diff options
| -rw-r--r-- | net/net.c | 20 |
1 files changed, 7 insertions, 13 deletions
@@ -1271,7 +1271,7 @@ void net_process_received_packet(uchar *in_packet, int len) #ifdef CONFIG_UDP_CHECKSUM if (ip->udp_xsum != 0) { ulong xsum; - ushort *sumptr; + u8 *sumptr; ushort sumlen; xsum = ip->ip_p; @@ -1282,22 +1282,16 @@ void net_process_received_packet(uchar *in_packet, int len) xsum += (ntohl(ip->ip_dst.s_addr) >> 0) & 0x0000ffff; sumlen = ntohs(ip->udp_len); - sumptr = (ushort *)&(ip->udp_src); + sumptr = (u8 *)&ip->udp_src; while (sumlen > 1) { - ushort sumdata; - - sumdata = *sumptr++; - xsum += ntohs(sumdata); + /* inlined ntohs() to avoid alignment errors */ + xsum += (sumptr[0] << 8) + sumptr[1]; + sumptr += 2; sumlen -= 2; } - if (sumlen > 0) { - ushort sumdata; - - sumdata = *(unsigned char *)sumptr; - sumdata = (sumdata << 8) & 0xff00; - xsum += sumdata; - } + if (sumlen > 0) + xsum += (sumptr[0] << 8) + sumptr[0]; while ((xsum >> 16) != 0) { xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff); |