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Message-Id: <20210407001604.85071-3-mathew.j.martineau@linux.intel.com>
Date: Tue, 6 Apr 2021 17:15:58 -0700
From: Mat Martineau <mathew.j.martineau@...ux.intel.com>
To: netdev@...r.kernel.org
Cc: Geliang Tang <geliangtang@...il.com>, davem@...emloft.net,
kuba@...nel.org, matthieu.baerts@...sares.net,
mptcp@...ts.linux.dev,
Mat Martineau <mathew.j.martineau@...ux.intel.com>
Subject: [PATCH net-next 2/8] mptcp: use mptcp_addr_info in mptcp_out_options
From: Geliang Tang <geliangtang@...il.com>
This patch moved the mptcp_addr_info struct from protocol.h to mptcp.h,
added a new struct mptcp_addr_info member addr in struct mptcp_out_options,
and dropped the original addr, addr6, addr_id and port fields in it. Then
we can use opts->addr to get the adding address from PM directly using
mptcp_pm_add_addr_signal.
Since the port number became big-endian now, use ntohs to convert it
before sending it out with the ADD_ADDR suboption. Also convert it
when passing it to add_addr_generate_hmac or printing it out.
Co-developed-by: Matthieu Baerts <matthieu.baerts@...sares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@...sares.net>
Signed-off-by: Geliang Tang <geliangtang@...il.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@...ux.intel.com>
---
include/net/mptcp.h | 21 +++++++++++++--------
net/mptcp/options.c | 44 ++++++++++++++++++++------------------------
net/mptcp/protocol.h | 12 ------------
3 files changed, 33 insertions(+), 44 deletions(-)
diff --git a/include/net/mptcp.h b/include/net/mptcp.h
index 16fe34d139c3..83f23774b908 100644
--- a/include/net/mptcp.h
+++ b/include/net/mptcp.h
@@ -41,20 +41,25 @@ struct mptcp_rm_list {
u8 nr;
};
+struct mptcp_addr_info {
+ u8 id;
+ sa_family_t family;
+ __be16 port;
+ union {
+ struct in_addr addr;
+#if IS_ENABLED(CONFIG_MPTCP_IPV6)
+ struct in6_addr addr6;
+#endif
+ };
+};
+
struct mptcp_out_options {
#if IS_ENABLED(CONFIG_MPTCP)
u16 suboptions;
u64 sndr_key;
u64 rcvr_key;
- union {
- struct in_addr addr;
-#if IS_ENABLED(CONFIG_MPTCP_IPV6)
- struct in6_addr addr6;
-#endif
- };
- u8 addr_id;
- u16 port;
u64 ahmac;
+ struct mptcp_addr_info addr;
struct mptcp_rm_list rm_list;
u8 join_id;
u8 backup;
diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index 4b7119eb2c31..352c128337a7 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -626,7 +626,6 @@ static bool mptcp_established_options_add_addr(struct sock *sk, struct sk_buff *
struct mptcp_sock *msk = mptcp_sk(subflow->conn);
bool drop_other_suboptions = false;
unsigned int opt_size = *size;
- struct mptcp_addr_info saddr;
bool echo;
bool port;
int len;
@@ -643,45 +642,40 @@ static bool mptcp_established_options_add_addr(struct sock *sk, struct sk_buff *
}
if (!mptcp_pm_should_add_signal(msk) ||
- !(mptcp_pm_add_addr_signal(msk, remaining, &saddr, &echo, &port)))
+ !(mptcp_pm_add_addr_signal(msk, remaining, &opts->addr, &echo, &port)))
return false;
- len = mptcp_add_addr_len(saddr.family, echo, port);
+ len = mptcp_add_addr_len(opts->addr.family, echo, port);
