udev/cdrom: use unaligned_read_be32() or friends
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@ -29,6 +29,7 @@
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#include "string-table.h"
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#include "string-util.h"
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#include "udev-util.h"
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#include "unaligned.h"
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static bool arg_eject = false;
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static bool arg_lock = false;
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@ -349,7 +350,7 @@ static int feature_profiles(Context *c, const unsigned char *profiles, size_t si
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assert(c);
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for (size_t i = 0; i + 4 <= size; i += 4) {
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r = set_drive_feature(c, (Feature) (profiles[i] << 8 | profiles[i + 1]));
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r = set_drive_feature(c, (Feature) unaligned_read_be16(&profiles[i]));
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if (r < 0)
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return log_oom_debug();
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}
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@ -434,7 +435,7 @@ static int cd_profiles(Context *c) {
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return log_scsi_debug_errno(r, "get configuration");
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}
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cur_profile = features[6] << 8 | features[7];
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cur_profile = unaligned_read_be16(&features[6]);
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if (cur_profile > 0) {
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log_debug("current profile 0x%02x", cur_profile);
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c->media_feature = (Feature) cur_profile;
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@ -444,7 +445,7 @@ static int cd_profiles(Context *c) {
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c->has_media = false;
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}
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len = features[0] << 24 | features[1] << 16 | features[2] << 8 | features[3];
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len = unaligned_read_be32(features);
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log_debug("GET CONFIGURATION: size of features buffer 0x%04x", len);
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if (len > sizeof(features)) {
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@ -464,7 +465,7 @@ static int cd_profiles(Context *c) {
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return r;
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/* parse the length once more, in case the drive decided to have other features suddenly :) */
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len = features[0] << 24 | features[1] << 16 | features[2] << 8 | features[3];
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len = unaligned_read_be32(features);
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log_debug("GET CONFIGURATION: size of features buffer 0x%04x", len);
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if (len > sizeof(features)) {
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@ -476,12 +477,12 @@ static int cd_profiles(Context *c) {
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for (i = 8; i+4 < len; i += (4 + features[i+3])) {
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unsigned feature;
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feature = features[i] << 8 | features[i+1];
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feature = unaligned_read_be16(&features[i]);
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switch (feature) {
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case 0x00:
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log_debug("GET CONFIGURATION: feature 'profiles', with %i entries", features[i+3] / 4);
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feature_profiles(c, &features[i] + 4, MIN(features[i+3], len - i - 4));
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feature_profiles(c, features + i + 4, MIN(features[i+3], len - i - 4));
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break;
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default:
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log_debug("GET CONFIGURATION: feature 0x%04x <ignored>, with 0x%02x bytes", feature, features[i+3]);
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@ -683,7 +684,7 @@ static int cd_media_toc(Context *c) {
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if (r < 0)
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return r;
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len = (header[0] << 8 | header[1]) + 2;
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len = unaligned_read_be16(header) + 2;
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log_debug("READ TOC: len: %d, start track: %d, end track: %d", len, header[2], header[3]);
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if (len > sizeof(toc))
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return -1;
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@ -715,7 +716,7 @@ static int cd_media_toc(Context *c) {
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is_data_track = (p[1] & 0x04) != 0;
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block = p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7];
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block = unaligned_read_be32(&p[4]);
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log_debug("track=%u info=0x%x(%s) start_block=%u",
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p[2], p[1] & 0x0f, is_data_track ? "data":"audio", block);
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@ -734,7 +735,7 @@ static int cd_media_toc(Context *c) {
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if (r < 0)
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return r;
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len = header[4+4] << 24 | header[4+5] << 16 | header[4+6] << 8 | header[4+7];
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len = unaligned_read_be32(&header[8]);
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log_debug("last track %u starts at block %u", header[4+2], len);
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c->media_session_last_offset = (uint64_t) len * 2048;
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