16 void FAST_FUNC udhcp_init_header(struct dhcp_packet *packet, char type)  in udhcp_init_header()  argument
18 	memset(packet, 0, sizeof(*packet));  in udhcp_init_header()
19 	packet->op = BOOTREQUEST; /* if client to a server */  in udhcp_init_header()
24 		packet->op = BOOTREPLY; /* if server to client */  in udhcp_init_header()
26 	packet->htype = 1; /* ethernet */  in udhcp_init_header()
27 	packet->hlen = 6;  in udhcp_init_header()
28 	packet->cookie = htonl(DHCP_MAGIC);  in udhcp_init_header()
30 		packet->options[0] = DHCP_END;  in udhcp_init_header()
31 	udhcp_add_simple_option(packet, DHCP_MESSAGE_TYPE, type);  in udhcp_init_header()
36 void FAST_FUNC udhcp_dump_packet(struct dhcp_packet *packet)  in udhcp_dump_packet()  argument
38 	char buf[sizeof(packet->chaddr)*2 + 1];  in udhcp_dump_packet()
61 		, packet->hlen  in udhcp_dump_packet()
63 		, packet->xid  in udhcp_dump_packet()
66 		, packet->ciaddr  in udhcp_dump_packet()
67 		, packet->yiaddr  in udhcp_dump_packet()
68 		, packet->siaddr_nip  in udhcp_dump_packet()
69 		, packet->gateway_nip  in udhcp_dump_packet()
75 	*bin2hex(buf, (void *) packet->chaddr, sizeof(packet->chaddr)) = '\0';  in udhcp_dump_packet()
81 int FAST_FUNC udhcp_recv_kernel_packet(struct dhcp_packet *packet, int fd)  in udhcp_recv_kernel_packet()  argument
85 	memset(packet, 0, sizeof(*packet));  in udhcp_recv_kernel_packet()
86 	bytes = safe_read(fd, packet, sizeof(*packet));  in udhcp_recv_kernel_packet()
93 	 || packet->cookie != htonl(DHCP_MAGIC)  in udhcp_recv_kernel_packet()
100 	udhcp_dump_packet(packet);  in udhcp_recv_kernel_packet()
112 	struct ip_udp_dhcp_packet packet;  in udhcp_send_raw_packet()  local
125 	memset(&packet, 0, offsetof(struct ip_udp_dhcp_packet, data));  in udhcp_send_raw_packet()
126 	packet.data = *dhcp_pkt; /* struct copy */  in udhcp_send_raw_packet()
155 	padding = DHCP_OPTIONS_BUFSIZE - 1 - udhcp_end_option(packet.data.options);  in udhcp_send_raw_packet()
159 	packet.ip.protocol = IPPROTO_UDP;  in udhcp_send_raw_packet()
160 	packet.ip.saddr = source_nip;  in udhcp_send_raw_packet()
161 	packet.ip.daddr = dest_nip;  in udhcp_send_raw_packet()
162 	packet.udp.source = htons(source_port);  in udhcp_send_raw_packet()
163 	packet.udp.dest = htons(dest_port);  in udhcp_send_raw_packet()
165 	packet.udp.len = htons(UDP_DHCP_SIZE - padding);  in udhcp_send_raw_packet()
167 	packet.ip.tot_len = packet.udp.len;  in udhcp_send_raw_packet()
168 	packet.udp.check = inet_cksum(&packet,  in udhcp_send_raw_packet()
171 	packet.ip.tot_len = htons(IP_UDP_DHCP_SIZE - padding);  in udhcp_send_raw_packet()
172 	packet.ip.ihl = sizeof(packet.ip) >> 2;  in udhcp_send_raw_packet()
173 	packet.ip.version = IPVERSION;  in udhcp_send_raw_packet()
174 	packet.ip.ttl = IPDEFTTL;  in udhcp_send_raw_packet()
175 	packet.ip.check = inet_cksum(&packet.ip, sizeof(packet.ip));  in udhcp_send_raw_packet()
178 	result = sendto(fd, &packet, IP_UDP_DHCP_SIZE - padding, /*flags:*/ 0,  in udhcp_send_raw_packet()