lib/rpmlead.c

   1 /** \ingroup lead
   2  * \file lib/rpmlead.c
   3  */
   4
   5 #include "system.h"
   6
   7 #include <netinet/in.h>
   8
   9 #include <rpmlib.h>
  10
  11 #include "signature.h"
  12 #include "rpmlead.h"
  13 #include "debug.h"
  14
  15 static unsigned char lead_magic[] = {
  16     RPMLEAD_MAGIC0, RPMLEAD_MAGIC1, RPMLEAD_MAGIC2, RPMLEAD_MAGIC3
  17 };
  18
  19 /* The lead needs to be 8 byte aligned */
  20
  21 rpmRC writeLead(FD_t fd, const struct rpmlead *lead)
  22 {
  23     struct rpmlead l;
  24
  25     memcpy(&l, lead, sizeof(l));
  26
  27     memcpy(&l.magic, lead_magic, sizeof(l.magic));
  28     l.type = htons(l.type);
  29     l.archnum = htons(l.archnum);
  30     l.osnum = htons(l.osnum);
  31     l.signature_type = htons(l.signature_type);
  32
  33     if (Fwrite(&l, 1, sizeof(l), fd) != sizeof(l))
  34         return RPMRC_FAIL;
  35
  36     return RPMRC_OK;
  37 }
  38
  39 rpmRC readLead(FD_t fd, struct rpmlead *lead)
  40 {
  41     memset(lead, 0, sizeof(*lead));
  42     /* FIX: remove timed read */
  43     if (timedRead(fd, (char *)lead, sizeof(*lead)) != sizeof(*lead)) {
  44         if (Ferror(fd)) {
  45             rpmError(RPMERR_READ, _("read failed: %s (%d)\n"),
  46                         Fstrerror(fd), errno);
  47             return RPMRC_FAIL;
  48         }
  49         return RPMRC_NOTFOUND;
  50     }
  51
  52     if (memcmp(lead->magic, lead_magic, sizeof(lead_magic)))
  53         return RPMRC_NOTFOUND;
  54     lead->type = ntohs(lead->type);
  55     lead->archnum = ntohs(lead->archnum);
  56     lead->osnum = ntohs(lead->osnum);
  57     lead->signature_type = ntohs(lead->signature_type);
  58     if (lead->signature_type != RPMSIGTYPE_HEADERSIG)
  59         return RPMRC_NOTFOUND;
  60
  61     return RPMRC_OK;
  62 }