mirror of
https://gitlab.isc.org/isc-projects/dhcp
synced 2025-08-31 06:15:55 +00:00
Major rewrite
This commit is contained in:
Ted Lemon
@@ -42,6 +42,9 @@
|
|||||||
#include "dhcpd.h"
|
#include "dhcpd.h"
|
||||||
#include "dhctoken.h"
|
#include "dhctoken.h"
|
||||||
|
|
||||||
|
void do_a_packet (int);
|
||||||
|
void do_a_line (int);
|
||||||
|
|
||||||
TIME cur_time;
|
TIME cur_time;
|
||||||
unsigned char packbuf [65536]; /* Should cover the gnarliest MTU... */
|
unsigned char packbuf [65536]; /* Should cover the gnarliest MTU... */
|
||||||
|
|
||||||
@@ -77,7 +80,7 @@ int main (argc, argv, envp)
|
|||||||
GET_TIME (&cur_time);
|
GET_TIME (&cur_time);
|
||||||
|
|
||||||
name.sin_family = AF_INET;
|
name.sin_family = AF_INET;
|
||||||
name.sin_port = htons (2000);
|
name.sin_port = htons (2001);
|
||||||
name.sin_addr.s_addr = htonl (INADDR_ANY);
|
name.sin_addr.s_addr = htonl (INADDR_ANY);
|
||||||
memset (name.sin_zero, 0, sizeof (name.sin_zero));
|
memset (name.sin_zero, 0, sizeof (name.sin_zero));
|
||||||
|
|
||||||
@@ -99,157 +102,13 @@ int main (argc, argv, envp)
|
|||||||
if (bind (sock, (struct sockaddr *)&name, sizeof name) < 0)
|
if (bind (sock, (struct sockaddr *)&name, sizeof name) < 0)
|
||||||
error ("Can't bind to dhcp address: %m");
|
error ("Can't bind to dhcp address: %m");
|
||||||
|
|
||||||
do {
|
if (fork() > 0) {
|
||||||
fd_set r, w, x;
|
while (1)
|
||||||
FD_ZERO (&r);
|
do_a_packet (sock);
|
||||||
FD_ZERO (&w);
|
} else {
|
||||||
FD_ZERO (&x);
|
while (1)
|
||||||
FD_SET (sock, &r);
|
do_a_line (sock);
|
||||||
FD_SET (sock, &w);
|
}
|
||||||
FD_SET (sock, &x);
|
|
||||||
FD_SET (0, &r); /* stdin */
|
|
||||||
|
|
||||||
if (select (sock + 1, &r, &w, &x, (struct timeval *)0) < 0) {
|
|
||||||
error ("select: %m");
|
|
||||||
}
|
|
||||||
if (FD_ISSET (sock, &r) || FD_ISSET (sock, &w)
|
|
||||||
|| FD_ISSET (sock, &x)) {
|
|
||||||
if ((result =
|
|
||||||
recvfrom (sock, packbuf, sizeof packbuf, 0,
|
|
||||||
(struct sockaddr *)&from, &fromlen))
|
|
||||||
< 0) {
|
|
||||||
warn ("recvfrom failed: %m");
|
|
||||||
sleep (5);
|
|
||||||
continue;
|
|
||||||
}
|
|
||||||
note ("request from %s, port %d",
|
|
||||||
inet_ntoa (from.sin_addr),
|
|
||||||
htons (from.sin_port));
|
|
||||||
ifrom.len = 4;
|
|
||||||
memcpy (ifrom.iabuf, &from.sin_addr, ifrom.len);
|
|
||||||
memcpy (&incoming, packbuf, result);
|
|
||||||
memset (&ip, 0, sizeof ip);
|
|
||||||
ip.raw = &incoming;
|
|
||||||
ip.packet_length = result;
|
|
||||||
ip.client_port = ntohs (from.sin_port);
|
|
||||||
ip.client_addr = ifrom;
|
|
||||||
ip.client_sock = sock;
|
|
||||||
parse_options (&ip);
|
|
||||||
printf ("\nPacket from %s, port %d\n",
|
|
||||||
piaddr (ip.client_addr), ip.client_port);
|
|
||||||
for (i = 0; i < 256; i++)
|
|
||||||
if (ip.options [i].len)
|
|
||||||
printf ("%s = %s;\n",
|
|
||||||
dhcp_options [i].name,
|
|
||||||
pretty_print_option
|
|
||||||
(i,
|
|
||||||
