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![Tetsuo Handa](/assets/img/avatar_default.png)
This patch adds support for permission checks for PF_INET/PF_INET6/PF_UNIX socket's bind()/listen()/connect()/send() operations. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
771 lines
21 KiB
C
771 lines
21 KiB
C
/*
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* security/tomoyo/network.c
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*
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* Copyright (C) 2005-2011 NTT DATA CORPORATION
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*/
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#include "common.h"
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#include <linux/slab.h>
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/* Structure for holding inet domain socket's address. */
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struct tomoyo_inet_addr_info {
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__be16 port; /* In network byte order. */
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const __be32 *address; /* In network byte order. */
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bool is_ipv6;
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};
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/* Structure for holding unix domain socket's address. */
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struct tomoyo_unix_addr_info {
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u8 *addr; /* This may not be '\0' terminated string. */
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unsigned int addr_len;
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};
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/* Structure for holding socket address. */
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struct tomoyo_addr_info {
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u8 protocol;
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u8 operation;
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struct tomoyo_inet_addr_info inet;
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struct tomoyo_unix_addr_info unix0;
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};
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/* String table for socket's protocols. */
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const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX] = {
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[SOCK_STREAM] = "stream",
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[SOCK_DGRAM] = "dgram",
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[SOCK_RAW] = "raw",
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[SOCK_SEQPACKET] = "seqpacket",
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[0] = " ", /* Dummy for avoiding NULL pointer dereference. */
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[4] = " ", /* Dummy for avoiding NULL pointer dereference. */
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};
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/**
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* tomoyo_parse_ipaddr_union - Parse an IP address.
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*
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* @param: Pointer to "struct tomoyo_acl_param".
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* @ptr: Pointer to "struct tomoyo_ipaddr_union".
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*
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* Returns true on success, false otherwise.
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*/
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bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
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struct tomoyo_ipaddr_union *ptr)
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{
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u8 * const min = ptr->ip[0].in6_u.u6_addr8;
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u8 * const max = ptr->ip[1].in6_u.u6_addr8;
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char *address = tomoyo_read_token(param);
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const char *end;
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if (!strchr(address, ':') &&
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in4_pton(address, -1, min, '-', &end) > 0) {
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ptr->is_ipv6 = false;
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if (!*end)
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ptr->ip[1].s6_addr32[0] = ptr->ip[0].s6_addr32[0];
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else if (*end++ != '-' ||
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in4_pton(end, -1, max, '\0', &end) <= 0 || *end)
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return false;
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return true;
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}
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if (in6_pton(address, -1, min, '-', &end) > 0) {
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ptr->is_ipv6 = true;
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if (!*end)
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memmove(max, min, sizeof(u16) * 8);
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else if (*end++ != '-' ||
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in6_pton(end, -1, max, '\0', &end) <= 0 || *end)
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return false;
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return true;
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}
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return false;
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}
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/**
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* tomoyo_print_ipv4 - Print an IPv4 address.
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*
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* @buffer: Buffer to write to.
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* @buffer_len: Size of @buffer.
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* @min_ip: Pointer to __be32.
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* @max_ip: Pointer to __be32.
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*
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* Returns nothing.
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*/
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static void tomoyo_print_ipv4(char *buffer, const unsigned int buffer_len,
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const __be32 *min_ip, const __be32 *max_ip)
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{
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snprintf(buffer, buffer_len, "%pI4%c%pI4", min_ip,
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*min_ip == *max_ip ? '\0' : '-', max_ip);
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}
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/**
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* tomoyo_print_ipv6 - Print an IPv6 address.
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*
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* @buffer: Buffer to write to.
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* @buffer_len: Size of @buffer.
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* @min_ip: Pointer to "struct in6_addr".
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* @max_ip: Pointer to "struct in6_addr".
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*
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* Returns nothing.
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*/
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static void tomoyo_print_ipv6(char *buffer, const unsigned int buffer_len,
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const struct in6_addr *min_ip,
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const struct in6_addr *max_ip)
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{
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snprintf(buffer, buffer_len, "%pI6c%c%pI6c", min_ip,
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!memcmp(min_ip, max_ip, 16) ? '\0' : '-', max_ip);
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}
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/**
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* tomoyo_print_ip - Print an IP address.
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*
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* @buf: Buffer to write to.
