forked from osmocom/wireshark
sharkd: various cleanups.
Extend sharkd_dissect_request() so that it can replace sharkd_dissect_columns(). Have it return a status indicating success, invalid frame number, or read error, so that the caller knows what the problem is. Pass it pointers to the wtap_rec and Buffer to use when reading packets from the file, so that if it's called in a loop iterating over all frames, those structures can be initialized once, before the loop, and cleaned up once, after the loop, rather than doing both once per loop iteration. Pass pointers to the read error code and additional read error information string pointer, so that, on a file read error, that information is available to the caller. Get rid of sharkd_dissect_columns(); instead, use sharkd_dissect_request(), with code from the loop body pulled into a callback routine. Fix that code to correctly determine whether the current frame has any comments, rather than just treating all frames that have blocks as having comments. Use _U_ to mark arguments as unused, rather than throwing in a (void) variablename; statement. Move some variables used only within a loop into the for() statement or the loop body.
This commit is contained in:
Guy Harris
parent
379352ef7f
commit
c4731738fc
91
sharkd.c
91
sharkd.c
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@ -502,30 +502,25 @@ sharkd_get_frame(guint32 framenum)
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return frame_data_sequence_find(cfile.provider.frames, framenum);
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}
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int
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sharkd_dissect_request(guint32 framenum, guint32 frame_ref_num, guint32 prev_dis_num, sharkd_dissect_func_t cb, guint32 dissect_flags, void *data)
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enum dissect_request_status
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sharkd_dissect_request(guint32 framenum, guint32 frame_ref_num,
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guint32 prev_dis_num, wtap_rec *rec, Buffer *buf,
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column_info *cinfo, guint32 dissect_flags,
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sharkd_dissect_func_t cb, void *data,
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int *err, gchar **err_info)
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{
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frame_data *fdata;
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column_info *cinfo = (dissect_flags & SHARKD_DISSECT_FLAG_COLUMNS) ? &cfile.cinfo : NULL;
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epan_dissect_t edt;
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gboolean create_proto_tree;
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wtap_rec rec; /* Record metadata */
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Buffer buf; /* Record data */
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int err;
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char *err_info = NULL;
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fdata = sharkd_get_frame(framenum);
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if (fdata == NULL)
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return -1;
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return DISSECT_REQUEST_NO_SUCH_FRAME;
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wtap_rec_init(&rec);
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ws_buffer_init(&buf, 1514);
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if (!wtap_seek_read(cfile.provider.wth, fdata->file_off, &rec, &buf, &err, &err_info)) {
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wtap_rec_cleanup(&rec);
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ws_buffer_free(&buf);
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return -1; /* error reading the record */
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if (!wtap_seek_read(cfile.provider.wth, fdata->file_off, rec, buf, err, err_info)) {
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if (cinfo != NULL)
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col_fill_in_error(cinfo, fdata, FALSE, FALSE /* fill_fd_columns */);
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return DISSECT_REQUEST_READ_ERROR; /* error reading the record */
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}
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create_proto_tree = ((dissect_flags & SHARKD_DISSECT_FLAG_PROTO_TREE) ||
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@ -548,8 +543,8 @@ sharkd_dissect_request(guint32 framenum, guint32 frame_ref_num, guint32 prev_dis
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fdata->ref_time = (framenum == frame_ref_num);
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fdata->frame_ref_num = frame_ref_num;
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fdata->prev_dis_num = prev_dis_num;
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epan_dissect_run(&edt, cfile.cd_t, &rec,
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frame_tvbuff_new_buffer(&cfile.provider, fdata, &buf),
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epan_dissect_run(&edt, cfile.cd_t, rec,
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frame_tvbuff_new_buffer(&cfile.provider, fdata, buf),
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fdata, cinfo);
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if (cinfo) {
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@ -562,65 +557,7 @@ sharkd_dissect_request(guint32 framenum, guint32 frame_ref_num, guint32 prev_dis
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data);
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epan_dissect_cleanup(&edt);
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wtap_rec_cleanup(&rec);
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ws_buffer_free(&buf);
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return 0;
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}
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/* based on packet_list_dissect_and_cache_record */
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int
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sharkd_dissect_columns(frame_data *fdata, guint32 frame_ref_num, guint32 prev_dis_num, column_info *cinfo, gboolean dissect_color)
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{
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epan_dissect_t edt;
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gboolean create_proto_tree;
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wtap_rec rec; /* Record metadata */
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Buffer buf; /* Record data */
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int err;
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char *err_info = NULL;
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wtap_rec_init(&rec);
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ws_buffer_init(&buf, 1514);
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if (!wtap_seek_read(cfile.provider.wth, fdata->file_off, &rec, &buf, &err, &err_info)) {
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col_fill_in_error(cinfo, fdata, FALSE, FALSE /* fill_fd_columns */);
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wtap_rec_cleanup(&rec);
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ws_buffer_free(&buf);
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return -1; /* error reading the record */
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}
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create_proto_tree = (dissect_color && color_filters_used()) || (cinfo && have_custom_cols(cinfo));
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epan_dissect_init(&edt, cfile.epan, create_proto_tree, FALSE /* proto_tree_visible */);
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if (dissect_color) {
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color_filters_prime_edt(&edt);
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fdata->need_colorize = 1;
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}
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if (cinfo)
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col_custom_prime_edt(&edt, cinfo);
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/*
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* XXX - need to catch an OutOfMemoryError exception and
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* attempt to recover from it.
