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00042 #include "dhcpd.h"
00043
00044 #if defined (USE_RAW_SEND)
00045 #include <sys/uio.h>
00046
00047
00048 void if_register_send (info)
00049 struct interface_info *info;
00050 {
00051 struct sockaddr_in name;
00052 int sock;
00053 struct socklist *tmp;
00054 int flag;
00055
00056
00057 name.sin_family = AF_INET;
00058 name.sin_port = local_port;
00059 name.sin_addr.s_addr = htonl (INADDR_BROADCAST);
00060 memset (name.sin_zero, 0, sizeof (name.sin_zero));
00061
00062
00063 if (!quiet_interface_discovery)
00064 log_info ("Sending on %s, port %d",
00065 piaddr (info -> address), htons (local_port));
00066 if ((sock = socket (AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0)
00067 log_fatal ("Can't create dhcp socket: %m");
00068
00069
00070 flag = 1;
00071 if (setsockopt (sock, SOL_SOCKET, SO_BROADCAST,
00072 &flag, sizeof flag) < 0)
00073 log_fatal ("Can't set SO_BROADCAST option on dhcp socket: %m");
00074
00075
00076
00077 if (setsockopt (sock, IPPROTO_IP, IP_HDRINCL, &flag, sizeof flag) < 0)
00078 log_fatal ("Can't set IP_HDRINCL flag: %m");
00079
00080 info -> wfdesc = sock;
00081 if (!quiet_interface_discovery)
00082 log_info ("Sending on Raw/%s%s%s",
00083 info -> name,
00084 (info -> shared_network ? "/" : ""),
00085 (info -> shared_network ?
00086 info -> shared_network -> name : ""));
00087 }
00088
00089 void if_deregister_send (info)
00090 struct interface_info *info;
00091 {
00092 close (info -> wfdesc);
00093 info -> wfdesc = -1;
00094
00095 if (!quiet_interface_discovery)
00096 log_info ("Disabling output on Raw/%s%s%s",
00097 info -> name,
00098 (info -> shared_network ? "/" : ""),
00099 (info -> shared_network ?
00100 info -> shared_network -> name : ""));
00101 }
00102
00103 size_t send_packet (interface, packet, raw, len, from, to, hto)
00104 struct interface_info *interface;
00105 struct packet *packet;
00106 struct dhcp_packet *raw;
00107 size_t len;
00108 struct in_addr from;
00109 struct sockaddr_in *to;
00110 struct hardware *hto;
00111 {
00112 unsigned char buf [256];
00113 int bufp = 0;
00114 struct iovec iov [2];
00115 int result;
00116
00117
00118 assemble_udp_ip_header (interface, buf, &bufp, from.s_addr,
00119 to -> sin_addr.s_addr, to -> sin_port,
00120 (unsigned char *)raw, len);
00121
00122
00123 iov [0].iov_base = (char *)buf;
00124 iov [0].iov_len = bufp;
00125 iov [1].iov_base = (char *)raw;
00126 iov [1].iov_len = len;
00127
00128 result = writev(interface -> wfdesc, iov, 2);
00129 if (result < 0)
00130 log_error ("send_packet: %m");
00131 return result;
00132 }
00133 #endif