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* @size: Size of @buf.
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* @ptr: Pointer to "struct ipaddr_union".
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*
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* Returns nothing.
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*/
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void tomoyo_print_ip(char *buf, const unsigned int size,
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const struct tomoyo_ipaddr_union *ptr)
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{
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if (ptr->is_ipv6)
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tomoyo_print_ipv6(buf, size, &ptr->ip[0], &ptr->ip[1]);
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else
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tomoyo_print_ipv4(buf, size, &ptr->ip[0].s6_addr32[0],
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&ptr->ip[1].s6_addr32[0]);
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}
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/*
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* Mapping table from "enum tomoyo_network_acl_index" to
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* "enum tomoyo_mac_index" for inet domain socket.
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*/
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static const u8 tomoyo_inet2mac
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[TOMOYO_SOCK_MAX][TOMOYO_MAX_NETWORK_OPERATION] = {
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[SOCK_STREAM] = {
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[TOMOYO_NETWORK_BIND] = TOMOYO_MAC_NETWORK_INET_STREAM_BIND,
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[TOMOYO_NETWORK_LISTEN] =
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TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN,
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[TOMOYO_NETWORK_CONNECT] =
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TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT,
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},
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[SOCK_DGRAM] = {
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[TOMOYO_NETWORK_BIND] = TOMOYO_MAC_NETWORK_INET_DGRAM_BIND,
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[TOMOYO_NETWORK_SEND] = TOMOYO_MAC_NETWORK_INET_DGRAM_SEND,
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},
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[SOCK_RAW] = {
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[TOMOYO_NETWORK_BIND] = TOMOYO_MAC_NETWORK_INET_RAW_BIND,
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[TOMOYO_NETWORK_SEND] = TOMOYO_MAC_NETWORK_INET_RAW_SEND,
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},
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};
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/*
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* Mapping table from "enum tomoyo_network_acl_index" to
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* "enum tomoyo_mac_index" for unix domain socket.
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*/
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static const u8 tomoyo_unix2mac
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[TOMOYO_SOCK_MAX][TOMOYO_MAX_NETWORK_OPERATION] = {
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[SOCK_STREAM] = {
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[TOMOYO_NETWORK_BIND] = TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND,
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[TOMOYO_NETWORK_LISTEN] =
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TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN,
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[TOMOYO_NETWORK_CONNECT] =
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TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT,
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},
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[SOCK_DGRAM] = {
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[TOMOYO_NETWORK_BIND] = TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND,
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[TOMOYO_NETWORK_SEND] = TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND,
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},
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[SOCK_SEQPACKET] = {
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[TOMOYO_NETWORK_BIND] =
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TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND,
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[TOMOYO_NETWORK_LISTEN] =
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TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
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[TOMOYO_NETWORK_CONNECT] =
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TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
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},
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};
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/**
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* tomoyo_same_inet_acl - Check for duplicated "struct tomoyo_inet_acl" entry.
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*
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* @a: Pointer to "struct tomoyo_acl_info".
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* @b: Pointer to "struct tomoyo_acl_info".
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*
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* Returns true if @a == @b except permission bits, false otherwise.
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*/
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static bool tomoyo_same_inet_acl(const struct tomoyo_acl_info *a,
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const struct tomoyo_acl_info *b)
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{
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const struct tomoyo_inet_acl *p1 = container_of(a, typeof(*p1), head);
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const struct tomoyo_inet_acl *p2 = container_of(b, typeof(*p2), head);
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return p1->protocol == p2->protocol &&
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tomoyo_same_ipaddr_union(&p1->address, &p2->address) &&
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tomoyo_same_number_union(&p1->port, &p2->port);
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}
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/**
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* tomoyo_same_unix_acl - Check for duplicated "struct tomoyo_unix_acl" entry.
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*
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* @a: Pointer to "struct tomoyo_acl_info".
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* @b: Pointer to "struct tomoyo_acl_info".
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*
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* Returns true if @a == @b except permission bits, false otherwise.
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*/
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static bool tomoyo_same_unix_acl(const struct tomoyo_acl_info *a,
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const struct tomoyo_acl_info *b)
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{
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const struct tomoyo_unix_acl *p1 = container_of(a, typeof(*p1), head);
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const struct tomoyo_unix_acl *p2 = container_of(b, typeof(*p2), head);
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return p1->protocol == p2->protocol &&
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tomoyo_same_name_union(&p1->name, &p2->name);
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}
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/**
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* tomoyo_merge_inet_acl - Merge duplicated "struct tomoyo_inet_acl" entry.
