1 #include <string.h> 2 3 #include <sys/gpxe.h> 4 #include <syslinux/config.h> 5 #include <syslinux/pxe_api.h> 6 7 bool is_gpxe(void) 8 { 9 const struct syslinux_version *sv; 10 struct s_PXENV_FILE_CHECK_API *fca; 11 bool gpxe; 12 int err; 13 14 sv = syslinux_version(); 15 if (sv->filesystem != SYSLINUX_FS_PXELINUX) 16 return false; /* Not PXELINUX */ 17 18 fca = lzalloc(sizeof *fca); 19 if (!fca) 20 return false; 21 22 fca->Size = sizeof *fca; 23 fca->Magic = 0x91d447b2; 24 25 err = pxe_call(PXENV_FILE_API_CHECK, fca); 26 27 gpxe = true; 28 29 if (err) 30 gpxe = false; /* Cannot invoke PXE stack */ 31 32 if (fca->Status) 33 gpxe = false; /* PXE failure */ 34 35 if (fca->Magic != 0xe9c17b20) 36 gpxe = false; /* Incorrect magic */ 37 38 if (fca->Size < sizeof *fca) 39 gpxe = false; /* Short return */ 40 41 /* XXX: The APIs to test for should be a passed-in option */ 42 if (!(fca->APIMask & (1 << 5))) 43 gpxe = false; /* No FILE EXEC */ 44 45 lfree(fca); 46 return gpxe; 47 } 48
