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Diff for /ansh/src/utils.c between versions 1.1.1.1.2.2 and 1.1.1.1.2.10

version 1.1.1.1.2.2, 2011/10/10 09:11:48	version 1.1.1.1.2.10, 2011/10/14 09:04:04
Line 5	Line 5
* $Author$	* $Author$
* $Id$	* $Id$
*	*
*************************************************************************/	*************************************************************************
	The ELWIX and AITNET software is distributed under the following
	terms:

	All of the documentation and software included in the ELWIX and AITNET
	Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>

	Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
	by Michael Pounov <misho@elwix.org>. All rights reserved.

	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. All advertising materials mentioning features or use of this software
	must display the following acknowledgement:
	This product includes software developed by Michael Pounov <misho@elwix.org>
	ELWIX - Embedded LightWeight unIX and its contributors.
	4. Neither the name of AITNET nor the names of its contributors
	may be used to endorse or promote products derived from this software
	without specific prior written permission.

	THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
	*/
#include "global.h"	#include "global.h"


Line 29 PrepareL2(const char psDev, int bpflen)	Line 66 PrepareL2(const char psDev, int bpflen)
register int i;	register int i;
char szStr[STRSIZ];	char szStr[STRSIZ];
struct ifreq ifr;	struct ifreq ifr;
	struct bpf_program fcode = { 0 };
	struct bpf_insn insns[] = {
	BPF_STMT(BPF_LD + BPF_H + BPF_ABS, 12),
	BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ANSH_ID, 0, 1),
	BPF_STMT(BPF_RET + BPF_K, -1),
	BPF_STMT(BPF_RET + BPF_K, 0),
	};

FTRACE(3);	FTRACE(3);
assert(psDev);	assert(psDev);

	fcode.bf_len = sizeof(insns) / sizeof(struct bpf_insn);
	fcode.bf_insns = insns;

for (i = 0; i < 10; i++) {	for (i = 0; i < 10; i++) {
memset(szStr, 0, sizeof szStr);	memset(szStr, 0, sizeof szStr);
snprintf(szStr, sizeof szStr, "/dev/bpf%d", i);	snprintf(szStr, sizeof szStr, "/dev/bpf%d", i);
Line 45 PrepareL2(const char psDev, int bpflen)	Line 92 PrepareL2(const char psDev, int bpflen)
return -1;	return -1;
}	}

	if (ioctl(h, BIOCIMMEDIATE, &n) == -1) {
	printf("Error:: set interface %s to bpf #%d - %s\n", psDev, errno, strerror(errno));
	close(h);
	return -1;
	}
	n = USHRT_MAX + 1;
	if (ioctl(h, BIOCSBLEN, &n) == -1) {
	printf("Error:: set buffer interface %s buffer length #%d - %s\n", psDev, errno, strerror(errno));
	close(h);
	return -1;
	}
strlcpy(ifr.ifr_name, psDev, sizeof ifr.ifr_name);	strlcpy(ifr.ifr_name, psDev, sizeof ifr.ifr_name);
if (ioctl(h, BIOCSETIF, &ifr) == -1) {	if (ioctl(h, BIOCSETIF, &ifr) == -1) {
printf("Error:: bind interface %s to bpf #%d - %s\n", psDev, errno, strerror(errno));	printf("Error:: bind interface %s to bpf #%d - %s\n", psDev, errno, strerror(errno));
close(h);	close(h);
return -1;	return -1;
}	}
if (ioctl(h, BIOCIMMEDIATE, &n) == -1) {	if (ioctl(h, BIOCSETF, &fcode) == -1) {
printf("Error:: set interface %s to bpf #%d - %s\n", psDev, errno, strerror(errno));	printf("Error:: set filter interface %s to bpf #%d - %s\n", psDev, errno, strerror(errno));
close(h);	close(h);
return -1;	return -1;
}	}
if (ioctl(h, BIOCGBLEN, bpflen) == -1) {	if (ioctl(h, BIOCGBLEN, bpflen) == -1) {
printf("Error:: get interface %s buffer length #%d - %s\n", psDev, errno, strerror(errno));	printf("Error:: get buffer interface %s buffer length #%d - %s\n", psDev, errno, strerror(errno));
close(h);	close(h);
return -1;	return -1;
}	}

