/*
* Print bootp requests
*/
void
bootp_print(struct bootp *bp, int length, u_short sport, u_short dport)
{
static char tstr[] = " [|bootp]";
static unsigned char vm_cmu[4] = VM_CMU;
static unsigned char vm_rfc1048[4] = VM_RFC1048;
u_char *ep;
int vdlen;
#define TCHECK(var, l) if ((u_char *)&(var) > ep - l) goto trunc
/* Note funny sized packets */
if (length != sizeof(struct bootp))
(void) printf(" [len=%d]", length);
/* 'ep' points to the end of avaible data. */
ep = (u_char *) snapend;
switch (bp->bp_op) {
case BOOTREQUEST:
/* Usually, a request goes from a client to a server */
if (sport != IPPORT_BOOTPC || dport != IPPORT_BOOTPS)
printf(" (request)");
break;
case BOOTREPLY:
/* Usually, a reply goes from a server to a client */
if (sport != IPPORT_BOOTPS || dport != IPPORT_BOOTPC)
printf(" (reply)");
break;
default:
printf(" bootp-#%d", bp->bp_op);
}
/* The usual hardware address type is 1 (10Mb Ethernet) */
if (bp->bp_htype != 1)
printf(" htype:%d", bp->bp_htype);
/* The usual length for 10Mb Ethernet address is 6 bytes */
if (bp->bp_hlen != 6)
printf(" hlen:%d", bp->bp_hlen);
/* Client's Hardware address */
if (bp->bp_hlen) {
struct ether_header *eh;
char *e;
TCHECK(bp->bp_chaddr[0], 6);
eh = (struct ether_header *) packetp;
if (bp->bp_op == BOOTREQUEST)
e = (char *) ESRC(eh);
else if (bp->bp_op == BOOTREPLY)
e = (char *) EDST(eh);
else
e = NULL;
if (e == NULL || bcmp((char *) bp->bp_chaddr, e, 6))
dump_hex(bp->bp_chaddr, bp->bp_hlen);
}
/* Only print interesting fields */
if (bp->bp_hops)
printf(" hops:%d", bp->bp_hops);
if (bp->bp_xid)
printf(" xid:%ld", (long)ntohl(bp->bp_xid));
if (bp->bp_secs)
printf(" secs:%d", ntohs(bp->bp_secs));
/* Client's ip address */
TCHECK(bp->bp_ciaddr, sizeof(bp->bp_ciaddr));
if (bp->bp_ciaddr.s_addr)
printf(" C:%s", ipaddr_string(&bp->bp_ciaddr));
/* 'your' ip address (bootp client) */
TCHECK(bp->bp_yiaddr, sizeof(bp->bp_yiaddr));
if (bp->bp_yiaddr.s_addr)
printf(" Y:%s", ipaddr_string(&bp->bp_yiaddr));
/* Server's ip address */
TCHECK(bp->bp_siaddr, sizeof(bp->bp_siaddr));
if (bp->bp_siaddr.s_addr)
printf(" S:%s", ipaddr_string(&bp->bp_siaddr));
/* Gateway's ip address */
TCHECK(bp->bp_giaddr, sizeof(bp->bp_giaddr));
if (bp->bp_giaddr.s_addr)
printf(" G:%s", ipaddr_string(&bp->bp_giaddr));
TCHECK(bp->bp_sname[0], sizeof(bp->bp_sname));
if (*bp->bp_sname) {
printf(" sname:");
if (printfn(bp->bp_sname, ep)) {
fputs(tstr + 1, stdout);
return;
}
}
TCHECK(bp->bp_file[0], sizeof(bp->bp_file));
if (*bp->bp_file) {
printf(" file:");
if (printfn(bp->bp_file, ep)) {