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*/
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fdata->ref_time = (fdata->num == frame_ref_num);
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fdata->frame_ref_num = frame_ref_num;
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fdata->prev_dis_num = prev_dis_num;
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epan_dissect_run(&edt, cfile.cd_t, &rec,
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frame_tvbuff_new_buffer(&cfile.provider, fdata, &buf),
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fdata, cinfo);
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if (cinfo) {
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/* "Stringify" non frame_data vals */
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epan_dissect_fill_in_columns(&edt, FALSE, TRUE/* fill_fd_columns */);
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}
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epan_dissect_cleanup(&edt);
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wtap_rec_cleanup(&rec);
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ws_buffer_free(&buf);
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return 0;
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return DISSECT_REQUEST_SUCCESS;
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}
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int
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13
sharkd.h
13
sharkd.h
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@ -34,8 +34,17 @@ int sharkd_load_cap_file(void);
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int sharkd_retap(void);
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int sharkd_filter(const char *dftext, guint8 **result);
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frame_data *sharkd_get_frame(guint32 framenum);
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int sharkd_dissect_columns(frame_data *fdata, guint32 frame_ref_num, guint32 prev_dis_num, column_info *cinfo, gboolean dissect_color);
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int sharkd_dissect_request(guint32 framenum, guint32 frame_ref_num, guint32 prev_dis_num, sharkd_dissect_func_t cb, guint32 dissect_flags, void *data);
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enum dissect_request_status {
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DISSECT_REQUEST_SUCCESS,
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DISSECT_REQUEST_NO_SUCH_FRAME,
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DISSECT_REQUEST_READ_ERROR
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};
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enum dissect_request_status
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sharkd_dissect_request(guint32 framenum, guint32 frame_ref_num,
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guint32 prev_dis_num, wtap_rec *rec, Buffer *buf,
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column_info *cinfo, guint32 dissect_flags,
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sharkd_dissect_func_t cb, void *data,
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int *err, gchar **err_info);
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wtap_block_t sharkd_get_modified_block(const frame_data *fd);
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wtap_block_t sharkd_get_packet_block(const frame_data *fd);
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int sharkd_set_modified_block(frame_data *fd, wtap_block_t new_block);
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211
sharkd_session.c
211
sharkd_session.c
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@ -1139,16 +1139,13 @@ struct sharkd_analyse_data
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};
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static void
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sharkd_session_process_analyse_cb(epan_dissect_t *edt, proto_tree *tree, struct epan_column_info *cinfo, const GSList *data_src, void *data)
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sharkd_session_process_analyse_cb(epan_dissect_t *edt, proto_tree *tree _U_,
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struct epan_column_info *cinfo _U_, const GSList *data_src _U_, void *data)
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{
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struct sharkd_analyse_data *analyser = (struct sharkd_analyse_data *) data;
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packet_info *pi = &edt->pi;
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frame_data *fdata = pi->fd;
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(void) tree;
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(void) cinfo;
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(void) data_src;
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if (analyser->first_time == NULL || nstime_cmp(&fdata->abs_ts, analyser->first_time) < 0)
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analyser->first_time = &fdata->abs_ts;
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@ -1187,8 +1184,9 @@ sharkd_session_process_analyse_cb(epan_dissect_t *edt, proto_tree *tree, struct
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static void
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sharkd_session_process_analyse(void)
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{
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unsigned int framenum;
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struct sharkd_analyse_data analyser;
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wtap_rec rec; /* Record metadata */
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Buffer rec_buf; /* Record data */
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analyser.first_time = NULL;
