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My first bout of untangling udhcp. Make lots of gratuitous #defines go

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away, substitutie BB_VER for an external VERSION, use busybox CONFIG symbols
rather than checking for them then defining others, etc.  Lots more cleanup
to do...
This commit is contained in:
Rob Landley
2006-05-28 01:06:36 +00:00
parent 8fba99f35e
commit 3f78561d63
17 changed files with 86 additions and 221 deletions
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14
networking/udhcp/packet.c
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@ -20,7 +20,7 @@
#include "options.h"
void init_header(struct dhcpMessage *packet, char type)
void udhcp_init_header(struct dhcpMessage *packet, char type)
{
memset(packet, 0, sizeof(struct dhcpMessage));
switch (type) {
@ -44,7 +44,7 @@ void init_header(struct dhcpMessage *packet, char type)
/* read a packet from socket fd, return -1 on read error, -2 on packet error */
int get_packet(struct dhcpMessage *packet, int fd)
int udhcp_get_packet(struct dhcpMessage *packet, int fd)
{
static const char broken_vendors[][8] = {
"MSFT 98",
@ -82,7 +82,7 @@ int get_packet(struct dhcpMessage *packet, int fd)
}
uint16_t checksum(void *addr, int count)
uint16_t udhcp_checksum(void *addr, int count)
{
/* Compute Internet Checksum for "count" bytes
* beginning at location "addr".
@ -113,7 +113,7 @@ uint16_t checksum(void *addr, int count)
/* Construct a ip/udp header for a packet, and specify the source and dest hardware address */
int raw_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
int udhcp_raw_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
uint32_t dest_ip, int dest_port, uint8_t *dest_arp, int ifindex)
{
int fd;
@ -148,13 +148,13 @@ int raw_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
packet.udp.len = htons(sizeof(packet.udp) + sizeof(struct dhcpMessage)); /* cheat on the psuedo-header */
packet.ip.tot_len = packet.udp.len;
memcpy(&(packet.data), payload, sizeof(struct dhcpMessage));
packet.udp.check = checksum(&packet, sizeof(struct udp_dhcp_packet));
packet.udp.check = udhcp_checksum(&packet, sizeof(struct udp_dhcp_packet));
packet.ip.tot_len = htons(sizeof(struct udp_dhcp_packet));
packet.ip.ihl = sizeof(packet.ip) >> 2;
packet.ip.version = IPVERSION;
packet.ip.ttl = IPDEFTTL;
packet.ip.check = checksum(&(packet.ip), sizeof(packet.ip));
packet.ip.check = udhcp_checksum(&(packet.ip), sizeof(packet.ip));
result = sendto(fd, &packet, sizeof(struct udp_dhcp_packet), 0, (struct sockaddr *) &dest, sizeof(dest));
if (result <= 0) {
@ -166,7 +166,7 @@ int raw_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
/* Let the kernel do all the work for packet generation */
int kernel_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
int udhcp_kernel_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
uint32_t dest_ip, int dest_port)
{
int n = 1;