diff options
Diffstat (limited to 'net/bootp.c')
| -rw-r--r-- | net/bootp.c | 38 |
1 files changed, 31 insertions, 7 deletions
diff --git a/net/bootp.c b/net/bootp.c index fdb97cb562..a4f6db570c 100644 --- a/net/bootp.c +++ b/net/bootp.c @@ -23,12 +23,22 @@ #define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */ -#define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */ +/* + * The timeout for the initial BOOTP/DHCP request used to be described by a + * counter of fixed-length timeout periods. TIMEOUT_COUNT represents + * that counter + * + * Now that the timeout periods are variable (exponential backoff and retry) + * we convert the timeout count to the absolute time it would have take to + * execute that many retries, and keep sending retry packets until that time + * is reached. + */ #ifndef CONFIG_NET_RETRY_COUNT # define TIMEOUT_COUNT 5 /* # of timeouts before giving up */ #else # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) #endif +#define TIMEOUT_MS ((3 + (TIMEOUT_COUNT * 5)) * 1000) #define PORT_BOOTPS 67 /* BOOTP server UDP port */ #define PORT_BOOTPC 68 /* BOOTP client UDP port */ @@ -39,6 +49,8 @@ ulong BootpID; int BootpTry; +ulong bootp_start; +ulong bootp_timeout; #if defined(CONFIG_CMD_DHCP) static dhcp_state_t dhcp_state = INIT; @@ -327,16 +339,21 @@ BootpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, static void BootpTimeout(void) { - if (BootpTry >= TIMEOUT_COUNT) { + ulong time_taken = get_timer(bootp_start); + + if (time_taken >= TIMEOUT_MS) { #ifdef CONFIG_BOOTP_MAY_FAIL - puts("\nRetry count exceeded\n"); + puts("\nRetry time exceeded\n"); net_set_state(NETLOOP_FAIL); #else - puts("\nRetry count exceeded; starting again\n"); + puts("\nRetry time exceeded; starting again\n"); NetStartAgain(); #endif } else { - NetSetTimeout(TIMEOUT, BootpTimeout); + bootp_timeout *= 2; + if (bootp_timeout > 1000) + bootp_timeout = 1000; + NetSetTimeout(bootp_timeout, BootpTimeout); BootpRequest(); } } @@ -597,6 +614,13 @@ static int BootpExtended(u8 *e) } #endif +void BootpReset(void) +{ + BootpTry = 0; + bootp_start = get_timer(0); + bootp_timeout = 10; +} + void BootpRequest(void) { @@ -685,7 +709,7 @@ BootpRequest(void) iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen; pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen; net_set_udp_header(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); - NetSetTimeout(SELECT_TIMEOUT, BootpTimeout); + NetSetTimeout(bootp_timeout, BootpTimeout); #if defined(CONFIG_CMD_DHCP) dhcp_state = SELECTING; @@ -918,7 +942,7 @@ DhcpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, htonl(BOOTP_VENDOR_MAGIC)) DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp); - NetSetTimeout(TIMEOUT, BootpTimeout); + NetSetTimeout(5000, BootpTimeout); DhcpSendRequestPkt(bp); #ifdef CONFIG_SYS_BOOTFILE_PREFIX } |