ip.options [i].data,
|
|
||||||
ip.options [i].len));
|
|
||||||
} else if (FD_ISSET (0, &r)) {
|
|
||||||
int bufs = 0;
|
|
||||||
|
|
||||||
/* Parse a packet declaration from stdin, or
|
|
||||||
exit if we've hit EOF. */
|
|
||||||
token = peek_token (&val, cfile);
|
|
||||||
if (token == EOF)
|
|
||||||
break;
|
|
||||||
memset (&decl, 0, sizeof decl);
|
|
||||||
parse_client_statement (cfile, &decl);
|
|
||||||
|
|
||||||
/* Fill in a packet based on the information
|
|
||||||
entered by the user. */
|
|
||||||
memset (&outgoing, 0, sizeof outgoing);
|
|
||||||
memset (&raw, 0, sizeof raw);
|
|
||||||
outgoing.raw = &raw;
|
|
||||||
|
|
||||||
/* Copy in the filename if given; otherwise, flag
|
|
||||||
the filename buffer as available for options. */
|
|
||||||
if (decl.filename)
|
|
||||||
strncpy (raw.file,
|
|
||||||
decl.filename, sizeof raw.file);
|
|
||||||
else
|
|
||||||
bufs |= 1;
|
|
||||||
|
|
||||||
/* Copy in the server name if given; otherwise, flag
|
|
||||||
the server_name buffer as available for options. */
|
|
||||||
if (decl.server_name)
|
|
||||||
strncpy (raw.sname,
|
|
||||||
decl.server_name, sizeof raw.sname);
|
|
||||||
else
|
|
||||||
bufs |= 2;
|
|
||||||
|
|
||||||
if (decl.interface_count) {
|
|
||||||
memcpy (raw.chaddr,
|
|
||||||
decl.interfaces [0].haddr,
|
|
||||||
decl.interfaces [0].hlen);
|
|
||||||
raw.htype = decl.interfaces [0].htype;
|
|
||||||
raw.hlen = decl.interfaces [0].hlen;
|
|
||||||
if (decl.interface_count > 1)
|
|
||||||
note ("Only one interface used.");
|
|
||||||
} else {
|
|
||||||
raw.htype = raw.hlen = 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
cons_options ((struct packet *)0,
|
|
||||||
&outgoing, decl.options, bufs);
|
|
||||||
|
|
||||||
if (decl.ciaddr) {
|
|
||||||
tree_evaluate (decl.ciaddr);
|
|
||||||
memcpy (&raw.ciaddr,
|
|
||||||
decl.ciaddr -> value,
|
|
||||||
decl.ciaddr -> len);
|
|
||||||
} else
|
|
||||||
memset (&raw.ciaddr, 0, sizeof raw.ciaddr);
|
|
||||||
|
|
||||||
if (decl.yiaddr) {
|
|
||||||
tree_evaluate (decl.yiaddr);
|
|
||||||
memcpy (&raw.yiaddr,
|
|
||||||
decl.yiaddr -> value,
|
|
||||||
decl.yiaddr -> len);
|
|
||||||
} else
|
|
||||||
memset (&raw.yiaddr, 0, sizeof raw.yiaddr);
|
|
||||||
|
|
||||||
if (decl.siaddr) {
|
|
||||||
tree_evaluate (decl.siaddr);
|
|
||||||
memcpy (&raw.siaddr,
|
|
||||||
decl.siaddr -> value,
|
|
||||||
decl.siaddr -> len);
|
|
||||||
} else
|
|
||||||
memset (&raw.siaddr, 0, sizeof raw.siaddr);
|
|
||||||
|
|
||||||
if (decl.giaddr) {
|
|
||||||
tree_evaluate (decl.giaddr);
|
|
||||||
memcpy (&raw.giaddr,
|
|
||||||
decl.giaddr -> value,
|
|
||||||
decl.giaddr -> len);
|
|
||||||
} else
|
|
||||||
memset (&raw.giaddr, 0, sizeof raw.giaddr);
|
|
||||||
|
|
||||||
raw.xid = xid++;
|
|
||||||
raw.xid = htons (raw.xid);
|
|
||||||
raw.secs = 0;
|
|
||||||
raw.flags = 0;
|
|
||||||
raw.hops = 0;
|
|
||||||
raw.op = BOOTREQUEST;
|
|
||||||
|
|
||||||
