added full udhcp integration

1 files changed, 157 insertions, 0 deletions

diff --git a/networking/udhcp/socket.c b/networking/udhcp/socket.c
new file mode 100644
index 000000000..3a2261561
--- /dev/null
+++ b/networking/udhcp/socket.c
@@ -0,0 +1,157 @@
+/*
+ * socket.c -- DHCP server client/server socket creation
+ *
+ * udhcp client/server
+ * Copyright (C) 1999 Matthew Ramsay <matthewr@moreton.com.au>
+ *                      Chris Trew <ctrew@moreton.com.au>
+ *
+ * Rewrite by Russ Dill <Russ.Dill@asu.edu> July 2001
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+#include <unistd.h>
+#include <string.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#include <errno.h>
+#include <features.h>
+#if __GLIBC__ >=2 && __GLIBC_MINOR >= 1
+#include <netpacket/packet.h>
+#include <net/ethernet.h>
+#else
+#include <asm/types.h>
+#include <linux/if_packet.h>
+#include <linux/if_ether.h>
+#endif
+
+#include "debug.h"
+
+int read_interface(char *interface, int *ifindex, u_int32_t *addr, unsigned char *arp)
+{
+        int fd;
+        struct ifreq ifr;
+        struct sockaddr_in *our_ip;
+
+        memset(&ifr, 0, sizeof(struct ifreq));
+        if((fd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) >= 0) {
+                ifr.ifr_addr.sa_family = AF_INET;
+                strcpy(ifr.ifr_name, interface);
+
+                if (addr) { 
+                        if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
+                                our_ip = (struct sockaddr_in *) &ifr.ifr_addr;
+                                *addr = our_ip->sin_addr.s_addr;
+                                DEBUG(LOG_INFO, "%s (our ip) = %s", ifr.ifr_name, inet_ntoa(our_ip->sin_addr));
+                        } else {
+                                LOG(LOG_ERR, "SIOCGIFADDR failed, is the interface up and configured?: %s", 
+                                                strerror(errno));
+                                return -1;
+                        }
+                }
+                
+                if (ioctl(fd, SIOCGIFINDEX, &ifr) == 0) {
+                        DEBUG(LOG_INFO, "adapter index %d", ifr.ifr_ifindex);
+                        *ifindex = ifr.ifr_ifindex;
+                } else {
+                        LOG(LOG_ERR, "SIOCGIFINDEX failed!: %s", strerror(errno));
+                        return -1;
+                }
+                if (ioctl(fd, SIOCGIFHWADDR, &ifr) == 0) {
+                        memcpy(arp, ifr.ifr_hwaddr.sa_data, 6);
+                        DEBUG(LOG_INFO, "adapter hardware address %02x:%02x:%02x:%02x:%02x:%02x",
+                                arp[0], arp[1], arp[2], arp[3], arp[4], arp[5]);
+                } else {
+                        LOG(LOG_ERR, "SIOCGIFHWADDR failed!: %s", strerror(errno));
+                        return -1;
+                }
+        } else {
+                LOG(LOG_ERR, "socket failed!: %s", strerror(errno));
+                return -1;
+        }
+        close(fd);
+        return 0;
+}
+
+
+int listen_socket(unsigned int ip, int port, char *inf)
+{
+        struct ifreq interface;
+        int fd;
+        struct sockaddr_in addr;
+        int n = 1;
+
+        DEBUG(LOG_INFO, "Opening listen socket on 0x%08x:%d %s\n", ip, port, inf);
+        if ((fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
+                DEBUG(LOG_ERR, "socket call failed: %s", strerror(errno));
+                return -1;
+        }
+        
+        memset(&addr, 0, sizeof(addr));
+        addr.sin_family = AF_INET;
+        addr.sin_port = htons(port);
+        addr.sin_addr.s_addr = ip;
+
+        if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &n, sizeof(n)) == -1) {
+                close(fd);
+                return -1;
+        }
+        if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, (char *) &n, sizeof(n)) == -1) {
+                close(fd);
+                return -1;
+        }
+
+        strncpy(interface.ifr_ifrn.ifrn_name, inf, IFNAMSIZ);
+        if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,(char *)&interface, sizeof(interface)) < 0) {
+                close(fd);
+                return -1;
+        }
+
+        if (bind(fd, (struct sockaddr *)&addr, sizeof(struct sockaddr)) == -1) {
+                close(fd);
+                return -1;
+        }
+        
+        return fd;
+}
+
+
+int raw_socket(int ifindex)
+{
+        int fd;
+        struct sockaddr_ll sock;
+
+        DEBUG(LOG_INFO, "Opening raw socket on ifindex %d\n", ifindex);
+        if ((fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) {
+                DEBUG(LOG_ERR, "socket call failed: %s", strerror(errno));
+                return -1;
+        }
+        
+        sock.sll_family = AF_PACKET;
+        sock.sll_protocol = htons(ETH_P_IP);
+        sock.sll_ifindex = ifindex;
+        if (bind(fd, (struct sockaddr *) &sock, sizeof(sock)) < 0) {
+                DEBUG(LOG_ERR, "bind call failed: %s", strerror(errno));
+                close(fd);
+                return -1;
+        }
+
+        return fd;
+}
+