if (remaining < len)
return false;
*size = len;
if (drop_other_suboptions)
*size -= opt_size;
- opts->addr_id = saddr.id;
- if (port)
- opts->port = ntohs(saddr.port);
- if (saddr.family == AF_INET) {
+ if (opts->addr.family == AF_INET) {
opts->suboptions |= OPTION_MPTCP_ADD_ADDR;
- opts->addr = saddr.addr;
if (!echo) {
opts->ahmac = add_addr_generate_hmac(msk->local_key,
msk->remote_key,
- opts->addr_id,
- &opts->addr,
- opts->port);
+ opts->addr.id,
+ &opts->addr.addr,
+ ntohs(opts->addr.port));
}
}
#if IS_ENABLED(CONFIG_MPTCP_IPV6)
- else if (saddr.family == AF_INET6) {
+ else if (opts->addr.family == AF_INET6) {
opts->suboptions |= OPTION_MPTCP_ADD_ADDR6;
- opts->addr6 = saddr.addr6;
if (!echo) {
opts->ahmac = add_addr6_generate_hmac(msk->local_key,
msk->remote_key,
- opts->addr_id,
- &opts->addr6,
- opts->port);
+ opts->addr.id,
+ &opts->addr.addr6,
+ ntohs(opts->addr.port));
}
}
#endif
pr_debug("addr_id=%d, ahmac=%llu, echo=%d, port=%d",
- opts->addr_id, opts->ahmac, echo, opts->port);
+ opts->addr.id, opts->ahmac, echo, ntohs(opts->addr.port));
return true;
}
@@ -1217,7 +1211,7 @@ void mptcp_write_options(__be32 *ptr, const struct tcp_sock *tp,
len = TCPOLEN_MPTCP_ADD_ADDR6_BASE;
#endif
- if (opts->port)
+ if (opts->addr.port)
len += TCPOLEN_MPTCP_PORT_LEN;
if (opts->ahmac) {
@@ -1226,28 +1220,30 @@ void mptcp_write_options(__be32 *ptr, const struct tcp_sock *tp,
}
*ptr++ = mptcp_option(MPTCPOPT_ADD_ADDR,
- len, echo, opts->addr_id);
+ len, echo, opts->addr.id);
if (OPTION_MPTCP_ADD_ADDR & opts->suboptions) {
- memcpy((u8 *)ptr, (u8 *)&opts->addr.s_addr, 4);
+ memcpy((u8 *)ptr, (u8 *)&opts->addr.addr.s_addr, 4);
ptr += 1;
}
#if IS_ENABLED(CONFIG_MPTCP_IPV6)
else if (OPTION_MPTCP_ADD_ADDR6 & opts->suboptions) {
- memcpy((u8 *)ptr, opts->addr6.s6_addr, 16);
+ memcpy((u8 *)ptr, opts->addr.addr6.s6_addr, 16);
ptr += 4;
}
#endif
- if (!opts->port) {
+ if (!opts->addr.port) {
if (opts->ahmac) {
put_unaligned_be64(opts->ahmac, ptr);
ptr += 2;
}
} else {
+ u16 port = ntohs(opts->addr.port);
+
if (opts->ahmac) {
u8 *bptr = (u8 *)ptr;
- put_unaligned_be16(opts->port, bptr);
+ put_unaligned_be16(port, bptr);
bptr += 2;
put_unaligned_be64(opts->ahmac, bptr);
bptr += 8;
@@ -1256,7 +1252,7 @@ void mptcp_write_options(__be32 *ptr, const struct tcp_sock *tp,
ptr += 3;
} else {
- put_unaligned_be32(opts->port << 16 |
+ put_unaligned_be32(port << 16 |
TCPOPT_NOP << 8 |
TCPOPT_NOP, ptr);
ptr += 1;
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index cb5dad522f39..4890dbb9f710 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -169,18 +169,6 @@ static inline __be32 mptcp_option(u8 subopt, u8 len, u8 nib, u8 field)
((nib & 0xF) << 8) | field);
}
-struct mptcp_addr_info {
- sa_family_t family;
- __be16 port;
- u8 id;
- union {
- struct in_addr addr;
-#if IS_ENABLED(CONFIG_MPTCP_IPV6)
- struct in6_addr addr6;
-#endif
- };
-};
-
enum mptcp_pm_status {
MPTCP_PM_ADD_ADDR_RECEIVED,
MPTCP_PM_ADD_ADDR_SEND_ACK,
--
2.31.1
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