fputs(tstr + 1, stdout);
return;
}
}
/* Don't try to decode the vendor buffer unless we're verbose */
if (vflag <= 0)
return;
vdlen = sizeof(bp->bp_vend);
/* Vendor data can extend to the end of the packet. */
if (vdlen < (ep - bp->bp_vend))
vdlen = (ep - bp->bp_vend);
TCHECK(bp->bp_vend[0], vdlen);
printf(" vend");
if (!bcmp(bp->bp_vend, vm_rfc1048, sizeof(u_int32)))
rfc1048_print(bp->bp_vend, vdlen);
else if (!bcmp(bp->bp_vend, vm_cmu, sizeof(u_int32)))
cmu_print(bp->bp_vend, vdlen);
else
other_print(bp->bp_vend, vdlen);
return;
trunc:
fputs(tstr, stdout);
#undef TCHECK
}
/*
* Print bootp requests
*/
void
bootp_print(netdissect_options *ndo,
const u_char *cp, u_int length)
{
const struct bootp *bp;
static const u_char vm_cmu[4] = VM_CMU;
static const u_char vm_rfc1048[4] = VM_RFC1048;
uint8_t bp_op, bp_htype, bp_hlen;
ndo->ndo_protocol = "bootp";
bp = (const struct bootp *)cp;
ND_TCHECK_1(bp->bp_op);
bp_op = EXTRACT_U_1(bp->bp_op);
ND_PRINT("BOOTP/DHCP, %s",
tok2str(bootp_op_values, "unknown (0x%02x)", bp_op));
ND_TCHECK_1(bp->bp_hlen);
bp_htype = EXTRACT_U_1(bp->bp_htype);
bp_hlen = EXTRACT_U_1(bp->bp_hlen);
if (bp_htype == 1 && bp_hlen == 6 && bp_op == BOOTPREQUEST) {
ND_TCHECK_6(bp->bp_chaddr);
ND_PRINT(" from %s", etheraddr_string(ndo, bp->bp_chaddr));
}
ND_PRINT(", length %u", length);
if (!ndo->ndo_vflag)
return;
ND_TCHECK_2(bp->bp_secs);
/* The usual hardware address type is 1 (10Mb Ethernet) */
if (bp_htype != 1)
ND_PRINT(", htype %u", bp_htype);
/* The usual length for 10Mb Ethernet address is 6 bytes */
if (bp_htype != 1 || bp_hlen != 6)
ND_PRINT(", hlen %u", bp_hlen);
/* Only print interesting fields */
if (EXTRACT_U_1(bp->bp_hops))
ND_PRINT(", hops %u", EXTRACT_U_1(bp->bp_hops));
if (EXTRACT_BE_U_4(bp->bp_xid))
ND_PRINT(", xid 0x%x", EXTRACT_BE_U_4(bp->bp_xid));
if (EXTRACT_BE_U_2(bp->bp_secs))
ND_PRINT(", secs %u", EXTRACT_BE_U_2(bp->bp_secs));
ND_TCHECK_2(bp->bp_flags);
ND_PRINT(", Flags [%s]",
bittok2str(bootp_flag_values, "none", EXTRACT_BE_U_2(bp->bp_flags)));
if (ndo->ndo_vflag > 1)
ND_PRINT(" (0x%04x)", EXTRACT_BE_U_2(bp->bp_flags));
/* Client's ip address */
ND_TCHECK_4(bp->bp_ciaddr);
if (EXTRACT_IPV4_TO_NETWORK_ORDER(bp->bp_ciaddr))
ND_PRINT("\n\t Client-IP %s", ipaddr_string(ndo, bp->bp_ciaddr));
/* 'your' ip address (bootp client) */
ND_TCHECK_4(bp->bp_yiaddr);
if (EXTRACT_IPV4_TO_NETWORK_ORDER(bp->bp_yiaddr))
ND_PRINT("\n\t Your-IP %s", ipaddr_string(ndo, bp->bp_yiaddr));
/* Server's ip address */
ND_TCHECK_4(bp->bp_siaddr);
if (EXTRACT_IPV4_TO_NETWORK_ORDER(bp->bp_siaddr))