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*
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* @a: Pointer to "struct tomoyo_acl_info".
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* @b: Pointer to "struct tomoyo_acl_info".
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* @is_delete: True for @a &= ~@b, false for @a |= @b.
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*
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* Returns true if @a is empty, false otherwise.
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*/
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static bool tomoyo_merge_inet_acl(struct tomoyo_acl_info *a,
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struct tomoyo_acl_info *b,
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const bool is_delete)
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{
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u8 * const a_perm =
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&container_of(a, struct tomoyo_inet_acl, head)->perm;
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u8 perm = *a_perm;
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const u8 b_perm = container_of(b, struct tomoyo_inet_acl, head)->perm;
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if (is_delete)
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perm &= ~b_perm;
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else
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perm |= b_perm;
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*a_perm = perm;
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return !perm;
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}
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/**
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* tomoyo_merge_unix_acl - Merge duplicated "struct tomoyo_unix_acl" entry.
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*
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* @a: Pointer to "struct tomoyo_acl_info".
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* @b: Pointer to "struct tomoyo_acl_info".
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* @is_delete: True for @a &= ~@b, false for @a |= @b.
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*
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* Returns true if @a is empty, false otherwise.
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*/
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static bool tomoyo_merge_unix_acl(struct tomoyo_acl_info *a,
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struct tomoyo_acl_info *b,
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const bool is_delete)
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{
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u8 * const a_perm =
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&container_of(a, struct tomoyo_unix_acl, head)->perm;
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u8 perm = *a_perm;
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const u8 b_perm = container_of(b, struct tomoyo_unix_acl, head)->perm;
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if (is_delete)
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perm &= ~b_perm;
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else
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perm |= b_perm;
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*a_perm = perm;
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return !perm;
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}
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/**
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* tomoyo_write_inet_network - Write "struct tomoyo_inet_acl" list.
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*
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* @param: Pointer to "struct tomoyo_acl_param".
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*
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* Returns 0 on success, negative value otherwise.
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*
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* Caller holds tomoyo_read_lock().
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*/
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int tomoyo_write_inet_network(struct tomoyo_acl_param *param)
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{
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struct tomoyo_inet_acl e = { .head.type = TOMOYO_TYPE_INET_ACL };
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int error = -EINVAL;
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u8 type;
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const char *protocol = tomoyo_read_token(param);
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const char *operation = tomoyo_read_token(param);
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for (e.protocol = 0; e.protocol < TOMOYO_SOCK_MAX; e.protocol++)
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if (!strcmp(protocol, tomoyo_proto_keyword[e.protocol]))
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break;
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for (type = 0; type < TOMOYO_MAX_NETWORK_OPERATION; type++)
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if (tomoyo_permstr(operation, tomoyo_socket_keyword[type]))
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e.perm |= 1 << type;
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if (e.protocol == TOMOYO_SOCK_MAX || !e.perm)
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return -EINVAL;
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if (param->data[0] == '@') {
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param->data++;
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e.address.group =
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tomoyo_get_group(param, TOMOYO_ADDRESS_GROUP);
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if (!e.address.group)
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return -ENOMEM;
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} else {
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if (!tomoyo_parse_ipaddr_union(param, &e.address))
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goto out;
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}
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if (!tomoyo_parse_number_union(param, &e.port) ||
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e.port.values[1] > 65535)
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goto out;
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error = tomoyo_update_domain(&e.head, sizeof(e), param,
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tomoyo_same_inet_acl,
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tomoyo_merge_inet_acl);
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out:
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tomoyo_put_group(e.address.group);
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tomoyo_put_number_union(&e.port);
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return error;
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}
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/**
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* tomoyo_write_unix_network - Write "struct tomoyo_unix_acl" list.
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*
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* @param: Pointer to "struct tomoyo_acl_param".
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*
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* Returns 0 on success, negative value otherwise.