to.sin_port = htons (2001);
|
|
||||||
to.sin_addr.s_addr = INADDR_BROADCAST;
|
|
||||||
to.sin_family = AF_INET;
|
|
||||||
to.sin_len = sizeof to;
|
|
||||||
memset (to.sin_zero, 0, sizeof to.sin_zero);
|
|
||||||
|
|
||||||
note ("Sending dhcp request to %s, port %d",
|
|
||||||
inet_ntoa (to.sin_addr), htons (to.sin_port));
|
|
||||||
|
|
||||||
errno = 0;
|
|
||||||
result = sendto (sock, &raw,
|
|
||||||
outgoing.packet_length,
|
|
||||||
0, (struct sockaddr *)&to, sizeof to);
|
|
||||||
if (result < 0)
|
|
||||||
warn ("sendto: %m");
|
|
||||||
}
|
|
||||||
} while (1);
|
|
||||||
exit (0);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
/* statement :== host_statement */
|
/* statement :== host_statement */
|
||||||
@@ -286,3 +145,158 @@ void parse_client_statement (cfile, decl)
|
|||||||
void cleanup ()
|
void cleanup ()
|
||||||
{
|
{
|
||||||
}
|
}
|
||||||
|
|
||||||
|
void do_a_packet (sock)
|
||||||
|
int sock;
|
||||||
|
{
|
||||||
|
struct sockaddr_in name;
|
||||||
|
int flag;
|
||||||
|
struct dhcp_packet incoming;
|
||||||
|
struct packet ip;
|
||||||
|
struct sockaddr_in from;
|
||||||
|
struct iaddr ifrom;
|
||||||
|
int fromlen = sizeof from;
|
||||||
|
int max = 0;
|
||||||
|
int count;
|
||||||
|
int result;
|
||||||
|
int i;
|
||||||
|
int xid = 1;
|
||||||
|
|
||||||
|
if ((result = recvfrom (sock, packbuf, sizeof packbuf, 0,
|
||||||
|
(struct sockaddr *)&from, &fromlen)) < 0) {
|
||||||
|
warn ("recvfrom failed: %m");
|
||||||
|
sleep (5);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
note ("request from %s, port %d",
|
||||||
|
inet_ntoa (from.sin_addr), htons (from.sin_port));
|
||||||
|
ifrom.len = 4;
|
||||||
|
memcpy (ifrom.iabuf, &from.sin_addr, ifrom.len);
|
||||||
|
memcpy (&incoming, packbuf, result);
|
||||||
|
memset (&ip, 0, sizeof ip);
|
||||||
|
ip.raw = &incoming;
|
||||||
|
ip.packet_length = result;
|
||||||
|
ip.client_port = ntohs (from.sin_port);
|
||||||
|
ip.client_addr = ifrom;
|
||||||
|
ip.client_sock = sock;
|
||||||
|
parse_options (&ip);
|
||||||
|
|
||||||
|
dump_packet (&ip);
|
||||||
|
}
|
||||||
|
|
||||||
|
void do_a_line (sock)
|
||||||
|
int sock;
|
||||||
|
{
|
||||||
|
int bufs = 0;
|
||||||
|
FILE *cfile = stdin;
|
||||||
|
char *val;
|
||||||
|
int flag;
|
||||||
|
int token;
|
||||||
|
struct dhcp_packet raw;
|
||||||
|
struct packet outgoing;
|
||||||
|
struct sockaddr_in to;
|
||||||
|
int max = 0;
|
||||||
|
int count;
|
||||||
|
int result;
|
||||||
|
int i;
|
||||||
|
struct host_decl decl;
|
||||||
|
int xid = 1;
|
||||||
|
|
||||||
|
/* Parse a packet declaration from stdin, or exit if
|
||||||
|
we've hit EOF. */
|
||||||
|
token = peek_token (&val, cfile);
|
||||||
|
if (token == EOF)
|
||||||
|
return;
|
||||||
|
memset (&decl, 0, sizeof decl);
|
||||||
|
parse_client_statement (cfile, &decl);
|
||||||
|
|
||||||
|
/* Fill in a packet based on the information
|
||||||
|
entered by the user. */
|
