X-Git-Url: http://rtime.felk.cvut.cz/gitweb/can-eth-gw.git/blobdiff_plain/7050a3d312c33d88ff213905c4b15eb6d6bb4e5c..dce17269d3f87a7d632e735b0d72d887e8974ae2:/utils/cegw/cegw.c

diff --git a/utils/cegw/cegw.c b/utils/cegw/cegw.c
deleted file mode 100644
index 67953fe..0000000
--- a/utils/cegw/cegw.c
+++ /dev/null
@@ -1,278 +0,0 @@
-/*
- * Copyright: (c) 2012 Czech Technical University in Prague
- *
- * Authors:
- *	Radek Matějka <radek.matejka@gmail.com>
- *	Michal Sojka  <sojkam1@fel.cvut.cz>
- *
- * Funded by: Volkswagen Group Research
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/socket.h>
-#include <netdb.h>
-#include <net/if.h>
-#include <arpa/inet.h>
-#include <linux/can.h>
-#include <limits.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <linux/can/raw.h>
-#include <linux/can/canethgw.h>
-
-unsigned int cegw_errno = 0;
-
-static const char help_msg[] = "usage:\n"
-			       "	%s <can_if>[,filter]* <udp_listen_addr>:<port> <udp_dest_addr>:<port>\n"
-			       "		[list of additional udp recipients <addr>:<port>]\n"
-			       "example:\n"
-			       "	%s can0 192.168.0.1:10501 192.168.0.4:980 192.168.0.7:1160\n\n"
-			       "	Executing this command will set the gateway so that it will\n"
-			       "	listen for udp messages on 192.168.0.1:10501 and send them\n"
-			       "	to can0. Simultaneously, it will send all messages from can0\n"
-			       "	to 192.168.0.4:980 and 192.168.0.7:1160 via udp. The message is\n"
-			       "	therefore cloned. Notice that there can be more udp recipients.\n"
-			       "	The can filter is specified in the same way as in candump utility.\n";
-
-struct addrinfo hints = {
-	.ai_socktype = SOCK_DGRAM
-};
-
-/**
- * readsockaddr - parses @in for eth address.
- * Valid input is e.g. 127.0.0.1:10502. If parsing fails
- * the cause is stored in cegw_errno. Please note that
- * the function modifies content of arg.
- *
- * @param[in]  arg   hostname:port string
- * @param[out] addr  filled sockaddr_in structure
- * @return 0 on success, -1 otherwise
- */
-int readsockaddr(char *arg, struct sockaddr *addr, int ai_family)
-{
-	int ret;
-	char *delim;
-	struct addrinfo *res;
-
-	delim = strchr(arg, ':');
-
-	if (delim == NULL) {
-		fprintf(stderr, "expected ':' (<hostname>:<port>)");
-		exit(1);
-	}
-
-	*delim = '\0';
-	delim++;
-
-	hints.ai_family = ai_family;
-
-	ret = getaddrinfo(arg, delim, &hints, &res);
-	if (ret != 0) {
-		fprintf(stderr, "getaddrinfo failed: %s\n", gai_strerror(ret));
-		exit(1);
-	}
-
-	memcpy(addr, res->ai_addr, res->ai_addrlen);
-
-	freeaddrinfo(res);
-	return 0;
-}
-
-/**
- * readfilter - reads can filter definition from nptr
- */
-int readfilter(char *nptr, struct can_filter **filter, int *out_numfilter, can_err_mask_t *err_mask)
-{
-	char *ptr;
-	int numfilter;
-	struct can_filter *rfilter;
-
-	numfilter = 0;
-	ptr = nptr;
-	while (ptr) {
-		numfilter++;
-		ptr++; /* hop behind the ',' */
-		ptr = strchr(ptr, ','); /* exit condition */
-	}
-
-	rfilter = malloc(numfilter * sizeof(*rfilter));
-	if (!rfilter) {
-		fprintf(stderr, "filter malloc failed");
-		exit(1);
-	}
-
-	numfilter = 0;
-	*err_mask = 0;
-
-	while (nptr) {
-
-		ptr = nptr+1; /* hop behind the ',' */
-		nptr = strchr(ptr, ','); /* update exit condition */
-
-		if (sscanf(ptr, "%x:%x",
-					&rfilter[numfilter].can_id,
-					&rfilter[numfilter].can_mask) == 2) {
-			rfilter[numfilter].can_mask &= ~CAN_ERR_FLAG;
-			numfilter++;
-		} else if (sscanf(ptr, "%x~%x",
