Process a packet with mss option set or use default
value.
Signed-off-by: Glenn Grundstrom <[EMAIL PROTECTED]>
---
diff --git a/drivers/infiniband/hw/nes/nes_cm.c
b/drivers/infiniband/hw/nes/nes_cm.c
index 79889a4..1777769 100644
--- a/drivers/infiniband/hw/nes/nes_cm.c
+++ b/drivers/infiniband/hw/nes/nes_cm.c
@@ -1220,11 +1220,12 @@ static int rem_ref_cm_node(struct nes_cm_core *cm_core,
/**
* process_options
*/
-static void process_options(struct nes_cm_node *cm_node, u8 *optionsloc, u32
optionsize)
+static int process_options(struct nes_cm_node *cm_node, u8 *optionsloc, u32
optionsize, u32 syn_packet)
{
u32 tmp;
u32 offset = 0;
union all_known_options *all_options;
+ char got_mss_option = 0;
while (offset < optionsize) {
all_options = (union all_known_options *)(optionsloc + offset);
@@ -1236,9 +1237,17 @@ static void process_options(struct nes_cm_node *cm_node,
u8 *optionsloc, u32 opt
offset += 1;
continue;
case OPTION_NUMBER_MSS:
- tmp = htons(all_options->as_mss.mss);
- if (tmp < cm_node->tcp_cntxt.mss)
- cm_node->tcp_cntxt.mss = tmp;
+ nes_debug(NES_DBG_CM, "%s: MSS Length: %d
Offset: %d Size: %d\n",
+ __FUNCTION__,
+ all_options->as_mss.length,
offset, optionsize);
+ got_mss_option = 1;
+ if (all_options->as_mss.length != 4) {
+ return 1;
+ } else {
+ tmp = htons(all_options->as_mss.mss);
+ if (tmp > 0 && tmp <
cm_node->tcp_cntxt.mss)
+ cm_node->tcp_cntxt.mss = tmp;
+ }
break;
case OPTION_NUMBER_WINDOW_SCALE:
cm_node->tcp_cntxt.snd_wscale =
all_options->as_windowscale.shiftcount;
@@ -1253,6 +1262,9 @@ static void process_options(struct nes_cm_node *cm_node,
u8 *optionsloc, u32 opt
}
offset += all_options->as_base.length;
}
+ if ((!got_mss_option) && (syn_packet))
+ cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
+ return 0;
}
@@ -1343,6 +1355,8 @@ int process_packet(struct nes_cm_node *cm_node, struct
sk_buff *skb,
u8 *optionsloc = (u8 *)&tcph[1];
process_options(cm_node, optionsloc, optionsize);
}
+ else if (tcph->syn)
+ cm_node->tcp_cntxt.mss = NES_CM_DEFAULT_MSS;
cm_node->tcp_cntxt.snd_wnd = htons(tcph->window) <<
cm_node->tcp_cntxt.snd_wscale;
diff --git a/drivers/infiniband/hw/nes/nes_cm.h
b/drivers/infiniband/hw/nes/nes_cm.h
index cd8e003..c511242 100644
--- a/drivers/infiniband/hw/nes/nes_cm.h
+++ b/drivers/infiniband/hw/nes/nes_cm.h
@@ -152,6 +152,8 @@ struct nes_timer_entry {
#define NES_CM_DEFAULT_FREE_PKTS 0x000A
#define NES_CM_FREE_PKT_LO_WATERMARK 2
+#define NES_CM_DEFAULT_MSS 536
+
#define NES_CM_DEF_SEQ 0x159bf75f
#define NES_CM_DEF_LOCAL_ID 0x3b47
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