From 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 22 Oct 2024 10:36:11 +0000
Subject: [PATCH] 修改4g拨号为QMI,需要在系统里后台执行quectel-CM
---
kernel/net/sctp/ulpevent.c | 96 ++++++++++++++++++++++++++++++++++--------------
1 files changed, 68 insertions(+), 28 deletions(-)
diff --git a/kernel/net/sctp/ulpevent.c b/kernel/net/sctp/ulpevent.c
index 8cb7d98..0c3d2b4 100644
--- a/kernel/net/sctp/ulpevent.c
+++ b/kernel/net/sctp/ulpevent.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/* SCTP kernel implementation
* (C) Copyright IBM Corp. 2001, 2004
* Copyright (c) 1999-2000 Cisco, Inc.
@@ -8,22 +9,6 @@
*
* These functions manipulate an sctp event. The struct ulpevent is used
* to carry notifications and data to the ULP (sockets).
- *
- * This SCTP implementation is free software;
- * you can redistribute it and/or modify it under the terms of
- * the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This SCTP implementation is distributed in the hope that it
- * will be useful, but WITHOUT ANY WARRANTY; without even the implied
- * ************************
- * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- * See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GNU CC; see the file COPYING. If not, see
- * <http://www.gnu.org/licenses/>.
*
* Please send any bug reports or fixes you make to the
* email address(es):
@@ -253,7 +238,7 @@
* When a destination address on a multi-homed peer encounters a change
* an interface details event is sent.
*/
-struct sctp_ulpevent *sctp_ulpevent_make_peer_addr_change(
+static struct sctp_ulpevent *sctp_ulpevent_make_peer_addr_change(
const struct sctp_association *asoc,
const struct sockaddr_storage *aaddr,
int flags, int state, int error, gfp_t gfp)
@@ -349,6 +334,25 @@
fail:
return NULL;
+}
+
+void sctp_ulpevent_notify_peer_addr_change(struct sctp_transport *transport,
+ int state, int error)
+{
+ struct sctp_association *asoc = transport->asoc;
+ struct sockaddr_storage addr;
+ struct sctp_ulpevent *event;
+
+ if (asoc->state < SCTP_STATE_ESTABLISHED)
+ return;
+
+ memset(&addr, 0, sizeof(struct sockaddr_storage));
+ memcpy(&addr, &transport->ipaddr, transport->af_specific->sockaddr_len);
+
+ event = sctp_ulpevent_make_peer_addr_change(asoc, &addr, 0, state,
+ error, GFP_ATOMIC);
+ if (event)
+ asoc->stream.si->enqueue_event(&asoc->ulpq, event);
}
/* Create and initialize an SCTP_REMOTE_ERROR notification.
@@ -526,6 +530,45 @@
return NULL;
}
+struct sctp_ulpevent *sctp_ulpevent_make_send_failed_event(
+ const struct sctp_association *asoc, struct sctp_chunk *chunk,
+ __u16 flags, __u32 error, gfp_t gfp)
+{
+ struct sctp_send_failed_event *ssf;
+ struct sctp_ulpevent *event;
+ struct sk_buff *skb;
+ int len;
+
+ skb = skb_copy_expand(chunk->skb, sizeof(*ssf), 0, gfp);
+ if (!skb)
+ return NULL;
+
+ len = ntohs(chunk->chunk_hdr->length);
+ len -= sctp_datachk_len(&asoc->stream);
+
+ skb_pull(skb, sctp_datachk_len(&asoc->stream));
+ event = sctp_skb2event(skb);
+ sctp_ulpevent_init(event, MSG_NOTIFICATION, skb->truesize);
+
+ ssf = skb_push(skb, sizeof(*ssf));
+ ssf->ssf_type = SCTP_SEND_FAILED_EVENT;
+ ssf->ssf_flags = flags;
+ ssf->ssf_length = sizeof(*ssf) + len;
+ skb_trim(skb, ssf->ssf_length);
+ ssf->ssf_error = error;
+
+ ssf->ssfe_info.snd_sid = chunk->sinfo.sinfo_stream;
+ ssf->ssfe_info.snd_ppid = chunk->sinfo.sinfo_ppid;
+ ssf->ssfe_info.snd_context = chunk->sinfo.sinfo_context;
+ ssf->ssfe_info.snd_assoc_id = chunk->sinfo.sinfo_assoc_id;
+ ssf->ssfe_info.snd_flags = chunk->chunk_hdr->flags;
+
+ sctp_ulpevent_set_owner(event, asoc);
+ ssf->ssf_assoc_id = sctp_assoc2id(asoc);
+
+ return event;
+}
+
/* Create and initialize a SCTP_SHUTDOWN_EVENT notification.
*
* Socket Extensions for SCTP - draft-01
@@ -634,8 +677,9 @@
gfp_t gfp)
{
struct sctp_ulpevent *event = NULL;
- struct sk_buff *skb;
- size_t padding, len;
+ struct sk_buff *skb = chunk->skb;
+ struct sock *sk = asoc->base.sk;
+ size_t padding, datalen;
int rx_count;
/*
@@ -646,15 +690,12 @@
if (asoc->ep->rcvbuf_policy)
rx_count = atomic_read(&asoc->rmem_alloc);
else
- rx_count = atomic_read(&asoc->base.sk->sk_rmem_alloc);
+ rx_count = atomic_read(&sk->sk_rmem_alloc);
- if (rx_count >= asoc->base.sk->sk_rcvbuf) {
+ datalen = ntohs(chunk->chunk_hdr->length);
- if ((asoc->base.sk->sk_userlocks & SOCK_RCVBUF_LOCK) ||
- (!sk_rmem_schedule(asoc->base.sk, chunk->skb,
- chunk->skb->truesize)))
- goto fail;
- }
+ if (rx_count >= sk->sk_rcvbuf || !sk_rmem_schedule(sk, skb, datalen))
+ goto fail;
/* Clone the original skb, sharing the data. */
skb = skb_clone(chunk->skb, gfp);
@@ -681,8 +722,7 @@
* The sender should never pad with more than 3 bytes. The receiver
* MUST ignore the padding bytes.
*/
- len = ntohs(chunk->chunk_hdr->length);
- padding = SCTP_PAD4(len) - len;
+ padding = SCTP_PAD4(datalen) - datalen;
/* Fixup cloned skb with just this chunks data. */
skb_trim(skb, chunk->chunk_end - padding - skb->data);
--
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