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abis_nm.c: Reading the in_addr can lead to unaligned memory access

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The value of the in_addr might not be 32 bit aligned and reading
it can generate an alignment error on ARM. Fix it by using memcpy
to copy the data into a local variable.

There are many more potential alignment issues that we will fix
when we hit them.
This commit is contained in:
Holger Hans Peter Freyther
2010-06-21 10:22:26 +08:00
parent 34949ae924
commit 1afbd76155
1 changed files with 7 additions and 4 deletions
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11
openbsc/src/abis_nm.c
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@@ -2704,6 +2704,7 @@ static const char ipaccess_magic[] = "com.ipaccess";
static int abis_nm_rx_ipacc(struct msgb *msg)
{
struct in_addr addr;
struct abis_om_hdr *oh = msgb_l2(msg);
struct abis_om_fom_hdr *foh;
u_int8_t idstrlen = oh->data[0];
@@ -2725,10 +2726,12 @@ static int abis_nm_rx_ipacc(struct msgb *msg)
switch (foh->msg_type) {
case NM_MT_IPACC_RSL_CONNECT_ACK:
DEBUGPC(DNM, "RSL CONNECT ACK ");
if (TLVP_PRESENT(&tp, NM_ATT_IPACC_DST_IP))
DEBUGPC(DNM, "IP=%s ",
inet_ntoa(*((struct in_addr *)
TLVP_VAL(&tp, NM_ATT_IPACC_DST_IP))));
if (TLVP_PRESENT(&tp, NM_ATT_IPACC_DST_IP)) {
memcpy(&addr,
TLVP_VAL(&tp, NM_ATT_IPACC_DST_IP), sizeof(addr));
DEBUGPC(DNM, "IP=%s ", inet_ntoa(addr));
}
if (TLVP_PRESENT(&tp, NM_ATT_IPACC_DST_IP_PORT))
DEBUGPC(DNM, "PORT=%u ",
ntohs(*((u_int16_t *)