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[ipaccess] Spend some more time on figuring out the format

This commit is contained in:
Holger Hans Peter Freyther 2009-12-24 10:19:51 +01:00
parent 7ed2529c5b
commit 9094cbaf9c
1 changed files with 32 additions and 24 deletions
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56
openbsc/src/ipaccess-firmware/ipaccess-firmware.c
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@ -29,49 +29,57 @@
#include <string.h>
struct sdp_firmware {
char magic[4];
char more_magic[4];
unsigned int header_length;
unsigned int file_length;
char sw_part[20];
char text1[122];
u_int8_t no_idea_1[4];
char text2[64];
char time[8];
u_int8_t no_idea_2[4];
char date[8];
u_int8_t no_idea_3[6];
/* stuff i don't know */
} __attribute__((packed));
/* more magic, the second "int" in the header */
static char more_magic[] = { 0x10, 0x02, 0x00, 0x0 };
static void analyze_file(int fd)
{
struct sdp_firmware *firmware_header;
char buf[4096];
int rc;
unsigned int absolute_size;
rc = read(fd, buf, 4);
if (rc <= 0) {
fprintf(stderr, "Not enough space for the header.\n");
rc = read(fd, buf, sizeof(*firmware_header));
if (rc < 0) {
perror("can not read header");
return;
}
if (strcmp(buf, " SDP") != 0) {
fprintf(stderr, "Wrong magic number at the beginning of the file.\n");
firmware_header = (struct sdp_firmware *) &buf[0];
if (strncmp(firmware_header->magic, " SDP", 4) != 0) {
fprintf(stderr, "Wrong magic.\n");
return;
}
rc = read(fd, buf, 4);
if (rc <= 0) {
fprintf(stderr, "Not enough space for the more_magic.\n");
if (memcmp(firmware_header->more_magic, more_magic, 4) != 0) {
fprintf(stderr, "Wrong more magic.\n");
return;
}
if (strncmp(buf, more_magic, 4) != 0) {
fprintf(stderr, "The more magic is not right.\n");
return;
}
rc = read(fd, buf, 4);
if (rc <= 0) {
fprintf(stderr, "Trying to read the header length failed.\n");
return;
}
memcpy(&absolute_size, &buf[0], 4);
absolute_size = ntohl(absolute_size);
printf("Printing header information:\n");
printf("The header is %u bytes long\n", absolute_size);
printf("header_length: %u\n", ntohl(firmware_header->header_length));
printf("file_length: %u\n", ntohl(firmware_header->file_length));
printf("sw_part: %.20s\n", firmware_header->sw_part);
printf("text1: %.122s\n", firmware_header->text1);
printf("text2: %.64s\n", firmware_header->text2);
printf("time: %.8s\n", firmware_header->time);
printf("date: %.8s\n", firmware_header->date);
}
int main(int argc, char** argv)