	/*
	n = fcntl(h, F_GETFL);
	fcntl(h, F_SETFL, n \| O_NONBLOCK);
	*/

VERB(3) LOG("Openned device handle %d with bpf buflen %d", h, *bpflen);	VERB(3) LOG("Openned device handle %d with bpf buflen %d", h, *bpflen);
return h;	return h;
}	}
Line 101 PrepareL3(const struct sockaddr sa, int bpflen)	Line 164 PrepareL3(const struct sockaddr sa, int bpflen)
}	}

char	char
icmpRecv(int s, u_short * __restrict id, u_int * __restrict crypted, u_char * __restrict data,	icmpRecv(int s, u_int * __restrict seq, u_short * __restrict id, u_int * __restrict crypted,
int * __restrict datlen, struct sockaddr sa, socklen_t salen)	u_char * __restrict data, int * __restrict datlen, struct sockaddr sa, socklen_t salen)
{	{
int ret = 0;	int ret = 0;
struct icmp *icmp;	struct icmp *icmp;
Line 165 icmpRecv(int s, u_short * __restrict id, u_int * __res	Line 228 icmpRecv(int s, u_short * __restrict id, u_int * __res
memcpy(data, buf + sizeof(struct ip) + sizeof(struct icmp) + sizeof(struct ansh_hdr), *datlen);	memcpy(data, buf + sizeof(struct ip) + sizeof(struct icmp) + sizeof(struct ansh_hdr), *datlen);
}	}

	if (seq)
	*seq = ntohl(hdr->ansh_seq);
if (id)	if (id)
*id = ntohs(icmp->icmp_id);	*id = ntohs(icmp->icmp_id);
return hdr->ansh_flg;	return hdr->ansh_flg;
}	}

int	int
icmpSend(int s, u_short id, char flg, u_int crypted, u_char data, int datlen, struct sockaddr sa, socklen_t salen)	icmpSend(int s, u_int seq, u_short id, char flg, u_int crypted, u_char *data, int datlen,
	struct sockaddr *sa, socklen_t salen)
{	{
u_char *pos, buf[USHRT_MAX] = { 0 };	u_char *pos, buf[USHRT_MAX] = { 0 };
struct icmp *icmp;	struct icmp *icmp;
Line 192 icmpSend(int s, u_short id, char flg, u_int crypted, u	Line 258 icmpSend(int s, u_short id, char flg, u_int crypted, u
hdr->ansh_flg = flg;	hdr->ansh_flg = flg;
hdr->ansh_len = htons(datlen + sizeof(struct ansh_hdr));	hdr->ansh_len = htons(datlen + sizeof(struct ansh_hdr));
hdr->ansh_nonce = htonl(crypted);	hdr->ansh_nonce = htonl(crypted);
	hdr->ansh_seq = htonl(seq);
hdr->ansh_crc = 0;	hdr->ansh_crc = 0;
hdr->ansh_crc = htonl(crcAdler((u_char*) hdr, ntohs(hdr->ansh_len)));	hdr->ansh_crc = htonl(crcAdler((u_char*) hdr, ntohs(hdr->ansh_len)));