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*/
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int tomoyo_write_unix_network(struct tomoyo_acl_param *param)
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{
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struct tomoyo_unix_acl e = { .head.type = TOMOYO_TYPE_UNIX_ACL };
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int error;
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u8 type;
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const char *protocol = tomoyo_read_token(param);
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const char *operation = tomoyo_read_token(param);
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for (e.protocol = 0; e.protocol < TOMOYO_SOCK_MAX; e.protocol++)
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if (!strcmp(protocol, tomoyo_proto_keyword[e.protocol]))
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break;
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for (type = 0; type < TOMOYO_MAX_NETWORK_OPERATION; type++)
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if (tomoyo_permstr(operation, tomoyo_socket_keyword[type]))
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e.perm |= 1 << type;
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if (e.protocol == TOMOYO_SOCK_MAX || !e.perm)
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return -EINVAL;
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if (!tomoyo_parse_name_union(param, &e.name))
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return -EINVAL;
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error = tomoyo_update_domain(&e.head, sizeof(e), param,
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tomoyo_same_unix_acl,
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tomoyo_merge_unix_acl);
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tomoyo_put_name_union(&e.name);
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return error;
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}
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/**
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* tomoyo_audit_net_log - Audit network log.
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*
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* @r: Pointer to "struct tomoyo_request_info".
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* @family: Name of socket family ("inet" or "unix").
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* @protocol: Name of protocol in @family.
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* @operation: Name of socket operation.
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* @address: Name of address.
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*
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* Returns 0 on success, negative value otherwise.
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*/
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static int tomoyo_audit_net_log(struct tomoyo_request_info *r,
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const char *family, const u8 protocol,
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const u8 operation, const char *address)
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{
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return tomoyo_supervisor(r, "network %s %s %s %s\n", family,
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tomoyo_proto_keyword[protocol],
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tomoyo_socket_keyword[operation], address);
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}
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/**
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* tomoyo_audit_inet_log - Audit INET network log.
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*
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* @r: Pointer to "struct tomoyo_request_info".
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*
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* Returns 0 on success, negative value otherwise.
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*/
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static int tomoyo_audit_inet_log(struct tomoyo_request_info *r)
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{
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char buf[128];
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int len;
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const __be32 *address = r->param.inet_network.address;
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if (r->param.inet_network.is_ipv6)
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tomoyo_print_ipv6(buf, sizeof(buf), (const struct in6_addr *)
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address, (const struct in6_addr *) address);
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else
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tomoyo_print_ipv4(buf, sizeof(buf), address, address);
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len = strlen(buf);
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snprintf(buf + len, sizeof(buf) - len, " %u",
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r->param.inet_network.port);
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return tomoyo_audit_net_log(r, "inet", r->param.inet_network.protocol,
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r->param.inet_network.operation, buf);
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}
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/**
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* tomoyo_audit_unix_log - Audit UNIX network log.
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*
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* @r: Pointer to "struct tomoyo_request_info".
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*
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* Returns 0 on success, negative value otherwise.
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*/
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static int tomoyo_audit_unix_log(struct tomoyo_request_info *r)
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{
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return tomoyo_audit_net_log(r, "unix", r->param.unix_network.protocol,
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r->param.unix_network.operation,
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r->param.unix_network.address->name);
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}
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/**
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* tomoyo_check_inet_acl - Check permission for inet domain socket operation.
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*
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* @r: Pointer to "struct tomoyo_request_info".
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* @ptr: Pointer to "struct tomoyo_acl_info".
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*
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* Returns true if granted, false otherwise.
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*/
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static bool tomoyo_check_inet_acl(struct tomoyo_request_info *r,
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const struct tomoyo_acl_info *ptr)
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{
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const struct tomoyo_inet_acl *acl =
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container_of(ptr, typeof(*acl), head);
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const u8 size = r->param.inet_network.is_ipv6 ? 16 : 4;
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if (!(acl->perm & (1 << r->param.inet_network.operation)) ||
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!tomoyo_compare_number_union(r->param.inet_network.port,
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&acl->port))
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return false;
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if (acl->address.group)
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return tomoyo_address_matches_group
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(r->param.inet_network.is_ipv6,
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r->param.inet_network.address, acl->address.group);
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return acl->address.is_ipv6 == r->param.inet_network.is_ipv6 &&
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memcmp(&acl->address.ip[0],
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r->param.inet_network.address, size) <= 0 &&
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memcmp(r->param.inet_network.address,
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&acl->address.ip[1], size) <= 0;
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}
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/**
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* tomoyo_check_unix_acl - Check permission for unix domain socket operation.
