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-rw-r--r--pcapio.c304
1 files changed, 156 insertions, 148 deletions
diff --git a/pcapio.c b/pcapio.c
index 6f7d600acc..021b0f4a43 100644
--- a/pcapio.c
+++ b/pcapio.c
@@ -376,159 +376,167 @@ libpcap_write_session_header_block(FILE *fp,
gboolean
libpcap_write_interface_description_block(FILE *fp,
- const char *comment, /* OPT_COMMENT 1 */
- const char *name, /* IDB_NAME 2 */
- const char *descr, /* IDB_DESCRIPTION 3 */
- const char *filter, /* IDB_FILTER 11 */
- const char *os, /* IDB_OS 12 */
+ const char *comment, /* OPT_COMMENT 1 */
+ const char *name, /* IDB_NAME 2 */
+ const char *descr, /* IDB_DESCRIPTION 3 */
+ const char *filter, /* IDB_FILTER 11 */
+ const char *os, /* IDB_OS 12 */
int link_type,
int snap_len,
long *bytes_written,
- guint64 if_speed, /* IDB_IF_SPEED 8 */
- guint8 tsresol, /* IDB_TSRESOL 9 */
+ guint64 if_speed, /* IDB_IF_SPEED 8 */
+ guint8 tsresol, /* IDB_TSRESOL 9 */
int *err)
{
- struct idb idb;
- struct option option;
- guint32 block_total_length;
- const guint32 padding = 0;
- gboolean have_options = FALSE;
-
- block_total_length = sizeof(struct idb) + sizeof(guint32);
- /* OPT_COMMENT */
- if ((comment)&&(strlen(comment) > 0) && (strlen(comment) < G_MAXUINT16)) {
- block_total_length += sizeof(struct option) +
- (guint16)(ADD_PADDING(strlen(comment) + 1));
- have_options = TRUE;
- }
-
- /* IDB_DESCRIPTION */
- if ((descr)&&(strlen(descr) > 0) && (strlen(descr) < G_MAXUINT16)) {
- block_total_length += sizeof(struct option) +
- (guint16)(ADD_PADDING(strlen(descr) + 1));
- have_options = TRUE;
- }
-
- /* IDB_NAME */
- if ((name)&&(strlen(name) > 0) && (strlen(name) < G_MAXUINT16)) {
- block_total_length += sizeof(struct option) +
- (guint16)(ADD_PADDING(strlen(name) + 1));
- have_options = TRUE;
- }
-
- /* IDB_FILTER */
- if ((filter)&&(strlen(filter) > 0) && (strlen(filter) < G_MAXUINT16)) {
- block_total_length += sizeof(struct option) +
- (guint16)(ADD_PADDING(strlen(filter) + 1));
- have_options = TRUE;
- }
-
- /* IDB_OS */
- if ((os)&&(strlen(os) > 0) && (strlen(os) < G_MAXUINT16)) {
- block_total_length += sizeof(struct option) +
- (guint16)(ADD_PADDING(strlen(os) + 1));
- have_options = TRUE;
- }
-
- /* IDB_IF_SPEED 8 */
- if(if_speed != 0){
- block_total_length += sizeof(struct option) + sizeof(guint64);
- have_options = TRUE;
- }
- /* IDB_TSRESOL 9 */
- if(tsresol != 0){
- block_total_length += sizeof(struct option) + sizeof(struct option);
- have_options = TRUE;
- }
- /* If we have options add size of end-of-options */
- if(have_options){
- 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 comment string if applicable */
- if ((comment)&&(strlen(comment) > 0) && (strlen(comment) < G_MAXUINT16)) {
- option.type = OPT_COMMENT;
- option.value_length = (guint16)(strlen(comment) + 1);
- WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
- WRITE_DATA(fp, comment, strlen(comment) + 1, *bytes_written, err);
- if ((strlen(comment) + 1) % 4) {
- WRITE_DATA(fp, &padding, 4 - (strlen(comment) + 1) % 4 , *bytes_written, err);
- }
- }
- /* write interface name string if applicable */
- if ((name)&&(strlen(name) > 0) && (strlen(name) < G_MAXUINT16)) {
- option.type = IDB_NAME;
- 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);
- }
- }
- /* write interface description string if applicable */
- if ((descr)&&(strlen(descr) > 0) && (strlen(descr) < G_MAXUINT16)) {
- option.type = IDB_DESCRIPTION;
- option.value_length = (guint16)(strlen(descr) + 1);
- WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
- WRITE_DATA(fp, name, strlen(descr) + 1, *bytes_written, err);
- if ((strlen(descr) + 1) % 4) {
- WRITE_DATA(fp, &padding, 4 - (strlen(descr) + 1) % 4 , *bytes_written, err);
- }
- }
- /* write filter string if applicable */
- if ((filter)&&(strlen(filter) > 0) && (strlen(filter) < G_MAXUINT16)) {
- option.type = IDB_FILTER;
- 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);
- }
- }
-
- /* write os string if applicable */
- if ((os)&&(strlen(os) > 0) && (strlen(os) < G_MAXUINT16)) {
- option.type = IDB_OS;
- option.value_length = (guint16)(strlen(filter) + 1);
- WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
- WRITE_DATA(fp, filter, strlen(os) + 1, *bytes_written, err);
- if ((strlen(os) + 1) % 4) {
- WRITE_DATA(fp, &padding, 4 - (strlen(os) + 1) % 4 , *bytes_written, err);
- }
- }
-
-
- /* IDB_IF_SPEED 8 */
- if(if_speed != 0){
- option.type = IDB_IF_SPEED;
- option.value_length = sizeof(guint64);
- WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
- WRITE_DATA(fp, &if_speed, sizeof(guint64), *bytes_written, err);
- }
- /* IDB_TSRESOL 9 */
- if(tsresol != 0){
