539 lines
18 KiB
C
539 lines
18 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2013 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "util.h"
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#include "capability.h"
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#include "strv.h"
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#include "audit.h"
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#include "macro.h"
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#include "bus-message.h"
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#include "bus-internal.h"
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#include "bus-type.h"
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#include "bus-dump.h"
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static char *indent(unsigned level, unsigned flags) {
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char *p;
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unsigned n, i = 0;
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n = 0;
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if (flags & BUS_MESSAGE_DUMP_SUBTREE_ONLY && level > 0)
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level -= 1;
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if (flags & BUS_MESSAGE_DUMP_WITH_HEADER)
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n += 2;
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p = new(char, n + level*8 + 1);
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if (!p)
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return NULL;
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if (flags & BUS_MESSAGE_DUMP_WITH_HEADER) {
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p[i++] = ' ';
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p[i++] = ' ';
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}
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memset(p + i, ' ', level*8);
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p[i + level*8] = 0;
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return p;
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}
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int bus_message_dump(sd_bus_message *m, FILE *f, unsigned flags) {
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unsigned level = 1;
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int r;
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assert(m);
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if (!f)
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f = stdout;
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if (flags & BUS_MESSAGE_DUMP_WITH_HEADER) {
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fprintf(f,
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"%s%s%s Type=%s%s%s Endian=%c Flags=%u Version=%u Priority=%lli",
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m->header->type == SD_BUS_MESSAGE_METHOD_ERROR ? ansi_highlight_red() :
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m->header->type == SD_BUS_MESSAGE_METHOD_RETURN ? ansi_highlight_green() :
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m->header->type != SD_BUS_MESSAGE_SIGNAL ? ansi_highlight() : "", draw_special_char(DRAW_TRIANGULAR_BULLET), ansi_highlight_off(),
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ansi_highlight(), bus_message_type_to_string(m->header->type), ansi_highlight_off(),
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m->header->endian,
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m->header->flags,
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m->header->version,
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(long long) m->priority);
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/* Display synthetic message serial number in a more readable
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* format than (uint32_t) -1 */
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if (BUS_MESSAGE_COOKIE(m) == 0xFFFFFFFFULL)
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fprintf(f, " Cookie=-1");
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else
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fprintf(f, " Cookie=%" PRIu64, BUS_MESSAGE_COOKIE(m));
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if (m->reply_cookie != 0)
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fprintf(f, " ReplyCookie=%" PRIu64, m->reply_cookie);
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fputs("\n", f);
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if (m->sender)
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fprintf(f, " Sender=%s%s%s", ansi_highlight(), m->sender, ansi_highlight_off());
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if (m->destination)
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fprintf(f, " Destination=%s%s%s", ansi_highlight(), m->destination, ansi_highlight_off());
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if (m->path)
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fprintf(f, " Path=%s%s%s", ansi_highlight(), m->path, ansi_highlight_off());
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if (m->interface)
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fprintf(f, " Interface=%s%s%s", ansi_highlight(), m->interface, ansi_highlight_off());
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if (m->member)
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fprintf(f, " Member=%s%s%s", ansi_highlight(), m->member, ansi_highlight_off());
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if (m->sender || m->destination || m->path || m->interface || m->member)
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fputs("\n", f);
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if (sd_bus_error_is_set(&m->error))
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fprintf(f,
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" ErrorName=%s%s%s"
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" ErrorMessage=%s\"%s\"%s\n",
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ansi_highlight_red(), strna(m->error.name), ansi_highlight_off(),
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ansi_highlight_red(), strna(m->error.message), ansi_highlight_off());
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if (m->monotonic != 0)
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fprintf(f, " Monotonic="USEC_FMT, m->monotonic);
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if (m->realtime != 0)
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fprintf(f, " Realtime="USEC_FMT, m->realtime);
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if (m->seqnum != 0)
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fprintf(f, " SequenceNumber=%"PRIu64, m->seqnum);
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if (m->monotonic != 0 || m->realtime != 0 || m->seqnum != 0)
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fputs("\n", f);
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bus_creds_dump(&m->creds, f);
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}
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r = sd_bus_message_rewind(m, !(flags & BUS_MESSAGE_DUMP_SUBTREE_ONLY));
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if (r < 0) {
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log_error("Failed to rewind: %s", strerror(-r));
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return r;
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}
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if (!(flags & BUS_MESSAGE_DUMP_SUBTREE_ONLY))
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fprintf(f, "%sMESSAGE \"%s\" {\n", indent(0, flags), strempty(m->root_container.signature));
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for (;;) {
