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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "database.h"
#include "event.h"
#include "handler.h"
#include "config.h"
#include "utils.h"
#include "packet-mac-lte.h"
#define DEFAULT_IP "127.0.0.1"
#define DEFAULT_PORT 9999
#define DEFAULT_LIVE_IP "127.0.0.1"
#define DEFAULT_LIVE_PORT 2021
#define NO_PREAMBLE -1
typedef struct {
int socket;
struct sockaddr_in to;
OBUF buf;
/* ul */
int ul_rnti;
int ul_frame;
int ul_subframe;
int ul_data;
/* dl */
int dl_rnti;
int dl_frame;
int dl_subframe;
int dl_data;
/* mib */
int mib_frame;
int mib_subframe;
int mib_data;
/* RA preamble */
int preamble_frame;
int preamble_subframe;
int preamble_preamble;
/* RAR */
int rar_rnti;
int rar_frame;
int rar_subframe;
int rar_data;
/* config */
int no_mib;
int no_sib;
int max_mib;
int max_sib;
int live;
/* runtime vars */
int cur_mib;
int cur_sib;
} ev_data;
void trace(ev_data *d, int direction, int rnti_type, int rnti,
int frame, int subframe, void *buf, int bufsize, int preamble) {
ssize_t ret;
int fsf;
int i;
d->buf.osize = 0;
PUTS(&d->buf, MAC_LTE_START_STRING);
PUTC(&d->buf, FDD_RADIO);
PUTC(&d->buf, direction);
PUTC(&d->buf, rnti_type);
if (rnti_type == C_RNTI || rnti_type == RA_RNTI) {
PUTC(&d->buf, MAC_LTE_RNTI_TAG);
PUTC(&d->buf, (rnti>>8) & 255);
PUTC(&d->buf, rnti & 255);
}
/* for newer version of wireshark? */
fsf = (frame << 4) + subframe;
/* for older version? */
//fsf = subframe;
PUTC(&d->buf, MAC_LTE_FRAME_SUBFRAME_TAG);
PUTC(&d->buf, (fsf>>8) & 255);
PUTC(&d->buf, fsf & 255);
if (preamble != NO_PREAMBLE) {
PUTC(&d->buf, MAC_LTE_SEND_PREAMBLE_TAG);
PUTC(&d->buf, preamble);
PUTC(&d->buf, 0); /* rach attempt - always 0 for us (not sure of this) */
}
PUTC(&d->buf, MAC_LTE_PAYLOAD_TAG);
for (i = 0; i < bufsize; i++)
PUTC(&d->buf, ((char *)buf)[i]);
ret = sendto(d->socket, d->buf.obuf, d->buf.osize, 0,
(struct sockaddr *)&d->to, sizeof(struct sockaddr_in));
if (ret != d->buf.osize) abort();
}
void ul(void *_d, event e) {
ev_data *d = _d;
trace(d, DIRECTION_UPLINK, C_RNTI, e.e[d->ul_rnti].i,
e.e[d->ul_frame].i, e.e[d->ul_subframe].i,
e.e[d->ul_data].b, e.e[d->ul_data].bsize,
NO_PREAMBLE);
}
void dl(void *_d, event e) {
ev_data *d = _d;
if (e.e[d->dl_rnti].i == 0xffff) {
if (d->no_sib) return;
if (d->max_sib && d->cur_sib == d->max_sib) return;
d->cur_sib++;
}
trace(d, DIRECTION_DOWNLINK,
e.e[d->dl_rnti].i != 0xffff ? C_RNTI : SI_RNTI, e.e[d->dl_rnti].i,
e.e[d->dl_frame].i, e.e[d->dl_subframe].i,
e.e[d->dl_data].b, e.e[d->dl_data].bsize,
NO_PREAMBLE);
}
void mib(void *_d, event e) {
ev_data *d = _d;
if (d->no_mib) return;
if (d->max_mib && d->cur_mib == d->max_mib) return;
d->cur_mib++;
trace(d, DIRECTION_DOWNLINK, NO_RNTI, 0,
e.e[d->mib_frame].i, e.e[d->mib_subframe].i,
e.e[d->mib_data].b, e.e[d->mib_data].bsize,
NO_PREAMBLE);
}
void preamble(void *_d, event e) {
ev_data *d = _d;
trace(d, DIRECTION_UPLINK, NO_RNTI, 0,
e.e[d->preamble_frame].i, e.e[d->preamble_subframe].i,
NULL, 0,
e.e[d->preamble_preamble].i);
}
void rar(void *_d, event e) {
ev_data *d = _d;
trace(d, DIRECTION_DOWNLINK, RA_RNTI, e.e[d->rar_rnti].i,
e.e[d->rar_frame].i, e.e[d->rar_subframe].i,
e.e[d->rar_data].b, e.e[d->rar_data].bsize,
NO_PREAMBLE);
}
void setup_data(ev_data *d, void *database, int ul_id, int dl_id, int mib_id,
int preamble_id, int rar_id) {
database_event_format f;
int i;
d->ul_rnti = -1;
d->ul_frame = -1;
d->ul_subframe = -1;
d->ul_data = -1;
d->dl_rnti = -1;
d->dl_frame = -1;
