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osmo-bsc
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Use the right network/link type, prepend the vISDN header... 

Now only the LAPD header is invalid...
This commit is contained in:
Harald Welte 2009-01-03 01:32:00 +00:00
parent ca6bf7815a
commit 62a923d46a
1 changed files with 24 additions and 4 deletions
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28
src/misdn.c
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@ -52,7 +52,7 @@
* pcap writing of the misdn load
* pcap format is from http://wiki.wireshark.org/Development/LibpcapFileFormat
*/
#define WTAP_ENCAP_ISDN 17
#define DLT_LINUX_LAPD 177
#define PCAP_INPUT 0
#define PCAP_OUTPUT 1
@ -73,6 +73,11 @@ struct pcaprec_hdr {
u_int32_t orig_len;
} __attribute__((packed));
struct pseudo_isdn_header {
int32_t uton;
u_int8_t channel;
} __attribute__((packed));
struct fake_lapd_frame {
u_int8_t ea1 : 1;
u_int8_t cr : 1;
@ -94,13 +99,14 @@ void mi_set_pcap_fd(int fd)
.thiszone = 0,
.sigfigs = 0,
.snaplen = 65535,
.network = WTAP_ENCAP_ISDN,
.network = DLT_LINUX_LAPD,
};
pcap_fd = fd;
ret = write(pcap_fd, &header, sizeof(header));
}
/* This currently only works for the D-Channel */
static void write_pcap_packet(int direction, struct sockaddr_mISDN* addr,
struct msgb *msg) {
if (pcap_fd < 0)
@ -109,6 +115,13 @@ static void write_pcap_packet(int direction, struct sockaddr_mISDN* addr,
int ret;
time_t cur_time;
struct tm *tm;
struct pseudo_isdn_header isdn = {
/* user to network.. we are the network.. gboolean is a init */
.uton = 0,
.channel = addr->channel,
};
struct fake_lapd_frame header = {
.ea1 = 0,
.cr = PCAP_OUTPUT ? 1 : 0,
@ -121,15 +134,22 @@ static void write_pcap_packet(int direction, struct sockaddr_mISDN* addr,
struct pcaprec_hdr payload_header = {
.ts_sec = 0,
.ts_usec = 0,
.incl_len = msg->len + sizeof(header) - MISDN_HEADER_LEN,
.orig_len = msg->len + sizeof(header) - MISDN_HEADER_LEN,
.incl_len = msg->len + sizeof(struct fake_lapd_frame)
+ sizeof(struct pseudo_isdn_header)
- MISDN_HEADER_LEN,
.orig_len = msg->len + sizeof(struct fake_lapd_frame)
+ sizeof(struct pseudo_isdn_header)
- MISDN_HEADER_LEN,
};
cur_time = time(NULL);
tm = localtime(&cur_time);
payload_header.ts_sec = mktime(tm);
ret = write(pcap_fd, &payload_header, sizeof(payload_header));
ret = write(pcap_fd, &isdn, sizeof(isdn));
ret = write(pcap_fd, &header, sizeof(header));
ret = write(pcap_fd, msg->data + MISDN_HEADER_LEN,
msg->len - MISDN_HEADER_LEN);