#include <netinet/bootp.h>
#include <sys/systm.h>
#include <sys/malloc.h>
-
+#include <netinet/dhcp_options.h>
#ifdef BOOTP_DEBUG
#define dprintf(x) printf x;
#define IP_CH(ip) ((u_char *)ip)
#define IP_LIST(ip) IP_CH(ip)[0],IP_CH(ip)[1],IP_CH(ip)[2],IP_CH(ip)[3]
-/* tag values (from RFC 2132) */
-#define TAG_PAD 0
-#define TAG_END 255
-#define TAG_SUBNET_MASK 1
-#define TAG_ROUTER 3
-#define RFC_OPTIONS_MAGIC { 99, 130, 83, 99 }
-static unsigned char rfc_magic[4] = RFC_OPTIONS_MAGIC;
-
-
-static struct sockaddr_in blank_sin = { sizeof(struct sockaddr_in),
- AF_INET };
+static __inline__ struct sockaddr_in
+blank_sin()
+{
+ struct sockaddr_in blank = { sizeof(struct sockaddr_in), AF_INET };
+ return (blank);
+}
static __inline__ void
print_reply(struct bootp *bp, int bp_len)
make_bootp_request(struct bootp_packet * pkt,
u_char * hwaddr, u_char hwtype, u_char hwlen)
{
+ char rfc_magic[4] = RFC_OPTIONS_MAGIC;
+
bzero(pkt, sizeof (*pkt));
pkt->bp_ip.ip_v = IPVERSION;
pkt->bp_ip.ip_hl = sizeof (struct ip) >> 2;
+#ifdef RANDOM_IP_ID
+ pkt->bp_ip.ip_id = ip_randomid();
+#else
pkt->bp_ip.ip_id = htons(ip_id++);
+#endif
pkt->bp_ip.ip_ttl = MAXTTL;
pkt->bp_ip.ip_p = IPPROTO_UDP;
pkt->bp_ip.ip_src.s_addr = 0;
pkt->bp_bootp.bp_ciaddr.s_addr = 0;
bcopy(hwaddr, pkt->bp_bootp.bp_chaddr, hwlen);
bcopy(rfc_magic, pkt->bp_bootp.bp_vend, sizeof(rfc_magic));
- pkt->bp_bootp.bp_vend[4] = TAG_END;
+ pkt->bp_bootp.bp_vend[4] = dhcptag_end_e;
pkt->bp_udp.uh_ulen = htons(sizeof(pkt->bp_udp) + sizeof(pkt->bp_bootp));
pkt->bp_ip.ip_len = htons(sizeof(struct ip) + ntohs(pkt->bp_udp.uh_ulen));
pkt->bp_ip.ip_sum = 0;
struct sockaddr_in sin;
/* Address to send to */
- sin = blank_sin;
+ sin = blank_sin();
sin.sin_port = htons(IPPORT_BOOTPS);
sin.sin_addr.s_addr = INADDR_BROADCAST;
m = ip_pkt_to_mbuf((caddr_t)pkt, sizeof(*pkt));
- return (dlil_output((u_long) ifp, m, 0, (struct sockaddr *)&sin, 0));
+ return (dlil_output(ifp->if_data.default_proto, m, 0, (struct sockaddr *)&sin, 0));
}
/*
* Return a received packet or an error if none available.
*/
int
-receive_packet(struct socket * so, caddr_t pp, int psize)
+receive_packet(struct socket * so, caddr_t pp, int psize, int * actual_size)
{
struct iovec aiov;
struct uio auio;
rcvflg = MSG_WAITALL;
error = soreceive(so, (struct sockaddr **) 0, &auio, 0, 0, &rcvflg);
+ *actual_size = psize - auio.uio_resid;
return (error);
}
* Wakeup the process waiting for something on a socket.