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_cleanup_free_ char *prefix = NULL;
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const char *contents = NULL;
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char type;
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union {
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uint8_t u8;
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uint16_t u16;
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int16_t s16;
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uint32_t u32;
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int32_t s32;
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uint64_t u64;
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int64_t s64;
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double d64;
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const char *string;
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int i;
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} basic;
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r = sd_bus_message_peek_type(m, &type, &contents);
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if (r < 0) {
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log_error("Failed to peek type: %s", strerror(-r));
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return r;
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}
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if (r == 0) {
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if (level <= 1)
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break;
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r = sd_bus_message_exit_container(m);
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if (r < 0) {
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log_error("Failed to exit container: %s", strerror(-r));
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return r;
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}
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level--;
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prefix = indent(level, flags);
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if (!prefix)
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return log_oom();
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fprintf(f, "%s};\n", prefix);
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continue;
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}
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prefix = indent(level, flags);
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if (!prefix)
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return log_oom();
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if (bus_type_is_container(type) > 0) {
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r = sd_bus_message_enter_container(m, type, contents);
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if (r < 0) {
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log_error("Failed to enter container: %s", strerror(-r));
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return r;
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}
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if (type == SD_BUS_TYPE_ARRAY)
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fprintf(f, "%sARRAY \"%s\" {\n", prefix, contents);
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else if (type == SD_BUS_TYPE_VARIANT)
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fprintf(f, "%sVARIANT \"%s\" {\n", prefix, contents);
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else if (type == SD_BUS_TYPE_STRUCT)
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fprintf(f, "%sSTRUCT \"%s\" {\n", prefix, contents);
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else if (type == SD_BUS_TYPE_DICT_ENTRY)
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fprintf(f, "%sDICT_ENTRY \"%s\" {\n", prefix, contents);
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level ++;
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continue;
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}
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r = sd_bus_message_read_basic(m, type, &basic);
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if (r < 0) {
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log_error("Failed to get basic: %s", strerror(-r));
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return r;
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}
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assert(r > 0);
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switch (type) {
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case SD_BUS_TYPE_BYTE:
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fprintf(f, "%sBYTE %s%u%s;\n", prefix, ansi_highlight(), basic.u8, ansi_highlight_off());
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break;
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case SD_BUS_TYPE_BOOLEAN:
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fprintf(f, "%sBOOLEAN %s%s%s;\n", prefix, ansi_highlight(), true_false(basic.i), ansi_highlight_off());
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break;
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case SD_BUS_TYPE_INT16:
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fprintf(f, "%sINT16 %s%i%s;\n", prefix, ansi_highlight(), basic.s16, ansi_highlight_off());
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break;
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case SD_BUS_TYPE_UINT16:
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fprintf(f, "%sUINT16 %s%u%s;\n", prefix, ansi_highlight(), basic.u16, ansi_highlight_off());
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break;
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case SD_BUS_TYPE_INT32:
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fprintf(f, "%sINT32 %s%i%s;\n", prefix, ansi_highlight(), basic.s32, ansi_highlight_off());
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break;
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case SD_BUS_TYPE_UINT32:
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fprintf(f, "%sUINT32 %s%u%s;\n", prefix, ansi_highlight(), basic.u32, ansi_highlight_off());
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break;
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case SD_BUS_TYPE_INT64:
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fprintf(f, "%sINT64 %s%"PRIi64"%s;\n", prefix, ansi_highlight(), basic.s64, ansi_highlight_off());
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break;
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case SD_BUS_TYPE_UINT64:
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fprintf(f, "%sUINT64 %s%"PRIu64"%s;\n", prefix, ansi_highlight(), basic.u64, ansi_highlight_off());
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break;
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case SD_BUS_TYPE_DOUBLE:
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fprintf(f, "%sDOUBLE %s%g%s;\n", prefix, ansi_highlight(), basic.d64, ansi_highlight_off());
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break;
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case SD_BUS_TYPE_STRING:
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fprintf(f, "%sSTRING \"%s%s%s\";\n", prefix, ansi_highlight(), basic.string, ansi_highlight_off());
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break;
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case SD_BUS_TYPE_OBJECT_PATH:
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fprintf(f, "%sOBJECT_PATH \"%s%s%s\";\n", prefix, ansi_highlight(), basic.string, ansi_highlight_off());
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break;
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case SD_BUS_TYPE_SIGNATURE:
