mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-25 08:21:14 +00:00
90 lines
2.9 KiB
Diff
90 lines
2.9 KiB
Diff
Index: busybox-1.7.2/networking/udhcp/packet.c
|
|
===================================================================
|
|
--- busybox-1.7.2.orig/networking/udhcp/packet.c 2007-10-30 15:35:00.000000000 -0500
|
|
+++ busybox-1.7.2/networking/udhcp/packet.c 2007-10-30 15:35:01.000000000 -0500
|
|
@@ -121,6 +121,10 @@
|
|
return ~sum;
|
|
}
|
|
|
|
+int udhcp_get_payload_len(struct dhcpMessage *payload)
|
|
+{
|
|
+ return sizeof(struct dhcpMessage) - MAX_OPTIONS_LEN + end_option(payload->options) + sizeof(payload->options[0]);
|
|
+}
|
|
|
|
/* Construct a ip/udp header for a packet, and specify the source and dest hardware address */
|
|
void BUG_sizeof_struct_udp_dhcp_packet_must_be_576(void);
|
|
@@ -132,6 +136,7 @@
|
|
int result;
|
|
struct sockaddr_ll dest;
|
|
struct udp_dhcp_packet packet;
|
|
+ int p_len = udhcp_get_payload_len(payload);
|
|
|
|
fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP));
|
|
if (fd < 0) {
|
|
@@ -141,6 +146,7 @@
|
|
|
|
memset(&dest, 0, sizeof(dest));
|
|
memset(&packet, 0, sizeof(packet));
|
|
+ memcpy(&(packet.data), payload, p_len);
|
|
|
|
dest.sll_family = AF_PACKET;
|
|
dest.sll_protocol = htons(ETH_P_IP);
|
|
@@ -158,12 +164,13 @@
|
|
packet.ip.daddr = dest_ip;
|
|
packet.udp.source = htons(source_port);
|
|
packet.udp.dest = htons(dest_port);
|
|
- packet.udp.len = htons(sizeof(packet.udp) + sizeof(struct dhcpMessage)); /* cheat on the psuedo-header */
|
|
+ p_len += sizeof(packet.udp);
|
|
+ packet.udp.len = htons(p_len);
|
|
packet.ip.tot_len = packet.udp.len;
|
|
- memcpy(&(packet.data), payload, sizeof(struct dhcpMessage));
|
|
- packet.udp.check = udhcp_checksum(&packet, sizeof(struct udp_dhcp_packet));
|
|
+ p_len += sizeof(packet.ip);
|
|
+ packet.udp.check = udhcp_checksum(&packet, p_len);
|
|
|
|
- packet.ip.tot_len = htons(sizeof(struct udp_dhcp_packet));
|
|
+ packet.ip.tot_len = htons(p_len);
|
|
packet.ip.ihl = sizeof(packet.ip) >> 2;
|
|
packet.ip.version = IPVERSION;
|
|
packet.ip.ttl = IPDEFTTL;
|
|
@@ -172,7 +179,7 @@
|
|
if (sizeof(struct udp_dhcp_packet) != 576)
|
|
BUG_sizeof_struct_udp_dhcp_packet_must_be_576();
|
|
|
|
- result = sendto(fd, &packet, sizeof(struct udp_dhcp_packet), 0,
|
|
+ result = sendto(fd, &packet, p_len, 0,
|
|
(struct sockaddr *) &dest, sizeof(dest));
|
|
if (result <= 0) {
|
|
bb_perror_msg("sendto");
|
|
@@ -216,7 +223,7 @@
|
|
return -1;
|
|
}
|
|
|
|
- result = write(fd, payload, sizeof(struct dhcpMessage));
|
|
+ result = write(fd, payload, udhcp_get_payload_len(payload));
|
|
close(fd);
|
|
return result;
|
|
}
|
|
Index: busybox-1.7.2/networking/udhcp/common.h
|
|
===================================================================
|
|
--- busybox-1.7.2.orig/networking/udhcp/common.h 2007-10-30 15:35:00.000000000 -0500
|
|
+++ busybox-1.7.2/networking/udhcp/common.h 2007-10-30 15:35:01.000000000 -0500
|
|
@@ -21,6 +21,8 @@
|
|
#include <netinet/udp.h>
|
|
#include <netinet/ip.h>
|
|
|
|
+#define MAX_OPTIONS_LEN 308
|
|
+
|
|
struct dhcpMessage {
|
|
uint8_t op;
|
|
uint8_t htype;
|
|
@@ -37,7 +39,7 @@
|
|
uint8_t sname[64];
|
|
uint8_t file[128];
|
|
uint32_t cookie;
|
|
- uint8_t options[308]; /* 312 - cookie */
|
|
+ uint8_t options[MAX_OPTIONS_LEN]; /* 312 - cookie */
|
|
};
|
|
|
|
struct udp_dhcp_packet {
|