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Add dhcp_snprintf() for extracting DHCP string options.

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This commit is contained in:
Michael Brown
2006-07-20 14:13:11 +00:00
parent 7ca8bcd98c
commit b26806cf18
2 changed files with 44 additions and 0 deletions
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10
src/include/gpxe/dhcp.h
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@@ -160,6 +160,13 @@
*/
#define DHCP_EB_SIADDR DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 3 )
/** BIOS drive number
*
* This is the drive number for a drive emulated via INT 13. 0x80 is
* the first hard disk, 0x81 is the second hard disk, etc.
*/
#define DHCP_EB_BIOS_DRIVE DHCP_ENCAP_OPT ( DHCP_EB_ENCAP, 0xbd )
/** Maximum normal DHCP option */
#define DHCP_MAX_OPTION 254
@@ -255,6 +262,7 @@ struct dhcp_option {
uint32_t dword;
struct in_addr in;
uint8_t bytes[0];
char string[0];
} data;
} __attribute__ (( packed ));
@@ -435,6 +443,8 @@ struct dhcp_session {
extern unsigned long dhcp_num_option ( struct dhcp_option *option );
extern void dhcp_ipv4_option ( struct dhcp_option *option,
struct in_addr *inp );
extern int dhcp_snprintf ( char *buf, size_t size,
struct dhcp_option *option );
extern struct dhcp_option *
find_dhcp_option ( struct dhcp_option_block *options, unsigned int tag );
extern void register_dhcp_options ( struct dhcp_option_block *options );