diff options
| -rw-r--r-- | package/busybox/patches/241-udhcpc-oversized_packets.patch | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/package/busybox/patches/241-udhcpc-oversized_packets.patch b/package/busybox/patches/241-udhcpc-oversized_packets.patch new file mode 100644 index 000000000..d041bf5c3 --- /dev/null +++ b/package/busybox/patches/241-udhcpc-oversized_packets.patch @@ -0,0 +1,85 @@ +diff -ruN busybox-1.2.1-old/networking/udhcp/packet.c busybox-1.2.1-new/networking/udhcp/packet.c +--- busybox-1.2.1-old/networking/udhcp/packet.c 2006-07-01 00:42:02.000000000 +0200 ++++ busybox-1.2.1-new/networking/udhcp/packet.c 2006-11-19 01:04:40.000000000 +0100 +@@ -111,6 +111,10 @@ + 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 */ + int udhcp_raw_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port, +@@ -120,6 +124,7 @@ + int result; + struct sockaddr_ll dest; + struct udp_dhcp_packet packet; ++ int p_len = udhcp_get_payload_len(payload); + + if ((fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) { + DEBUG(LOG_ERR, "socket call failed: %m"); +@@ -128,6 +133,7 @@ + + 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); +@@ -145,18 +151,19 @@ + 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; + 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)); ++ result = sendto(fd, &packet, p_len, 0, (struct sockaddr *) &dest, sizeof(dest)); + if (result <= 0) { + DEBUG(LOG_ERR, "write on socket failed: %m"); + } +@@ -201,7 +208,7 @@ + return -1; + } + +- result = write(fd, payload, sizeof(struct dhcpMessage)); ++ result = write(fd, payload, udhcp_get_payload_len(payload)); + close(fd); + return result; + } +diff -ruN busybox-1.2.1-old/networking/udhcp/packet.h busybox-1.2.1-new/networking/udhcp/packet.h +--- busybox-1.2.1-old/networking/udhcp/packet.h 2006-07-01 00:42:02.000000000 +0200 ++++ busybox-1.2.1-new/networking/udhcp/packet.h 2006-11-19 00:49:38.000000000 +0100 +@@ -4,6 +4,8 @@ + #include <netinet/udp.h> + #include <netinet/ip.h> + ++#define MAX_OPTIONS_LEN 308 ++ + struct dhcpMessage { + uint8_t op; + uint8_t htype; +@@ -20,7 +22,7 @@ + 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 { |