Cedric Roux
52cf61de97
Whenever the value T_BUFFER_MAX changes, the tracers had to be recompiled. The only reason why it was needed is because we used some fixed size buffers to read events. This commit removes this restriction. Also, with the basic simulator, this value T_BUFFER_MAX now comes with an #ifdef which would have required some special hackish-level tricks in the tracers, which is not good. Let's just allocate memory when needed.
262 lines
6.2 KiB
C
262 lines
6.2 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include "database.h"
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#include "event.h"
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#include "handler.h"
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#include "config.h"
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#include "utils.h"
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#include "packet-mac-lte.h"
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#define DEFAULT_IP "127.0.0.1"
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#define DEFAULT_PORT 9999
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typedef struct {
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int socket;
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struct sockaddr_in to;
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OBUF buf;
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/* ul */
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int ul_rnti;
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int ul_frame;
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int ul_subframe;
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int ul_data;
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/* dl */
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int dl_rnti;
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int dl_frame;
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int dl_subframe;
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int dl_data;
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} ev_data;
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void ul(void *_d, event e)
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{
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ev_data *d = _d;
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ssize_t ret;
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int fsf;
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int i;
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d->buf.osize = 0;
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PUTS(&d->buf, MAC_LTE_START_STRING);
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PUTC(&d->buf, FDD_RADIO);
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PUTC(&d->buf, DIRECTION_UPLINK);
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PUTC(&d->buf, C_RNTI);
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PUTC(&d->buf, MAC_LTE_RNTI_TAG);
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PUTC(&d->buf, (e.e[d->ul_rnti].i>>8) & 255);
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PUTC(&d->buf, e.e[d->ul_rnti].i & 255);
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/* for newer version of wireshark? */
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fsf = (e.e[d->ul_frame].i << 4) + e.e[d->ul_subframe].i;
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/* for older version? */
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fsf = e.e[d->ul_subframe].i;
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PUTC(&d->buf, MAC_LTE_FRAME_SUBFRAME_TAG);
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PUTC(&d->buf, (fsf>>8) & 255);
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PUTC(&d->buf, fsf & 255);
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PUTC(&d->buf, MAC_LTE_PAYLOAD_TAG);
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for (i = 0; i < e.e[d->ul_data].bsize; i++)
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PUTC(&d->buf, ((char*)e.e[d->ul_data].b)[i]);
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ret = sendto(d->socket, d->buf.obuf, d->buf.osize, 0,
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(struct sockaddr *)&d->to, sizeof(struct sockaddr_in));
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if (ret != d->buf.osize) abort();
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}
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void dl(void *_d, event e)
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{
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ev_data *d = _d;
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ssize_t ret;
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int fsf;
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int i;
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d->buf.osize = 0;
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PUTS(&d->buf, MAC_LTE_START_STRING);
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PUTC(&d->buf, FDD_RADIO);
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PUTC(&d->buf, DIRECTION_DOWNLINK);
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PUTC(&d->buf, C_RNTI);
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PUTC(&d->buf, MAC_LTE_RNTI_TAG);
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PUTC(&d->buf, (e.e[d->dl_rnti].i>>8) & 255);
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PUTC(&d->buf, e.e[d->dl_rnti].i & 255);
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/* for newer version of wireshark? */
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fsf = (e.e[d->dl_frame].i << 4) + e.e[d->dl_subframe].i;
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/* for older version? */
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fsf = e.e[d->dl_subframe].i;
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PUTC(&d->buf, MAC_LTE_FRAME_SUBFRAME_TAG);
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PUTC(&d->buf, (fsf>>8) & 255);
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PUTC(&d->buf, fsf & 255);
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PUTC(&d->buf, MAC_LTE_PAYLOAD_TAG);
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for (i = 0; i < e.e[d->dl_data].bsize; i++)
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PUTC(&d->buf, ((char*)e.e[d->dl_data].b)[i]);
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ret = sendto(d->socket, d->buf.obuf, d->buf.osize, 0,
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(struct sockaddr *)&d->to, sizeof(struct sockaddr_in));
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if (ret != d->buf.osize) abort();
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}
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void setup_data(ev_data *d, void *database, int ul_id, int dl_id)
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{
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database_event_format f;
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int i;
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d->ul_rnti = -1;
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d->ul_frame = -1;
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d->ul_subframe = -1;
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d->ul_data = -1;
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d->dl_rnti = -1;
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d->dl_frame = -1;
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d->dl_subframe = -1;
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d->dl_data = -1;
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#define G(var_name, var_type, var) \
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if (!strcmp(f.name[i], var_name)) { \
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if (strcmp(f.type[i], var_type)) goto error; \
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var = i; \
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continue; \
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}
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/* ul: rnti, frame, subframe, data */
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f = get_format(database, ul_id);
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for (i = 0; i < f.count; i++) {
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G("rnti", "int", d->ul_rnti);
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G("frame", "int", d->ul_frame);
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G("subframe", "int", d->ul_subframe);
