diff options
| author | Denys Vlasenko <vda.linux@googlemail.com> | 2019-05-23 15:24:03 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2019-05-23 15:24:03 +0200 |
| commit | 1115e40c887fc4d9ddddbe2b0d71c091065ee997 (patch) | |
| tree | e0793d3a5f7b7bc04eb313b93cc38817b1429458 /networking/udhcp | |
| parent | 58d998d2f927c20f2ba728611df587ac8ec8bda9 (diff) | |
| download | busybox-1115e40c887fc4d9ddddbe2b0d71c091065ee997.tar.gz | |
dhcp: tweak comments, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking/udhcp')
| -rw-r--r-- | networking/udhcp/common.h | 52 |
1 files changed, 22 insertions, 30 deletions
diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h index a897837f9..bba3d6037 100644 --- a/networking/udhcp/common.h +++ b/networking/udhcp/common.h @@ -40,7 +40,7 @@ struct dhcp_packet { uint32_t yiaddr; /* 'your' (client) IP address */ /* IP address of next server to use in bootstrap, returned in DHCPOFFER, DHCPACK by server */ uint32_t siaddr_nip; - uint32_t gateway_nip; /* relay agent IP address */ + uint32_t gateway_nip; /* aka 'giaddr': relay agent IP address */ uint8_t chaddr[16]; /* link-layer client hardware address (MAC) */ uint8_t sname[64]; /* server host name (ASCIZ) */ uint8_t file[128]; /* boot file name (ASCIZ) */ @@ -222,10 +222,9 @@ uint8_t *dname_enc(const uint8_t *cstr, int clen, const char *src, int *retlen) #endif struct option_set *udhcp_find_option(struct option_set *opt_list, uint8_t code) FAST_FUNC; - // RFC 2131 Table 5: Fields and options used by DHCP clients // -// Fields 'hops', 'yiaddr', 'siaddr', 'giaddr' are always zero +// Fields 'hops', 'yiaddr', 'siaddr', 'giaddr' are always zero, 'chaddr' is always client's MAC // // Field DHCPDISCOVER DHCPINFORM DHCPREQUEST DHCPDECLINE DHCPRELEASE // ----- ------------ ------------ ----------- ----------- ----------- @@ -234,40 +233,33 @@ struct option_set *udhcp_find_option(struct option_set *opt_list, uint8_t code) // 'secs' 0 or seconds since 0 or seconds since 0 or seconds since 0 0 // DHCP process started DHCP process started DHCP process started // 'flags' Set 'BROADCAST' Set 'BROADCAST' Set 'BROADCAST' 0 0 -// flag if client flag if client flag if client -// requires broadcast requires broadcast requires broadcast -// reply reply reply +// flag if client needs flag if client needs flag if client needs +// broadcast reply broadcast reply broadcast reply // 'ciaddr' 0 client's IP 0 or client's IP 0 client's IP // (BOUND/RENEW/REBIND) -// 'chaddr' client's MAC client's MAC client's MAC client's MAC client's MAC // 'sname' options or sname options or sname options or sname (unused) (unused) // 'file' options or file options or file options or file (unused) (unused) // 'options' options options options message type opt message type opt // -// Option DHCPDISCOVER DHCPINFORM DHCPREQUEST DHCPDECLINE DHCPRELEASE -// ------ ------------ ---------- ----------- ----------- ----------- -// Requested IP address MAY MUST NOT MUST (in MUST MUST NOT -// SELECTING or -// INIT-REBOOT) -// MUST NOT (in -// BOUND or -// RENEWING) -// IP address lease time MAY MUST NOT MAY MUST NOT MUST NOT -// Use 'file'/'sname' fields MAY MAY MAY MAY MAY -// Client identifier MAY MAY MAY MAY MAY -// Vendor class identifier MAY MAY MAY MUST NOT MUST NOT -// Server identifier MUST NOT MUST NOT MUST (after MUST MUST -// SELECTING) +// Option DHCPDISCOVER DHCPINFORM DHCPREQUEST DHCPDECLINE DHCPRELEASE +// ------ ------------ ---------- ----------- ----------- ----------- +// Requested IP address MAY MUST NOT MUST (in SELECTING MUST MUST NOT +// or INIT-REBOOT) +// MUST NOT (in BOUND +// or RENEWING) +// IP address lease time MAY MUST NOT MAY MUST NOT MUST NOT +// Use 'file'/'sname' fields MAY MAY MAY MAY MAY +// Client identifier MAY MAY MAY MAY MAY +// Vendor class identifier MAY MAY MAY MUST NOT MUST NOT +// Server identifier MUST NOT MUST NOT MUST (after SELECTING) MUST MUST // MUST NOT (after -// INIT-REBOOT, -// BOUND, RENEWING -// or REBINDING) -// Parameter request list MAY MAY MAY MUST NOT MUST NOT -// Maximum message size MAY MAY MAY MUST NOT MUST NOT -// Message SHOULD NOT SHOULD NOT SHOULD NOT SHOULD SHOULD -// Site-specific MAY MAY MAY MUST NOT MUST NOT -// All others MAY MAY MAY MUST NOT MUST NOT - +// INIT-REBOOT, BOUND, +// RENEWING or REBINDING) +// Parameter request list MAY MAY MAY MUST NOT MUST NOT +// Maximum message size MAY MAY MAY MUST NOT MUST NOT +// Message SHOULD NOT SHOULD NOT SHOULD NOT SHOULD SHOULD +// Site-specific MAY MAY MAY MUST NOT MUST NOT +// All others MAY MAY MAY MUST NOT MUST NOT /*** Logging ***/ |