1 /* 2 * NPF initialisation and handler routines. 3 * 4 * Public Domain. 5 */ 6 7 #ifdef _KERNEL 8 #include <sys/types.h> 9 #include <sys/cprng.h> 10 #include <sys/kmem.h> 11 #include <net/if.h> 12 #include <net/if_types.h> 13 #endif 14 15 #include "npf_impl.h" 16 #include "npf_test.h" 17 18 /* State of the current stream. */ 19 static npf_state_t cstream_state; 20 static void * cstream_ptr; 21 static bool cstream_retval; 22 23 static long (*_random_func)(void); 24 static int (*_pton_func)(int, const char *, void *); 25 static const char * (*_ntop_func)(int, const void *, char *, socklen_t); 26 27 static void npf_state_sample(npf_state_t *, bool); 28 29 static void load_npf_config_ifs(nvlist_t *, bool); 30 31 #ifndef __NetBSD__ 32 /* 33 * Standalone NPF: we define the same struct ifnet members 34 * to reduce the npf_ifops_t implementation differences. 35 */ 36 struct ifnet { 37 char if_xname[32]; 38 void * if_softc; 39 TAILQ_ENTRY(ifnet) if_list; 40 }; 41 #endif 42 43 static TAILQ_HEAD(, ifnet) npftest_ifnet_list = 44 TAILQ_HEAD_INITIALIZER(npftest_ifnet_list); 45 46 static const char * npftest_ifop_getname(npf_t *, ifnet_t *); 47 static ifnet_t * npftest_ifop_lookup(npf_t *, const char *); 48 static void npftest_ifop_flush(npf_t *, void *); 49 static void * npftest_ifop_getmeta(npf_t *, const ifnet_t *); 50 static void npftest_ifop_setmeta(npf_t *, ifnet_t *, void *); 51 52 const npf_ifops_t npftest_ifops = { 53 .getname = npftest_ifop_getname, 54 .lookup = npftest_ifop_lookup, 55 .flush = npftest_ifop_flush, 56 .getmeta = npftest_ifop_getmeta, 57 .setmeta = npftest_ifop_setmeta, 58 }; 59 60 void 61 npf_test_init(int (*pton_func)(int, const char *, void *), 62 const char *(*ntop_func)(int, const void *, char *, socklen_t), 63 long (*rndfunc)(void)) 64 { 65 npf_t *npf; 66 67 #ifdef __NetBSD__ 68 // XXX: Workaround for npf_init() 69 if ((npf = npf_getkernctx()) != NULL) { 70 npf_worker_discharge(npf); 71 npf_worker_sysfini(); 72 } 73 #endif 74 npf = npfk_create(0, &npftest_mbufops, &npftest_ifops, NULL); 75 npfk_thread_register(npf); 76 77 npf_setkernctx(npf); 78 79 npf_state_setsampler(npf_state_sample); 80 _pton_func = pton_func; 81 _ntop_func = ntop_func; 82 _random_func = rndfunc; 83 84 (void)npf_test_addif(IFNAME_DUMMY, false, false); 85 } 86 87 void 88 npf_test_fini(void) 89 { 90 npf_t *npf = npf_getkernctx(); 91 int ret; 92 93 ret = npf_config_read_enter(npf); 94 npf_config_procs_null(npf); 95 npf_config_read_exit(npf, ret); 96 97 ret = npf_ext_log_fini(npf); 98 assert(ret == 0); 99 ret = npf_ext_normalize_fini(npf); 100 assert(ret == 0); 101 ret = npf_ext_route_fini(npf); 102 assert(ret == 0); 103 104 npfk_thread_unregister(npf); 105 npfk_destroy(npf); 106 } 107 108 int 109 npf_test_load(const void *buf, size_t len, bool verbose) 110 { 111 nvlist_t *npf_dict; 112 npf_error_t error; 113 int ret; 114 115 npf_t* npf = npf_getkernctx(); 116 117 npf_dict = nvlist_unpack(buf, len, 0); 118 if (!npf_dict) { 119 printf("%s: could not unpack the nvlist\n", __func__); 120 return EINVAL; 121 } 122 load_npf_config_ifs(npf_dict, verbose); 123 124 /* register the npf extensions */ 125 ret = npf_ext_log_init(npf); 126 assert(ret == 0); 127 ret = npf_ext_normalize_init(npf); 128 assert(ret == 0); 129 ret = npf_ext_route_init(npf); 130 assert(ret == 0); 131 132 ret = npfk_load(npf, npf_dict, &error); 133 nvlist_destroy(npf_dict); 134 return ret; 135 } 136 137 ifnet_t * 138 npf_test_addif(const char *ifname, bool reg, bool verbose) 139 { 140 npf_t *npf = npf_getkernctx(); 141 ifnet_t *ifp = kmem_zalloc(sizeof(*ifp), KM_SLEEP); 142 143 /* 144 * This is a "fake" interface with explicitly set index. 145 * Note: test modules may not setup pfil(9) hooks and if_attach() 146 * may not trigger npf_ifmap_attach(), so we call it manually. 