||||||
|
memset (&outgoing, 0, sizeof outgoing);
|
||||||
|
memset (&raw, 0, sizeof raw);
|
||||||
|
outgoing.raw = &raw;
|
||||||
|
|
||||||
|
/* Copy in the filename if given; otherwise, flag
|
||||||
|
the filename buffer as available for options. */
|
||||||
|
if (decl.filename)
|
||||||
|
strncpy (raw.file,
|
||||||
|
decl.filename, sizeof raw.file);
|
||||||
|
else
|
||||||
|
bufs |= 1;
|
||||||
|
|
||||||
|
/* Copy in the server name if given; otherwise, flag
|
||||||
|
the server_name buffer as available for options. */
|
||||||
|
if (decl.server_name)
|
||||||
|
strncpy (raw.sname,
|
||||||
|
decl.server_name, sizeof raw.sname);
|
||||||
|
else
|
||||||
|
bufs |= 2;
|
||||||
|
|
||||||
|
if (decl.interface_count) {
|
||||||
|
memcpy (raw.chaddr,
|
||||||
|
decl.interfaces [0].haddr,
|
||||||
|
decl.interfaces [0].hlen);
|
||||||
|
raw.htype = decl.interfaces [0].htype;
|
||||||
|
raw.hlen = decl.interfaces [0].hlen;
|
||||||
|
if (decl.interface_count > 1)
|
||||||
|
note ("Only one interface used.");
|
||||||
|
} else {
|
||||||
|
raw.htype = raw.hlen = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
cons_options ((struct packet *)0,
|
||||||
|
&outgoing, decl.options, bufs);
|
||||||
|
|
||||||
|
if (decl.ciaddr) {
|
||||||
|
tree_evaluate (decl.ciaddr);
|
||||||
|
memcpy (&raw.ciaddr, decl.ciaddr -> value, decl.ciaddr -> len);
|
||||||
|
} else
|
||||||
|
memset (&raw.ciaddr, 0, sizeof raw.ciaddr);
|
||||||
|
|
||||||
|
if (decl.yiaddr) {
|
||||||
|
tree_evaluate (decl.yiaddr);
|
||||||
|
memcpy (&raw.yiaddr,
|
||||||
|
decl.yiaddr -> value,
|
||||||
|
decl.yiaddr -> len);
|
||||||
|
} else
|
||||||
|
memset (&raw.yiaddr, 0, sizeof raw.yiaddr);
|
||||||
|
|
||||||
|
if (decl.siaddr) {
|
||||||
|
tree_evaluate (decl.siaddr);
|
||||||
|
memcpy (&raw.siaddr,
|
||||||
|
decl.siaddr -> value,
|
||||||
|
decl.siaddr -> len);
|
||||||
|
} else
|
||||||
|
memset (&raw.siaddr, 0, sizeof raw.siaddr);
|
||||||
|
|
||||||
|
if (decl.giaddr) {
|
||||||
|
tree_evaluate (decl.giaddr);
|
||||||
|
memcpy (&raw.giaddr,
|
||||||
|
decl.giaddr -> value,
|
||||||
|
decl.giaddr -> len);
|
||||||
|
} else
|
||||||
|
memset (&raw.giaddr, 0, sizeof raw.giaddr);
|
||||||
|
|
||||||
|
raw.xid = xid++;
|
||||||
|
raw.xid = htons (raw.xid);
|
||||||
|
raw.secs = 0;
|
||||||
|
raw.flags = 0;
|
||||||
|
raw.hops = 0;
|
||||||
|
raw.op = BOOTREQUEST;
|
||||||
|
|
||||||
|
to.sin_port = htons (2000);
|
||||||
|
to.sin_addr.s_addr = INADDR_BROADCAST;
|
||||||
|
to.sin_family = AF_INET;
|
||||||
|
to.sin_len = sizeof to;
|
||||||
|
memset (to.sin_zero, 0, sizeof to.sin_zero);
|
||||||
|
|
||||||
|
note ("Sending dhcp request to %s, port %d",
|
||||||
|
inet_ntoa (to.sin_addr), htons (to.sin_port));
|
||||||
|
|
||||||
|
errno = 0;
|
||||||
|
result = sendto (sock, &raw,
|
||||||
|
outgoing.packet_length,
|
||||||
|
0, (struct sockaddr *)&to, sizeof to);
|
||||||
|
if (result < 0)
|
||||||
|
warn ("sendto: %m");
