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| author | Denys Vlasenko | 2010-10-20 22:08:16 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2010-10-20 22:08:16 +0200 |
| commit | c72c1d7b317ecd7dc93bae86ad24e40402b9a2d1 (patch) | |
| tree | 74999022da7348562b6a035dc2f45b6710c75255 /networking/udhcp/dhcpc.c | |
| parent | a5048fa386b4c54f269c0a23c579970acdd1edd5 (diff) | |
| download | busybox-c72c1d7b317ecd7dc93bae86ad24e40402b9a2d1.zip busybox-c72c1d7b317ecd7dc93bae86ad24e40402b9a2d1.tar.gz | |
udhcpc: reduce stack usage by de-inlining routines with on-stack pkt buf
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking/udhcp/dhcpc.c')
| -rw-r--r-- | networking/udhcp/dhcpc.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c index f0c8ace..7b679d1 100644 --- a/networking/udhcp/dhcpc.c +++ b/networking/udhcp/dhcpc.c @@ -362,12 +362,6 @@ static void add_client_options(struct dhcp_packet *packet) int i, end, len; udhcp_add_simple_option(packet, DHCP_MAX_SIZE, htons(IP_UDP_DHCP_SIZE)); - if (client_config.hostname) - udhcp_add_binary_option(packet, client_config.hostname); - if (client_config.fqdn) - udhcp_add_binary_option(packet, client_config.fqdn); - if (client_config.vendorclass) - udhcp_add_binary_option(packet, client_config.vendorclass); /* Add a "param req" option with the list of options we'd like to have * from stubborn DHCP servers. Pull the data from the struct in common.c. @@ -390,6 +384,13 @@ static void add_client_options(struct dhcp_packet *packet) packet->options[end + OPT_DATA + len] = DHCP_END; } + if (client_config.vendorclass) + udhcp_add_binary_option(packet, client_config.vendorclass); + if (client_config.hostname) + udhcp_add_binary_option(packet, client_config.hostname); + if (client_config.fqdn) + udhcp_add_binary_option(packet, client_config.fqdn); + /* Add -x options if any */ { struct option_set *curr = client_config.options; @@ -431,7 +432,7 @@ static int raw_bcast_from_client_config_ifindex(struct dhcp_packet *packet) } /* Broadcast a DHCP discover packet to the network, with an optionally requested IP */ -static int send_discover(uint32_t xid, uint32_t requested) +static NOINLINE int send_discover(uint32_t xid, uint32_t requested) { struct dhcp_packet packet; @@ -459,7 +460,7 @@ static int send_discover(uint32_t xid, uint32_t requested) /* RFC 2131 3.1 paragraph 3: * "The client _broadcasts_ a DHCPREQUEST message..." */ -static int send_select(uint32_t xid, uint32_t server, uint32_t requested) +static NOINLINE int send_select(uint32_t xid, uint32_t server, uint32_t requested) { struct dhcp_packet packet; struct in_addr addr; @@ -542,7 +543,7 @@ static int send_renew(uint32_t xid, uint32_t server, uint32_t ciaddr) #if ENABLE_FEATURE_UDHCPC_ARPING /* Broadcast a DHCP decline message */ -static int send_decline(uint32_t xid, uint32_t server, uint32_t requested) +static NOINLINE int send_decline(uint32_t xid, uint32_t server, uint32_t requested) { struct dhcp_packet packet; @@ -1356,7 +1357,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) /* TODO: why we don't just fetch server's IP from IP header? */ temp = udhcp_get_option(&packet, DHCP_SERVER_ID); if (!temp) { - bb_error_msg("no server ID in message"); + bb_error_msg("no server ID, ignoring packet"); continue; /* still selecting - this server looks bad */ } |