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// SPDX-License-Identifier: GPL-2.0
#include <linux/ceph/ceph_debug.h>
#include <linux/inet.h>
#include <linux/ceph/decode.h>
static int
ceph_decode_entity_addr_versioned(void **p, void *end,
struct ceph_entity_addr *addr)
{
int ret;
u8 struct_v;
u32 struct_len, addr_len;
void *struct_end;
ret = ceph_start_decoding(p, end, 1, "entity_addr_t", &struct_v,
&struct_len);
if (ret)
goto bad;
ret = -EINVAL;
struct_end = *p + struct_len;
ceph_decode_copy_safe(p, end, &addr->type, sizeof(addr->type), bad);
ceph_decode_copy_safe(p, end, &addr->nonce, sizeof(addr->nonce), bad);
ceph_decode_32_safe(p, end, addr_len, bad);
if (addr_len > sizeof(addr->in_addr))
goto bad;
memset(&addr->in_addr, 0, sizeof(addr->in_addr));
if (addr_len) {
ceph_decode_copy_safe(p, end, &addr->in_addr, addr_len, bad);
addr->in_addr.ss_family =
le16_to_cpu((__force __le16)addr->in_addr.ss_family);
}
/* Advance past anything the client doesn't yet understand */
*p = struct_end;
ret = 0;
bad:
return ret;
}
static int
ceph_decode_entity_addr_legacy(void **p, void *end,
struct ceph_entity_addr *addr)
{
int ret = -EINVAL;
/* Skip rest of type field */
ceph_decode_skip_n(p, end, 3, bad);
/*
* Clients that don't support ADDR2 always send TYPE_NONE, change it
* to TYPE_LEGACY for forward compatibility.
*/
addr->type = CEPH_ENTITY_ADDR_TYPE_LEGACY;
ceph_decode_copy_safe(p, end, &addr->nonce, sizeof(addr->nonce), bad);
memset(&addr->in_addr, 0, sizeof(addr->in_addr));
ceph_decode_copy_safe(p, end, &addr->in_addr,
sizeof(addr->in_addr), bad);
addr->in_addr.ss_family =
be16_to_cpu((__force __be16)addr->in_addr.ss_family);
ret = 0;
bad:
return ret;
}
int
ceph_decode_entity_addr(void **p, void *end, struct ceph_entity_addr *addr)
{
u8 marker;
ceph_decode_8_safe(p, end, marker, bad);
if (marker == 1)
return ceph_decode_entity_addr_versioned(p, end, addr);
else if (marker == 0)
return ceph_decode_entity_addr_legacy(p, end, addr);
bad:
return -EINVAL;
}
EXPORT_SYMBOL(ceph_decode_entity_addr);
/*
* Return addr of desired type (MSGR2 or LEGACY) or error.
* Make sure there is only one match.
*
* Assume encoding with MSG_ADDR2.
*/
int ceph_decode_entity_addrvec(void **p, void *end, bool msgr2,
struct ceph_entity_addr *addr)
{
__le32 my_type = msgr2 ? CEPH_ENTITY_ADDR_TYPE_MSGR2 :
CEPH_ENTITY_ADDR_TYPE_LEGACY;
struct ceph_entity_addr tmp_addr;
int addr_cnt;
bool found;
u8 marker;
int ret;
int i;
ceph_decode_8_safe(p, end, marker, e_inval);
if (marker != 2) {
pr_err("bad addrvec marker %d\n", marker);
return -EINVAL;
}
ceph_decode_32_safe(p, end, addr_cnt, e_inval);
found = false;
for (i = 0; i < addr_cnt; i++) {
ret = ceph_decode_entity_addr(p, end, &tmp_addr);
if (ret)
return ret;
if (tmp_addr.type == my_type) {
if (found) {
pr_err("another match of type %d in addrvec\n",
le32_to_cpu(my_type));
return -EINVAL;
}
memcpy(addr, &tmp_addr, sizeof(*addr));
found = true;
}
}
if (!found && addr_cnt != 0) {
pr_err("no match of type %d in addrvec\n",
le32_to_cpu(my_type));
return -ENOENT;
}
return 0;
e_inval:
return -EINVAL;
}
EXPORT_SYMBOL(ceph_decode_entity_addrvec);
static int get_sockaddr_encoding_len(sa_family_t family)
{
union {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
} u;
switch (family) {
case AF_INET:
return sizeof(u.sin);
case AF_INET6:
return sizeof(u.sin6);
default:
return sizeof(u);
}
}
int ceph_entity_addr_encoding_len(const struct ceph_entity_addr *addr)
{
sa_family_t family = get_unaligned(&addr->in_addr.ss_family);
int addr_len = get_sockaddr_encoding_len(family);
return 1 + CEPH_ENCODING_START_BLK_LEN + 4 + 4 + 4 + addr_len;
}
void ceph_encode_entity_addr(void **p, const struct ceph_entity_addr *addr)
{
sa_family_t family = get_unaligned(&addr->in_addr.ss_family);
int addr_len = get_sockaddr_encoding_len(family);
ceph_encode_8(p, 1); /* marker */
ceph_start_encoding(p, 1, 1, sizeof(addr->type) +
sizeof(addr->nonce) +
sizeof(u32) + addr_len);
ceph_encode_copy(p, &addr->type, sizeof(addr->type));
ceph_encode_copy(p, &addr->nonce, sizeof(addr->nonce));
ceph_encode_32(p, addr_len);
ceph_encode_16(p, family);
ceph_encode_copy(p, addr->in_addr.__data, addr_len - sizeof(family));
}
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