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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2009-07-19 04:24:23 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2009-07-19 04:24:23 +0200 |
| commit | 7d6a791ef6c6232afba765c14597153c64fecfc9 (patch) | |
| tree | d92603efcea18b209282567b4f3c93b08e4834e5 /networking/udhcp/dhcpc.c | |
| parent | 13ca4b12e2c7d022a1dcb5a4d9923bb176fe69a7 (diff) | |
| download | busybox-w32-7d6a791ef6c6232afba765c14597153c64fecfc9.tar.gz busybox-w32-7d6a791ef6c6232afba765c14597153c64fecfc9.tar.bz2 busybox-w32-7d6a791ef6c6232afba765c14597153c64fecfc9.zip | |
udhcpc: add/edit comments, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to '')
| -rw-r--r-- | networking/udhcp/dhcpc.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c index 8b6019bc9..fcc447949 100644 --- a/networking/udhcp/dhcpc.c +++ b/networking/udhcp/dhcpc.c | |||
| @@ -29,7 +29,7 @@ static smallint listen_mode; | |||
| 29 | #define REQUESTING 1 | 29 | #define REQUESTING 1 |
| 30 | /* select/renew was sent, DHCPACK reply received */ | 30 | /* select/renew was sent, DHCPACK reply received */ |
| 31 | #define BOUND 2 | 31 | #define BOUND 2 |
| 32 | /* half of lease passed, want renew it by sending unicast renew requests */ | 32 | /* half of lease passed, want to renew it by sending unicast renew requests */ |
| 33 | #define RENEWING 3 | 33 | #define RENEWING 3 |
| 34 | /* renew requests were not answered, lease is almost over, send broadcast renew */ | 34 | /* renew requests were not answered, lease is almost over, send broadcast renew */ |
| 35 | #define REBINDING 4 | 35 | #define REBINDING 4 |
| @@ -424,7 +424,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) | |||
| 424 | state = INIT_SELECTING; | 424 | state = INIT_SELECTING; |
| 425 | goto leasefail; | 425 | goto leasefail; |
| 426 | case BOUND: | 426 | case BOUND: |
| 427 | /* Half of the lease passed, time to enter renewing state */ | 427 | /* 1/2 lease passed, enter renewing state */ |
| 428 | state = RENEWING; | 428 | state = RENEWING; |
| 429 | change_listen_mode(LISTEN_KERNEL); | 429 | change_listen_mode(LISTEN_KERNEL); |
| 430 | log1("Entering renew state"); | 430 | log1("Entering renew state"); |
| @@ -433,7 +433,15 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) | |||
| 433 | case_RENEW_REQUESTED: | 433 | case_RENEW_REQUESTED: |
| 434 | case RENEWING: | 434 | case RENEWING: |
| 435 | if (timeout > 60) { | 435 | if (timeout > 60) { |
| 436 | /* send an unicast renew request packet */ | 436 | /* send an unicast renew request */ |
| 437 | /* Sometimes observed to fail (EADDRNOTAVAIL) to bind | ||
| 438 | * a new UDP socket for sending inside send_renew. | ||
| 439 | * I hazard to guess existing listening socket | ||
| 440 | * is somehow conflicting with it, but why is it | ||
| 441 | * not deterministic then?! Strange. | ||
| 442 | * Anyway, it does recover by eventually failing throigh | ||
| 443 | * into INIT_SELECTING state. | ||
| 444 | */ | ||
| 437 | send_renew(xid, server_addr, requested_ip); | 445 | send_renew(xid, server_addr, requested_ip); |
| 438 | timeout >>= 1; | 446 | timeout >>= 1; |
| 439 | continue; | 447 | continue; |
| @@ -446,7 +454,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) | |||
| 446 | /* Lease is *really* about to run out, | 454 | /* Lease is *really* about to run out, |
| 447 | * try to find DHCP server using broadcast */ | 455 | * try to find DHCP server using broadcast */ |
| 448 | if (timeout > 0) { | 456 | if (timeout > 0) { |
| 449 | /* send a broadcast renew request packet */ | 457 | /* send a broadcast renew request */ |
| 450 | send_renew(xid, 0 /*INADDR_ANY*/, requested_ip); | 458 | send_renew(xid, 0 /*INADDR_ANY*/, requested_ip); |
| 451 | timeout >>= 1; | 459 | timeout >>= 1; |
| 452 | continue; | 460 | continue; |
| @@ -477,7 +485,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) | |||
| 477 | goto case_RENEW_REQUESTED; | 485 | goto case_RENEW_REQUESTED; |
| 478 | /* Start things over */ | 486 | /* Start things over */ |
| 479 | packet_num = 0; | 487 | packet_num = 0; |
| 480 | /* Kill any timeouts because the user wants this to hurry along */ | 488 | /* Kill any timeouts, user wants this to hurry along */ |
| 481 | timeout = 0; | 489 | timeout = 0; |
| 482 | continue; | 490 | continue; |
| 483 | case SIGUSR2: | 491 | case SIGUSR2: |