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analyser.last_time = NULL;
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@ -1199,8 +1197,40 @@ sharkd_session_process_analyse(void)
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sharkd_json_value_anyf("frames", "%u", cfile.count);
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sharkd_json_array_open("protocols");
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for (framenum = 1; framenum <= cfile.count; framenum++)
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sharkd_dissect_request(framenum, (framenum != 1) ? 1 : 0, framenum - 1, &sharkd_session_process_analyse_cb, SHARKD_DISSECT_FLAG_NULL, &analyser);
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wtap_rec_init(&rec);
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ws_buffer_init(&rec_buf, 1514);
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for (guint32 framenum = 1; framenum <= cfile.count; framenum++)
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{
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enum dissect_request_status status;
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int err;
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gchar *err_info;
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status = sharkd_dissect_request(framenum,
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(framenum != 1) ? 1 : 0, framenum - 1,
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&rec, &rec_buf, NULL, SHARKD_DISSECT_FLAG_NULL,
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&sharkd_session_process_analyse_cb, &analyser,
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&err, &err_info);
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switch (status) {
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case DISSECT_REQUEST_SUCCESS:
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break;
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case DISSECT_REQUEST_NO_SUCH_FRAME:
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/* XXX - report the error. */
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break;
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case DISSECT_REQUEST_READ_ERROR:
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/*
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* Free up the error string.
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* XXX - report the error.
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*/
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g_free(err_info);
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break;
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}
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}
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sharkd_json_array_close();
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if (analyser.first_time)
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@ -1211,6 +1241,9 @@ sharkd_session_process_analyse(void)
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sharkd_json_result_epilogue();
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wtap_rec_cleanup(&rec);
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ws_buffer_free(&rec_buf);
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g_hash_table_destroy(analyser.protocols_set);
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}
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@ -1286,6 +1319,58 @@ sharkd_session_create_columns(column_info *cinfo, const char *buf, const jsmntok
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return cinfo;
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}
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static void
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sharkd_session_process_frames_cb(epan_dissect_t *edt, proto_tree *tree _U_,
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struct epan_column_info *cinfo, const GSList *data_src _U_, void *data _U_)
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{
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packet_info *pi = &edt->pi;
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frame_data *fdata = pi->fd;
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wtap_block_t pkt_block = NULL;
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char *comment;
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json_dumper_begin_object(&dumper);
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sharkd_json_array_open("c");
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for (int col = 0; col < cinfo->num_cols; ++col)
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{
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const col_item_t *col_item = &cinfo->columns[col];
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sharkd_json_value_string(NULL, col_item->col_data);
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}
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sharkd_json_array_close();
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sharkd_json_value_anyf("num", "%u", pi->num);
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/*
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* Get the block for this record, if it has one.
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*/
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if (fdata->has_modified_block)
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pkt_block = sharkd_get_modified_block(fdata);
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else if (fdata->has_phdr_block)
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pkt_block = pi->rec->block;
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/*
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* Does this record have any comments?