Line 210 icmpSend(int s, u_short id, char flg, u_int crypted, u	Line 277 icmpSend(int s, u_short id, char flg, u_int crypted, u
VERB(4) LOG("Put packet with len=%d", ret);	VERB(4) LOG("Put packet with len=%d", ret);
if (ret != sizeof(struct icmp) + sizeof(struct ansh_hdr) + datlen) {	if (ret != sizeof(struct icmp) + sizeof(struct ansh_hdr) + datlen) {
VERB(3) LOG("Sended data %d is different from source data len %d", ret,	VERB(3) LOG("Sended data %d is different from source data len %d", ret,
sizeof(struct icmp) + sizeof(struct ansh_hdr) + datlen);	(int) (sizeof(struct icmp) + sizeof(struct ansh_hdr) + datlen));
return ANSH_FLG_ERR;	return ANSH_FLG_ERR;
}	}

return ret;	return ret;
}	}

int	static int
pktSend(int s, u_short id, char flg, u_int crypted, u_char data, int datlen, struct ether_addr ea)	_pkt_Send(int s, u_int seq, char flg, u_int crypted, u_char data, int datlen, struct io_ether_addr ea)
{	{
u_char *pos, buf[USHRT_MAX] = { 0 };	u_char *pos, buf[USHRT_MAX] = { 0 };
struct ether_header e = (struct ether_header) buf;	struct ether_header e = (struct ether_header) buf;
Line 229 pktSend(int s, u_short id, char flg, u_int crypted, u_	Line 296 pktSend(int s, u_short id, char flg, u_int crypted, u_
if ((sizeof buf - ETHER_HDR_LEN + sizeof(struct ansh_hdr)) < datlen)	if ((sizeof buf - ETHER_HDR_LEN + sizeof(struct ansh_hdr)) < datlen)
return ANSH_FLG_ERR;	return ANSH_FLG_ERR;

e->ether_type = htons(id);	e->ether_type = ntohs(ANSH_ID);
memcpy(e->ether_dhost, ea->octet, ETHER_ADDR_LEN);	memcpy(e->ether_dhost, ea->ether_addr_octet, ETHER_ADDR_LEN);
hdr = (struct ansh_hdr*) (buf + ETHER_HDR_LEN);	hdr = (struct ansh_hdr*) (buf + ETHER_HDR_LEN);
pos = ((u_char*) hdr) + sizeof(struct ansh_hdr);	pos = ((u_char*) hdr) + sizeof(struct ansh_hdr);

Line 240 pktSend(int s, u_short id, char flg, u_int crypted, u_	Line 307 pktSend(int s, u_short id, char flg, u_int crypted, u_
hdr->ansh_flg = flg;	hdr->ansh_flg = flg;
hdr->ansh_len = htons(datlen + sizeof(struct ansh_hdr));	hdr->ansh_len = htons(datlen + sizeof(struct ansh_hdr));
hdr->ansh_nonce = htonl(crypted);	hdr->ansh_nonce = htonl(crypted);
	hdr->ansh_seq = htonl(seq);
hdr->ansh_crc = 0;	hdr->ansh_crc = 0;
hdr->ansh_crc = htonl(crcAdler((u_char*) hdr, ntohs(hdr->ansh_len)));	hdr->ansh_crc = htonl(crcAdler((u_char*) hdr, ntohs(hdr->ansh_len)));

Line 250 pktSend(int s, u_short id, char flg, u_int crypted, u_	Line 318 pktSend(int s, u_short id, char flg, u_int crypted, u_
VERB(4) LOG("Put packet with len=%d", ret);	VERB(4) LOG("Put packet with len=%d", ret);
if (ret != ETHER_HDR_LEN + sizeof(struct ansh_hdr) + datlen) {	if (ret != ETHER_HDR_LEN + sizeof(struct ansh_hdr) + datlen) {
VERB(3) LOG("Sended data %d is different from source data len %d", ret,	VERB(3) LOG("Sended data %d is different from source data len %d", ret,
ETHER_HDR_LEN + sizeof(struct ansh_hdr) + datlen);	(int) (ETHER_HDR_LEN + sizeof(struct ansh_hdr) + datlen));
return ANSH_FLG_ERR;	return ANSH_FLG_ERR;
}	}