|
||||||
|
}
|
||||||
|
|||||||
318
dhclient.c
318
dhclient.c
@@ -42,6 +42,9 @@
|
|||||||
#include "dhcpd.h"
|
#include "dhcpd.h"
|
||||||
#include "dhctoken.h"
|
#include "dhctoken.h"
|
||||||
|
|
||||||
|
void do_a_packet (int);
|
||||||
|
void do_a_line (int);
|
||||||
|
|
||||||
TIME cur_time;
|
TIME cur_time;
|
||||||
unsigned char packbuf [65536]; /* Should cover the gnarliest MTU... */
|
unsigned char packbuf [65536]; /* Should cover the gnarliest MTU... */
|
||||||
|
|
||||||
@@ -77,7 +80,7 @@ int main (argc, argv, envp)
|
|||||||
GET_TIME (&cur_time);
|
GET_TIME (&cur_time);
|
||||||
|
|
||||||
name.sin_family = AF_INET;
|
name.sin_family = AF_INET;
|
||||||
name.sin_port = htons (2000);
|
name.sin_port = htons (2001);
|
||||||
name.sin_addr.s_addr = htonl (INADDR_ANY);
|
name.sin_addr.s_addr = htonl (INADDR_ANY);
|
||||||
memset (name.sin_zero, 0, sizeof (name.sin_zero));
|
memset (name.sin_zero, 0, sizeof (name.sin_zero));
|
||||||
|
|
||||||
@@ -99,157 +102,13 @@ int main (argc, argv, envp)
|
|||||||
if (bind (sock, (struct sockaddr *)&name, sizeof name) < 0)
|
if (bind (sock, (struct sockaddr *)&name, sizeof name) < 0)
|
||||||
error ("Can't bind to dhcp address: %m");
|
error ("Can't bind to dhcp address: %m");
|
||||||
|
|
||||||
do {
|
if (fork() > 0) {
|
||||||
fd_set r, w, x;
|
while (1)
|
||||||
FD_ZERO (&r);
|
do_a_packet (sock);
|
||||||
FD_ZERO (&w);
|
} else {
|
||||||
FD_ZERO (&x);
|
while (1)
|
||||||
FD_SET (sock, &r);
|
do_a_line (sock);
|
||||||
FD_SET (sock, &w);
|
}
|
||||||
FD_SET (sock, &x);
|
|
||||||
FD_SET (0, &r); /* stdin */
|
|
||||||
|
|
||||||
if (select (sock + 1, &r, &w, &x, (struct timeval *)0) < 0) {
|
|
||||||
error ("select: %m");
|
|
||||||
}
|
|
||||||
if (FD_ISSET (sock, &r) || FD_ISSET (sock, &w)
|
|
||||||
|| FD_ISSET (sock, &x)) {
|
|
||||||
if ((result =
|
|
||||||
recvfrom (sock, packbuf, sizeof packbuf, 0,
|
|
||||||
(struct sockaddr *)&from, &fromlen))
|
|
||||||
< 0) {
|
|
||||||
warn ("recvfrom failed: %m");
|
|
||||||
sleep (5);
|
|
||||||
continue;
|
|
||||||
}
|
|
||||||
note ("request from %s, port %d",
|
|
||||||
inet_ntoa (from.sin_addr),
|
|
||||||
htons (from.sin_port));
|
|
||||||
ifrom.len = 4;
|
|
||||||
memcpy (ifrom.iabuf, &from.sin_addr, ifrom.len);
|
|
||||||
memcpy (&incoming, packbuf, result);
|
|
||||||
memset (&ip, 0, sizeof ip);
|
|
||||||
ip.raw = &incoming;
|
|
||||||
ip.packet_length = result;
|
|
||||||
ip.client_port = ntohs (from.sin_port);
|
|
||||||
ip.client_addr = ifrom;
|
|
||||||
ip.client_sock = sock;
|
|
||||||
parse_options (&ip);
|
|
||||||
printf ("\nPacket from %s, port %d\n",
|
|
||||||
piaddr (ip.client_addr), ip.client_port);
|
|
||||||
for (i = 0; i < 256; i++)
|
|
||||||
if (ip.options [i].len)
|
|
||||||
printf ("%s = %s;\n",
|
|
||||||
dhcp_options [i].name,
|
|
||||||
pretty_print_option
|
|
||||||
(i,
|
|
||||||
ip.options [i].data,
|
|
||||||
ip.options [i].len));
|
|
||||||
