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-rw-r--r--disabled_protos.c350
1 files changed, 350 insertions, 0 deletions
diff --git a/disabled_protos.c b/disabled_protos.c
new file mode 100644
index 0000000000..45b35e9ba7
--- /dev/null
+++ b/disabled_protos.c
@@ -0,0 +1,350 @@
+/* disabled_protos.c
+ * Code for reading and writing the disabled protocols file.
+ *
+ * $Id: disabled_protos.c,v 1.1 2003/08/07 00:41:26 guy Exp $
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@ethereal.com>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include <glib.h>
+
+#include <epan/filesystem.h>
+#include <epan/proto.h>
+
+#include "disabled_protos.h"
+
+#define PROTOCOLS_FILE_NAME "disabled_protos"
+
+/*
+ * List of disabled protocols
+ */
+static GList *disabled_protos = NULL;
+
+#define INIT_BUF_SIZE 128
+
+/*
+ * Read in a list of disabled protocols.
+ *
+ * On success, "*pref_path_return" is set to NULL.
+ * On error, "*pref_path_return" is set to point to the pathname of
+ * the file we tried to read - it should be freed by our caller -
+ * and "*open_errno_return" is set to the error if an open failed
+ * or "*read_errno_return" is set to the error if a read failed.
+ */
+
+void
+read_disabled_protos_list(char **pref_path_return, int *open_errno_return,
+ int *read_errno_return)
+{
+ char *ff_path, *ff_name;
+ FILE *ff;
+ GList **flp;
+ GList *fl_ent;
+ protocol_def *prot;
+ int c;
+ char *prot_name;
+ int prot_name_len;
+ int prot_name_index;
+ int line = 1;
+
+ *pref_path_return = NULL; /* assume no error */
+
+ ff_name = PROTOCOLS_FILE_NAME;
+ flp = &disabled_protos;
+
+ /* To do: generalize this */
+ ff_path = get_persconffile_path(ff_name, FALSE);
+ if ((ff = fopen(ff_path, "r")) == NULL) {
+ /*
+ * Did that fail because we the file didn't exist?
+ */
+ if (errno != ENOENT) {
+ /*
+ * No. Just give up.
+ */
+ *pref_path_return = ff_path;
+ *open_errno_return = errno;
+ *read_errno_return = 0;
+ return;
+ }
+
+ /*
+ * Yes. See if there's a "protocols" file; if so, read it.
+ */
+ g_free(ff_path);
+ ff_path = get_persconffile_path(PROTOCOLS_FILE_NAME, FALSE);
+ if ((ff = fopen(ff_path, "r")) == NULL) {
+ /*
+ * Well, that didn't work, either. Just give up.
+ * Return an error if the file existed but we couldn't open it.
+ */
+ if (errno != ENOENT) {
+ *pref_path_return = ff_path;
+ *open_errno_return = errno;
+ *read_errno_return = 0;
+ }
+ return;
+ }
+ }
+
+ /* If we already have a list of protocols, discard it. */
+ if (*flp != NULL) {
+ fl_ent = g_list_first(*flp);
+ while (fl_ent != NULL) {
+ prot = (protocol_def *) fl_ent->data;
+ g_free(prot->name);
+ g_free(prot);
+ fl_ent = fl_ent->next;
+ }
+ g_list_free(*flp);
+ *flp = NULL;
+ }
+
+ /* Allocate the protocol name buffer. */
+ prot_name_len = INIT_BUF_SIZE;
+ prot_name = g_malloc(prot_name_len + 1);
+
+ for (line = 1; ; line++) {
+ /* Lines in a disabled protocol file contain the "filter name" of
+ a protocol to be disabled. */
+
+ /* Skip over leading white space, if any. */
+ while ((c = getc(ff)) != EOF && isspace(c)) {
+ if (c == '\n') {
+ /* Blank line. */
+ continue;
+ }
+ }
+
+ if (c == EOF) {
+ if (ferror(ff))
+ goto error; /* I/O error */
+ else
+ break; /* Nothing more to read */
+ }
+ ungetc(c, ff); /* Unread the non-white-space character. */
+
+ /* Get the name of the protocol. */
+ prot_name_index = 0;
+ for (;;) {
+ c = getc(ff);
+ if (c == EOF)
+ break; /* End of file, or I/O error */
+ if (isspace(c))
+ break; /* Trailing white space, or end of line. */
+ if (c == '#')
+ break; /* Start of comment, running to end of line. */
+ /* Add this character to the protocol name string. */
+ if (prot_name_index >= prot_name_len) {
+ /* protocol name buffer isn't long enough; double its length. */
+ prot_name_len *= 2;
+ prot_name = g_realloc(prot_name, prot_name_len + 1);
+ }
+ prot_name[prot_name_index] = c;
+ prot_name_index++;
+ }
+
+ if (isspace(c) && c != '\n') {
+ /* Skip over trailing white space. */
+ while ((c = getc(ff)) != EOF && c != '\n' && isspace(c))
+ ;
+ if (c != EOF && c != '\n') {
+ /* Non-white-space after the protocol name; warn about it,
