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netbios -> netbiosns, added netbiosns_opts.h, added netbiosns_set_name() and netbiosns_stop()

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This commit is contained in:
sg 2015-10-08 22:13:00 +02:00
parent b02bcde8e0
commit a7ee681515
3 changed files with 163 additions and 66 deletions
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135
src/apps/netbiosns/netbiosns.c
View File

@ -1,11 +1,17 @@
/**
* @file
* NetBIOS name service sample
* NetBIOS name service responder
*
* This is an example implementation of a NetBIOS name server.
* It responds to name queries for a configurable name.
* Name resolving is not supported.
*
* Note that the device doesn't broadcast it's own name so can't
* detect duplicate names!
*/
/*
* Redistribution and use in source and binary forms, with or without modification,
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
@ -14,24 +20,24 @@
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
*
*/
#include "lwip/opt.h"
#include "lwip/apps/netbiosns.h"
#if LWIP_IPV4 && LWIP_UDP /* don't build if not configured for use in lwipopts.h */
@ -40,36 +46,6 @@
#include <string.h>
#include "netbios.h"
/** This is an example implementation of a NetBIOS name server.
* It responds to name queries for a configurable name.
* Name resolving is not supported.
*
* Note that the device doesn't broadcast it's own name so can't
* detect duplicate names!
*/
/** NetBIOS name of LWIP device
* This must be uppercase until NETBIOS_STRCMP() is defined to a string
* comparision function that is case insensitive.
* If you want to use the netif's hostname, use this (with LWIP_NETIF_HOSTNAME):
* (ip_current_netif() != NULL ? ip_current_netif()->hostname != NULL ? ip_current_netif()->hostname : "" : "")
*/
#ifndef NETBIOS_LWIP_NAME
#define NETBIOS_LWIP_NAME "NETBIOSLWIPDEV"
#endif
/** Since there's no standard function for case-insensitive string comparision,
* we need another define here:
* define this to stricmp() for windows or strcasecmp() for linux.
* If not defined, comparision is case sensitive and NETBIOS_LWIP_NAME must be
* uppercase
*/
#ifndef NETBIOS_STRCMP
#define NETBIOS_STRCMP(str1, str2) strcmp(str1, str2)
#endif
/** default port number for "NetBIOS Name service */
#define NETBIOS_PORT 137
@ -153,9 +129,18 @@ PACK_STRUCT_END
# include "arch/epstruct.h"
#endif
/** NetBIOS decoding name */
#ifdef NETBIOS_LWIP_NAME
#define NETBIOS_LOCAL_NAME NETBIOS_LWIP_NAME
#else
static char netbiosns_local_name[NETBIOS_NAME_LEN];
#define NETBIOS_LOCAL_NAME netbiosns_local_name
#endif
struct udp_pcb *netbiosns_pcb;
/** Decode a NetBIOS name (from packet to string) */
static int
netbios_name_decoding( char *name_enc, char *name_dec, int name_dec_len)
netbiosns_name_decode(char *name_enc, char *name_dec, int name_dec_len)
{
char *pname;
char cname;
@ -207,15 +192,16 @@ netbios_name_decoding( char *name_enc, char *name_dec, int name_dec_len)
}
#if 0 /* function currently unused */
/** NetBIOS encoding name */
/** Encode a NetBIOS name (from string to packet) - currently unused because
we don't ask for names. */
static int
netbios_name_encoding(char *name_enc, char *name_dec, int name_dec_len)
netbiosns_name_encode(char *name_enc, char *name_dec, int name_dec_len)
{
char *pname;
char cname;
unsigned char ucname;
int idx = 0;
/* Start encoding netbios name. */
pname = name_enc;
@ -259,7 +245,7 @@ netbios_name_encoding(char *name_enc, char *name_dec, int name_dec_len)
/** NetBIOS Name service recv callback */
static void
netbios_recv(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t *addr, u16_t port)
netbiosns_recv(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t *addr, u16_t port)
{
LWIP_UNUSED_ARG(arg);
@ -268,7 +254,7 @@ netbios_recv(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t *a
char netbios_name[NETBIOS_NAME_LEN+1];
struct netbios_hdr* netbios_hdr = (struct netbios_hdr*)p->payload;
struct netbios_name_hdr* netbios_name_hdr = (struct netbios_name_hdr*)(netbios_hdr+1);
/* we only answer if we got a default interface */
if (netif_default != NULL) {
/* @todo: do we need to check answerRRs/authorityRRs/additionalRRs? */
@ -277,9 +263,9 @@ netbios_recv(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t *a
((netbios_hdr->flags & PP_NTOHS(NETB_HFLAG_RESPONSE)) == 0) &&
(netbios_hdr->questions == PP_NTOHS(1))) {
/* decode the NetBIOS name */
netbios_name_decoding( (char*)(netbios_name_hdr->encname), netbios_name, sizeof(netbios_name));
netbiosns_name_decode((char*)(netbios_name_hdr->encname), netbios_name, sizeof(netbios_name));
/* if the packet is for us */
if (NETBIOS_STRCMP(netbios_name, NETBIOS_LWIP_NAME) == 0) {
if (NETBIOS_STRCMP(netbios_name, NETBIOS_LOCAL_NAME) == 0) {
struct pbuf *q;
struct netbios_resp *resp;
@ -310,7 +296,7 @@ netbios_recv(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t *a
/* send the NetBIOS response */
udp_sendto(upcb, q, addr, port);
/* free the "reference" pbuf */
pbuf_free(q);
}
@ -322,18 +308,43 @@ netbios_recv(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t *a
}
}
void netbios_init(void)
void
netbiosns_init(void)
{
struct udp_pcb *pcb;
#ifdef NETBIOS_LWIP_NAME
LWIP_ASSERT("NetBIOS name is too long!", strlen(NETBIOS_LWIP_NAME) < NETBIOS_NAME_LEN);
#endif
pcb = udp_new();
if (pcb != NULL) {
netbiosns_pcb = udp_new();
if (netbiosns_pcb != NULL) {
/* we have to be allowed to send broadcast packets! */
pcb->so_options |= SOF_BROADCAST;
udp_bind(pcb, IP_ADDR_ANY, NETBIOS_PORT);
udp_recv(pcb, netbios_recv, pcb);
netbiosns_pcb->so_options |= SOF_BROADCAST;
udp_bind(netbiosns_pcb, IP_ADDR_ANY, NETBIOS_PORT);
udp_recv(netbiosns_pcb, netbiosns_recv, netbiosns_pcb);
}
}
#ifndef NETBIOS_LWIP_NAME
/* ATTENTION: the hostname must be <= 15 characters! */
void
netbiosns_set_name(const char* hostname)
{
size_t copy_len = strlen(hostname);
LWIP_ASSERT("NetBIOS name is too long!", copy_len < NETBIOS_NAME_LEN);
if(copy_len >= NETBIOS_NAME_LEN) {
copy_len = NETBIOS_NAME_LEN - 1;
}
memcpy(netbiosns_local_name, hostname, copy_len + 1);
}
#endif
void
netbiosns_stop(void)
{
if (netbiosns_pcb != NULL) {
udp_remove(netbiosns_pcb);
netbiosns_pcb = NULL;
}
}
#endif /* LWIP_IPV4 && LWIP_UDP */

