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libbsc, osmo-bsc{, _nat}: Prevent unaligned access when casting TLVP_VAL

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foo = *((uintXX_t *) TLVP_VAL(...) can lead to unaligned access. To
prevent that use tlvp_valXX_unal() to get the values.
This commit is contained in:
Daniel Willmann
2014-06-27 17:05:47 +02:00
committed by Holger Hans Peter Freyther
parent 99a20d6be1
commit 8a485f0bec
3 changed files with 7 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
openbsc/src/libbsc/abis_rsl.c
View File

@@ -1804,20 +1804,20 @@ static void ipac_parse_rtp(struct gsm_lchan *lchan, struct tlv_parsed *tv)
uint16_t port, conn_id;
if (TLVP_PRESENT(tv, RSL_IE_IPAC_LOCAL_IP)) {
ip.s_addr = *((uint32_t *) TLVP_VAL(tv, RSL_IE_IPAC_LOCAL_IP));
ip.s_addr = tlvp_val32_unal(tv, RSL_IE_IPAC_LOCAL_IP);
DEBUGPC(DRSL, "LOCAL_IP=%s ", inet_ntoa(ip));
lchan->abis_ip.bound_ip = ntohl(ip.s_addr);
}
if (TLVP_PRESENT(tv, RSL_IE_IPAC_LOCAL_PORT)) {
port = *((uint16_t *) TLVP_VAL(tv, RSL_IE_IPAC_LOCAL_PORT));
port = tlvp_val16_unal(tv, RSL_IE_IPAC_LOCAL_PORT);
port = ntohs(port);
DEBUGPC(DRSL, "LOCAL_PORT=%u ", port);
lchan->abis_ip.bound_port = port;
}
if (TLVP_PRESENT(tv, RSL_IE_IPAC_CONN_ID)) {
conn_id = *((uint16_t *) TLVP_VAL(tv, RSL_IE_IPAC_CONN_ID));
conn_id = tlvp_val16_unal(tv, RSL_IE_IPAC_CONN_ID);
conn_id = ntohs(conn_id);
DEBUGPC(DRSL, "CON_ID=%u ", conn_id);
lchan->abis_ip.conn_id = conn_id;
@@ -1838,13 +1838,13 @@ static void ipac_parse_rtp(struct gsm_lchan *lchan, struct tlv_parsed *tv)
}
if (TLVP_PRESENT(tv, RSL_IE_IPAC_REMOTE_IP)) {
ip.s_addr = *((uint32_t *) TLVP_VAL(tv, RSL_IE_IPAC_REMOTE_IP));
ip.s_addr = tlvp_val32_unal(tv, RSL_IE_IPAC_REMOTE_IP);
DEBUGPC(DRSL, "REMOTE_IP=%s ", inet_ntoa(ip));
lchan->abis_ip.connect_ip = ntohl(ip.s_addr);
}
if (TLVP_PRESENT(tv, RSL_IE_IPAC_REMOTE_PORT)) {
port = *((uint16_t *) TLVP_VAL(tv, RSL_IE_IPAC_REMOTE_PORT));
port = tlvp_val16_unal(tv, RSL_IE_IPAC_REMOTE_PORT);
port = ntohs(port);
DEBUGPC(DRSL, "REMOTE_PORT=%u ", port);
lchan->abis_ip.connect_port = port;

2
openbsc/src/osmo-bsc/osmo_bsc_bssap.c
View File

@@ -135,7 +135,7 @@ static int bssmap_handle_paging(struct osmo_msc_data *msc,
if (TLVP_PRESENT(&tp, GSM0808_IE_TMSI) &&
TLVP_LEN(&tp, GSM0808_IE_TMSI) == 4) {
tmsi = ntohl(*(uint32_t *) TLVP_VAL(&tp, GSM0808_IE_TMSI));
tmsi = ntohl(tlvp_val32_unal(&tp, GSM0808_IE_TMSI));
}
/*

2
openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c
View File

@@ -191,7 +191,7 @@ int bsc_mgcp_assign_patch(struct nat_sccp_connection *con, struct msgb *msg)
return -1;
}
cic = ntohs(*(uint16_t *)TLVP_VAL(&tp, GSM0808_IE_CIRCUIT_IDENTITY_CODE));
cic = ntohs(tlvp_val16_unal(&tp, GSM0808_IE_CIRCUIT_IDENTITY_CODE));
timeslot = cic & 0x1f;
multiplex = (cic & ~0x1f) >> 5;