is a byte-swapped version of that.
PCAP_NSEC_MAGIC is for Ulf Lamping's modified "libpcap" format,
- which uses the same common file format as PCAP_MAGIC, but the
+ which uses the same common file format as PCAP_MAGIC, but the
timestamps are saved in nanosecond resolution instead of microseconds.
PCAP_SWAPPED_NSEC_MAGIC is a byte-swapped version of that. */
#define PCAP_MAGIC 0xa1b2c3d4
} else { \
*error_pointer = 0; \
} \
- fclose(file_pointer); \
return FALSE; \
} \
- written_length += nwritten; \
+ written_length += (long)nwritten; \
} while (0); \
}
gboolean
libpcap_write_session_header_block(FILE *fp,
- char *appname,
+ const char *appname,
long *bytes_written,
int *err)
{
struct option option;
guint32 block_total_length;
const guint32 padding = 0;
-
+
block_total_length = sizeof(struct shb) +
- sizeof(struct option) + ADD_PADDING(strlen(appname) + 1) +
- sizeof(struct option) +
sizeof(guint32);
+ if ((strlen(appname) > 0) && (strlen(appname) < G_MAXUINT16)) {
+ block_total_length += 2 * sizeof(struct option) +
+ (guint16)(ADD_PADDING(strlen(appname) + 1));
+ }
/* write shb header */
shb.block_type = SECTION_HEADER_BLOCK_TYPE;
shb.block_total_length = block_total_length;
shb.minor_version = PCAPNG_MINOR_VERSION;
shb.section_length = -1;
WRITE_DATA(fp, &shb, sizeof(struct shb), *bytes_written, err);
- /* write shb_userappl options */
- option.type = SHB_USERAPPL;
- option.value_length = strlen(appname) + 1;
- WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
- WRITE_DATA(fp, appname, strlen(appname) + 1, *bytes_written, err);
- if ((strlen(appname) + 1) % 4) {
- WRITE_DATA(fp, &padding, 4 - (strlen(appname) + 1) % 4, *bytes_written, err);
+
+ if ((strlen(appname) > 0) && (strlen(appname) < G_MAXUINT16)) {
+ /* write shb_userappl options */
+ option.type = SHB_USERAPPL;
+ option.value_length = (guint16)(strlen(appname) + 1);
+ WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
+ WRITE_DATA(fp, appname, strlen(appname) + 1, *bytes_written, err);
+ if ((strlen(appname) + 1) % 4) {
+ WRITE_DATA(fp, &padding, 4 - (strlen(appname) + 1) % 4, *bytes_written, err);
+ }
+ /* write last option */
+ option.type = OPT_ENDOFOPT;
+ option.value_length = 0;
+ WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
}
- /* write last option */
- option.type = OPT_ENDOFOPT;
- option.value_length = 0;
- WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
/* write the trailing block total length */
WRITE_DATA(fp, &block_total_length, sizeof(guint32), *bytes_written, err);
return TRUE;
gboolean
libpcap_write_interface_description_block(FILE *fp,
- char *name,
- char *filter,
+ const char *name,
+ const char *filter,
int link_type,
int snap_len,
long *bytes_written,
const guint32 padding = 0;
block_total_length = sizeof(struct idb) + sizeof(guint32);
- if (strlen(name) > 0) {
- block_total_length += sizeof(struct option) + ADD_PADDING(strlen(name) + 1);
+ if ((strlen(name) > 0) && (strlen(name) < G_MAXUINT16)) {
+ block_total_length += sizeof(struct option) +
+ (guint16)(ADD_PADDING(strlen(name) + 1));
}
- if (strlen(filter) > 0) {
- block_total_length += sizeof(struct option) + ADD_PADDING(strlen(filter) + 1);
+ if ((strlen(filter) > 0) && (strlen(filter) < G_MAXUINT16)) {
+ block_total_length += sizeof(struct option) +