d->dl_subframe = -1;
d->dl_data = -1;
d->mib_frame = -1;
d->mib_subframe = -1;
d->mib_data = -1;
d->preamble_frame = -1;
d->preamble_subframe = -1;
d->preamble_preamble = -1;
d->rar_rnti = -1;
d->rar_frame = -1;
d->rar_subframe = -1;
d->rar_data = -1;
#define G(var_name, var_type, var) \
if (!strcmp(f.name[i], var_name)) { \
if (strcmp(f.type[i], var_type)) goto error; \
var = i; \
continue; \
}
/* ul: rnti, frame, subframe, data */
f = get_format(database, ul_id);
for (i = 0; i < f.count; i++) {
G("rnti", "int", d->ul_rnti);
G("frame", "int", d->ul_frame);
G("subframe", "int", d->ul_subframe);
G("data", "buffer", d->ul_data);
}
if (d->ul_rnti == -1 || d->ul_frame == -1 || d->ul_subframe == -1 ||
d->ul_data == -1) goto error;
/* dl: rnti, frame, subframe, data */
f = get_format(database, dl_id);
for (i = 0; i < f.count; i++) {
G("rnti", "int", d->dl_rnti);
G("frame", "int", d->dl_frame);
G("subframe", "int", d->dl_subframe);
G("data", "buffer", d->dl_data);
}
if (d->dl_rnti == -1 || d->dl_frame == -1 || d->dl_subframe == -1 ||
d->dl_data == -1) goto error;
/* MIB: frame, subframe, data */
f = get_format(database, mib_id);
for (i = 0; i < f.count; i++) {
G("frame", "int", d->mib_frame);
G("subframe", "int", d->mib_subframe);
G("data", "buffer", d->mib_data);
}
if (d->mib_frame == -1 || d->mib_subframe == -1 || d->mib_data == -1)
goto error;
/* preamble: frame, subframe, preamble */
f = get_format(database, preamble_id);
for (i = 0; i < f.count; i++) {
G("frame", "int", d->preamble_frame);
G("subframe", "int", d->preamble_subframe);
G("preamble", "int", d->preamble_preamble);
}
if (d->preamble_frame == -1 || d->preamble_subframe == -1 ||
d->preamble_preamble == -1) goto error;
/* rar: rnti, frame, subframe, data */
f = get_format(database, rar_id);
for (i = 0; i < f.count; i++) {
G("rnti", "int", d->rar_rnti);
G("frame", "int", d->rar_frame);
G("subframe", "int", d->rar_subframe);
G("data", "buffer", d->rar_data);
}
if (d->rar_rnti == -1 || d->rar_frame == -1 || d->rar_subframe == -1 ||
d->rar_data == -1) goto error;
#undef G
return;
error:
printf("bad T_messages.txt\n");
abort();
}
void *receiver(void *_d) {
ev_data *d = _d;
int s;
char buf[100000];
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s == -1) {
perror("socket");
abort();
}
if (bind(s, (struct sockaddr *)&d->to, sizeof(struct sockaddr_in)) == -1) {
perror("bind");
abort();
}
while (1) {
if (recv(s, buf, 100000, 0) <= 0) abort();
}
return 0;
}
void usage(void) {
printf(
"options:\n"
" -d <database file> this option is mandatory\n"
" -i <dump file> read events from this dump file\n"
" -ip <IP address> send packets to this IP address (default %s)\n"
" -p <port> send packets to this port (default %d)\n"
" -no-mib do not report MIB\n"
" -no-sib do not report SIBs\n"
" -max-mib <n> report at maximum n MIB\n"
" -max-sib <n> report at maximum n SIBs\n"
" -live run live\n"
" -live-ip <IP address> tracee's IP address (default %s)\n"
" -live-port <port> tracee's port (default %d)\n"
"-i and -live are mutually exclusive options. One of them must be provided\n"
"but not both.\n",
DEFAULT_IP,
DEFAULT_PORT,
DEFAULT_LIVE_IP,
DEFAULT_LIVE_PORT
);
exit(1);
}
int main(int n, char **v) {
char *database_filename = NULL;
char *input_filename = NULL;
void *database;
event_handler *h;
int in;
int i;
int ul_id, dl_id, mib_id = -1, preamble_id, rar_id;
ev_data d;
char *ip = DEFAULT_IP;
int port = DEFAULT_PORT;
char *live_ip = DEFAULT_LIVE_IP;
int live_port = DEFAULT_LIVE_PORT;
