Merge branch 'upstream' into debian

[mech_eap.git] / libeap / src / ap / dhcp_snoop.c

diff --git a/libeap/src/ap/dhcp_snoop.c b/libeap/src/ap/dhcp_snoop.c
deleted file mode 100644 (file)
index f0212fb..0000000
--- a/libeap/src/ap/dhcp_snoop.c
+++ /dev/null
@@ -1,179 +0,0 @@
-/*
- * DHCP snooping for Proxy ARP
- * Copyright (c) 2014, Qualcomm Atheros, Inc.
- *
- * This software may be distributed under the terms of the BSD license.
- * See README for more details.
- */
-
-#include "utils/includes.h"
-#include <netinet/ip.h>
-#include <netinet/udp.h>
-
-#include "utils/common.h"
-#include "l2_packet/l2_packet.h"
-#include "hostapd.h"
-#include "sta_info.h"
-#include "ap_drv_ops.h"
-#include "x_snoop.h"
-#include "dhcp_snoop.h"
-
-struct bootp_pkt {
-       struct iphdr iph;
-       struct udphdr udph;
-       u8 op;
-       u8 htype;
-       u8 hlen;
-       u8 hops;
-       be32 xid;
-       be16 secs;
-       be16 flags;
-       be32 client_ip;
-       be32 your_ip;
-       be32 server_ip;
-       be32 relay_ip;
-       u8 hw_addr[16];
-       u8 serv_name[64];
-       u8 boot_file[128];
-       u8 exten[312];
-} STRUCT_PACKED;
-
-#define DHCPACK        5
-static const u8 ic_bootp_cookie[] = { 99, 130, 83, 99 };
-
-
-static const char * ipaddr_str(u32 addr)
-{
-       static char buf[17];
-
-       os_snprintf(buf, sizeof(buf), "%u.%u.%u.%u",
-                   (addr >> 24) & 0xff, (addr >> 16) & 0xff,
-                   (addr >> 8) & 0xff, addr & 0xff);
-       return buf;
-}
-
-
-static void handle_dhcp(void *ctx, const u8 *src_addr, const u8 *buf,
-                       size_t len)
-{
-       struct hostapd_data *hapd = ctx;
-       const struct bootp_pkt *b;
-       struct sta_info *sta;
-       int exten_len;
-       const u8 *end, *pos;
-       int res, msgtype = 0, prefixlen = 32;
-       u32 subnet_mask = 0;
-       u16 tot_len;
-
-       exten_len = len - ETH_HLEN - (sizeof(*b) - sizeof(b->exten));
-       if (exten_len < 4)
-               return;
-
-       b = (const struct bootp_pkt *) &buf[ETH_HLEN];
-       tot_len = ntohs(b->iph.tot_len);
-       if (tot_len > (unsigned int) (len - ETH_HLEN))
-               return;
-
-       if (os_memcmp(b->exten, ic_bootp_cookie, ARRAY_SIZE(ic_bootp_cookie)))
-               return;
-
-       /* Parse DHCP options */
-       end = (const u8 *) b + tot_len;
-       pos = &b->exten[4];
-       while (pos < end && *pos != 0xff) {
-               const u8 *opt = pos++;
-
-               if (*opt == 0) /* padding */
-                       continue;
-
-               pos += *pos + 1;
-               if (pos >= end)
-                       break;
-
-               switch (*opt) {
-               case 1:  /* subnet mask */
-                       if (opt[1] == 4)
-                               subnet_mask = WPA_GET_BE32(&opt[2]);
-                       if (subnet_mask == 0)
-                               return;
-                       while (!(subnet_mask & 0x1)) {
-                               subnet_mask >>= 1;
-                               prefixlen--;
-                       }
-                       break;
-               case 53: /* message type */
-                       if (opt[1])
-                               msgtype = opt[2];
-                       break;
-               default:
-                       break;
-               }
-       }
-
-       if (msgtype == DHCPACK) {
-               if (b->your_ip == 0)
-                       return;
-
-               /* DHCPACK for DHCPREQUEST */
-               sta = ap_get_sta(hapd, b->hw_addr);
-               if (!sta)
-                       return;
-
-               wpa_printf(MSG_DEBUG, "dhcp_snoop: Found DHCPACK for " MACSTR
-                          " @ IPv4 address %s/%d",
-                          MAC2STR(sta->addr),
-                          ipaddr_str(be_to_host32(b->your_ip)),
-                          prefixlen);
-
-               if (sta->ipaddr == b->your_ip)
-                       return;
-
-               if (sta->ipaddr != 0) {
-                       wpa_printf(MSG_DEBUG,
-                                  "dhcp_snoop: Removing IPv4 address %s from the ip neigh table",
-                                  ipaddr_str(be_to_host32(sta->ipaddr)));
-                       hostapd_drv_br_delete_ip_neigh(hapd, 4,
-                                                      (u8 *) &sta->ipaddr);
-               }
-
-               res = hostapd_drv_br_add_ip_neigh(hapd, 4, (u8 *) &b->your_ip,
-                                                 prefixlen, sta->addr);
-               if (res) {
-                       wpa_printf(MSG_DEBUG,
-                                  "dhcp_snoop: Adding ip neigh table failed: %d",
-                                  res);
-                       return;
-               }
-               sta->ipaddr = b->your_ip;
-       }
-
-       if (hapd->conf->disable_dgaf && is_broadcast_ether_addr(buf)) {
-               for (sta = hapd->sta_list; sta; sta = sta->next) {
-                       if (!(sta->flags & WLAN_STA_AUTHORIZED))
-                               continue;
-                       x_snoop_mcast_to_ucast_convert_send(hapd, sta,
-                                                           (u8 *) buf, len);
-               }
-       }
-}
-
-
-int dhcp_snoop_init(struct hostapd_data *hapd)
-{
-       hapd->sock_dhcp = x_snoop_get_l2_packet(hapd, handle_dhcp,
-                                               L2_PACKET_FILTER_DHCP);
-       if (hapd->sock_dhcp == NULL) {
-               wpa_printf(MSG_DEBUG,
-                          "dhcp_snoop: Failed to initialize L2 packet processing for DHCP packet: %s",
-                          strerror(errno));
-               return -1;
-       }
-
-       return 0;
-}
-
-
-void dhcp_snoop_deinit(struct hostapd_data *hapd)
-{
-       l2_packet_deinit(hapd->sock_dhcp);
-}