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*
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* @r: Pointer to "struct tomoyo_request_info".
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* @ptr: Pointer to "struct tomoyo_acl_info".
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*
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* Returns true if granted, false otherwise.
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*/
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static bool tomoyo_check_unix_acl(struct tomoyo_request_info *r,
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const struct tomoyo_acl_info *ptr)
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{
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const struct tomoyo_unix_acl *acl =
|
|
container_of(ptr, typeof(*acl), head);
|
|
|
|
return (acl->perm & (1 << r->param.unix_network.operation)) &&
|
|
tomoyo_compare_name_union(r->param.unix_network.address,
|
|
&acl->name);
|
|
}
|
|
|
|
/**
|
|
* tomoyo_inet_entry - Check permission for INET network operation.
|
|
*
|
|
* @address: Pointer to "struct tomoyo_addr_info".
|
|
*
|
|
* Returns 0 on success, negative value otherwise.
|
|
*/
|
|
static int tomoyo_inet_entry(const struct tomoyo_addr_info *address)
|
|
{
|
|
const int idx = tomoyo_read_lock();
|
|
struct tomoyo_request_info r;
|
|
int error = 0;
|
|
const u8 type = tomoyo_inet2mac[address->protocol][address->operation];
|
|
|
|
if (type && tomoyo_init_request_info(&r, NULL, type)
|
|
!= TOMOYO_CONFIG_DISABLED) {
|
|
r.param_type = TOMOYO_TYPE_INET_ACL;
|
|
r.param.inet_network.protocol = address->protocol;
|
|
r.param.inet_network.operation = address->operation;
|
|
r.param.inet_network.is_ipv6 = address->inet.is_ipv6;
|
|
r.param.inet_network.address = address->inet.address;
|
|
r.param.inet_network.port = ntohs(address->inet.port);
|
|
do {
|
|
tomoyo_check_acl(&r, tomoyo_check_inet_acl);
|
|
error = tomoyo_audit_inet_log(&r);
|
|
} while (error == TOMOYO_RETRY_REQUEST);
|
|
}
|
|
tomoyo_read_unlock(idx);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* tomoyo_check_inet_address - Check permission for inet domain socket's operation.
|
|
*
|
|
* @addr: Pointer to "struct sockaddr".
|
|
* @addr_len: Size of @addr.
|
|
* @port: Port number.
|
|
* @address: Pointer to "struct tomoyo_addr_info".
|
|
*
|
|
* Returns 0 on success, negative value otherwise.
|
|
*/
|
|
static int tomoyo_check_inet_address(const struct sockaddr *addr,
|
|
const unsigned int addr_len,
|
|
const u16 port,
|
|
struct tomoyo_addr_info *address)
|
|
{
|
|
struct tomoyo_inet_addr_info *i = &address->inet;
|
|
|
|
switch (addr->sa_family) {
|
|
case AF_INET6:
|
|
if (addr_len < SIN6_LEN_RFC2133)
|
|
goto skip;
|
|
i->is_ipv6 = true;
|
|
i->address = (__be32 *)
|
|
((struct sockaddr_in6 *) addr)->sin6_addr.s6_addr;
|
|
i->port = ((struct sockaddr_in6 *) addr)->sin6_port;
|
|
break;
|
|
case AF_INET:
|
|
if (addr_len < sizeof(struct sockaddr_in))
|
|
goto skip;
|
|
i->is_ipv6 = false;
|
|
i->address = (__be32 *)
|
|
&((struct sockaddr_in *) addr)->sin_addr;
|
|
i->port = ((struct sockaddr_in *) addr)->sin_port;
|
|
break;
|
|
default:
|
|
goto skip;
|
|
}
|
|
if (address->protocol == SOCK_RAW)
|
|
i->port = htons(port);
|
|
return tomoyo_inet_entry(address);
|
|
skip:
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* tomoyo_unix_entry - Check permission for UNIX network operation.
|
|
*
|
|
* @address: Pointer to "struct tomoyo_addr_info".
|
|
*
|
|
* Returns 0 on success, negative value otherwise.
