONNECT; + break; + case SOCK_DGRAM: + operation = NETWORK_ACL_UDP_CONNECT; + break; + default: + operation = NETWORK_ACL_RAW_CONNECT; + } + else if (sock_type == SOCK_STREAM && !strncmp(cp1, "listen ", 7)) + operation = NETWORK_ACL_TCP_LISTEN; + else if (sock_type == SOCK_STREAM && !strncmp(cp1, "accept ", 7)) + operation = NETWORK_ACL_TCP_ACCEPT; + else + goto out; + cp1 = strchr(cp2, ' '); + if (!cp1) + goto out; + *cp1++ = '\0'; + count = sscanf(cp2, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx" + "-%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx", + &min_address[0], &min_address[1], + &min_address[2], &min_address[3], + &min_address[4], &min_address[5], + &min_address[6], &min_address[7], + &max_address[0], &max_address[1], + &max_address[2], &max_address[3], + &max_address[4], &max_address[5], + &max_address[6], &max_address[7]); + if (count == 8 || count == 16) { + u8 i; + for (i = 0; i < 8; i++) { + min_address[i] = htons(min_address[i]); + max_address[i] = htons(max_address[i]); + } + if (count == 8) + memmove(max_address, min_address, sizeof(min_address)); + record_type = IP_RECORD_TYPE_IPv6; + goto ok; + } + count = sscanf(cp2, "%hu.%hu.%hu.%hu-%hu.%hu.%hu.%hu", + &min_address[0], &min_address[1], + &min_address[2], &min_address[3], + &max_address[0], &max_address[1], + &max_address[2], &max_address[3]); + if (count == 4 || count == 8) { + u32 ip = htonl((((u8) min_address[0]) << 24) + + (((u8) min_address[1]) << 16) + + (((u8) min_address[2]) << 8) + + (u8) min_address[3]); + *(u32 *) min_address = ip; + if (count == 8) + ip = htonl((((u8) max_address[0]) << 24) + + (((u8) max_address[1]) << 16) + + (((u8) max_address[2]) << 8) + + (u8) max_address[3]); + *(u32 *) max_address = ip; + record_type = IP_RECORD_TYPE_IPv4; + goto ok; + } + if (*cp2 == '@') { + group = find_or_assign_new_address_group(cp2 + 1); + if (!group) + return -ENOMEM; + record_type = IP_RECORD_TYPE_ADDRESS_GROUP; + goto ok; + } + out: + return -EINVAL; + ok: + if (strchr(cp1, ' ')) + goto out; + count = sscanf(cp1, "%hu-%hu", &min_port, &max_port); + if (count != 1 && count != 2) + goto out; + if (count == 1) + max_port = min_port; + return update_network_entry(operation, record_type, group, + (u32 *) min_address, (u32 *) max_address, + min_port, max_port, domain, condition, + is_delete); +} + +/** + * ccs_check_network_listen_acl - Check permission for listen() operation. + * + * @is_ipv6: True if @address is an IPv6 address. + * @address: An IPv4 or IPv6 address. + * @port: Port number. + * + * Returns 0 on success, negative value otherwise. + */ +int ccs_check_network_listen_acl(const bool is_ipv6, const u8 *address, + const u16 port) +{ + return check_network_entry(is_ipv6, NETWORK_ACL_TCP_LISTEN, + (const u32 *) address, ntohs(port)); +} + +/** + * ccs_check_network_connect_acl - Check permission for connect() operation. + * + * @is_ipv6: True if @address is an IPv6 address. + * @sock_type: Type of socket. (TCP or UDP or RAW) + * @address: An IPv4 or IPv6 address. + * @port: Port number. + * + * Returns 0 on success, negative value otherwise. + */ +int ccs_check_network_connect_acl(const bool is_ipv6, const int sock_type, + const u8 *address, const u16 port) +{ + u8 operation; + switch (sock_type) { + case SOCK_STREAM: + operation = NETWORK_ACL_TCP_CONNECT; + break; + case SOCK_DGRAM: + operation = NETWORK_ACL_UDP_CONNECT; + break; + default: + operation = NETWORK_ACL_RAW_CONNECT; + } + return check_network_entry(is_ipv6, operation, (const u32 *) address, + ntohs(port)); +} + +/** + * ccs_check_network_bind_acl - Check permission for bind() operation. + * + * @is_ipv6: True if @address is an IPv6 address. + * @sock_type: Type of socket. (TCP or UDP or RAW) + * @address: An IPv4 or IPv6 address. + * @port: Port number. + * + * Returns 0 on success, negative value otherwise. + */ +int ccs_check_network_bind_acl(const bool is_ipv6, const int sock_type, + const u8 *address, const u16 port) +{ + u8 operation; + switch (sock_type) { + case SOCK_STREAM: + operation = NETWORK_ACL_TCP_BIND; + break; + case SOCK_DGRAM: + operation = NETWORK_ACL_UDP_BIND; + break; + default: + operation = NETWORK_ACL_RAW_BIND; + } + return check_network_entry(is_ipv6, operation, (const u32 *) address, + ntohs(port)); +} + +/** + * ccs_check_network_accept_acl - Check permission for accept() operation. + * + * @is_ipv6: True if @address is an IPv6 address. + * @address: An IPv4 or IPv6 address. + * @port: Port number. + * + * Returns 0 on success, negative value otherwise. + */ +int ccs_check_network_accept_acl(const bool is_ipv6, const u8 *address, + const u16 port) +{ + int retval; + current->tomoyo_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; + retval = check_network_entry(is_ipv6, NETWORK_ACL_TCP_ACCEPT, + (const u32 *) address, ntohs(port)); + current->tomoyo_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; + return retval; +} + +/** + * ccs_check_network_sendmsg_acl - Check permission for sendmsg() operation. + * + * @is_ipv6: True if @address is an IPv6 address. + * @sock_type: Type of socket. (UDP or RAW) + * @address: An IPv4 or IPv6 address. + * @port: Port number. + * + * Returns 0 on success, negative value otherwise. + */ +int ccs_check_network_sendmsg_acl(const bool is_ipv6, const int sock_type, + const u8 *address, const u16 port) +{ + u8 operation; + if (sock_type == SOCK_DGRAM) + operation = NETWORK_ACL_UDP_CONNECT; + else + operation = NETWORK_ACL_RAW_CONNECT; + return check_network_entry(is_ipv6, operation, (const u32 *) address, + ntohs(port)); +} + +/** + * ccs_check_network_recvmsg_acl - Check permission for recvmsg() operation. + * + * @is_ipv6: True if @address is an IPv6 address. + * @sock_type: Type of socket. (UDP or RAW) + * @address: An IPv4 or IPv6 address. + * @port: Port number. + * + * Returns 0 on success, negative value otherwise. + */ +int ccs_check_network_recvmsg_acl(const bool is_ipv6, const int sock_type, + const u8 *address, const u16 port) +{ + int retval; + const u8 operation + = (sock_type == SOCK_DGRAM) ? + NETWORK_ACL_UDP_CONNECT : NETWORK_ACL_RAW_CONNECT; + current->tomoyo_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; + retval = check_network_entry(is_ipv6, operation, (const u32 *) address, + ntohs(port)); + current->tomoyo_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; + return retval; +} -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/