fixeria
/
lcr
1
0
Fork 0
Code Pull Requests Releases Wiki Activity

gsm: Verify the MNCC_VERSION of the BSC/MS and close the socket on mismatch 

The BSC/MS will send a Hello packet that includes the version number,
make LCR verify this version number and close the socket in case it
does not match a supported version.
This commit is contained in:
Holger Hans Peter Freyther 2011-10-21 14:11:04 +02:00 committed by Andreas Eversberg
parent e2c8d0790d
commit fa5274af2b
2 changed files with 19 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
gsm.cpp
View File

@ -1334,6 +1334,7 @@ static int mncc_fd_read(struct lcr_fd *lfd, void *inst, int idx)
int rc;
static char buf[sizeof(struct gsm_mncc)+1024];
struct gsm_mncc *mncc_prim = (struct gsm_mncc *) buf;
struct gsm_mncc_hello *hello = (struct gsm_mncc_hello *) buf;
memset(buf, 0, sizeof(buf));
rc = recv(lfd->fd, buf, sizeof(buf), 0);
@ -1342,6 +1343,17 @@ static int mncc_fd_read(struct lcr_fd *lfd, void *inst, int idx)
if (rc < 0)
return rc;
/* TODO: size check? */
switch (mncc_prim->msg_type) {
case MNCC_SOCKET_HELLO:
if (hello->version != MNCC_SOCK_VERSION) {
PERROR("MNCC version different. BSC version is %u\n", hello->version);
mncc_fd_close(lcr_gsm, lfd);
return 0;
}
break;
}
/* Hand the MNCC message into LCR */
switch (lcr_gsm->type) {
#ifdef WITH_GSM_BS

7
mncc.h
View File

@ -62,6 +62,8 @@
#define GSM_TCH_FRAME_AMR 0x0303
#define GSM_BAD_FRAME 0x03ff
#define MNCC_SOCKET_HELLO 0x0400
#define GSM_MAX_FACILITY 128
#define GSM_MAX_SSVERSION 128
#define GSM_MAX_USERUSER 128
@ -326,3 +328,8 @@ struct gsm_mncc_rtp {
};
#define MNCC_SOCK_VERSION 1
struct gsm_mncc_hello {
u_int32_t msg_type;
u_int32_t version;
};