int live = 0;
memset(&d, 0, sizeof(ev_data));
for (i = 1; i < n; i++) {
if (!strcmp(v[i], "-h") || !strcmp(v[i], "--help")) usage();
if (!strcmp(v[i], "-d")) {
if (i > n-2) usage();
database_filename = v[++i];
continue;
}
if (!strcmp(v[i], "-i")) {
if (i > n-2) usage();
input_filename = v[++i];
continue;
}
if (!strcmp(v[i], "-ip")) {
if (i > n-2) usage();
ip = v[++i];
continue;
}
if (!strcmp(v[i], "-p")) {
if(i>n-2)usage();
port=atoi(v[++i]);
continue;
}
if (!strcmp(v[i], "-no-mib")) {
d.no_mib = 1;
continue;
}
if (!strcmp(v[i], "-no-sib")) {
d.no_sib = 1;
continue;
}
if (!strcmp(v[i], "-max-mib")) {
if (i > n-2) usage();
d.max_mib = atoi(v[++i]);
continue;
}
if (!strcmp(v[i], "-max-sib")) {
if (i > n-2) usage();
d.max_sib = atoi(v[++i]);
continue;
}
if (!strcmp(v[i], "-live")) {
live = 1;
continue;
}
if (!strcmp(v[i], "-live-ip")) {
if (i > n-2) usage();
live_ip = v[++i];
continue;
}
if (!strcmp(v[i], "-live-port")) {
if (i > n-2) usage();
live_port = atoi(v[++i]);
continue;
}
usage();
}
if (database_filename == NULL) {
printf("ERROR: provide a database file (-d)\n");
exit(1);
}
if (input_filename == NULL && live == 0) {
printf("ERROR: provide an input file (-i) or run live (-live)\n");
exit(1);
}
if (input_filename != NULL && live != 0) {
printf("ERROR: cannot use both -i and -live\n");
exit(1);
}
if (live == 0) {
in = open(input_filename, O_RDONLY);
if (in == -1) {
perror(input_filename);
return 1;
}
} else
in = connect_to(live_ip, live_port);
database = parse_database(database_filename);
load_config_file(database_filename);
h = new_handler(database);
if (live) {
char mt = 1;
int number_of_events = number_of_ids(database);
int *is_on = calloc(number_of_events, sizeof(int));
if (is_on == NULL) {
printf("ERROR: out of memory\n");
exit(1);
}
on_off(database, "ENB_MAC_UE_UL_PDU_WITH_DATA", is_on, 1);
on_off(database, "ENB_MAC_UE_DL_PDU_WITH_DATA", is_on, 1);
on_off(database, "ENB_PHY_MIB", is_on, 1);
on_off(database, "ENB_PHY_INITIATE_RA_PROCEDURE", is_on, 1);
on_off(database, "ENB_MAC_UE_DL_RAR_PDU_WITH_DATA", is_on, 1);
/* activate selected traces */
if (socket_send(in, &mt, 1) == -1 ||
socket_send(in, &number_of_events, sizeof(int)) == -1 ||
socket_send(in, is_on, number_of_events * sizeof(int)) == -1) {
printf("ERROR: socket_send failed\n");
exit(1);
}
free(is_on);
}
ul_id = event_id_from_name(database, "ENB_MAC_UE_UL_PDU_WITH_DATA");
dl_id = event_id_from_name(database, "ENB_MAC_UE_DL_PDU_WITH_DATA");
mib_id = event_id_from_name(database, "ENB_PHY_MIB");
preamble_id = event_id_from_name(database, "ENB_PHY_INITIATE_RA_PROCEDURE");
rar_id = event_id_from_name(database, "ENB_MAC_UE_DL_RAR_PDU_WITH_DATA");
setup_data(&d, database, ul_id, dl_id, mib_id, preamble_id, rar_id);
register_handler_function(h, ul_id, ul, &d);
register_handler_function(h, dl_id, dl, &d);
register_handler_function(h, mib_id, mib, &d);
register_handler_function(h, preamble_id, preamble, &d);
register_handler_function(h, rar_id, rar, &d);
d.socket = socket(AF_INET, SOCK_DGRAM, 0);
if (d.socket == -1) {
perror("socket");
exit(1);
}
d.to.sin_family = AF_INET;
d.to.sin_port = htons(port);
d.to.sin_addr.s_addr = inet_addr(ip);
new_thread(receiver, &d);
OBUF ebuf = { osize: 0, omaxsize: 0, obuf: NULL };
/* read messages */
while (1) {
event e;
e = get_event(in, &ebuf, database);
if (e.type == -1) break;
if (!(e.type == ul_id || e.type == dl_id || e.type == mib_id ||
e.type == preamble_id || e.type == rar_id)) continue;
handle_event(h, e);
}
return 0;
}