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G("data", "buffer", d->ul_data);
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}
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if (d->ul_rnti == -1 || d->ul_frame == -1 || d->ul_subframe == -1 ||
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d->ul_data == -1) goto error;
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/* dl: rnti, frame, subframe, data */
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f = get_format(database, dl_id);
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for (i = 0; i < f.count; i++) {
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G("rnti", "int", d->dl_rnti);
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G("frame", "int", d->dl_frame);
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G("subframe", "int", d->dl_subframe);
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G("data", "buffer", d->dl_data);
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}
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if (d->dl_rnti == -1 || d->dl_frame == -1 || d->dl_subframe == -1 ||
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d->dl_data == -1) goto error;
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#undef G
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return;
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error:
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printf("bad T_messages.txt\n");
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abort();
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}
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void *receiver(void *_d)
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{
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ev_data *d = _d;
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int s;
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char buf[100000];
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s = socket(AF_INET, SOCK_DGRAM, 0);
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if (s == -1) { perror("socket"); abort(); }
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if (bind(s, (struct sockaddr *)&d->to, sizeof(struct sockaddr_in)) == -1)
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{ perror("bind"); abort(); }
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while (1) {
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if (recv(s, buf, 100000, 0) <= 0) abort();
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}
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return 0;
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}
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void usage(void)
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{
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printf(
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"options:\n"
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" -d <database file> this option is mandatory\n"
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" -i <dump file> read events from this dump file\n"
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" -ip <IP address> send packets to this IP address (default %s)\n"
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" -p <port> send packets to this port (default %d)\n",
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DEFAULT_IP,
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DEFAULT_PORT
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);
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exit(1);
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}
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int main(int n, char **v)
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{
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char *database_filename = NULL;
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char *input_filename = NULL;
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void *database;
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event_handler *h;
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int in;
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int i;
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int ul_id, dl_id;
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ev_data d;
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char *ip = DEFAULT_IP;
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int port = DEFAULT_PORT;
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memset(&d, 0, sizeof(ev_data));
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for (i = 1; i < n; i++) {
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if (!strcmp(v[i], "-h") || !strcmp(v[i], "--help")) usage();
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if (!strcmp(v[i], "-d"))
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{ if (i > n-2) usage(); database_filename = v[++i]; continue; }
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if (!strcmp(v[i], "-i"))
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{ if (i > n-2) usage(); input_filename = v[++i]; continue; }
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if (!strcmp(v[i], "-ip")) { if (i > n-2) usage(); ip = v[++i]; continue; }
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if (!strcmp(v[i], "-p")) {if(i>n-2)usage(); port=atoi(v[++i]); continue; }
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usage();
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}
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if (database_filename == NULL) {
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printf("ERROR: provide a database file (-d)\n");
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exit(1);
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}
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if (input_filename == NULL) {
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printf("ERROR: provide an input file (-i)\n");
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exit(1);
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}
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in = open(input_filename, O_RDONLY);
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if (in == -1) { perror(input_filename); return 1; }
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database = parse_database(database_filename);
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load_config_file(database_filename);
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h = new_handler(database);
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ul_id = event_id_from_name(database, "ENB_MAC_UE_UL_PDU_WITH_DATA");
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dl_id = event_id_from_name(database, "ENB_MAC_UE_DL_PDU_WITH_DATA");
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setup_data(&d, database, ul_id, dl_id);
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register_handler_function(h, ul_id, ul, &d);
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register_handler_function(h, dl_id, dl, &d);
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d.socket = socket(AF_INET, SOCK_DGRAM, 0);
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if (d.socket == -1) { perror("socket"); exit(1); }
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d.to.sin_family = AF_INET;
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d.to.sin_port = htons(port);
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d.to.sin_addr.s_addr = inet_addr(ip);
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new_thread(receiver, &d);
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OBUF ebuf = { osize: 0, omaxsize: 0, obuf: NULL };
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/* read messages */
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while (1) {
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event e;
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e = get_event(in, &ebuf, database);
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if (e.type == -1) break;
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if (!(e.type == ul_id || e.type == dl_id)) continue;
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handle_event(h, e);
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}
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return 0;
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}
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