ipa-firmware: Remove the part_length from the struct sdp_firmware
* The length of the table is not at a fixed position. We will need to read the offset, seek there, read the data, convert it to the host endianes. * Prepare the code to work with offsets of 0...
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@ -69,8 +69,7 @@ struct sdp_firmware {
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char date[14];
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char text2[10];
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char version[20];
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u_int8_t dummy[2];
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u_int16_t part_length;
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u_int16_t table_offset;
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/* stuff i don't know */
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} __attribute__((packed));
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@ -31,7 +31,7 @@
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#define PART_LENGTH 138
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static_assert(sizeof(struct sdp_header_entry) == 138, right_entry);
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static_assert(sizeof(struct sdp_firmware) == 160, _right_header_length);
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static_assert(sizeof(struct sdp_firmware) == 158, _right_header_length);
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/* more magic, the second "int" in the header */
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static char more_magic[] = { 0x10, 0x02 };
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@ -42,6 +42,9 @@ int ipaccess_analyze_file(int fd, const unsigned int st_size, const unsigned int
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struct sdp_header *header;
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char buf[4096];
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int rc, i;
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u_int16_t table_size;
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u_int16_t table_offset;
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rc = read(fd, buf, sizeof(*firmware_header));
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if (rc < 0) {
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@ -80,17 +83,29 @@ int ipaccess_analyze_file(int fd, const unsigned int st_size, const unsigned int
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return -1;
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}
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table_offset = ntohs(firmware_header->table_offset);
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if (lseek(fd, table_offset, SEEK_CUR) == -1) {
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fprintf(stderr, "Failed to seek to the rel position: 0x%x\n", table_offset);
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return -1;
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}
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if (ntohs(firmware_header->part_length) % PART_LENGTH != 0) {
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fprintf(stderr, "The part length seems to be wrong.\n");
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if (read(fd, &table_size, sizeof(table_size)) != sizeof(table_size)) {
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fprintf(stderr, "The table size could not be read.\n");
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return -1;
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}
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table_size = ntohs(table_size);
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if (table_size % PART_LENGTH != 0) {
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fprintf(stderr, "The part length seems to be wrong: 0x%x\n", table_size);
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return -1;
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}
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/* look into each firmware now */
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for (i = 0; i < ntohs(firmware_header->part_length) / PART_LENGTH; ++i) {
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for (i = 0; i < table_size / PART_LENGTH; ++i) {
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struct sdp_header_entry entry;
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struct sdp_header_item *header_entry;
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unsigned int offset = base_offset + sizeof(struct sdp_firmware);
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unsigned int offset = base_offset + sizeof(struct sdp_firmware) + 2;
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offset += i * 138;
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if (lseek(fd, offset, SEEK_SET) != offset) {
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