*/
static void
-bootp_timeout(struct socket * * socketflag)
+bootp_timeout(void * arg)
{
+ struct socket * * socketflag = (struct socket * *)arg;
struct socket * so = *socketflag;
boolean_t funnel_state;
return;
}
-#define TAG_OFFSET 0
-#define LEN_OFFSET 1
-#define OPTION_OFFSET 2
-
-void *
-packet_option(struct bootp * pkt, u_char t)
-{
- void * buffer = pkt->bp_vend + sizeof(rfc_magic);
- int len;
- unsigned char option_len;
- void * ret = NULL;
- unsigned char * scan;
- unsigned char tag = TAG_PAD;
-
- len = sizeof(pkt->bp_vend) - sizeof(rfc_magic);
- for (scan = buffer; len > 0; ) {
- tag = scan[TAG_OFFSET];
- if (tag == TAG_END) /* we hit the end of the options */
- break;
- if (tag == TAG_PAD) { /* discard pad characters */
- scan++;
- len--;
- }
- else {
- if (t == tag && ret == NULL)
- ret = scan + OPTION_OFFSET;
- option_len = scan[LEN_OFFSET];
- len -= (option_len + 2);
- scan += (option_len + 2);
- }
- }
- if (len < 0 || tag != TAG_END) { /* we ran off the end */
- if (len < 0) {
- dprintf(("bootp: error parsing options\n"));
- }
- else {
- dprintf(("bootp: end tag missing\n"));
- }
- ret = NULL;
- }
- return (ret);
-}
-
/*
* Function: rate_packet
* Purpose:
*/
#define GOOD_RATING 3
static __inline__ int
-rate_packet(struct bootp * pkt)
+rate_packet(struct bootp * pkt, int pkt_size, dhcpol_t * options_p)
{
- int rating = 0;
-
- if (pkt->bp_yiaddr.s_addr) {
- struct in_addr * ip;
+ int len;
+ int rating = 1;
+ if (dhcpol_find(options_p, dhcptag_subnet_mask_e, &len, NULL) != NULL) {
+ rating++;
+ }
+ if (dhcpol_find(options_p, dhcptag_router_e, &len, NULL) != NULL) {
rating++;
- ip = (struct in_addr *)packet_option(pkt, TAG_SUBNET_MASK);
- if (ip)
- rating++;
- ip = (struct in_addr *)packet_option(pkt, TAG_ROUTER);
- if (ip)
- rating++;
}
return (rating);
}
char hwtype = 0;
struct bootp_packet * request = NULL;
struct bootp * reply = NULL;
- struct bootp * saved_reply = NULL;
+ int reply_size = DHCP_PACKET_MIN;
struct timeval start_time;
u_long xid;
int retry;
/* make a request/reply packet */
request = (struct bootp_packet *)kalloc(sizeof(*request));
make_bootp_request(request, hwaddr, hwtype, hwlen);
- reply = (struct bootp *)kalloc(sizeof(*reply));
- saved_reply = (struct bootp *)kalloc(sizeof(*saved_reply));
+ reply = (struct bootp *)kalloc(reply_size);
iaddr_p->s_addr = 0;
printf("bootp: sending request");
for (retry = 0; retry < max_try; retry++) {
timeflag = so;
wait_ticks += random_range(-RAND_TICKS, RAND_TICKS);
dprintf(("bootp: waiting %d ticks\n", wait_ticks));
- timeout(bootp_timeout, &timeflag, wait_ticks);
+ timeout((timeout_fcn_t)bootp_timeout, &timeflag, wait_ticks);
while (TRUE) {
- error = receive_packet(so, (caddr_t)reply, sizeof(*reply));
+ int n = 0;
+
+ error = receive_packet(so, (caddr_t)reply, reply_size, &n);
if (error == 0) {
dprintf(("\nbootp: received packet\n"));
if (ntohl(reply->bp_xid) == xid
&& reply->bp_yiaddr.s_addr
