diff options
Diffstat (limited to 'net/sctp/inqueue.c')
| -rw-r--r-- | net/sctp/inqueue.c | 81 |
1 files changed, 51 insertions, 30 deletions
diff --git a/net/sctp/inqueue.c b/net/sctp/inqueue.c index c30629e1778..4de12afa13d 100644 --- a/net/sctp/inqueue.c +++ b/net/sctp/inqueue.c @@ -1,9 +1,9 @@ -/* SCTP kernel reference Implementation +/* SCTP kernel implementation * Copyright (c) 1999-2000 Cisco, Inc. * Copyright (c) 1999-2001 Motorola, Inc. * Copyright (c) 2002 International Business Machines, Corp. * - * This file is part of the SCTP kernel reference Implementation + * This file is part of the SCTP kernel implementation * * These functions are the methods for accessing the SCTP inqueue. * @@ -11,41 +11,37 @@ * (which might be bundles or fragments of chunks) and out of which you * pop SCTP whole chunks. * - * The SCTP reference implementation is free software; + * 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. * - * The SCTP reference implementation is distributed in the hope that it + * 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, write to - * the Free Software Foundation, 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. + * 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): - * lksctp developers <lksctp-developers@lists.sourceforge.net> - * - * Or submit a bug report through the following website: - * http://www.sf.net/projects/lksctp + * lksctp developers <linux-sctp@vger.kernel.org> * * Written or modified by: * La Monte H.P. Yarroll <piggy@acm.org> * Karl Knutson <karl@athena.chicago.il.us> - * - * Any bugs reported given to us we will try to fix... any fixes shared will - * be incorporated into the next SCTP release. */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + #include <net/sctp/sctp.h> #include <net/sctp/sm.h> #include <linux/interrupt.h> +#include <linux/slab.h> /* Initialize an SCTP inqueue. */ void sctp_inq_init(struct sctp_inq *queue) @@ -55,8 +51,6 @@ void sctp_inq_init(struct sctp_inq *queue) /* Create a task for delivering data. */ INIT_WORK(&queue->immediate, NULL); - - queue->malloced = 0; } /* Release the memory associated with an SCTP inqueue. */ @@ -77,11 +71,6 @@ void sctp_inq_free(struct sctp_inq *queue) sctp_chunk_free(queue->in_progress); queue->in_progress = NULL; } - - if (queue->malloced) { - /* Dump the master memory segment. */ - kfree(queue); - } } /* Put a new packet in an SCTP inqueue. @@ -90,6 +79,10 @@ void sctp_inq_free(struct sctp_inq *queue) void sctp_inq_push(struct sctp_inq *q, struct sctp_chunk *chunk) { /* Directly call the packet handling routine. */ + if (chunk->rcvr->dead) { + sctp_chunk_free(chunk); + return; + } /* We are now calling this either from the soft interrupt * or from the backlog processing. @@ -97,9 +90,30 @@ void sctp_inq_push(struct sctp_inq *q, struct sctp_chunk *chunk) * on the BH related data structures. */ list_add_tail(&chunk->list, &q->in_chunk_list); + if (chunk->asoc) + chunk->asoc->stats.ipackets++; q->immediate.func(&q->immediate); } +/* Peek at the next chunk on the inqeue. */ +struct sctp_chunkhdr *sctp_inq_peek(struct sctp_inq *queue) +{ + struct sctp_chunk *chunk; + sctp_chunkhdr_t *ch = NULL; + + chunk = queue->in_progress; + /* If there is no more chunks in this packet, say so */ + if (chunk->singleton || + chunk->end_of_packet || + chunk->pdiscard) + return NULL; + + ch = (sctp_chunkhdr_t *)chunk->chunk_end; + + return ch; +} + + /* Extract a chunk from an SCTP inqueue. * * WARNING: If you need to put the chunk on another queue, you need to @@ -130,6 +144,14 @@ struct sctp_chunk *sctp_inq_pop(struct sctp_inq *queue) /* Force chunk->skb->data to chunk->chunk_end. */ skb_pull(chunk->skb, chunk->chunk_end - chunk->skb->data); + + /* Verify that we have at least chunk headers + * worth of buffer left. + */ + if (skb_headlen(chunk->skb) < sizeof(sctp_chunkhdr_t)) { + sctp_chunk_free(chunk); + chunk = queue->in_progress = NULL; + } } } @@ -159,16 +181,16 @@ struct sctp_chunk *sctp_inq_pop(struct sctp_inq *queue) * the skb->tail. */ if (unlikely(skb_is_nonlinear(chunk->skb))) { - if (chunk->chunk_end > chunk->skb->tail) - chunk->chunk_end = chunk->skb->tail; + if (chunk->chunk_end > skb_tail_pointer(chunk->skb)) + chunk->chunk_end = skb_tail_pointer(chunk->skb); } skb_pull(chunk->skb, sizeof(sctp_chunkhdr_t)); chunk->subh.v = NULL; /* Subheader is no longer valid. */ - if (chunk->chunk_end < chunk->skb->tail) { + if (chunk->chunk_end < skb_tail_pointer(chunk->skb)) { /* This is not a singleton */ chunk->singleton = 0; - } else if (chunk->chunk_end > chunk->skb->tail) { + } else if (chunk->chunk_end > skb_tail_pointer(chunk->skb)) { /* RFC 2960, Section 6.10 Bundling * * Partial chunks MUST NOT be placed in an SCTP packet. @@ -190,10 +212,10 @@ struct sctp_chunk *sctp_inq_pop(struct sctp_inq *queue) chunk->end_of_packet = 1; } - SCTP_DEBUG_PRINTK("+++sctp_inq_pop+++ chunk %p[%s]," - " length %d, skb->len %d\n",chunk, - sctp_cname(SCTP_ST_CHUNK(chunk->chunk_hdr->type)), - ntohs(chunk->chunk_hdr->length), chunk->skb->len); + pr_debug("+++sctp_inq_pop+++ chunk:%p[%s], length:%d, skb->len:%d\n", + chunk, sctp_cname(SCTP_ST_CHUNK(chunk->chunk_hdr->type)), + ntohs(chunk->chunk_hdr->length), chunk->skb->len); + return chunk; } @@ -209,4 +231,3 @@ void sctp_inq_set_th_handler(struct sctp_inq *q, work_func_t callback) { INIT_WORK(&q->immediate, callback); } - |