auto import from //depot/cupcake/@135843

1 files changed, 0 insertions, 239 deletions

diff --git a/libnetutils/packet.c b/libnetutils/packet.c
deleted file mode 100644
index 9388345..0000000
--- a/libnetutils/packet.c
+++ /dev/null
@@ -1,239 +0,0 @@
-/*
- * Copyright 2008, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); 
- * you may not use this file except in compliance with the License. 
- * You may obtain a copy of the License at 
- *
- *     http://www.apache.org/licenses/LICENSE-2.0 
- *
- * Unless required by applicable law or agreed to in writing, software 
- * distributed under the License is distributed on an "AS IS" BASIS, 
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
- * See the License for the specific language governing permissions and 
- * limitations under the License.
- */
-
-#include <stdlib.h>
-#include <unistd.h>
-#include <sys/uio.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netinet/ip.h>
-#include <netinet/udp.h>
-#include <linux/if_packet.h>
-#include <linux/if_ether.h>
-#include <errno.h>
-
-#ifdef ANDROID
-#define LOG_TAG "DHCP"
-#include <cutils/log.h>
-#else
-#include <stdio.h>
-#include <string.h>
-#define LOGD printf
-#define LOGW printf
-#endif
-
-#include "dhcpmsg.h"
-
-int fatal();
-
-int open_raw_socket(const char *ifname, uint8_t *hwaddr, int if_index)
-{
-    int s, flag;
-    struct sockaddr_ll bindaddr;
-
-    if((s = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) {
-        return fatal("socket(PF_PACKET)");
-    }
-
-    memset(&bindaddr, 0, sizeof(bindaddr));
-    bindaddr.sll_family = AF_PACKET;
-    bindaddr.sll_protocol = htons(ETH_P_IP);
-    bindaddr.sll_halen = ETH_ALEN;
-    memcpy(bindaddr.sll_addr, hwaddr, ETH_ALEN);
-    bindaddr.sll_ifindex = if_index;
-
-    if (bind(s, (struct sockaddr *)&bindaddr, sizeof(bindaddr)) < 0) {
-        return fatal("Cannot bind raw socket to interface");
-    }
-
-    return s;
-}
-
-static uint32_t checksum(void *buffer, unsigned int count, uint32_t startsum)
-{
-    uint16_t *up = (uint16_t *)buffer;
-    uint32_t sum = startsum;
-    uint32_t upper16;
-
-    while (count > 1) {
-        sum += *up++;
-        count -= 2;
-    }
-    if (count > 0) {
-        sum += (uint16_t) *(uint8_t *)up;
-    }
-    while ((upper16 = (sum >> 16)) != 0) {
-        sum = (sum & 0xffff) + upper16;
-    }
-    return sum;
-}
-
-static uint32_t finish_sum(uint32_t sum)
-{
-    return ~sum & 0xffff;
-}
-
-int send_packet(int s, int if_index, struct dhcp_msg *msg, int size,
-                uint32_t saddr, uint32_t daddr, uint32_t sport, uint32_t dport)
-{
-    struct iphdr ip;
-    struct udphdr udp;
-    struct iovec iov[3];
-    uint32_t udpsum;
-    uint16_t temp;
-    struct msghdr msghdr;
-    struct sockaddr_ll destaddr;
-
-    ip.version = IPVERSION;
-    ip.ihl = sizeof(ip) >> 2;
-    ip.tos = 0;
-    ip.tot_len = htons(sizeof(ip) + sizeof(udp) + size);
-    ip.id = 0;
-    ip.frag_off = 0;
-    ip.ttl = IPDEFTTL;
-    ip.protocol = IPPROTO_UDP;
-    ip.check = 0;
-    ip.saddr = saddr;
-    ip.daddr = daddr;
-    ip.check = finish_sum(checksum(&ip, sizeof(ip), 0));
-
-    udp.source = htons(sport);
-    udp.dest = htons(dport);
-    udp.len = htons(sizeof(udp) + size);
-    udp.check = 0;
-
-    /* Calculate checksum for pseudo header */
-    udpsum = checksum(&ip.saddr, sizeof(ip.saddr), 0);
-    udpsum = checksum(&ip.daddr, sizeof(ip.daddr), udpsum);
-    temp = htons(IPPROTO_UDP);
-    udpsum = checksum(&temp, sizeof(temp), udpsum);
-    temp = udp.len;
-    udpsum = checksum(&temp, sizeof(temp), udpsum);
-
-    /* Add in the checksum for the udp header */