} else if (FD_ISSET (0, &r)) {
|
|
||||||
int bufs = 0;
|
|
||||||
|
|
||||||
/* Parse a packet declaration from stdin, or
|
|
||||||
exit if we've hit EOF. */
|
|
||||||
token = peek_token (&val, cfile);
|
|
||||||
if (token == EOF)
|
|
||||||
break;
|
|
||||||
memset (&decl, 0, sizeof decl);
|
|
||||||
parse_client_statement (cfile, &decl);
|
|
||||||
|
|
||||||
/* Fill in a packet based on the information
|
|
||||||
entered by the user. */
|
|
||||||
memset (&outgoing, 0, sizeof outgoing);
|
|
||||||
memset (&raw, 0, sizeof raw);
|
|
||||||
outgoing.raw = &raw;
|
|
||||||
|
|
||||||
/* Copy in the filename if given; otherwise, flag
|
|
||||||
the filename buffer as available for options. */
|
|
||||||
if (decl.filename)
|
|
||||||
strncpy (raw.file,
|
|
||||||
decl.filename, sizeof raw.file);
|
|
||||||
else
|
|
||||||
bufs |= 1;
|
|
||||||
|
|
||||||
/* Copy in the server name if given; otherwise, flag
|
|
||||||
the server_name buffer as available for options. */
|
|
||||||
if (decl.server_name)
|
|
||||||
strncpy (raw.sname,
|
|
||||||
decl.server_name, sizeof raw.sname);
|
|
||||||
else
|
|
||||||
bufs |= 2;
|
|
||||||
|
|
||||||
if (decl.interface_count) {
|
|
||||||
memcpy (raw.chaddr,
|
|
||||||
decl.interfaces [0].haddr,
|
|
||||||
decl.interfaces [0].hlen);
|
|
||||||
raw.htype = decl.interfaces [0].htype;
|
|
||||||
raw.hlen = decl.interfaces [0].hlen;
|
|
||||||
if (decl.interface_count > 1)
|
|
||||||
note ("Only one interface used.");
|
|
||||||
} else {
|
|
||||||
raw.htype = raw.hlen = 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
cons_options ((struct packet *)0,
|
|
||||||
&outgoing, decl.options, bufs);
|
|
||||||
|
|
||||||
if (decl.ciaddr) {
|
|
||||||
tree_evaluate (decl.ciaddr);
|
|
||||||
memcpy (&raw.ciaddr,
|
|
||||||
decl.ciaddr -> value,
|
|
||||||
decl.ciaddr -> len);
|
|
||||||
} else
|
|
||||||
memset (&raw.ciaddr, 0, sizeof raw.ciaddr);
|
|
||||||
|
|
||||||
if (decl.yiaddr) {
|
|
||||||
tree_evaluate (decl.yiaddr);
|
|
||||||
memcpy (&raw.yiaddr,
|
|
||||||
decl.yiaddr -> value,
|
|
||||||
decl.yiaddr -> len);
|
|
||||||
} else
|
|
||||||
memset (&raw.yiaddr, 0, sizeof raw.yiaddr);
|
|
||||||
|
|
||||||
if (decl.siaddr) {
|
|
||||||
tree_evaluate (decl.siaddr);
|
|
||||||
memcpy (&raw.siaddr,
|
|
||||||
decl.siaddr -> value,
|
|
||||||
decl.siaddr -> len);
|
|
||||||
} else
|
|
||||||
memset (&raw.siaddr, 0, sizeof raw.siaddr);
|
|
||||||
|
|
||||||
if (decl.giaddr) {
|
|
||||||
tree_evaluate (decl.giaddr);
|
|
||||||
memcpy (&raw.giaddr,
|
|
||||||
decl.giaddr -> value,
|
|
||||||
decl.giaddr -> len);
|
|
||||||
} else
|
|
||||||
memset (&raw.giaddr, 0, sizeof raw.giaddr);
|
|
||||||
|
|
||||||
raw.xid = xid++;
|
|
||||||
raw.xid = htons (raw.xid);
|
|
||||||
raw.secs = 0;
|
|
||||||
raw.flags = 0;
|
|
||||||
raw.hops = 0;
|
|
||||||
raw.op = BOOTREQUEST;
|
|
||||||
|
|
||||||
to.sin_port = htons (2001);
|
|
||||||
to.sin_addr.s_addr = INADDR_BROADCAST;
