diff options
Diffstat (limited to 'contrib/ipfilter/ipsd/slinux.c')
-rw-r--r-- | contrib/ipfilter/ipsd/slinux.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/contrib/ipfilter/ipsd/slinux.c b/contrib/ipfilter/ipsd/slinux.c new file mode 100644 index 0000000..1115b86 --- /dev/null +++ b/contrib/ipfilter/ipsd/slinux.c @@ -0,0 +1,120 @@ +/* + * (C)opyright October 1992 Darren Reed. (from tcplog) + * + * This software may be freely distributed as long as it is not altered + * in any way and that this messagge always accompanies it. + * + * The author of this software makes no garuntee about the + * performance of this package or its suitability to fulfill any purpose. + * + */ + +#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 <sys/dir.h> +#include <linux/netdevice.h> +#include <net/if.h> +#include <netinet/in.h> +#include <netinet/ip.h> +#include <netinet/tcp.h> +#include "ip_compat.h" +#include "tcpip.h" + +#ifndef lint +static char sccsid[] = "@(#)slinux.c 1.1 12/3/95 (C) 1995 Darren Reed"; +#endif + +#define BUFSPACE 32768 + +/* + * Be careful to only include those defined in the flags option for the + * interface are included in the header size. + */ + +static int timeout; +static char *eth_dev = NULL; + + +int ack_recv(bp) +char *bp; +{ + struct tcpip tip; + tcphdr_t *tcp; + ip_t *ip; + + ip = (struct ip *)&tip; + tcp = (tcphdr_t *)(ip + 1); + + bcopy(bp, (char *)&tip, sizeof(tip)); + bcopy(bp + (ip.ip_hl << 2), (char *)tcp, sizeof(*tcp)); + if (0 == detect(ip, tcp)) + return 1; + return 0; +} + + +void readloop(fd, port, dst) +int fd, port; +struct in_addr dst; +{ + static u_char buf[BUFSPACE]; + struct sockaddr dest; + register u_char *bp = buf; + register int cc; + int dlen, done = 0; + time_t now = time(NULL); + + do { + fflush(stdout); + dlen = sizeof(dest); + bzero((char *)&dest, dlen); + cc = recvfrom(fd, buf, BUFSPACE, 0, &dest, &dlen); + if (!cc) + if ((time(NULL) - now) > timeout) + return done; + else + continue; + + if (bp[12] != 0x8 || bp[13] != 0) + continue; /* not ip */ + + /* + * get rid of non-tcp or fragmented packets here. + */ + if (cc >= sizeof(struct tcpiphdr)) + { + if (((bp[14+9] != IPPROTO_TCP) && + (bp[14+9] != IPPROTO_UDP)) || + (bp[14+6] & 0x1f) || (bp[14+6] & 0xff)) + continue; + done += ack_recv(bp + 14); + } + } while (cc >= 0); + perror("read"); + exit(-1); +} + +int initdevice(dev, tout) +char *dev; +int tout; +{ + int fd; + + eth_dev = strdup(dev); + if ((fd = socket(AF_INET, SOCK_PACKET, htons(ETHERTYPE_IP))) == -1) + { + perror("socket(SOCK_PACKET)"); + exit(-1); + } + + return fd; +} |