- option.type = IDB_TSRESOL;
- option.value_length = sizeof(guint8);
- WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
- WRITE_DATA(fp, &if_speed, sizeof(guint8), *bytes_written, err);
- WRITE_DATA(fp, &padding, 3 , *bytes_written, err);
- }
-
- if(have_options){
- /* write end of options */
- 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;
+ struct idb idb;
+ struct option option;
+ guint32 block_total_length;
+ const guint32 padding = 0;
+ gboolean have_options = FALSE;
+
+ block_total_length = sizeof(struct idb) + sizeof(guint32);
+ /* OPT_COMMENT */
+ if ((comment != NULL) && (strlen(comment) > 0) && (strlen(comment) < G_MAXUINT16)) {
+ block_total_length += sizeof(struct option) +
+ (guint16)(ADD_PADDING(strlen(comment) + 1));
+ have_options = TRUE;
+ }
+
+ /* IDB_DESCRIPTION */
+ if ((descr != NULL) && (strlen(descr) > 0) && (strlen(descr) < G_MAXUINT16)) {
+ block_total_length += sizeof(struct option) +
+ (guint16)(ADD_PADDING(strlen(descr) + 1));
+ have_options = TRUE;
+ }
+
+ /* IDB_NAME */
+ if ((name != NULL) && (strlen(name) > 0) && (strlen(name) < G_MAXUINT16)) {
+ block_total_length += sizeof(struct option) +
+ (guint16)(ADD_PADDING(strlen(name) + 1));
+ have_options = TRUE;
+ }
+
+ /* IDB_FILTER */
+ if ((filter != NULL) && (strlen(filter) > 0) && (strlen(filter) < G_MAXUINT16)) {
+ block_total_length += sizeof(struct option) +
+ (guint16)(ADD_PADDING(strlen(filter) + 1));
+ have_options = TRUE;
+ }
+
+ /* IDB_OS */
+ if ((os != NULL) && (strlen(os) > 0) && (strlen(os) < G_MAXUINT16)) {
+ block_total_length += sizeof(struct option) +
+ (guint16)(ADD_PADDING(strlen(os) + 1));
+ have_options = TRUE;
+ }
+
+ /* IDB_IF_SPEED 8 */
+ if (if_speed != 0) {
+ block_total_length += sizeof(struct option) + sizeof(guint64);
+ have_options = TRUE;
+ }
+
+ /* IDB_TSRESOL 9 */
+ if (tsresol != 0) {
+ block_total_length += sizeof(struct option) + sizeof(struct option);
+ have_options = TRUE;
+ }
+
+ /* If we have options add size of end-of-options */
+ if (have_options) {
+ 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 comment string if applicable */
+ if ((comment != NULL) && (strlen(comment) > 0) && (strlen(comment) < G_MAXUINT16)) {
+ option.type = OPT_COMMENT;
+ option.value_length = (guint16)(strlen(comment) + 1);
+ WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
+ WRITE_DATA(fp, comment, strlen(comment) + 1, *bytes_written, err);
+ if ((strlen(comment) + 1) % 4) {
+ WRITE_DATA(fp, &padding, 4 - (strlen(comment) + 1) % 4 , *bytes_written, err);
+ }
+ }
+
+ /* write interface name string if applicable */
+ if ((name != NULL) && (strlen(name) > 0) && (strlen(name) < G_MAXUINT16)) {
+ option.type = IDB_NAME;
+ 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);
+ }
+ }
+
+ /* write interface description string if applicable */
+ if ((descr != NULL) && (strlen(descr) > 0) && (strlen(descr) < G_MAXUINT16)) {
+ option.type = IDB_DESCRIPTION;
+ option.value_length = (guint16)(strlen(descr) + 1);
+ WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
+ WRITE_DATA(fp, name, strlen(descr) + 1, *bytes_written, err);
+ if ((strlen(descr) + 1) % 4) {
+ WRITE_DATA(fp, &padding, 4 - (strlen(descr) + 1) % 4 , *bytes_written, err);
+ }
+ }
+
+ /* write filter string if applicable */
+ if ((filter != NULL) && (strlen(filter) > 0) && (strlen(filter) < G_MAXUINT16)) {
+ option.type = IDB_FILTER;
+ 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);
+ }
+ }
+
+ /* write os string if applicable */
+ if ((os != NULL) && (strlen(os) > 0) && (strlen(os) < G_MAXUINT16)) {
+ option.type = IDB_OS;
+ option.value_length = (guint16)(strlen(filter) + 1);
+ WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
+ WRITE_DATA(fp, filter, strlen(os) + 1, *bytes_written, err);
+ if ((strlen(os) + 1) % 4) {
+ WRITE_DATA(fp, &padding, 4 - (strlen(os) + 1) % 4 , *bytes_written, err);
+ }
+ }
+
+ /* IDB_IF_SPEED 8 */
+ if (if_speed != 0) {
+ option.type = IDB_IF_SPEED;
+ option.value_length = sizeof(guint64);
+ WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
+ WRITE_DATA(fp, &if_speed, sizeof(guint64), *bytes_written, err);
+ }
+
+ /* IDB_TSRESOL 9 */
+ if (tsresol != 0) {
+ option.type = IDB_TSRESOL;
+ option.value_length = sizeof(guint8);
+ WRITE_DATA(fp, &option, sizeof(struct option), *bytes_written, err);
+ WRITE_DATA(fp, &if_speed, sizeof(guint8), *bytes_written, err);
+ WRITE_DATA(fp, &padding, 3 , *bytes_written, err);
+ }
+
+ if (have_options) {
+ /* write end of options */
+ 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;
}
/* Write a record for a packet to a dump file.
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-24 17:38:02 +0000