|
|
||||||
to.sin_family = AF_INET;
|
|
||||||
to.sin_len = sizeof to;
|
|
||||||
memset (to.sin_zero, 0, sizeof to.sin_zero);
|
|
||||||
|
|
||||||
note ("Sending dhcp request to %s, port %d",
|
|
||||||
inet_ntoa (to.sin_addr), htons (to.sin_port));
|
|
||||||
|
|
||||||
errno = 0;
|
|
||||||
result = sendto (sock, &raw,
|
|
||||||
outgoing.packet_length,
|
|
||||||
0, (struct sockaddr *)&to, sizeof to);
|
|
||||||
if (result < 0)
|
|
||||||
warn ("sendto: %m");
|
|
||||||
}
|
|
||||||
} while (1);
|
|
||||||
exit (0);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
/* statement :== host_statement */
|
/* statement :== host_statement */
|
||||||
@@ -286,3 +145,158 @@ void parse_client_statement (cfile, decl)
|
|||||||
void cleanup ()
|
void cleanup ()
|
||||||
{
|
{
|
||||||
}
|
}
|
||||||
|
|
||||||
|
void do_a_packet (sock)
|
||||||
|
int sock;
|
||||||
|
{
|
||||||
|
struct sockaddr_in name;
|
||||||
|
int flag;
|
||||||
|
struct dhcp_packet incoming;
|
||||||
|
struct packet ip;
|
||||||
|
struct sockaddr_in from;
|
||||||
|
struct iaddr ifrom;
|
||||||
|
int fromlen = sizeof from;
|
||||||
|
int max = 0;
|
||||||
|
int count;
|
||||||
|
int result;
|
||||||
|
int i;
|
||||||
|
int xid = 1;
|
||||||
|
|
||||||
|
if ((result = recvfrom (sock, packbuf, sizeof packbuf, 0,
|
||||||
|
(struct sockaddr *)&from, &fromlen)) < 0) {
|
||||||
|
warn ("recvfrom failed: %m");
|
||||||
|
sleep (5);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
note ("request from %s, port %d",
|
||||||
|
inet_ntoa (from.sin_addr), htons (from.sin_port));
|
||||||
|
ifrom.len = 4;
|
||||||
|
memcpy (ifrom.iabuf, &from.sin_addr, ifrom.len);
|
||||||
|
memcpy (&incoming, packbuf, result);
|
||||||
|
memset (&ip, 0, sizeof ip);
|
||||||
|
ip.raw = &incoming;
|
||||||
|
ip.packet_length = result;
|
||||||
|
ip.client_port = ntohs (from.sin_port);
|
||||||
|
ip.client_addr = ifrom;
|
||||||
|
ip.client_sock = sock;
|
||||||
|
parse_options (&ip);
|
||||||
|
|
||||||
|
dump_packet (&ip);
|
||||||
|
}
|
||||||
|
|
||||||
|
void do_a_line (sock)
|
||||||
|
int sock;
|
||||||
|
{
|
||||||
|
int bufs = 0;
|
||||||
|
FILE *cfile = stdin;
|
||||||
|
char *val;
|
||||||
|
int flag;
|
||||||
|
int token;
|
||||||
|
struct dhcp_packet raw;
|
||||||
|
struct packet outgoing;
|
||||||
|
struct sockaddr_in to;
|
||||||
|
int max = 0;
|
||||||
|
int count;
|
||||||
|
int result;
|
||||||
|
int i;
|
||||||
|
struct host_decl decl;
|
||||||
|
int xid = 1;
|
||||||
|
|
||||||
|
/* Parse a packet declaration from stdin, or exit if
|
||||||
|
we've hit EOF. */
|
||||||
|
token = peek_token (&val, cfile);
|
||||||
|
if (token == EOF)
|
||||||
|
return;
|
||||||
|
memset (&decl, 0, sizeof decl);
|
||||||
|
parse_client_statement (cfile, &decl);
|
||||||
|
|
||||||
|
/* Fill in a packet based on the information
|
||||||
|
entered by the user. */
|
||||||
|
memset (&outgoing, 0, sizeof outgoing);
|
||||||
|