+ (guint16)(ADD_PADDING(strlen(filter) + 1));
}
- if ((strlen(name) > 0) || (strlen(filter) > 0)) {
+ if (((strlen(name) > 0) && (strlen(name) < G_MAXUINT16)) ||
+ ((strlen(filter) > 0) && (strlen(filter) < G_MAXUINT16))) {
block_total_length += sizeof(struct option);
}
+ /* write block header */
idb.block_type = INTERFACE_DESCRIPTION_BLOCK_TYPE;
idb.block_total_length = block_total_length;
idb.link_type = link_type;
idb.reserved = 0;
idb.snap_len = snap_len;
WRITE_DATA(fp, &idb, sizeof(struct idb), *bytes_written, err);
- /* write the options */
- if (strlen(name) > 0) {
+ /* write interface name string if applicable */
+ if ((strlen(name) > 0) && (strlen(name) < G_MAXUINT16)) {
option.type = IDB_NAME;
- option.value_length = strlen(name) + 1;
+ option.value_length = (guint16)(strlen(name) + 1);
WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
WRITE_DATA(fp, name, strlen(name) + 1, *bytes_written, err);
if ((strlen(name) + 1) % 4) {
WRITE_DATA(fp, &padding, 4 - (strlen(name) + 1) % 4 , *bytes_written, err);
}
}
- if (strlen(filter) > 0) {
+ /* write filter string if applicable */
+ if ((strlen(filter) > 0) && (strlen(filter) < G_MAXUINT16)) {
option.type = IDB_FILTER;
- option.value_length = strlen(filter) + 1;
+ option.value_length = (guint16)(strlen(filter) + 1);
WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
WRITE_DATA(fp, filter, strlen(filter) + 1, *bytes_written, err);
if ((strlen(filter) + 1) % 4) {
WRITE_DATA(fp, &padding, 4 - (strlen(filter) + 1) % 4 , *bytes_written, err);
}
}
- if ((strlen(name) > 0) || (strlen(filter) > 0)) {
+ /* write endofopt option if there were any options */
+ if (((strlen(name) > 0) && (strlen(name) < G_MAXUINT16)) ||
+ ((strlen(filter) > 0) && (strlen(filter) < G_MAXUINT16))) {
option.type = OPT_ENDOFOPT;
option.value_length = 0;
WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
int *err)
{
struct isb isb;
-#ifndef _WIN32
+#ifdef _WIN32
+ FILETIME now;
+#else
struct timeval now;
#endif
struct option option;
guint64 timestamp;
guint64 counter;
gboolean stats_retrieved;
-
+
#ifdef _WIN32
- timestamp = 0; /* FIXME */
+ /*
+ * Current time, represented as 100-nanosecond intervals since
+ * January 1, 1601, 00:00:00 UTC.
+ *
+ * I think DWORD might be signed, so cast both parts of "now"
+ * to guint32 so that the sign bit doesn't get treated specially.
+ */
+ GetSystemTimeAsFileTime(&now);
+ timestamp = (((guint64)(guint32)now.dwHighDateTime) << 32) +
+ (guint32)now.dwLowDateTime;
+
+ /*
+ * Convert to same thing but as 1-microsecond, i.e. 1000-nanosecond,
+ * intervals.
+ */
+ timestamp /= 10;
+
+ /*
+ * Subtract difference, in microseconds, between January 1, 1601
+ * 00:00:00 UTC and January 1, 1970, 00:00:00 UTC.
+ */
+ timestamp -= G_GINT64_CONSTANT(11644473600000000U);
#else
+ /*
+ * Current time, represented as seconds and microseconds since
+ * January 1, 1970, 00:00:00 UTC.
+ */
gettimeofday(&now, NULL);
+
+ /*
+ * Convert to delta in microseconds.
+ */
timestamp = (guint64)(now.tv_sec) * 1000000 +
(guint64)(now.tv_usec);
#endif
WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
}
WRITE_DATA(fp, &block_total_length, sizeof(guint32), *bytes_written, err);
-
+
return TRUE;
}
git.samba.org / obnox / wireshark / wip.git / blobdiff