41
src/include/lwip/apps/netbiosns.h
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@ -1,6 +1,39 @@
#ifndef LWIP_NETBIOS_H
#define LWIP_NETBIOS_H
/*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
*/
#ifndef LWIP_HDR_NETBIOS_H
#define LWIP_HDR_NETBIOS_H
void netbios_init(void);
#include "lwip/apps/netbiosns_opts.h"
#endif /* LWIP_NETBIOS_H */
void netbiosns_init(void);
#ifndef NETBIOS_LWIP_NAME
/* ATTENTION: the hostname must be <= 15 characters! */
void netbiosns_set_name(const char* hostname);
#endif
void netbiosns_stop(void);
#endif /* LWIP_HDR_NETBIOS_H */

53
src/include/lwip/apps/netbiosns_opts.h Normal file
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@ -0,0 +1,53 @@
/*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
*/
#ifndef LWIP_HDR_NETBIOS_OPTS_H
#define LWIP_HDR_NETBIOS_OPTS_H
#include "lwip/opt.h"
/** Since there's no standard function for case-insensitive string comparision,
* we need another define here:
* define this to stricmp() for windows or strcasecmp() for linux.
* If not defined, comparision is case sensitive and the provided hostname must be
* uppercase.
*/
#ifndef NETBIOS_STRCMP
#define NETBIOS_STRCMP(str1, str2) strcmp(str1, str2)
#endif
/** NetBIOS name of lwip device
* This must be uppercase until NETBIOS_STRCMP() is defined to a string
* comparision function that is case insensitive.
* If you want to use the netif's hostname, use this (with LWIP_NETIF_HOSTNAME):
* (ip_current_netif() != NULL ? ip_current_netif()->hostname != NULL ? ip_current_netif()->hostname : "" : "")
*
* If this is not defined, netbiosns_set_name() can be called at runtime to change the name.
*/
/*#define NETBIOS_LWIP_NAME "NETBIOSLWIPDEV"*/
#endif /* LWIP_HDR_NETBIOS_OPTS_H */