return ret;	return ret;
}	}

char	int
pktRecv(int s, u_int * __restrict crypted, u_char * __restrict data, int * __restrict datlen,	pktSend(int s, u_int seq, char flg, u_int crypted, u_char data, int datlen, struct io_ether_addr ea)
struct ether_header *eth)
{	{
int ret = 0;	int wlen, ret = 0;
	u_char *pos = data;

	while (datlen > -1) {
	wlen = _pkt_Send(s, seq, flg, crypted, pos, (datlen > 512) ? 512 : datlen, ea);
	if (wlen == -1)
	return -1;
	else {
	pos += wlen;
	datlen -= wlen;
	ret += wlen;
	}
	}

	return ret;
	}

	static char
	_pkt_Recv(u_char * __restrict buf, int rlen, u_int * __restrict seq, u_int * __restrict crypted,
	u_char * __restrict data, int * __restrict datlen,
	u_char ** __restrict next, int * __restrict nextlen)
	{
	int bias;
struct bpf_hdr *bpf;	struct bpf_hdr *bpf;
struct ether_header *e;
struct ansh_hdr *hdr;	struct ansh_hdr *hdr;
u_char *buf;
u_int crc;	u_int crc;

if (!eth \|\| !datlen)	if (rlen < (sizeof(struct bpf_hdr) + ETHER_HDR_LEN + sizeof(struct ansh_hdr))) {
	VERB(1) LOG("Discard packet too short %d ...", rlen);
return ANSH_FLG_ERR;	return ANSH_FLG_ERR;

if (!(buf = malloc(*datlen))) {
ERR("malloc() #%d - %s", errno, strerror(errno));
return ANSH_FLG_ERR;
}

ret = read(s, buf, *datlen);
if (ret == -1) {
ERR("Receive packet() #%d - %s", errno, strerror(errno));
free(buf);
return ANSH_FLG_ERR;
} else
VERB(4) LOG("Get packet with len=%d", ret);

/* check header len */
if (ret < (sizeof(struct bpf_hdr) + ETHER_HDR_LEN + sizeof(struct ansh_hdr))) {
VERB(1) LOG("Discard packet too short %d ...", ret);
free(buf);
return ANSH_FLG_ERR;
} else {	} else {
bpf = (struct bpf_hdr*) buf;	bpf = (struct bpf_hdr*) buf;
e = (struct ether_header*) (buf + bpf->bh_hdrlen);
memcpy(eth, e, ETHER_HDR_LEN);
hdr = (struct ansh_hdr*) (buf + bpf->bh_hdrlen + ETHER_HDR_LEN);	hdr = (struct ansh_hdr*) (buf + bpf->bh_hdrlen + ETHER_HDR_LEN);
}	}

	/* slice readed data to packets */
	if ((bias = BPF_WORDALIGN(bpf->bh_hdrlen + bpf->bh_caplen)) < rlen) {
	*next = buf + bias;
	*nextlen = rlen - bias;
	} else {
	*next = NULL;
	*nextlen = 0;
	}

/* check version and total size of packet */	/* check version and total size of packet */
if (hdr->ansh_ver != ANSH_VERSION) {	if (hdr->ansh_ver != ANSH_VERSION) {
VERB(3) LOG("Packet with wrong version ... %d", hdr->ansh_ver);	VERB(3) LOG("Packet with wrong version ... %d", hdr->ansh_ver);
free(buf);
return ANSH_FLG_ERR;	return ANSH_FLG_ERR;
}	}
if (crypted) {	if (crypted) {
Line 321 pktRecv(int s, u_int * __restrict crypted, u_char * __	Line 396 pktRecv(int s, u_int * __restrict crypted, u_char * __
hdr->ansh_crc = htonl(crcAdler((u_char*) hdr, ntohs(hdr->ansh_len)));	hdr->ansh_crc = htonl(crcAdler((u_char*) hdr, ntohs(hdr->ansh_len)));
if (crc != hdr->ansh_crc) {	if (crc != hdr->ansh_crc) {
VERB(3) LOG("Packet with wrong crc ...");	VERB(3) LOG("Packet with wrong crc ...");
free(buf);
return ANSH_FLG_ERR;	return ANSH_FLG_ERR;
}	}