ND_PRINT("\n\t Server-IP %s", ipaddr_string(ndo, bp->bp_siaddr));
/* Gateway's ip address */
ND_TCHECK_4(bp->bp_giaddr);
if (EXTRACT_IPV4_TO_NETWORK_ORDER(bp->bp_giaddr))
ND_PRINT("\n\t Gateway-IP %s", ipaddr_string(ndo, bp->bp_giaddr));
/* Client's Ethernet address */
if (bp_htype == 1 && bp_hlen == 6) {
ND_TCHECK_6(bp->bp_chaddr);
ND_PRINT("\n\t Client-Ethernet-Address %s", etheraddr_string(ndo, bp->bp_chaddr));
}
ND_TCHECK_1(bp->bp_sname); /* check first char only */
if (EXTRACT_U_1(bp->bp_sname)) {
ND_PRINT("\n\t sname \"");
if (nd_printztn(ndo, bp->bp_sname, (u_int)sizeof(bp->bp_sname),
ndo->ndo_snapend) == 0) {
ND_PRINT("\"");
nd_print_trunc(ndo);
return;
}
ND_PRINT("\"");
}
ND_TCHECK_1(bp->bp_file); /* check first char only */
if (EXTRACT_U_1(bp->bp_file)) {
ND_PRINT("\n\t file \"");
if (nd_printztn(ndo, bp->bp_file, (u_int)sizeof(bp->bp_file),
ndo->ndo_snapend) == 0) {
ND_PRINT("\"");
nd_print_trunc(ndo);
return;
}
ND_PRINT("\"");
}
/* Decode the vendor buffer */
ND_TCHECK_4(bp->bp_vend);
if (memcmp((const char *)bp->bp_vend, vm_rfc1048,
sizeof(uint32_t)) == 0)
rfc1048_print(ndo, bp->bp_vend);
else if (memcmp((const char *)bp->bp_vend, vm_cmu,
sizeof(uint32_t)) == 0)
cmu_print(ndo, bp->bp_vend);
else {
uint32_t ul;
ul = EXTRACT_BE_U_4(bp->bp_vend);
if (ul != 0)
ND_PRINT("\n\t Vendor-#0x%x", ul);
}
return;
trunc:
nd_print_trunc(ndo);
}
/*
* Print bootp requests
*/
void
bootp_print(netdissect_options *ndo,
register const u_char *cp, u_int length)
{
register const struct bootp *bp;
static const u_char vm_cmu[4] = VM_CMU;
static const u_char vm_rfc1048[4] = VM_RFC1048;
bp = (const struct bootp *)cp;
ND_TCHECK(bp->bp_op);
ND_PRINT((ndo, "BOOTP/DHCP, %s",
tok2str(bootp_op_values, "unknown (0x%02x)", bp->bp_op)));
if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
ND_TCHECK2(bp->bp_chaddr[0], 6);
ND_PRINT((ndo, " from %s", etheraddr_string(ndo, bp->bp_chaddr)));
}
ND_PRINT((ndo, ", length %u", length));
if (!ndo->ndo_vflag)
return;
ND_TCHECK(bp->bp_secs);
/* The usual hardware address type is 1 (10Mb Ethernet) */
if (bp->bp_htype != 1)
ND_PRINT((ndo, ", htype %d", bp->bp_htype));
/* The usual length for 10Mb Ethernet address is 6 bytes */
if (bp->bp_htype != 1 || bp->bp_hlen != 6)
ND_PRINT((ndo, ", hlen %d", bp->bp_hlen));
/* Only print interesting fields */
if (bp->bp_hops)
ND_PRINT((ndo, ", hops %d", bp->bp_hops));
if (EXTRACT_32BITS(&bp->bp_xid))
ND_PRINT((ndo, ", xid 0x%x", EXTRACT_32BITS(&bp->bp_xid)));
if (EXTRACT_16BITS(&bp->bp_secs))