-					&rfilter[numfilter].can_id,
-					&rfilter[numfilter].can_mask) == 2) {
-			rfilter[numfilter].can_id |= CAN_INV_FILTER;
-			rfilter[numfilter].can_mask &= ~CAN_ERR_FLAG;
-			numfilter++;
-		} else if (sscanf(ptr, "#%x", err_mask) != 1) {
-			fprintf(stderr, "filter parsing failed");
-			exit(1);
-		}
-	}
-
-	*filter = rfilter;
-	*out_numfilter = numfilter;
-	return 0;
-}
-
-int main(int argc, char *argv[])
-{
-	int i;
-	int fd;
-	int tmpi;
-	int dstcnt;
-	char *nptr;
-	int numfilter = 0;
-	int udp_sock, can_sock;
-	int addrlen;
-	can_err_mask_t err_mask = 0;
-	struct sockaddr_can can_addr;
-	struct sockaddr *dst = NULL;
-	struct cegw_ioctl *gwctl = NULL;
-	struct can_filter *filter = NULL;
-
-	/* udp_addr can store both - in and in6 addresses */
-	struct sockaddr_in6 udp6_addr;
-	struct sockaddr *udp_addr = (struct sockaddr *) &udp6_addr;
-
-
-	if (argc == 1 || (argc == 2 && strcmp(argv[1], "-h") == 0)) {
-		printf(help_msg, argv[0], argv[0]);
-		return 0;
-	}
-
-	if (argc < 4) {
-		fprintf(stderr, "not enough arguments\n");
-		printf(help_msg, argv[0], argv[0]);
-		return 1;
-	}
-
-	dstcnt = argc-3;
-
-	for (i=1; i<argc; i++) {
-		switch (i) {
-			case 1: /* can ifindex */
-				nptr = strchr(argv[i], ',');
-				if (nptr) {
-					*nptr = '\0';
-				}
-
-				can_addr.can_family = AF_CAN;
-				tmpi = if_nametoindex(argv[i]);
-				if (tmpi == 0) {
-					fprintf(stderr, "given can interface not found\n");
-					return 1;
-				}
-
-				can_addr.can_ifindex = tmpi;
-				break;
-			case 2: /* listen addr */
-				readsockaddr(argv[i], udp_addr, AF_UNSPEC);
-				switch (udp_addr->sa_family) {
-					case AF_INET:
-						addrlen = sizeof(struct sockaddr_in);
-						break;
-					case AF_INET6:
-						addrlen = sizeof(struct sockaddr_in6);
-						break;
-					default:
-						fprintf(stderr, "unexpected sockaddr family");
-						break;
-				}
-				gwctl = (struct cegw_ioctl*)malloc(sizeof(*gwctl) + dstcnt*addrlen);
-				break;
-			default: /* udp destination */
-				dst = (struct sockaddr *)(gwctl->udp_dst + (i-3)*addrlen);
-				readsockaddr(argv[i], dst, udp_addr->sa_family);
-
-				break;
-		}
-	}
-
-	/* prepare udp socket */
-	udp_sock = socket(udp_addr->sa_family, SOCK_DGRAM, IPPROTO_UDP);
-	if (udp_sock == -1) {
-		perror("udp socket(..)");
-		return 1;
-	}
-
-	if (bind(udp_sock, udp_addr, addrlen) != 0) {
-		perror("bind(udp)");
-		return 1;
-	}
-
-	/* prepare can socket */
-	can_sock = socket(PF_CAN, SOCK_RAW, CAN_RAW);
-	if (can_sock == -1) {
-		perror("can socket(..)");
-		return 1;
-	}
-
-	if (bind(can_sock, (struct sockaddr *)&can_addr, sizeof(struct sockaddr_can)) != 0) {
-		perror("bind(can)");
-		return 1;
-	}
-
-	/* can filter */
-	if (nptr)
-		readfilter(nptr, &filter, &numfilter, &err_mask);
-
-	if (err_mask)
-		setsockopt(can_sock, SOL_CAN_RAW, CAN_RAW_ERR_FILTER,
-				&err_mask, sizeof(err_mask));
-
-	if (numfilter)
-		setsockopt(can_sock, SOL_CAN_RAW, CAN_RAW_FILTER,
-				filter, numfilter * sizeof(struct can_filter));
-	free(filter);
-
-	/* send it to kernel gateway */
-	fd = open("/dev/canethgw", O_RDONLY);
-	if (fd == -1) {
-		perror("/dev/canethgw");
-		return 1;
-	}
-
-	gwctl->can_sock = can_sock;
-	gwctl->udp_sock = udp_sock;
-	gwctl->udp_dstcnt = dstcnt;
-	gwctl->udp_addrlen = addrlen;
-
-	if (ioctl(fd, CEGW_IOCTL_START, gwctl) != 0) {
-		perror("ioctl");
-		return 1;
-	}
-	printf("gateway successfully set and running\n");
-	free(gwctl);
-
-	/* sleep until someone kills me */
-	pause();
-
-	return 0;
-}