147 */ 148 strlcpy(ifp->if_xname, ifname, sizeof(ifp->if_xname)); 149 TAILQ_INSERT_TAIL(&npftest_ifnet_list, ifp, if_list); 150 151 npfk_ifmap_attach(npf, ifp); 152 if (reg) { 153 npf_ifmap_register(npf, ifname); 154 } 155 156 if (verbose) { 157 printf("+ Interface %s\n", ifname); 158 } 159 return ifp; 160 } 161 162 ifnet_t * 163 npf_test_getif(const char *ifname) 164 { 165 ifnet_t *ifp; 166 167 TAILQ_FOREACH(ifp, &npftest_ifnet_list, if_list) { 168 if (!strcmp(ifp->if_xname, ifname)) 169 return ifp; 170 } 171 return NULL; 172 } 173 174 static void 175 load_npf_config_ifs(nvlist_t *npf_dict, bool verbose) 176 { 177 const nvlist_t * const *iflist; 178 const nvlist_t *dbg_dict; 179 size_t nitems; 180 181 dbg_dict = dnvlist_get_nvlist(npf_dict, "debug", NULL); 182 if (!dbg_dict) { 183 return; 184 } 185 if (!nvlist_exists_nvlist_array(dbg_dict, "interfaces")) { 186 return; 187 } 188 iflist = nvlist_get_nvlist_array(dbg_dict, "interfaces", &nitems); 189 for (unsigned i = 0; i < nitems; i++) { 190 const nvlist_t *ifdict = iflist[i]; 191 const char *ifname; 192 193 if ((ifname = nvlist_get_string(ifdict, "name")) != NULL) { 194 (void)npf_test_addif(ifname, true, verbose); 195 } 196 } 197 } 198 199 static const char * 200 npftest_ifop_getname(npf_t *npf __unused, ifnet_t *ifp) 201 { 202 return ifp->if_xname; 203 } 204 205 static ifnet_t * 206 npftest_ifop_lookup(npf_t *npf __unused, const char *ifname) 207 { 208 return npf_test_getif(ifname); 209 } 210 211 static void 212 npftest_ifop_flush(npf_t *npf __unused, void *arg) 213 { 214 ifnet_t *ifp; 215 216 TAILQ_FOREACH(ifp, &npftest_ifnet_list, if_list) 217 ifp->if_softc = arg; 218 } 219 220 static void * 221 npftest_ifop_getmeta(npf_t *npf __unused, const ifnet_t *ifp) 222 { 223 return ifp->if_softc; 224 } 225 226 static void 227 npftest_ifop_setmeta(npf_t *npf __unused, ifnet_t *ifp, void *arg) 228 { 229 ifp->if_softc = arg; 230 } 231 232 /* 233 * State sampler - this routine is called from inside of NPF state engine. 234 */ 235 static void 236 npf_state_sample(npf_state_t *nst, bool retval) 237 { 238 /* Pointer will serve as an ID. */ 239 cstream_ptr = nst; 240 memcpy(&cstream_state, nst, sizeof(npf_state_t)); 241 cstream_retval = retval; 242 } 243 244 int 245 npf_test_statetrack(const void *data, size_t len, ifnet_t *ifp, 246 bool forw, int64_t *result) 247 { 248 npf_t *npf = npf_getkernctx(); 249 struct mbuf *m; 250 int i = 0, error; 251 252 m = mbuf_getwithdata(data, len); 253 error = npfk_packet_handler(npf, &m, ifp, forw ? PFIL_OUT : PFIL_IN); 254 if (error) { 255 assert(m == NULL); 256 return error; 257 } 258 assert(m != NULL); 259 m_freem(m); 260 261 const int di = forw ? NPF_FLOW_FORW : NPF_FLOW_BACK; 262 npf_tcpstate_t *fstate = &cstream_state.nst_tcpst[di]; 263 npf_tcpstate_t *tstate = &cstream_state.nst_tcpst[!di]; 264 265 result[i++] = (intptr_t)cstream_ptr; 266 result[i++] = cstream_retval; 267 result[i++] = cstream_state.nst_state; 268 269 result[i++] = fstate->nst_end; 270 result[i++] = fstate->nst_maxend; 271 result[i++] = fstate->nst_maxwin; 272 result[i++] = fstate->nst_wscale; 273 274 result[i++] = tstate->nst_end; 275 result[i++] = tstate->nst_maxend; 276 result[i++] = tstate->nst_maxwin; 277 result[i++] = tstate->nst_wscale; 278 279 return 0; 280 } 281 282 int 283 npf_inet_pton(int af, const char *src, void *dst) 284 { 285 return _pton_func(af, src, dst); 286 } 287 288 const char * 289 npf_inet_ntop(int af, const void *src, char *dst, socklen_t size) 290 { 291 return _ntop_func(af, src, dst, size); 292 } 293 294 #ifdef _KERNEL 295 /* 296 * Need to override cprng_fast32() -- we need deterministic PRNG. 297 */ 298 uint32_t 299 cprng_fast32(void) 300 { 301 return (uint32_t)(_random_func ? _random_func() : random()); 302 } 303 #endif 304
Indexes created Sun Nov 01 00:25:34 UTC 2026