-    udpsum = checksum(&udp, sizeof(udp), udpsum);
-
-    /* Add in the checksum for the data */
-    udpsum = checksum(msg, size, udpsum);
-    udp.check = finish_sum(udpsum);
-
-    iov[0].iov_base = (char *)&ip;
-    iov[0].iov_len = sizeof(ip);
-    iov[1].iov_base = (char *)&udp;
-    iov[1].iov_len = sizeof(udp);
-    iov[2].iov_base = (char *)msg;
-    iov[2].iov_len = size;
-    memset(&destaddr, 0, sizeof(destaddr));
-    destaddr.sll_family = AF_PACKET;
-    destaddr.sll_protocol = htons(ETH_P_IP);
-    destaddr.sll_ifindex = if_index;
-    destaddr.sll_halen = ETH_ALEN;
-    memcpy(destaddr.sll_addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN);
-
-    msghdr.msg_name = &destaddr;
-    msghdr.msg_namelen = sizeof(destaddr);
-    msghdr.msg_iov = iov;
-    msghdr.msg_iovlen = sizeof(iov) / sizeof(struct iovec);
-    msghdr.msg_flags = 0;
-    msghdr.msg_control = 0;
-    msghdr.msg_controllen = 0;
-    return sendmsg(s, &msghdr, 0);
-}
-
-int receive_packet(int s, struct dhcp_msg *msg)
-{
-    int nread;
-    int is_valid;
-    struct dhcp_packet {
-        struct iphdr ip;
-        struct udphdr udp;
-        struct dhcp_msg dhcp;
-    } packet;
-    int dhcp_size;
-    uint32_t sum;
-    uint16_t temp;
-    uint32_t saddr, daddr;
-
-    nread = read(s, &packet, sizeof(packet));
-    if (nread < 0) {
-        return -1;
-    }
-    /*
-     * The raw packet interface gives us all packets received by the
-     * network interface. We need to filter out all packets that are
-     * not meant for us.
-     */
-    is_valid = 0;
-    if (nread < (int)(sizeof(struct iphdr) + sizeof(struct udphdr))) {
-#if VERBOSE
-        LOGD("Packet is too small (%d) to be a UDP datagram", nread);
-#endif
-    } else if (packet.ip.version != IPVERSION || packet.ip.ihl != (sizeof(packet.ip) >> 2)) {
-#if VERBOSE
-        LOGD("Not a valid IP packet");
-#endif
-    } else if (nread < ntohs(packet.ip.tot_len)) {
-#if VERBOSE
-        LOGD("Packet was truncated (read %d, needed %d)", nread, ntohs(packet.ip.tot_len));
-#endif
-    } else if (packet.ip.protocol != IPPROTO_UDP) {
-#if VERBOSE
-        LOGD("IP protocol (%d) is not UDP", packet.ip.protocol);
-#endif
-    } else if (packet.udp.dest != htons(PORT_BOOTP_CLIENT)) {
-#if VERBOSE
-        LOGD("UDP dest port (%d) is not DHCP client", ntohs(packet.udp.dest));
-#endif
-    } else {
-        is_valid = 1;
-    }
-
-    if (!is_valid) {
-        return -1;
-    }
-
-    /* Seems like it's probably a valid DHCP packet */
-    /* validate IP header checksum */
-    sum = finish_sum(checksum(&packet.ip, sizeof(packet.ip), 0));
-    if (sum != 0) {
-        LOGW("IP header checksum failure (0x%x)", packet.ip.check);
-        return -1;
-    }
-    /*
-     * Validate the UDP checksum.
-     * Since we don't need the IP header anymore, we "borrow" it
-     * to construct the pseudo header used in the checksum calculation.
-     */
-    dhcp_size = ntohs(packet.udp.len) - sizeof(packet.udp);
-    saddr = packet.ip.saddr;
-    daddr = packet.ip.daddr;
-    nread = ntohs(packet.ip.tot_len);
-    memset(&packet.ip, 0, sizeof(packet.ip));
-    packet.ip.saddr = saddr;
-    packet.ip.daddr = daddr;
-    packet.ip.protocol = IPPROTO_UDP;
-    packet.ip.tot_len = packet.udp.len;
-    temp = packet.udp.check;
-    packet.udp.check = 0;
-    sum = finish_sum(checksum(&packet, nread, 0));
-    packet.udp.check = temp;
-    if (temp != sum) {
-        LOGW("UDP header checksum failure (0x%x should be 0x%x)", sum, temp);
-        return -1;
-    }
-    memcpy(msg, &packet.dhcp, dhcp_size);
-    return dhcp_size;
-}