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fprintf(f, "%sSIGNATURE \"%s%s%s\";\n", prefix, ansi_highlight(), basic.string, ansi_highlight_off());
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break;
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case SD_BUS_TYPE_UNIX_FD:
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fprintf(f, "%sUNIX_FD %s%i%s;\n", prefix, ansi_highlight(), basic.i, ansi_highlight_off());
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break;
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default:
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assert_not_reached("Unknown basic type.");
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}
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}
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if (!(flags & BUS_MESSAGE_DUMP_SUBTREE_ONLY))
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fprintf(f, "%s};\n\n", indent(0, flags));
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return 0;
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}
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static void dump_capabilities(
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sd_bus_creds *c,
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FILE *f,
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const char *name,
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int (*has)(sd_bus_creds *c, int capability)) {
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unsigned long i, last_cap;
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unsigned n = 0;
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int r;
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assert(c);
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assert(f);
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assert(name);
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assert(has);
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i = 0;
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r = has(c, i);
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if (r < 0)
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return;
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fprintf(f, " %s=", name);
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last_cap = cap_last_cap();
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for (;;) {
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if (r > 0) {
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_cleanup_cap_free_charp_ char *t;
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if (n > 0)
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fputc(' ', f);
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if (n % 4 == 3)
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fputs("\n ", f);
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t = cap_to_name(i);
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fprintf(f, "%s", t);
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n++;
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}
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i++;
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if (i > last_cap)
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break;
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r = has(c, i);
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}
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fputs("\n", f);
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}
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int bus_creds_dump(sd_bus_creds *c, FILE *f) {
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bool audit_sessionid_is_set = false, audit_loginuid_is_set = false;
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const char *u = NULL, *uu = NULL, *s = NULL, *sl = NULL;
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uid_t owner, audit_loginuid;
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uint32_t audit_sessionid;
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char **cmdline = NULL, **well_known = NULL;
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int r;
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assert(c);
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if (!f)
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f = stdout;
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if (c->mask & SD_BUS_CREDS_PID)
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fprintf(f, " PID="PID_FMT, c->pid);
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if (c->mask & SD_BUS_CREDS_PID_STARTTIME)
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fprintf(f, " PIDStartTime="USEC_FMT, c->pid_starttime);
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if (c->mask & SD_BUS_CREDS_TID)
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fprintf(f, " TID="PID_FMT, c->tid);
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if (c->mask & SD_BUS_CREDS_UID)
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fprintf(f, " UID="UID_FMT, c->uid);
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r = sd_bus_creds_get_owner_uid(c, &owner);
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if (r >= 0)
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fprintf(f, " OwnerUID="UID_FMT, owner);
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if (c->mask & SD_BUS_CREDS_GID)
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fprintf(f, " GID="GID_FMT, c->gid);
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if ((c->mask & (SD_BUS_CREDS_PID|SD_BUS_CREDS_PID_STARTTIME|SD_BUS_CREDS_TID|SD_BUS_CREDS_UID|SD_BUS_CREDS_GID)) || r >= 0)
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fputs("\n", f);
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if (c->mask & SD_BUS_CREDS_EXE)
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fprintf(f, " Exe=%s", c->exe);
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if (c->mask & SD_BUS_CREDS_COMM)
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fprintf(f, " Comm=%s", c->comm);
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if (c->mask & SD_BUS_CREDS_TID_COMM)
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fprintf(f, " TIDComm=%s", c->tid_comm);
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if (c->mask & (SD_BUS_CREDS_EXE|SD_BUS_CREDS_COMM|SD_BUS_CREDS_TID_COMM))
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fputs("\n", f);
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if (c->mask & SD_BUS_CREDS_SELINUX_CONTEXT)
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fprintf(f, " Label=%s", c->label);
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if (c->mask & SD_BUS_CREDS_DESCRIPTION)
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fprintf(f, " Description=%s", c->description);
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if (c->mask & (SD_BUS_CREDS_SELINUX_CONTEXT|SD_BUS_CREDS_DESCRIPTION))
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fputs("\n", f);
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if (sd_bus_creds_get_cmdline(c, &cmdline) >= 0) {
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char **i;
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fputs(" CommandLine={", f);
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STRV_FOREACH(i, cmdline) {
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if (i != cmdline)
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fputc(' ', f);
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fputs(*i, f);
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}
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fputs("}\n", f);
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}
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if (c->mask & SD_BUS_CREDS_CGROUP)
