brcm47xx: backport patch from kernel 2.6.37

[openwrt.git] / package / busybox / patches / 241-udhcpc-oversized_packets.patch

diff --git a/package/busybox/patches/241-udhcpc-oversized_packets.patch b/package/busybox/patches/241-udhcpc-oversized_packets.patch
index b810752..ef9e7f4 100644 (file)
--- a/package/busybox/patches/241-udhcpc-oversized_packets.patch
+++ b/package/busybox/patches/241-udhcpc-oversized_packets.patch
@@ -12,7 +12,7 @@
  /* Construct a ip/udp header for a packet, send packet */
  int FAST_FUNC udhcp_send_raw_packet(struct dhcp_packet *dhcp_pkt,
                uint32_t source_nip, int source_port,
-@@ -173,11 +178,12 @@ int FAST_FUNC udhcp_send_raw_packet(stru
+@@ -173,10 +178,10 @@ int FAST_FUNC udhcp_send_raw_packet(stru
  {
        struct sockaddr_ll dest_sll;
        struct ip_udp_dhcp_packet packet;
@@ -20,27 +20,36 @@
        int fd;
        int result = -1;
        const char *msg;
- 
 +      int p_len = udhcp_get_payload_len(dhcp_pkt);
-+
+ 
        fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP));
        if (fd < 0) {
-               msg = "socket(%s)";
-@@ -186,7 +192,7 @@ int FAST_FUNC udhcp_send_raw_packet(stru
+@@ -185,8 +190,8 @@ int FAST_FUNC udhcp_send_raw_packet(stru
+       }
  
        memset(&dest_sll, 0, sizeof(dest_sll));
-       memset(&packet, 0, offsetof(struct ip_udp_dhcp_packet, data));
+-      memset(&packet, 0, offsetof(struct ip_udp_dhcp_packet, data));
 -      packet.data = *dhcp_pkt; /* struct copy */
++      memset(&packet, 0, sizeof(packet));
 +      memcpy(&(packet.data), dhcp_pkt, p_len);
  
        dest_sll.sll_family = AF_PACKET;
        dest_sll.sll_protocol = htons(ETH_P_IP);
-@@ -208,27 +214,25 @@ int FAST_FUNC udhcp_send_raw_packet(stru
-        * In order to work with those buggy servers,
-        * we truncate packets after end option byte.
-        */
--      padding = DHCP_OPTIONS_BUFSIZE - 1 - udhcp_end_option(packet.data.options);
+@@ -199,36 +204,24 @@ int FAST_FUNC udhcp_send_raw_packet(stru
+               goto ret_close;
+       }
  
+-      /* We were sending full-sized DHCP packets (zero padded),
+-       * but some badly configured servers were seen dropping them.
+-       * Apparently they drop all DHCP packets >576 *ethernet* octets big,
+-       * whereas they may only drop packets >576 *IP* octets big
+-       * (which for typical Ethernet II means 590 octets: 6+6+2 + 576).
+-       *
+-       * In order to work with those buggy servers,
+-       * we truncate packets after end option byte.
+-       */
+-      padding = DHCP_OPTIONS_BUFSIZE - 1 - udhcp_end_option(packet.data.options);
+-
        packet.ip.protocol = IPPROTO_UDP;
        packet.ip.saddr = source_nip;
        packet.ip.daddr = dest_nip;
@@ -65,11 +74,11 @@
  
        udhcp_dump_packet(dhcp_pkt);
 -      result = sendto(fd, &packet, IP_UPD_DHCP_SIZE - padding, /*flags:*/ 0,
-+      result = sendto(fd, &packet, p_len, 0,
++      result = sendto(fd, &packet, p_len, /*flags:*/ 0,
                        (struct sockaddr *) &dest_sll, sizeof(dest_sll));
        msg = "sendto";
   ret_close:
-@@ -246,7 +250,6 @@ int FAST_FUNC udhcp_send_kernel_packet(s
+@@ -246,7 +239,6 @@ int FAST_FUNC udhcp_send_kernel_packet(s
                uint32_t dest_nip, int dest_port)
  {
        struct sockaddr_in client;
@@ -77,10 +86,11 @@
        int fd;
        int result = -1;
        const char *msg;
-@@ -278,8 +281,7 @@ int FAST_FUNC udhcp_send_kernel_packet(s
+@@ -277,9 +269,7 @@ int FAST_FUNC udhcp_send_kernel_packet(s
+       }
  
        udhcp_dump_packet(dhcp_pkt);
- 
+-
 -      padding = DHCP_OPTIONS_BUFSIZE - 1 - udhcp_end_option(dhcp_pkt->options);
 -      result = safe_write(fd, dhcp_pkt, DHCP_SIZE - padding);
 +      result = safe_write(fd, dhcp_pkt, udhcp_get_payload_len(dhcp_pkt));