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*/
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if (pkt_block != NULL &&
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WTAP_OPTTYPE_SUCCESS == wtap_block_get_nth_string_option_value(pkt_block, OPT_COMMENT, 0, &comment))
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sharkd_json_value_anyf("ct", "true");
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if (fdata->ignored)
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sharkd_json_value_anyf("i", "true");
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if (fdata->marked)
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sharkd_json_value_anyf("m", "true");
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if (fdata->color_filter)
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{
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sharkd_json_value_stringf("bg", "%x", color_t_to_rgb(&fdata->color_filter->bg_color));
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sharkd_json_value_stringf("fg", "%x", color_t_to_rgb(&fdata->color_filter->fg_color));
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}
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json_dumper_end_object(&dumper);
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}
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/**
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* sharkd_session_process_frames()
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*
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@ -1319,13 +1404,13 @@ sharkd_session_process_frames(const char *buf, const jsmntok_t *tokens, int coun
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const guint8 *filter_data = NULL;
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int col;
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guint32 framenum, prev_dis_num = 0;
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guint32 prev_dis_num = 0;
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guint32 current_ref_frame = 0, next_ref_frame = G_MAXUINT32;
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guint32 skip;
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guint32 limit;
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wtap_rec rec; /* Record metadata */
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Buffer rec_buf; /* Record data */
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column_info *cinfo = &cfile.cinfo;
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column_info user_cinfo;
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@ -1382,10 +1467,16 @@ sharkd_session_process_frames(const char *buf, const jsmntok_t *tokens, int coun
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sharkd_json_result_array_prologue(rpcid);
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for (framenum = 1; framenum <= cfile.count; framenum++)
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wtap_rec_init(&rec);
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ws_buffer_init(&rec_buf, 1514);
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for (guint32 framenum = 1; framenum <= cfile.count; framenum++)
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{
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frame_data *fdata;
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guint32 ref_frame = (framenum != 1) ? 1 : 0;
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enum dissect_request_status status;
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int err;
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gchar *err_info;
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if (filter_data && !(filter_data[framenum / 8] & (1 << (framenum % 8))))
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continue;
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@ -1429,40 +1520,30 @@ sharkd_session_process_frames(const char *buf, const jsmntok_t *tokens, int coun
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}
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fdata = sharkd_get_frame(framenum);
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sharkd_dissect_columns(fdata, ref_frame, prev_dis_num, cinfo, (fdata->color_filter == NULL));
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status = sharkd_dissect_request(framenum,
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(framenum != 1) ? 1 : 0, framenum - 1,
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&rec, &rec_buf, cinfo,
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(fdata->color_filter == NULL) ? SHARKD_DISSECT_FLAG_COLOR : SHARKD_DISSECT_FLAG_NULL,
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&sharkd_session_process_frames_cb, NULL,
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&err, &err_info);
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switch (status) {
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json_dumper_begin_object(&dumper);
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case DISSECT_REQUEST_SUCCESS:
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break;
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sharkd_json_array_open("c");
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for (col = 0; col < cinfo->num_cols; ++col)
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{
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const col_item_t *col_item = &cinfo->columns[col];
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case DISSECT_REQUEST_NO_SUCH_FRAME:
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/* XXX - report the error. */
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break;
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sharkd_json_value_string(NULL, col_item->col_data);
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}
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sharkd_json_array_close();
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sharkd_json_value_anyf("num", "%u", framenum);
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if (fdata->has_modified_block || fdata->has_phdr_block)
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{
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if (!fdata->has_modified_block || sharkd_get_modified_block(fdata) != NULL)
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sharkd_json_value_anyf("ct", "true");
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case DISSECT_REQUEST_READ_ERROR:
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/*
