Here are a few patches that correct the memory alignment issues. The first
file also contains a change from "break" to "return" because the variable
"stage_1_cfg" is used after the loop and is really just "rtskb->data" which
is freed using kfree_rtskb() before the break. The change to rtmac_proto.c
was useful to me while tracking down an alignment issue, but if this last
change was "accidentally" lost it wouldn't matter. :-)
Syntactically I prefer dereferencing since it's easier to see what the code
does at a glance (perhaps someone has a preference toward get_unaligned()
and put_unaligned() instead). But consistency with the rest of the code
seems to demand memcpy().
- James
_____________________________
Signed-off-by: James Kilts <jameskilts <at> google's mail service>
---
diff -ru rtnet-0.9.11_original/stack/rtcfg/rtcfg_client_event.c
rtnet-0.9.11/stack/rtcfg/rtcfg_client_event.c
--- rtnet-0.9.11_original/stack/rtcfg/rtcfg_client_event.c 2009-11-12
11:36:56.000000000 +0100
+++ rtnet-0.9.11/stack/rtcfg/rtcfg_client_event.c 2009-12-10
16:07:16.000000000 +0100
@@ -598,24 +622,24 @@
if (rtskb->len < sizeof(struct rtcfg_frm_stage_1_cfg) +
2*RTCFG_ADDRSIZE_IP) {
rtdm_mutex_unlock(&rtcfg_dev->dev_mutex);
RTCFG_DEBUG(1, "RTcfg: received invalid stage_1_cfg "
"frame\n");
kfree_rtskb(rtskb);
- break;
+ return;
}
rtdev = rtskb->rtdev;
- daddr = *(u32*)stage_1_cfg->client_addr;
+ memcpy(&daddr, stage_1_cfg->client_addr, 4);
stage_1_cfg = (struct rtcfg_frm_stage_1_cfg *)
(((u8 *)stage_1_cfg) + RTCFG_ADDRSIZE_IP);
- saddr = *(u32*)stage_1_cfg->server_addr;
+ memcpy(&saddr, stage_1_cfg->server_addr, 4);
stage_1_cfg = (struct rtcfg_frm_stage_1_cfg *)
(((u8 *)stage_1_cfg) + RTCFG_ADDRSIZE_IP);
__rtskb_pull(rtskb, 2*RTCFG_ADDRSIZE_IP);
/* Broadcast: IP is used to address client */
if (rtskb->pkt_type == PACKET_BROADCAST) {
/* directed to us? */
@@ -748,6 +773,7 @@
struct rtcfg_frm_announce *announce_frm;
struct rtcfg_device *rtcfg_dev = &device[ifindex];
u32 i;
+ u32 announce_from_addr;
int result;
@@ -771,8 +797,10 @@
return -EINVAL;
}
+ memcpy(&announce_from_addr, announce_frm->addr, 4);
+
/* update routing table */
- rt_ip_route_add_host(*(u32 *)announce_frm->addr,
+ rt_ip_route_add_host(announce_from_addr,
rtskb->mac.ethernet->h_source,
rtskb->rtdev);
announce_frm = (struct rtcfg_frm_announce *)
@@ -1045,7 +1073,7 @@
return;
}
- ip = *(u32 *)dead_station_frm->logical_addr;
+ memcpy(&ip, dead_station_frm->logical_addr, 4);
/* only delete remote IPs from routing table */
if (rtskb->rtdev->local_ip != ip)
@@ -1132,11 +1160,11 @@
rtdev = rtskb->rtdev;
- daddr = *(u32*)stage_1_cfg->client_addr;
+ memcpy(&daddr, stage_1_cfg->client_addr, 4);
stage_1_cfg = (struct rtcfg_frm_stage_1_cfg *)
(((u8 *)stage_1_cfg) + RTCFG_ADDRSIZE_IP);
- saddr = *(u32*)stage_1_cfg->server_addr;
+ memcpy(&saddr, stage_1_cfg->server_addr, 4);
stage_1_cfg = (struct rtcfg_frm_stage_1_cfg *)
(((u8 *)stage_1_cfg) + RTCFG_ADDRSIZE_IP);
