add back in udhcp support

1 files changed, 135 insertions, 0 deletions

diff --git a/networking/udhcp/socket.c b/networking/udhcp/socket.c
new file mode 100644
index 0000000..6417267
--- /dev/null
+++ b/networking/udhcp/socket.c
@@ -0,0 +1,135 @@
+/*
+ * 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) || defined _NEWLIB_VERSION
+#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 "common.h"
+#include "socket.h"
+
+int read_interface(char *interface, int *ifindex, uint32_t *addr, uint8_t *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?: %m");
+				close(fd);
+				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!: %m");
+			close(fd);
+			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!: %m");
+			close(fd);
+			return -1;
+		}
+	} else {
+		LOG(LOG_ERR, "socket failed!: %m");
+		return -1;
+	}
+	close(fd);
+	return 0;
+}
+
+
+int listen_socket(uint32_t 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", ip, port, inf);
+	if ((fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
+		DEBUG(LOG_ERR, "socket call failed: %m");
+		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_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;
+}