&& bcmp(reply->bp_chaddr, hwaddr, hwlen) == 0) {
- int rating;
+ int rating;
+ dhcpol_t options;
+
#ifdef BOOTP_DEBUG
- print_reply_short(reply, sizeof(*reply));
+ print_reply_short(reply, n);
#endif BOOTP_DEBUG
- rating = rate_packet(reply);
- if (rating > last_rating)
- *saved_reply = *reply;
+ (void)dhcpol_parse_packet(&options, (struct dhcp *)reply,
+ n, NULL);
+ rating = rate_packet(reply, n, &options);
+ if (rating > last_rating) {
+ struct in_addr * ip;
+ int len;
+
+ *iaddr_p = reply->bp_yiaddr;
+ ip = (struct in_addr *)
+ dhcpol_find(&options,
+ dhcptag_subnet_mask_e, &len, NULL);
+ if (ip) {
+ *netmask_p = *ip;
+ }
+ ip = (struct in_addr *)
+ dhcpol_find(&options, dhcptag_router_e, &len, NULL);
+ if (ip) {
+ *router_p = *ip;
+ }
+ printf("%sbootp: got "
+ "response from %s (" IP_FORMAT ")\n",
+ last_rating == 0 ? "\n" : "",
+ reply->bp_sname,
+ IP_LIST(&reply->bp_siaddr));
+ }
+ dhcpol_free(&options);
if (rating >= GOOD_RATING) {
- untimeout(bootp_timeout, &timeflag);
- goto save_values;
+ untimeout((timeout_fcn_t)bootp_timeout, &timeflag);
+ goto done;
}
if (gather_count == 0) {
- untimeout(bootp_timeout, &timeflag);
+ untimeout((timeout_fcn_t)bootp_timeout, &timeflag);
timeflag = so;
- timeout(bootp_timeout, &timeflag,
+ timeout((timeout_fcn_t)bootp_timeout, &timeflag,
hz * GATHER_TIME_SECS);
}
gather_count++;
else if (timeflag == NULL) { /* timed out */
if (gather_count) {
dprintf(("bootp: gathering time has expired"));
- goto save_values; /* we have a packet */
+ goto done; /* we have a packet */
}
break; /* retry */
}
}
if (error && (error != EWOULDBLOCK)) {
dprintf(("bootp: failed to receive packets: %d\n", error));
- untimeout(bootp_timeout, &timeflag);
+ untimeout((timeout_fcn_t)bootp_timeout, &timeflag);
goto cleanup;
}
wait_ticks *= 2;
error = ETIMEDOUT;
goto cleanup;
- save_values:
+ done:
error = 0;
- printf("\nbootp: got response from %s (" IP_FORMAT ")\n",
- saved_reply->bp_sname, IP_LIST(&saved_reply->bp_siaddr));
- /* return the ip address */
- *iaddr_p = saved_reply->bp_yiaddr;
- {
- struct in_addr * ip;
- ip = (struct in_addr *)packet_option(saved_reply, TAG_SUBNET_MASK);
- if (ip)
- *netmask_p = *ip;
- ip = (struct in_addr *)packet_option(saved_reply, TAG_ROUTER);
- if (ip)
- *router_p = *ip;
- }
cleanup:
if (request)
kfree((caddr_t)request, sizeof (*request));
if (reply)
- kfree((caddr_t)reply, sizeof(*reply));
- if (saved_reply)
- kfree((caddr_t)saved_reply, sizeof(*saved_reply));
+ kfree((caddr_t)reply, reply_size);
return (error);
}
/* assign the all-zeroes address */
bzero(&ifr, sizeof(ifr));
sprintf(ifr.ifr_name, "%s%d", ifp->if_name, ifp->if_unit);
- *((struct sockaddr_in *)&ifr.ifr_addr) = blank_sin;
+ *((struct sockaddr_in *)&ifr.ifr_addr) = blank_sin();
error = ifioctl(so, SIOCSIFADDR, (caddr_t)&ifr, procp);
if (error) {
dprintf(("bootp: SIOCSIFADDR all-zeroes IP failed: %d\n",
}
return (error);
}
-
projects / apple / xnu.git / blobdiff