diff -ru rtnet-0.9.11_original/stack/rtcfg/rtcfg_event.c
rtnet-0.9.11/stack/rtcfg/rtcfg_event.c
--- rtnet-0.9.11_original/stack/rtcfg/rtcfg_event.c 2009-11-12
11:36:56.000000000 +0100
+++ rtnet-0.9.11/stack/rtcfg/rtcfg_event.c 2009-12-10 16:22:28.000000000
+0100
@@ -523,7 +532,7 @@
#ifdef CONFIG_RTNET_RTIPV4
case RTCFG_ADDR_IP:
if (((conn->addr_type & RTCFG_ADDR_MASK) == RTCFG_ADDR_IP)
&&
- (*(u32 *)announce->addr == conn->addr.ip_addr)) {
+ (memcmp(announce->addr, &(conn->addr.ip_addr), 4) ==
0)) {
/* save MAC address - Ethernet-specific! */
memcpy(conn->mac_addr, rtskb->mac.ethernet->h_source,
ETH_ALEN);
diff -ru rtnet-0.9.11_original/stack/rtcfg/rtcfg_frame.c
rtnet-0.9.11/stack/rtcfg/rtcfg_frame.c
--- rtnet-0.9.11_original/stack/rtcfg/rtcfg_frame.c 2009-11-12
11:36:56.000000000 +0100
+++ rtnet-0.9.11/stack/rtcfg/rtcfg_frame.c 2009-12-10 16:13:04.000000000
+0100
@@ -170,12 +170,12 @@
if (stage_1_frm->addr_type == RTCFG_ADDR_IP) {
rtskb_put(rtskb, 2*RTCFG_ADDRSIZE_IP);
- *(u32*)stage_1_frm->client_addr = conn->addr.ip_addr;
+ memcpy(stage_1_frm->client_addr, &(conn->addr.ip_addr), 4);
stage_1_frm = (struct rtcfg_frm_stage_1_cfg *)
(((u8 *)stage_1_frm) + RTCFG_ADDRSIZE_IP);
- *(u32*)stage_1_frm->server_addr = rtdev->local_ip;
+ memcpy(stage_1_frm->server_addr, &(rtdev->local_ip), 4);
stage_1_frm = (struct rtcfg_frm_stage_1_cfg *)
(((u8 *)stage_1_frm) + RTCFG_ADDRSIZE_IP);
@@ -332,7 +332,7 @@
if (announce_new->addr_type == RTCFG_ADDR_IP) {
rtskb_put(rtskb, RTCFG_ADDRSIZE_IP);
- *(u32*)announce_new->addr = rtdev->local_ip;
+ memcpy(announce_new->addr, &(rtdev->local_ip), 4);
announce_new = (struct rtcfg_frm_announce *)
(((u8 *)announce_new) + RTCFG_ADDRSIZE_IP);
@@ -388,7 +388,7 @@
if (announce_rpl->addr_type == RTCFG_ADDR_IP) {
rtskb_put(rtskb, RTCFG_ADDRSIZE_IP);
- *(u32*)announce_rpl->addr = rtdev->local_ip;
+ memcpy(announce_rpl->addr, &(rtdev->local_ip), 4);
announce_rpl = (struct rtcfg_frm_announce *)
(((u8 *)announce_rpl) + RTCFG_ADDRSIZE_IP);
@@ -512,7 +512,7 @@
if (dead_station_frm->addr_type == RTCFG_ADDR_IP) {
rtskb_put(rtskb, RTCFG_ADDRSIZE_IP);
- *(u32*)dead_station_frm->logical_addr = conn->addr.ip_addr;
+ memcpy(dead_station_frm->logical_addr, &(conn->addr.ip_addr), 4);
dead_station_frm = (struct rtcfg_frm_dead_station *)
(((u8 *)dead_station_frm) + RTCFG_ADDRSIZE_IP);
diff -ru rtnet-0.9.11_original/stack/rtmac/rtmac_proto.c
rtnet-0.9.11/stack/rtmac/rtmac_proto.c
--- rtnet-0.9.11_original/stack/rtmac/rtmac_proto.c 2009-11-12
11:36:56.000000000 +0100
+++ rtnet-0.9.11/stack/rtmac/rtmac_proto.c 2009-12-10 12:31:44.000000000
+0100
@@ -50,7 +50,8 @@
if (hdr->ver != RTMAC_VERSION) {
rtdm_printk("RTmac: received unsupported RTmac protocol version on
"
- "device %s\n", skb->rtdev->name);
+ "device %s. Got 0x%02x but expected 0x%02x.\n",
+ skb->rtdev->name, hdr->ver, RTMAC_VERSION);
goto error;
}
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