#include <sys/types.h>
#include <sys/socket.h>
#include <features.h>
-#if __GLIBC__ >=2 && __GLIBC_MINOR >= 1
+#if (__GLIBC__ >= 2 && __GLIBC_MINOR >= 1) || defined _NEWLIB_VERSION
#include <netpacket/packet.h>
#include <net/ethernet.h>
#else
#endif
#include <errno.h>
+#include "common.h"
#include "packet.h"
#include "dhcpd.h"
#include "options.h"
-#include "common.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) {
/* 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)
{
- int bytes;
- int i;
- const char broken_vendors[][8] = {
+ static const char broken_vendors[][8] = {
"MSFT 98",
""
};
+ int bytes;
+ int i;
char unsigned *vendor;
memset(packet, 0, sizeof(struct dhcpMessage));
return -2;
}
DEBUG(LOG_INFO, "Received a packet");
-
+
if (packet->op == BOOTREQUEST && (vendor = get_option(packet, DHCP_VENDOR))) {
for (i = 0; broken_vendors[i][0]; i++) {
- if (vendor[OPT_LEN - 2] == (unsigned char) strlen(broken_vendors[i]) &&
- !strncmp(vendor, broken_vendors[i], vendor[OPT_LEN - 2])) {
- DEBUG(LOG_INFO, "broken client (%s), forcing broadcast",
- broken_vendors[i]);
- packet->flags |= htons(BROADCAST_FLAG);
+ if (vendor[OPT_LEN - 2] == (uint8_t) strlen(broken_vendors[i]) &&
+ !strncmp((char*)vendor, broken_vendors[i], vendor[OPT_LEN - 2])) {
+ DEBUG(LOG_INFO, "broken client (%s), forcing broadcast",
+ broken_vendors[i]);
+ packet->flags |= htons(BROADCAST_FLAG);
}
}
}
-
return bytes;
}
-u_int16_t checksum(void *addr, int count)
+uint16_t udhcp_checksum(void *addr, int count)
{
/* Compute Internet Checksum for "count" bytes
* beginning at location "addr".
*/
register int32_t sum = 0;
- u_int16_t *source = (u_int16_t *) addr;
+ uint16_t *source = (uint16_t *) addr;
while (count > 1) {
/* This is the inner loop */
if (count > 0) {
/* Make sure that the left-over byte is added correctly both
* with little and big endian hosts */
- u_int16_t tmp = 0;
- *(unsigned char *) (&tmp) = * (unsigned char *) source;
+ uint16_t tmp = 0;
+ *(uint8_t *) (&tmp) = * (uint8_t *) source;
sum += tmp;
}
/* Fold 32-bit sum to 16 bits */
}
-/* Constuct a ip/udp header for a packet, and specify the source and dest hardware address */
-int raw_packet(struct dhcpMessage *payload, u_int32_t source_ip, int source_port,
- u_int32_t dest_ip, int dest_port, unsigned char *dest_arp, int ifindex)
+/* Construct a ip/udp header for a packet, and specify the source and dest hardware address */
+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;
int result;
DEBUG(LOG_ERR, "socket call failed: %m");
return -1;
}
-
+
memset(&dest, 0, sizeof(dest));
memset(&packet, 0, sizeof(packet));
-
+
dest.sll_family = AF_PACKET;
dest.sll_protocol = htons(ETH_P_IP);
dest.sll_ifindex = ifindex;
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) {
/* Let the kernel do all the work for packet generation */
-int kernel_packet(struct dhcpMessage *payload, u_int32_t source_ip, int source_port,
- u_int32_t dest_ip, int dest_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;
int fd, result;
struct sockaddr_in client;
-
+
if ((fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
return -1;
-
- if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &n, sizeof(n)) == -1)
+
+ if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &n, sizeof(n)) == -1) {
+ close(fd);
return -1;
+ }
memset(&client, 0, sizeof(client));
client.sin_family = AF_INET;
client.sin_port = htons(source_port);
client.sin_addr.s_addr = source_ip;
- if (bind(fd, (struct sockaddr *)&client, sizeof(struct sockaddr)) == -1)
+ if (bind(fd, (struct sockaddr *)&client, sizeof(struct sockaddr)) == -1) {
+ close(fd);
return -1;
+ }
memset(&client, 0, sizeof(client));
client.sin_family = AF_INET;
client.sin_port = htons(dest_port);
- client.sin_addr.s_addr = dest_ip;
+ client.sin_addr.s_addr = dest_ip;
- if (connect(fd, (struct sockaddr *)&client, sizeof(struct sockaddr)) == -1)
+ if (connect(fd, (struct sockaddr *)&client, sizeof(struct sockaddr)) == -1) {
+ close(fd);
return -1;
+ }
result = write(fd, payload, sizeof(struct dhcpMessage));
close(fd);
return result;
-}
+}
projects / oweals / busybox.git / blobdiff