ND_PRINT((ndo, ", secs %d", EXTRACT_16BITS(&bp->bp_secs)));
ND_PRINT((ndo, ", Flags [%s]",
bittok2str(bootp_flag_values, "none", EXTRACT_16BITS(&bp->bp_flags))));
if (ndo->ndo_vflag > 1)
ND_PRINT((ndo, " (0x%04x)", EXTRACT_16BITS(&bp->bp_flags)));
/* Client's ip address */
ND_TCHECK(bp->bp_ciaddr);
if (EXTRACT_32BITS(&bp->bp_ciaddr.s_addr))
ND_PRINT((ndo, "\n\t Client-IP %s", ipaddr_string(ndo, &bp->bp_ciaddr)));
/* 'your' ip address (bootp client) */
ND_TCHECK(bp->bp_yiaddr);
if (EXTRACT_32BITS(&bp->bp_yiaddr.s_addr))
ND_PRINT((ndo, "\n\t Your-IP %s", ipaddr_string(ndo, &bp->bp_yiaddr)));
/* Server's ip address */
ND_TCHECK(bp->bp_siaddr);
if (EXTRACT_32BITS(&bp->bp_siaddr.s_addr))
ND_PRINT((ndo, "\n\t Server-IP %s", ipaddr_string(ndo, &bp->bp_siaddr)));
/* Gateway's ip address */
ND_TCHECK(bp->bp_giaddr);
if (EXTRACT_32BITS(&bp->bp_giaddr.s_addr))
ND_PRINT((ndo, "\n\t Gateway-IP %s", ipaddr_string(ndo, &bp->bp_giaddr)));
/* Client's Ethernet address */
if (bp->bp_htype == 1 && bp->bp_hlen == 6) {
ND_TCHECK2(bp->bp_chaddr[0], 6);
ND_PRINT((ndo, "\n\t Client-Ethernet-Address %s", etheraddr_string(ndo, bp->bp_chaddr)));
}
ND_TCHECK2(bp->bp_sname[0], 1); /* check first char only */
if (*bp->bp_sname) {
ND_PRINT((ndo, "\n\t sname \""));
if (fn_print(ndo, bp->bp_sname, ndo->ndo_snapend)) {
ND_PRINT((ndo, "\""));
ND_PRINT((ndo, "%s", tstr + 1));
return;
}
ND_PRINT((ndo, "\""));
}
ND_TCHECK2(bp->bp_file[0], 1); /* check first char only */
if (*bp->bp_file) {
ND_PRINT((ndo, "\n\t file \""));
if (fn_print(ndo, bp->bp_file, ndo->ndo_snapend)) {
ND_PRINT((ndo, "\""));
ND_PRINT((ndo, "%s", tstr + 1));
return;
}
ND_PRINT((ndo, "\""));
}
/* Decode the vendor buffer */
ND_TCHECK(bp->bp_vend[0]);
if (memcmp((const char *)bp->bp_vend, vm_rfc1048,
sizeof(uint32_t)) == 0)
rfc1048_print(ndo, bp->bp_vend);
else if (memcmp((const char *)bp->bp_vend, vm_cmu,
sizeof(uint32_t)) == 0)
cmu_print(ndo, bp->bp_vend);
else {
uint32_t ul;
ul = EXTRACT_32BITS(&bp->bp_vend);
if (ul != 0)
ND_PRINT((ndo, "\n\t Vendor-#0x%x", ul));
}
return;
trunc:
ND_PRINT((ndo, "%s", tstr));
}
/*
* Print bootp requests
*/
void
bootp_print(const u_char *cp, u_int length,
u_short sport, u_short dport)
{
const struct bootp *bp;
static u_char vm_cmu[4] = VM_CMU;
static u_char vm_rfc1048[4] = VM_RFC1048;
bp = (struct bootp *)cp;
TCHECK(bp->bp_op);
switch (bp->bp_op) {
case BOOTREQUEST:
/* Usually, a request goes from a client to a server */
if (sport != IPPORT_BOOTPC || dport != IPPORT_BOOTPS)
printf(" (request)");
break;
case BOOTREPLY:
/* Usually, a reply goes from a server to a client */
