forked from osmocom/wireshark
169 lines
4.4 KiB
C
169 lines
4.4 KiB
C
/* eri_enb_log.c
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*
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* Ericsson eNode-B raw log file format decoder for the Wiretap library.
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*
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* Wiretap Library
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "eri_enb_log.h"
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#include <string.h>
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#include "file_wrappers.h"
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#include "wtap-int.h"
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static const char eri_enb_log_magic[] = "com_ericsson";
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static int eri_enb_log_file_type_subtype = -1;
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void register_eri_enb_log(void);
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#define MAX_LINE_LENGTH 131072
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static gboolean eri_enb_log_get_packet(FILE_T fh, wtap_rec* rec,
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Buffer* buf, int* err _U_, gchar** err_info _U_)
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{
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static char line[MAX_LINE_LENGTH];
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/* Read in a line */
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gint64 pos_before = file_tell(fh);
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while (file_gets(line, sizeof(line), fh) != NULL)
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{
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nstime_t packet_time;
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gint length;
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/* Set length (avoiding strlen()) and offset.. */
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length = (gint)(file_tell(fh) - pos_before);
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/* ...but don't want to include newline in line length */
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if (length > 0 && line[length - 1] == '\n') {
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line[length - 1] = '\0';
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length = length - 1;
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}
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/* Nor do we want '\r' (as will be written when log is created on windows) */
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if (length > 0 && line[length - 1] == '\r') {
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line[length - 1] = '\0';
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length = length - 1;
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}
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if (0 < iso8601_to_nstime(&packet_time, line+1, ISO8601_DATETIME)) {
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rec->ts.secs = packet_time.secs;
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rec->ts.nsecs = packet_time.nsecs;
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rec->presence_flags |= WTAP_HAS_TS;
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} else {
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rec->ts.secs = 0;
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rec->ts.nsecs = 0;
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rec->presence_flags = 0; /* no time stamp, no separate "on the wire" length */
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}
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/* We've got a full packet! */
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rec->rec_type = REC_TYPE_PACKET;
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rec->block = wtap_block_create(WTAP_BLOCK_PACKET);
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rec->rec_header.packet_header.caplen = length;
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rec->rec_header.packet_header.len = length;
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*err = 0;
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/* Make sure we have enough room for the packet */
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ws_buffer_assure_space(buf, rec->rec_header.packet_header.caplen);
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memcpy(ws_buffer_start_ptr(buf), line, rec->rec_header.packet_header.caplen);
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return TRUE;
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}
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return FALSE;
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}
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/* Find the next packet and parse it; called from wtap_read(). */
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static gboolean eri_enb_log_read(wtap* wth, wtap_rec* rec, Buffer* buf,
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int* err, gchar** err_info, gint64* data_offset)
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{
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*data_offset = file_tell(wth->fh);
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return eri_enb_log_get_packet(wth->fh, rec, buf, err, err_info);
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}
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/* Used to read packets in random-access fashion */
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static gboolean eri_enb_log_seek_read(wtap* wth, gint64 seek_off,
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wtap_rec* rec, Buffer* buf, int* err, gchar** err_info)
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{
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if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
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{
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return FALSE;
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}
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return eri_enb_log_get_packet(wth->random_fh, rec, buf, err, err_info);
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}
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wtap_open_return_val
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eri_enb_log_open(wtap *wth, int *err, gchar **err_info)
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{
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char line1[64];
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/* Look for Gammu DCT3 trace header */
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if (file_gets(line1, sizeof(line1), wth->fh) == NULL)
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{
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*err = file_error(wth->fh, err_info);
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if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
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return WTAP_OPEN_ERROR;
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return WTAP_OPEN_NOT_MINE;
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}
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if (g_strstr_len(line1, sizeof(line1), eri_enb_log_magic) == NULL)
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{
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return WTAP_OPEN_NOT_MINE;
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}
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if (file_seek(wth->fh, 0, SEEK_SET, err) == -1)
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return WTAP_OPEN_ERROR;
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wth->file_type_subtype = eri_enb_log_file_type_subtype;
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wth->file_encap = WTAP_ENCAP_ERI_ENB_LOG;
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wth->file_tsprec = WTAP_TSPREC_NSEC;
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wth->subtype_read = eri_enb_log_read;
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wth->subtype_seek_read = eri_enb_log_seek_read;
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wth->snapshot_length = 0;
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return WTAP_OPEN_MINE;
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}
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static const struct supported_block_type eri_enb_log_blocks_supported[] = {
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/*
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* This is a file format that we dissect, so we provide
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* only one "packet" with the file's contents, and don't
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* support any options.
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*/
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{ WTAP_BLOCK_PACKET, MULTIPLE_BLOCKS_SUPPORTED, NO_OPTIONS_SUPPORTED }
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};
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static const struct file_type_subtype_info eri_enb_log_info = {
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"Ericsson eNode-B raw log", "eri_enb_log", "eri_enb_log", NULL,
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FALSE, BLOCKS_SUPPORTED(eri_enb_log_blocks_supported),
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NULL, NULL, NULL
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};
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void register_eri_enb_log(void)
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{
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eri_enb_log_file_type_subtype = wtap_register_file_type_subtype(&eri_enb_log_info);
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/*
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* Register name for backwards compatibility with the
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* wtap_filetypes table in Lua.
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*/
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//wtap_register_backwards_compatibility_lua_name("MP4",
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// eri_enb_log_file_type_subtype);
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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