|
|
*/
|
|
static int tomoyo_unix_entry(const struct tomoyo_addr_info *address)
|
|
{
|
|
const int idx = tomoyo_read_lock();
|
|
struct tomoyo_request_info r;
|
|
int error = 0;
|
|
const u8 type = tomoyo_unix2mac[address->protocol][address->operation];
|
|
|
|
if (type && tomoyo_init_request_info(&r, NULL, type)
|
|
!= TOMOYO_CONFIG_DISABLED) {
|
|
char *buf = address->unix0.addr;
|
|
int len = address->unix0.addr_len - sizeof(sa_family_t);
|
|
|
|
if (len <= 0) {
|
|
buf = "anonymous";
|
|
len = 9;
|
|
} else if (buf[0]) {
|
|
len = strnlen(buf, len);
|
|
}
|
|
buf = tomoyo_encode2(buf, len);
|
|
if (buf) {
|
|
struct tomoyo_path_info addr;
|
|
|
|
addr.name = buf;
|
|
tomoyo_fill_path_info(&addr);
|
|
r.param_type = TOMOYO_TYPE_UNIX_ACL;
|
|
r.param.unix_network.protocol = address->protocol;
|
|
r.param.unix_network.operation = address->operation;
|
|
r.param.unix_network.address = &addr;
|
|
do {
|
|
tomoyo_check_acl(&r, tomoyo_check_unix_acl);
|
|
error = tomoyo_audit_unix_log(&r);
|
|
} while (error == TOMOYO_RETRY_REQUEST);
|
|
kfree(buf);
|
|
} else
|
|
error = -ENOMEM;
|
|
}
|
|
tomoyo_read_unlock(idx);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* tomoyo_check_unix_address - Check permission for unix domain socket's operation.
|
|
*
|
|
* @addr: Pointer to "struct sockaddr".
|
|
* @addr_len: Size of @addr.
|
|
* @address: Pointer to "struct tomoyo_addr_info".
|
|
*
|
|
* Returns 0 on success, negative value otherwise.
|
|
*/
|
|
static int tomoyo_check_unix_address(struct sockaddr *addr,
|
|
const unsigned int addr_len,
|
|
struct tomoyo_addr_info *address)
|
|
{
|
|
struct tomoyo_unix_addr_info *u = &address->unix0;
|
|
|
|
if (addr->sa_family != AF_UNIX)
|
|
return 0;
|
|
u->addr = ((struct sockaddr_un *) addr)->sun_path;
|
|
u->addr_len = addr_len;
|
|
return tomoyo_unix_entry(address);
|
|
}
|
|
|
|
/**
|
|
* tomoyo_kernel_service - Check whether I'm kernel service or not.
|
|
*
|
|
* Returns true if I'm kernel service, false otherwise.
|
|
*/
|
|
static bool tomoyo_kernel_service(void)
|
|
{
|
|
/* Nothing to do if I am a kernel service. */
|
|
return segment_eq(get_fs(), KERNEL_DS);
|
|
}
|
|
|
|
/**
|
|
* tomoyo_sock_family - Get socket's family.
|
|
*
|
|
* @sk: Pointer to "struct sock".
|
|
*
|
|
* Returns one of PF_INET, PF_INET6, PF_UNIX or 0.
|
|
*/
|
|
static u8 tomoyo_sock_family(struct sock *sk)
|
|
{
|
|
u8 family;
|
|
|
|
if (tomoyo_kernel_service())
|
|
return 0;
|
|
family = sk->sk_family;
|
|
switch (family) {
|
|
case PF_INET:
|
|
case PF_INET6:
|
|
case PF_UNIX:
|
|
return family;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* tomoyo_socket_listen_permission - Check permission for listening a socket.
|
|
*
|
|
* @sock: Pointer to "struct socket".
|
|
*
|
|
* Returns 0 on success, negative value otherwise.
|
|
*/
|
|
int tomoyo_socket_listen_permission(struct socket *sock)
|
|
{
|
|
struct tomoyo_addr_info address;
|
|
const u8 family = tomoyo_sock_family(sock->sk);
|
|
const unsigned int type = sock->type;
|
|
struct sockaddr_storage addr;
|
|
int addr_len;
|
|
|
|
if (!family || (type != SOCK_STREAM && type != SOCK_SEQPACKET))
|
|
return 0;
|
|
{
|
|
const int error = sock->ops->getname(sock, (struct sockaddr *)
|
|
&addr, &addr_len, 0);
|
|
|
|
if (error)
|
|
return error;
|
|
}
|
|
address.protocol = type;
|
|
address.operation = TOMOYO_NETWORK_LISTEN;
|
|
if (family == PF_UNIX)
|
|
return tomoyo_check_unix_address((struct sockaddr *) &addr,
|
|
addr_len, &address);
|
|
return tomoyo_check_inet_address((struct sockaddr *) &addr, addr_len,
|
|
0, &address);
|
|
}
|
|
|
|
/**
|
|
* tomoyo_socket_connect_permission - Check permission for setting the remote address of a socket.
