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| author | Pauli Virtanen <pav@iki.fi> | 2025-07-14 19:40:37 +0300 |
|---|---|---|
| committer | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2025-07-23 10:31:19 -0400 |
| commit | 7565bc56598c3d135318f1bd76a0178dd3ea918f (patch) | |
| tree | c8f443423c3bdb0c089de25286cbdf3ad4b00215 /net/bluetooth | |
| parent | 15843c7fdba65568704245fd3ea2aa3aa2d50825 (diff) | |
| download | linux-7565bc56598c3d135318f1bd76a0178dd3ea918f.tar.gz linux-7565bc56598c3d135318f1bd76a0178dd3ea918f.tar.bz2 linux-7565bc56598c3d135318f1bd76a0178dd3ea918f.zip | |
Bluetooth: ISO: add socket option to report packet seqnum via CMSG
User applications need a way to track which ISO interval a given SDU
belongs to, to properly detect packet loss. All controllers do not set
timestamps, and it's not guaranteed user application receives all packet
reports (small socket buffer, or controller doesn't send all reports
like Intel AX210 is doing).
Add socket option BT_PKT_SEQNUM that enables reporting of received
packet ISO sequence number in BT_SCM_PKT_SEQNUM CMSG.
Use BT_PKT_SEQNUM == 22 for the socket option, as 21 was used earlier
for a removed experimental feature that never got into mainline.
Signed-off-by: Pauli Virtanen <pav@iki.fi>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Diffstat (limited to 'net/bluetooth')
| -rw-r--r-- | net/bluetooth/af_bluetooth.c | 7 | ||||
| -rw-r--r-- | net/bluetooth/iso.c | 21 |
2 files changed, 25 insertions, 3 deletions
diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c index ee9bf84c88a7..2b94e2077203 100644 --- a/net/bluetooth/af_bluetooth.c +++ b/net/bluetooth/af_bluetooth.c @@ -364,6 +364,13 @@ int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, put_cmsg(msg, SOL_BLUETOOTH, BT_SCM_PKT_STATUS, sizeof(pkt_status), &pkt_status); } + + if (test_bit(BT_SK_PKT_SEQNUM, &bt_sk(sk)->flags)) { + u16 pkt_seqnum = hci_skb_pkt_seqnum(skb); + + put_cmsg(msg, SOL_BLUETOOTH, BT_SCM_PKT_SEQNUM, + sizeof(pkt_seqnum), &pkt_seqnum); + } } skb_free_datagram(sk, skb); diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c index 5e752950e266..2f229f2077e8 100644 --- a/net/bluetooth/iso.c +++ b/net/bluetooth/iso.c @@ -1687,6 +1687,17 @@ static int iso_sock_setsockopt(struct socket *sock, int level, int optname, clear_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags); break; + case BT_PKT_SEQNUM: + err = copy_safe_from_sockptr(&opt, sizeof(opt), optval, optlen); + if (err) + break; + + if (opt) + set_bit(BT_SK_PKT_SEQNUM, &bt_sk(sk)->flags); + else + clear_bit(BT_SK_PKT_SEQNUM, &bt_sk(sk)->flags); + break; + case BT_ISO_QOS: if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECT2 && @@ -2278,7 +2289,7 @@ static void iso_disconn_cfm(struct hci_conn *hcon, __u8 reason) void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) { struct iso_conn *conn = hcon->iso_data; - __u16 pb, ts, len; + __u16 pb, ts, len, sn; if (!conn) goto drop; @@ -2308,6 +2319,7 @@ void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) goto drop; } + sn = __le16_to_cpu(hdr->sn); len = __le16_to_cpu(hdr->slen); } else { struct hci_iso_data_hdr *hdr; @@ -2318,18 +2330,20 @@ void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) goto drop; } + sn = __le16_to_cpu(hdr->sn); len = __le16_to_cpu(hdr->slen); } flags = hci_iso_data_flags(len); len = hci_iso_data_len(len); - BT_DBG("Start: total len %d, frag len %d flags 0x%4.4x", len, - skb->len, flags); + BT_DBG("Start: total len %d, frag len %d flags 0x%4.4x sn %d", + len, skb->len, flags, sn); if (len == skb->len) { /* Complete frame received */ hci_skb_pkt_status(skb) = flags & 0x03; + hci_skb_pkt_seqnum(skb) = sn; iso_recv_frame(conn, skb); return; } @@ -2352,6 +2366,7 @@ void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) goto drop; hci_skb_pkt_status(conn->rx_skb) = flags & 0x03; + hci_skb_pkt_seqnum(conn->rx_skb) = sn; skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), skb->len); conn->rx_len = len - skb->len; |