diff options
Diffstat (limited to 'ipsend/snit.c')
| -rw-r--r-- | ipsend/snit.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/ipsend/snit.c b/ipsend/snit.c new file mode 100644 index 0000000..bcd07d0 --- /dev/null +++ b/ipsend/snit.c @@ -0,0 +1,158 @@ +/* + * (C)opyright 1992-1998 Darren Reed. (from tcplog) + * + * See the IPFILTER.LICENCE file for details on licencing. + * + */ + +#include <stdio.h> +#include <netdb.h> +#include <ctype.h> +#include <signal.h> +#include <errno.h> +#include <sys/types.h> +#include <sys/time.h> +#include <sys/timeb.h> +#include <sys/socket.h> +#include <sys/file.h> +#include <sys/ioctl.h> +#include <net/nit.h> +#include <sys/fcntlcom.h> +#include <sys/dir.h> +#include <net/nit_if.h> +#include <net/nit_pf.h> +#include <net/nit_buf.h> +#include <net/packetfilt.h> +#include <sys/stropts.h> + +#include <net/if.h> +#include <netinet/in.h> +#include <netinet/in_systm.h> +#include <netinet/ip.h> +#include <netinet/if_ether.h> +#include <netinet/ip_var.h> +#include <netinet/udp.h> +#include <netinet/udp_var.h> +#include <netinet/tcp.h> + +#include "ipsend.h" + +#if !defined(lint) +static const char sccsid[] = "@(#)snit.c 1.5 1/11/96 (C)1995 Darren Reed"; +static const char rcsid[] = "@(#)$Id: snit.c,v 2.3 2001/06/09 17:09:26 darrenr Exp $"; +#endif + +#define CHUNKSIZE 8192 +#define BUFSPACE (4*CHUNKSIZE) + +/* + * Be careful to only include those defined in the flags option for the + * interface are included in the header size. + */ +#define BUFHDR_SIZE (sizeof(struct nit_bufhdr)) +#define NIT_HDRSIZE (BUFHDR_SIZE) + +static int timeout; + + +int initdevice(device, tout) +char *device; +int tout; +{ + struct strioctl si; + struct timeval to; + struct ifreq ifr; + int fd; + + if ((fd = open("/dev/nit", O_RDWR)) < 0) + { + perror("/dev/nit"); + exit(-1); + } + + /* + * arrange to get messages from the NIT STREAM and use NIT_BUF option + */ + ioctl(fd, I_SRDOPT, (char*)RMSGD); + ioctl(fd, I_PUSH, "nbuf"); + + /* + * set the timeout + */ + timeout = tout; + si.ic_timout = 1; + to.tv_sec = 1; + to.tv_usec = 0; + si.ic_cmd = NIOCSTIME; + si.ic_len = sizeof(to); + si.ic_dp = (char*)&to; + if (ioctl(fd, I_STR, (char*)&si) == -1) + { + perror("ioctl: NIT timeout"); + exit(-1); + } + + /* + * request the interface + */ + strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name)); + ifr.ifr_name[sizeof(ifr.ifr_name) - 1] = ' '; + si.ic_cmd = NIOCBIND; + si.ic_len = sizeof(ifr); + si.ic_dp = (char*)𝔦 + if (ioctl(fd, I_STR, (char*)&si) == -1) + { + perror(ifr.ifr_name); + exit(1); + } + return fd; +} + + +/* + * output an IP packet onto a fd opened for /dev/nit + */ +int sendip(fd, pkt, len) +int fd, len; +char *pkt; +{ + struct sockaddr sk, *sa = &sk; + struct strbuf cbuf, *cp = &cbuf, dbuf, *dp = &dbuf; + + /* + * For ethernet, need at least 802.3 header and IP header. + */ + if (len < (sizeof(sa->sa_data) + sizeof(struct ip))) + return -1; + /* + * to avoid any output processing for IP, say we're not. + */ + sa->sa_family = AF_UNSPEC; + bcopy(pkt, sa->sa_data, sizeof(sa->sa_data)); + pkt += sizeof(sa->sa_data); + len -= sizeof(sa->sa_data); + + /* + * construct NIT STREAMS messages, first control then data. + */ + cp->len = sizeof(*sa); + cp->maxlen = sizeof(*sa); + cp->buf = (char *)sa; + + dp->buf = pkt; + dp->len = len; + dp->maxlen = dp->len; + + if (putmsg(fd, cp, dp, 0) == -1) + { + perror("putmsg"); + return -1; + } + + if (ioctl(fd, I_FLUSH, FLUSHW) == -1) + { + perror("I_FLUSH"); + return -1; + } + return len; +} |