|
|
*
|
|
* @sock: Pointer to "struct socket".
|
|
* @addr: Pointer to "struct sockaddr".
|
|
* @addr_len: Size of @addr.
|
|
*
|
|
* Returns 0 on success, negative value otherwise.
|
|
*/
|
|
int tomoyo_socket_connect_permission(struct socket *sock,
|
|
struct sockaddr *addr, int addr_len)
|
|
{
|
|
struct tomoyo_addr_info address;
|
|
const u8 family = tomoyo_sock_family(sock->sk);
|
|
const unsigned int type = sock->type;
|
|
|
|
if (!family)
|
|
return 0;
|
|
address.protocol = type;
|
|
switch (type) {
|
|
case SOCK_DGRAM:
|
|
case SOCK_RAW:
|
|
address.operation = TOMOYO_NETWORK_SEND;
|
|
break;
|
|
case SOCK_STREAM:
|
|
case SOCK_SEQPACKET:
|
|
address.operation = TOMOYO_NETWORK_CONNECT;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
if (family == PF_UNIX)
|
|
return tomoyo_check_unix_address(addr, addr_len, &address);
|
|
return tomoyo_check_inet_address(addr, addr_len, sock->sk->sk_protocol,
|
|
&address);
|
|
}
|
|
|
|
/**
|
|
* tomoyo_socket_bind_permission - Check permission for setting the local address of a socket.
|
|
*
|
|
* @sock: Pointer to "struct socket".
|
|
* @addr: Pointer to "struct sockaddr".
|
|
* @addr_len: Size of @addr.
|
|
*
|
|
* Returns 0 on success, negative value otherwise.
|
|
*/
|
|
int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
|
|
int addr_len)
|
|
{
|
|
struct tomoyo_addr_info address;
|
|
const u8 family = tomoyo_sock_family(sock->sk);
|
|
const unsigned int type = sock->type;
|
|
|
|
if (!family)
|
|
return 0;
|
|
switch (type) {
|
|
case SOCK_STREAM:
|
|
case SOCK_DGRAM:
|
|
case SOCK_RAW:
|
|
case SOCK_SEQPACKET:
|
|
address.protocol = type;
|
|
address.operation = TOMOYO_NETWORK_BIND;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
if (family == PF_UNIX)
|
|
return tomoyo_check_unix_address(addr, addr_len, &address);
|
|
return tomoyo_check_inet_address(addr, addr_len, sock->sk->sk_protocol,
|
|
&address);
|
|
}
|
|
|
|
/**
|
|
* tomoyo_socket_sendmsg_permission - Check permission for sending a datagram.
|
|
*
|
|
* @sock: Pointer to "struct socket".
|
|
* @msg: Pointer to "struct msghdr".
|
|
* @size: Unused.
|
|
*
|
|
* Returns 0 on success, negative value otherwise.
|
|
*/
|
|
int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
|
|
int size)
|
|
{
|
|
struct tomoyo_addr_info address;
|
|
const u8 family = tomoyo_sock_family(sock->sk);
|
|
const unsigned int type = sock->type;
|
|
|
|
if (!msg->msg_name || !family ||
|
|
(type != SOCK_DGRAM && type != SOCK_RAW))
|
|
return 0;
|
|
address.protocol = type;
|
|
address.operation = TOMOYO_NETWORK_SEND;
|
|
if (family == PF_UNIX)
|
|
return tomoyo_check_unix_address((struct sockaddr *)
|
|
msg->msg_name,
|
|
msg->msg_namelen, &address);
|
|
return tomoyo_check_inet_address((struct sockaddr *) msg->msg_name,
|
|
msg->msg_namelen,
|
|
sock->sk->sk_protocol, &address);
|
|
}
|