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fprintf(f, " CGroup=%s", c->cgroup);
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sd_bus_creds_get_unit(c, &u);
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if (u)
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fprintf(f, " Unit=%s", u);
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sd_bus_creds_get_user_unit(c, &uu);
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if (uu)
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fprintf(f, " UserUnit=%s", uu);
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sd_bus_creds_get_slice(c, &sl);
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if (sl)
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fprintf(f, " Slice=%s", sl);
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sd_bus_creds_get_session(c, &s);
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if (s)
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fprintf(f, " Session=%s", s);
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if ((c->mask & SD_BUS_CREDS_CGROUP) || u || uu || sl || s)
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fputs("\n", f);
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if (sd_bus_creds_get_audit_login_uid(c, &audit_loginuid) >= 0) {
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audit_loginuid_is_set = true;
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fprintf(f, " AuditLoginUID="UID_FMT, audit_loginuid);
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}
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if (sd_bus_creds_get_audit_session_id(c, &audit_sessionid) >= 0) {
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audit_sessionid_is_set = true;
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fprintf(f, " AuditSessionID=%"PRIu32, audit_sessionid);
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}
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if (audit_loginuid_is_set || audit_sessionid_is_set)
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fputs("\n", f);
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if (c->mask & SD_BUS_CREDS_UNIQUE_NAME)
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fprintf(f, " UniqueName=%s", c->unique_name);
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if (sd_bus_creds_get_well_known_names(c, &well_known) >= 0) {
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char **i;
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fputs(" WellKnownNames={", f);
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STRV_FOREACH(i, well_known) {
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if (i != well_known)
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fputc(' ', f);
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fputs(*i, f);
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}
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fputc('}', f);
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}
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if (c->mask & SD_BUS_CREDS_UNIQUE_NAME || well_known)
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fputc('\n', f);
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dump_capabilities(c, f, "EffectiveCapabilities", sd_bus_creds_has_effective_cap);
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dump_capabilities(c, f, "PermittedCapabilities", sd_bus_creds_has_permitted_cap);
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dump_capabilities(c, f, "InheritableCapabilities", sd_bus_creds_has_inheritable_cap);
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dump_capabilities(c, f, "BoundingCapabilities", sd_bus_creds_has_bounding_cap);
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return 0;
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}
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/*
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* For details about the file format, see:
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*
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* http://wiki.wireshark.org/Development/LibpcapFileFormat
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*/
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typedef struct _packed_ pcap_hdr_s {
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uint32_t magic_number; /* magic number */
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uint16_t version_major; /* major version number */
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uint16_t version_minor; /* minor version number */
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int32_t thiszone; /* GMT to local correction */
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uint32_t sigfigs; /* accuracy of timestamps */
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uint32_t snaplen; /* max length of captured packets, in octets */
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uint32_t network; /* data link type */
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} pcap_hdr_t ;
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typedef struct _packed_ pcaprec_hdr_s {
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uint32_t ts_sec; /* timestamp seconds */
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uint32_t ts_usec; /* timestamp microseconds */
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uint32_t incl_len; /* number of octets of packet saved in file */
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uint32_t orig_len; /* actual length of packet */
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} pcaprec_hdr_t;
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int bus_pcap_header(size_t snaplen, FILE *f) {
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pcap_hdr_t hdr = {
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.magic_number = 0xa1b2c3d4U,
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.version_major = 2,
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.version_minor = 4,
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.thiszone = 0, /* UTC */
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.sigfigs = 0,
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.network = 231, /* D-Bus */
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};
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if (!f)
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f = stdout;
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assert(snaplen > 0);
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assert((size_t) (uint32_t) snaplen == snaplen);
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|
|
|
hdr.snaplen = (uint32_t) snaplen;
|
|
|
|
fwrite(&hdr, 1, sizeof(hdr), f);
|
|
fflush(f);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int bus_message_pcap_frame(sd_bus_message *m, size_t snaplen, FILE *f) {
|
|
struct bus_body_part *part;
|
|
pcaprec_hdr_t hdr = {};
|
|
struct timeval tv;
|
|
unsigned i;
|
|
size_t w;
|
|
|
|
if (!f)
|
|
f = stdout;
|
|
|
|
assert(m);
|
|
assert(snaplen > 0);
|
|
assert((size_t) (uint32_t) snaplen == snaplen);
|
|
|
|
if (m->realtime != 0)
|
|
timeval_store(&tv, m->realtime);
|
|
else
|
|
assert_se(gettimeofday(&tv, NULL) >= 0);
|
|
|
|
hdr.ts_sec = tv.tv_sec;
|
|
hdr.ts_usec = tv.tv_usec;
|
|
hdr.orig_len = BUS_MESSAGE_SIZE(m);
|
|
hdr.incl_len = MIN(hdr.orig_len, snaplen);
|
|
|
|
/* write the pcap header */
|
|
fwrite(&hdr, 1, sizeof(hdr), f);
|
|
|
|
/* write the dbus header */
|
|
w = MIN(BUS_MESSAGE_BODY_BEGIN(m), snaplen);
|
|
fwrite(m->header, 1, w, f);
|
|
snaplen -= w;
|
|
|
|
/* write the dbus body */
|
|
MESSAGE_FOREACH_PART(part, i, m) {
|
|
if (snaplen <= 0)
|
|
break;
|
|
|
|
w = MIN(part->size, snaplen);
|
|
fwrite(part->data, 1, w, f);
|
|
snaplen -= w;
|
|
}
|
|
|
|
fflush(f);
|
|
|
|
return 0;
|
|
}
|