/* copy data */	/* select data */
if (data) {	if (data) {
memset(data, 0, *datlen);
*datlen = ntohs(hdr->ansh_len) - sizeof(struct ansh_hdr);	*datlen = ntohs(hdr->ansh_len) - sizeof(struct ansh_hdr);
memcpy(data, hdr + sizeof(struct ansh_hdr), *datlen);	memcpy(data, buf + bpf->bh_hdrlen + ETHER_HDR_LEN + sizeof(struct ansh_hdr), *datlen);
}	}

ret = (char) hdr->ansh_flg;	if (seq)
	*seq = ntohl(hdr->ansh_seq);
	return hdr->ansh_flg;
	}

	char
	pktRecv(int s, u_int * __restrict seq, u_int * __restrict crypted, u_char * __restrict data,
	int * __restrict datlen, struct ether_header *eth)
	{
	u_char buf, next, ptr, pos = data;
	int nextlen, rlen, buflen, ptrlen;
	char flg;
	struct bpf_hdr *bpf;
	struct ether_header *e;

	if (!eth \|\| !data \|\| !datlen)
	return ANSH_FLG_ERR;
	else
	memset(data, 0, *datlen);

	if (!(buf = malloc(*datlen))) {
	ERR("malloc() #%d - %s", errno, strerror(errno));
	return ANSH_FLG_ERR;
	}

	rlen = read(s, buf, *datlen);
	if (rlen == -1) {
	ERR("Receive packet() #%d - %s", errno, strerror(errno));
	free(buf);
	return ANSH_FLG_ERR;
	} else
	VERB(4) LOG("Get packet with len=%d", rlen);

	/* check header len */
	if (rlen < (sizeof(struct bpf_hdr) + ETHER_HDR_LEN + sizeof(struct ansh_hdr))) {
	VERB(1) LOG("Discard packet too short %d ...", rlen);
	free(buf);
	return ANSH_FLG_ERR;
	} else {
	bpf = (struct bpf_hdr*) buf;
	e = (struct ether_header*) (buf + bpf->bh_hdrlen);
	memcpy(eth, e, ETHER_HDR_LEN);
	}

	ptr = next = buf;
	ptrlen = nextlen = rlen;
	if ((flg = _pkt_Recv(ptr, ptrlen, seq, crypted, pos, &buflen, &next, &nextlen)) == -1) {
	free(buf);
	return ANSH_FLG_ERR;
	} else {
	pos += buflen;
	*datlen = buflen;
	ptr = next;
	ptrlen = nextlen;
	}
	/* get additional packets from buffer */
	while (next && nextlen > 0)
	if (_pkt_Recv(ptr, ptrlen, seq, crypted, pos, &buflen, &next, &nextlen) == -1)
	break;
	else {
	pos += buflen;
	*datlen += buflen;
	ptr = next;
	ptrlen = nextlen;
	}

free(buf);	free(buf);
return (char) ret;
	return flg;
}	}

void *	void *
Line 370 cryptBuffer(u_char *buf, int rlen, u_int ctr)	Line 509 cryptBuffer(u_char *buf, int rlen, u_int ctr)
memcpy(ivec + 8, &ctr, sizeof ctr);	memcpy(ivec + 8, &ctr, sizeof ctr);
memcpy(ivec + 12, &rctr, sizeof rctr);	memcpy(ivec + 12, &rctr, sizeof rctr);

if (io_ctr_AES(buf, rlen, &str, (u_char*) "_ansh_ELWIX_", ivec) == -1)	if (io_ctr_AES(buf, rlen, &str, (u_char*) Key, ivec) == -1)
return NULL;	return NULL;

return str;	return str;

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Removed from v.1.1.1.1.2.2
changed lines
	Added in v.1.1.1.1.2.10