memset (&raw, 0, sizeof raw);
|
||||||
|
outgoing.raw = &raw;
|
||||||
|
|
||||||
|
/* Copy in the filename if given; otherwise, flag
|
||||||
|
the filename buffer as available for options. */
|
||||||
|
if (decl.filename)
|
||||||
|
strncpy (raw.file,
|
||||||
|
decl.filename, sizeof raw.file);
|
||||||
|
else
|
||||||
|
bufs |= 1;
|
||||||
|
|
||||||
|
/* Copy in the server name if given; otherwise, flag
|
||||||
|
the server_name buffer as available for options. */
|
||||||
|
if (decl.server_name)
|
||||||
|
strncpy (raw.sname,
|
||||||
|
decl.server_name, sizeof raw.sname);
|
||||||
|
else
|
||||||
|
bufs |= 2;
|
||||||
|
|
||||||
|
if (decl.interface_count) {
|
||||||
|
memcpy (raw.chaddr,
|
||||||
|
decl.interfaces [0].haddr,
|
||||||
|
decl.interfaces [0].hlen);
|
||||||
|
raw.htype = decl.interfaces [0].htype;
|
||||||
|
raw.hlen = decl.interfaces [0].hlen;
|
||||||
|
if (decl.interface_count > 1)
|
||||||
|
note ("Only one interface used.");
|
||||||
|
} else {
|
||||||
|
raw.htype = raw.hlen = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
cons_options ((struct packet *)0,
|
||||||
|
&outgoing, decl.options, bufs);
|
||||||
|
|
||||||
|
if (decl.ciaddr) {
|
||||||
|
tree_evaluate (decl.ciaddr);
|
||||||
|
memcpy (&raw.ciaddr, decl.ciaddr -> value, decl.ciaddr -> len);
|
||||||
|
} else
|
||||||
|
memset (&raw.ciaddr, 0, sizeof raw.ciaddr);
|
||||||
|
|
||||||
|
if (decl.yiaddr) {
|
||||||
|
tree_evaluate (decl.yiaddr);
|
||||||
|
memcpy (&raw.yiaddr,
|
||||||
|
decl.yiaddr -> value,
|
||||||
|
decl.yiaddr -> len);
|
||||||
|
} else
|
||||||
|
memset (&raw.yiaddr, 0, sizeof raw.yiaddr);
|
||||||
|
|
||||||
|
if (decl.siaddr) {
|
||||||
|
tree_evaluate (decl.siaddr);
|
||||||
|
memcpy (&raw.siaddr,
|
||||||
|
decl.siaddr -> value,
|
||||||
|
decl.siaddr -> len);
|
||||||
|
} else
|
||||||
|
memset (&raw.siaddr, 0, sizeof raw.siaddr);
|
||||||
|
|
||||||
|
if (decl.giaddr) {
|
||||||
|
tree_evaluate (decl.giaddr);
|
||||||
|
memcpy (&raw.giaddr,
|
||||||
|
decl.giaddr -> value,
|
||||||
|
decl.giaddr -> len);
|
||||||
|
} else
|
||||||
|
memset (&raw.giaddr, 0, sizeof raw.giaddr);
|
||||||
|
|
||||||
|
raw.xid = xid++;
|
||||||
|
raw.xid = htons (raw.xid);
|
||||||
|
raw.secs = 0;
|
||||||
|
raw.flags = 0;
|
||||||
|
raw.hops = 0;
|
||||||
|
raw.op = BOOTREQUEST;
|
||||||
|
|
||||||
|
to.sin_port = htons (2000);
|
||||||
|
to.sin_addr.s_addr = INADDR_BROADCAST;
|
||||||
|
to.sin_family = AF_INET;
|
||||||
|
to.sin_len = sizeof to;
|
||||||
|
memset (to.sin_zero, 0, sizeof to.sin_zero);
|
||||||
|
|
||||||
|
note ("Sending dhcp request to %s, port %d",
|
||||||
|
inet_ntoa (to.sin_addr), htons (to.sin_port));
|
||||||
|
|
||||||
|
errno = 0;
|
||||||
|
result = sendto (sock, &raw,
|
||||||
|
outgoing.packet_length,
|
||||||
|
0, (struct sockaddr *)&to, sizeof to);
|
||||||
|
if (result < 0)
|
||||||
|
warn ("sendto: %m");
|
||||||
|
}
|
||||||
|
|||||||
Reference in New Issue
Block a user