if (sport != IPPORT_BOOTPS || dport != IPPORT_BOOTPC)
printf(" (reply)");
break;
default:
printf(" bootp-#%d", bp->bp_op);
}
TCHECK(bp->bp_flags);
/* The usual hardware address type is 1 (10Mb Ethernet) */
if (bp->bp_htype != 1)
printf(" htype-#%d", bp->bp_htype);
/* The usual length for 10Mb Ethernet address is 6 bytes */
if (bp->bp_htype != 1 || bp->bp_hlen != 6)
printf(" hlen:%d", bp->bp_hlen);
/* Only print interesting fields */
if (bp->bp_hops)
printf(" hops:%d", bp->bp_hops);
if (bp->bp_xid)
printf(" xid:0x%x", (u_int32_t)ntohl(bp->bp_xid));
if (bp->bp_secs)
printf(" secs:%d", ntohs(bp->bp_secs));
if (bp->bp_flags)
printf(" flags:0x%x", ntohs(bp->bp_flags));
/* Client's ip address */
TCHECK(bp->bp_ciaddr);
if (bp->bp_ciaddr.s_addr)
printf(" C:%s", ipaddr_string(&bp->bp_ciaddr));
/* 'your' ip address (bootp client) */
TCHECK(bp->bp_yiaddr);
if (bp->bp_yiaddr.s_addr)
printf(" Y:%s", ipaddr_string(&bp->bp_yiaddr));
/* Server's ip address */
TCHECK(bp->bp_siaddr);
if (bp->bp_siaddr.s_addr)
printf(" S:%s", ipaddr_string(&bp->bp_siaddr));
/* Gateway's ip address */
TCHECK(bp->bp_giaddr);
if (bp->bp_giaddr.s_addr)
printf(" G:%s", ipaddr_string(&bp->bp_giaddr));
/* Client's Ethernet address */
if (bp->bp_htype == 1 && bp->bp_hlen == 6) {
const struct ether_header *eh;
const char *e;
TCHECK2(bp->bp_chaddr[0], 6);
eh = (struct ether_header *)packetp;
if (bp->bp_op == BOOTREQUEST)
e = (const char *)ESRC(eh);
else if (bp->bp_op == BOOTREPLY)
e = (const char *)EDST(eh);
else
e = NULL;
if (e == 0 || memcmp((char *)bp->bp_chaddr, e, 6) != 0)
printf(" ether %s", etheraddr_string(bp->bp_chaddr));
}
TCHECK2(bp->bp_sname[0], 1); /* check first char only */
if (*bp->bp_sname) {
printf(" sname \"");
if (fn_print(bp->bp_sname, snapend)) {
putchar('"');
fputs(tstr + 1, stdout);
return;
}
putchar('"');
}
TCHECK2(bp->bp_file[0], 1); /* check first char only */
if (*bp->bp_file) {
printf(" file \"");
if (fn_print(bp->bp_file, snapend)) {
putchar('"');
fputs(tstr + 1, stdout);
return;
}
putchar('"');
}
/* Decode the vendor buffer */
TCHECK2(bp->bp_vend[0], sizeof(u_int32_t));
length -= sizeof(*bp) - sizeof(bp->bp_vend);
if (memcmp((char *)bp->bp_vend, (char *)vm_rfc1048,
sizeof(u_int32_t)) == 0)
rfc1048_print(bp->bp_vend, length);
else if (memcmp((char *)bp->bp_vend, (char *)vm_cmu,
sizeof(u_int32_t)) == 0)
cmu_print(bp->bp_vend, length);
else {
u_int32_t ul;
memcpy((char *)&ul, (char *)bp->bp_vend, sizeof(ul));
if (ul != 0)
printf("vend-#0x%x", ul);
}
return;
trunc:
fputs(tstr, stdout);
}