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* Free up the error string.
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* XXX - report the error.
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*/
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g_free(err_info);
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break;
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}
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if (fdata->ignored)
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sharkd_json_value_anyf("i", "true");
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if (fdata->marked)
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sharkd_json_value_anyf("m", "true");
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if (fdata->color_filter)
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{
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sharkd_json_value_stringf("bg", "%x", color_t_to_rgb(&fdata->color_filter->bg_color));
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sharkd_json_value_stringf("fg", "%x", color_t_to_rgb(&fdata->color_filter->fg_color));
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}
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json_dumper_end_object(&dumper);
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prev_dis_num = framenum;
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if (limit && --limit == 0)
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@ -1472,6 +1553,9 @@ sharkd_session_process_frames(const char *buf, const jsmntok_t *tokens, int coun
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if (cinfo != &cfile.cinfo)
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col_cleanup(cinfo);
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wtap_rec_cleanup(&rec);
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ws_buffer_free(&rec_buf);
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}
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static void
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@ -3371,7 +3455,7 @@ sharkd_session_process_frame_cb(epan_dissect_t *edt, proto_tree *tree, struct ep
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sharkd_json_array_open("comment");
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for (i = 0; i < n; i++) {
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if (WTAP_OPTTYPE_SUCCESS == wtap_block_get_nth_string_option_value(pkt_block, OPT_COMMENT, i, &comment)) {
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sharkd_json_value_string(NULL, comment);
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sharkd_json_value_string(NULL, comment);
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}
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}
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sharkd_json_array_close();
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@ -3757,7 +3841,6 @@ sharkd_session_process_intervals(char *buf, const jsmntok_t *tokens, int count)
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|||
|
||||
guint32 interval_ms = 1000; /* default: one per second */
|
||||
|
||||
unsigned int framenum;
|
||||
gint64 idx;
|
||||
gint64 max_idx = 0;
|
||||
|
||||
|
|
@ -3793,7 +3876,7 @@ sharkd_session_process_intervals(char *buf, const jsmntok_t *tokens, int count)
|
|||
|
||||
start_ts = (cfile.count >= 1) ? &(sharkd_get_frame(1)->abs_ts) : NULL;
|
||||
|
||||
for (framenum = 1; framenum <= cfile.count; framenum++)
|
||||
for (guint32 framenum = 1; framenum <= cfile.count; framenum++)
|
||||
{
|
||||
frame_data *fdata;
|
||||
gint64 msec_rel;
|
||||
|
|
@ -3893,10 +3976,16 @@ sharkd_session_process_frame(char *buf, const jsmntok_t *tokens, int count)
|
|||
const char *tok_frame = json_find_attr(buf, tokens, count, "frame");
|
||||
const char *tok_ref_frame = json_find_attr(buf, tokens, count, "ref_frame");
|
||||
const char *tok_prev_frame = json_find_attr(buf, tokens, count, "prev_frame");
|
||||
column_info *cinfo = NULL;
|
||||
|
||||
guint32 framenum, ref_frame_num, prev_dis_num;
|
||||
guint32 dissect_flags = SHARKD_DISSECT_FLAG_NULL;
|
||||
struct sharkd_frame_request_data req_data;
|
||||
wtap_rec rec; /* Record metadata */
|
||||
Buffer rec_buf; /* Record data */
|
||||
enum dissect_request_status status;
|
||||
int err;
|
||||
gchar *err_info;
|
||||
|
||||
ws_strtou32(tok_frame, NULL, &framenum); // we have already validated this
|
||||
|
||||
|
|
@ -3932,21 +4021,46 @@ sharkd_session_process_frame(char *buf, const jsmntok_t *tokens, int count)
|
|||
dissect_flags |= SHARKD_DISSECT_FLAG_PROTO_TREE;
|
||||
if (json_find_attr(buf, tokens, count, "bytes") != NULL)
|
||||
dissect_flags |= SHARKD_DISSECT_FLAG_BYTES;
|
||||
if (json_find_attr(buf, tokens, count, "columns") != NULL)
|
||||
if (json_find_attr(buf, tokens, count, "columns") != NULL) {
|
||||
dissect_flags |= SHARKD_DISSECT_FLAG_COLUMNS;
|
||||
cinfo = &cfile.cinfo;
|
||||
}
|
||||
if (json_find_attr(buf, tokens, count, "color") != NULL)
|
||||
dissect_flags |= SHARKD_DISSECT_FLAG_COLOR;
|
||||
|
||||
req_data.display_hidden = (json_find_attr(buf, tokens, count, "v") != NULL);
|
||||
|
||||
if (sharkd_dissect_request(framenum, ref_frame_num, prev_dis_num, &sharkd_session_process_frame_cb, dissect_flags, &req_data))
|
||||
{
|
||||
wtap_rec_init(&rec);
|
||||
ws_buffer_init(&rec_buf, 1514);
|
||||
|
||||
status = sharkd_dissect_request(framenum, ref_frame_num, prev_dis_num,
|
||||
&rec, &rec_buf, cinfo, dissect_flags,
|
||||
&sharkd_session_process_frame_cb, &req_data, &err, &err_info);
|
||||
switch (status) {
|
||||
|
||||
case DISSECT_REQUEST_SUCCESS:
|
||||
/* success */
|
||||
break;
|
||||
|
||||
case DISSECT_REQUEST_NO_SUCH_FRAME:
|
||||
sharkd_json_error(
|
||||
rpcid, -8003, NULL,
|
||||
"Invalid frame - The frame number requested is out of range"
|
||||
);
|
||||
return;
|
||||
break;
|
||||
|
||||
case DISSECT_REQUEST_READ_ERROR:
|
||||
sharkd_json_error(
|
||||
rpcid, -8003, NULL,
|
||||
/* XXX - show the error details */
|
||||
"Read error - The frame could not be read from the file"
|
||||
);
|
||||
g_free(err_info);
|
||||
break;
|
||||
}
|
||||
|
||||
wtap_rec_cleanup(&rec);
|
||||
ws_buffer_free(&rec_buf);
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -4244,7 +4358,6 @@ sharkd_session_process_setcomment(char *buf, const jsmntok_t *tokens, int count)
|
|||
sharkd_set_modified_block(fdata, pkt_block);
|
||||
sharkd_json_simple_ok(rpcid);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
|
|||
Loading…
Reference in New Issue