+ in case we come up with a reason to use it. */
+ g_warning("'%s' line %d has extra stuff after the protocol name.",
+ ff_path, line);
+
+ /* Skip to end of line. */
+ while ((c = getc(ff)) != EOF && c != '\n')
+ ;
+ }
+ } else if (c == '#') {
+ /* Comment - skip to end of line. */
+ while ((c = getc(ff)) != EOF && c != '\n')
+ ;
+ }
+
+ if (c == EOF) {
+ if (ferror(ff))
+ goto error; /* I/O error */
+ else {
+ /* EOF, not error; no newline seen before EOF */
+ g_warning("'%s' line %d doesn't have a newline.", ff_path,
+ line);
+ }
+ break; /* nothing more to read */
+ }
+
+ /* Null-terminate the protocol name. */
+ if (prot_name_index >= prot_name_len) {
+ /* protocol name buffer isn't long enough; double its length. */
+ prot_name_len *= 2;
+ prot_name = g_realloc(prot_name, prot_name_len + 1);
+ }
+ prot_name[prot_name_index] = '\0';
+
+ /* Add the new protocol to the list of disabled protocols */
+ prot = (protocol_def *) g_malloc(sizeof(protocol_def));
+ prot->name = g_strdup(prot_name);
+ *flp = g_list_append(*flp, prot);
+ }
+ g_free(ff_path);
+ fclose(ff);
+ g_free(prot_name);
+ return;
+
+error:
+ *pref_path_return = ff_path;
+ *open_errno_return = 0;
+ *read_errno_return = errno;
+ fclose(ff);
+}
+
+/*
+ * Disable protocols as per the stored configuration
+ */
+void
+set_disabled_protos_list(void)
+{
+ gint i;
+ GList *fl_ent;
+ protocol_def *prot;
+
+ /*
+ * assume all protocols are enabled by default
+ */
+ if (disabled_protos == NULL)
+ return; /* nothing to disable */
+
+ fl_ent = g_list_first(disabled_protos);
+
+ while (fl_ent != NULL) {
+ prot = (protocol_def *) fl_ent->data;
+ i = proto_get_id_by_filter_name(prot->name);
+ if (i == -1) {
+ /* XXX - complain here? */
+ } else {
+ if (proto_can_disable_protocol(i))
+ proto_set_decoding(i, FALSE);
+ }
+
+ fl_ent = fl_ent->next;
+ }
+}
+
+/*
+ * Write out a list of disabled protocols.
+ *
+ * On success, "*pref_path_return" is set to NULL.
+ * On error, "*pref_path_return" is set to point to the pathname of
+ * the file we tried to read - it should be freed by our caller -
+ * and "*errno_return" is set to the error.
+ */
+void
+save_disabled_protos_list(char **pref_path_return, int *errno_return)
+{
+ gchar *ff_path, *ff_path_new, *ff_name;
+ FILE *ff;
+ gint i;
+ void *cookie;
+
+ *pref_path_return = NULL; /* assume no error */
+
+ ff_name = PROTOCOLS_FILE_NAME;
+
+ ff_path = get_persconffile_path(ff_name, TRUE);
+
+ /* Write to "XXX.new", and rename if that succeeds.
+ That means we don't trash the file if we fail to write it out
+ completely. */
+ ff_path_new = (gchar *) g_malloc(strlen(ff_path) + 5);
+ sprintf(ff_path_new, "%s.new", ff_path);
+
+ if ((ff = fopen(ff_path_new, "w")) == NULL) {
+ *pref_path_return = ff_path;
+ *errno_return = errno;
+ g_free(ff_path_new);
+ return;
+ }
+
+ /* Iterate over all the protocols */
+
+ for (i = proto_get_first_protocol(&cookie); i != -1;
+ i = proto_get_next_protocol(&cookie)) {
+
+ if (!proto_can_disable_protocol(i)) {
+ continue;
+ }
+
+ if (proto_is_protocol_enabled(i)) {
+ continue;
+ }
+
+ /* Write out the protocol name. */
+ fprintf(ff, "%s\n", proto_get_protocol_filter_name(i));
+ }
+
+ if (fclose(ff) == EOF) {
+ *pref_path_return = ff_path;
+ *errno_return = errno;
+ unlink(ff_path_new);
+ g_free(ff_path_new);
+ return;
+ }
+
+#ifdef WIN32
+ /* ANSI C doesn't say whether "rename()" removes the target if it
+ exists; the Win32 call to rename files doesn't do so, which I
+ infer is the reason why the MSVC++ "rename()" doesn't do so.
+ We must therefore remove the target file first, on Windows. */
+ if (remove(ff_path) < 0 && errno != ENOENT) {
+ /* It failed for some reason other than "it's not there"; if
+ it's not there, we don't need to remove it, so we just
+ drive on. */
+ *pref_path_return = ff_path;
+ *errno_return = errno;
+ unlink(ff_path_new);
+ g_free(ff_path_new);
+ return;
+ }
+#endif
+
+ if (rename(ff_path_new, ff_path) < 0) {
+ *pref_path_return = ff_path;
+ *errno_return = errno;
+ unlink(ff_path_new);
+ g_free(ff_path_new);
+ return;
+ }
+ g_free(ff_path_new);
+ g_free(ff_path);
+}
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