1238106Sdes/* 2238106Sdes * util/net_help.c - implementation of the network helper code 3238106Sdes * 4238106Sdes * Copyright (c) 2007, NLnet Labs. All rights reserved. 5238106Sdes * 6238106Sdes * This software is open source. 7238106Sdes * 8238106Sdes * Redistribution and use in source and binary forms, with or without 9238106Sdes * modification, are permitted provided that the following conditions 10238106Sdes * are met: 11238106Sdes * 12238106Sdes * Redistributions of source code must retain the above copyright notice, 13238106Sdes * this list of conditions and the following disclaimer. 14238106Sdes * 15238106Sdes * Redistributions in binary form must reproduce the above copyright notice, 16238106Sdes * this list of conditions and the following disclaimer in the documentation 17238106Sdes * and/or other materials provided with the distribution. 18238106Sdes * 19238106Sdes * Neither the name of the NLNET LABS nor the names of its contributors may 20238106Sdes * be used to endorse or promote products derived from this software without 21238106Sdes * specific prior written permission. 22238106Sdes * 23238106Sdes * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24269257Sdes * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25269257Sdes * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 26269257Sdes * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27269257Sdes * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28269257Sdes * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 29269257Sdes * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 30269257Sdes * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31269257Sdes * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32269257Sdes * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33269257Sdes * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34238106Sdes */ 35238106Sdes/** 36238106Sdes * \file 37238106Sdes * Implementation of net_help.h. 38238106Sdes */ 39238106Sdes 40238106Sdes#include "config.h" 41238106Sdes#include "util/net_help.h" 42238106Sdes#include "util/log.h" 43238106Sdes#include "util/data/dname.h" 44238106Sdes#include "util/module.h" 45238106Sdes#include "util/regional.h" 46269257Sdes#include "ldns/parseutil.h" 47269257Sdes#include "ldns/wire2str.h" 48238106Sdes#include <fcntl.h> 49249141Sdes#ifdef HAVE_OPENSSL_SSL_H 50238106Sdes#include <openssl/ssl.h> 51249141Sdes#endif 52249141Sdes#ifdef HAVE_OPENSSL_ERR_H 53238106Sdes#include <openssl/err.h> 54249141Sdes#endif 55238106Sdes 56238106Sdes/** max length of an IP address (the address portion) that we allow */ 57238106Sdes#define MAX_ADDR_STRLEN 128 /* characters */ 58238106Sdes/** default value for EDNS ADVERTISED size */ 59238106Sdesuint16_t EDNS_ADVERTISED_SIZE = 4096; 60238106Sdes 61238106Sdes/** minimal responses when positive answer: default is no */ 62238106Sdesint MINIMAL_RESPONSES = 0; 63238106Sdes 64238106Sdes/** rrset order roundrobin: default is no */ 65238106Sdesint RRSET_ROUNDROBIN = 0; 66238106Sdes 67238106Sdes/* returns true is string addr is an ip6 specced address */ 68238106Sdesint 69238106Sdesstr_is_ip6(const char* str) 70238106Sdes{ 71238106Sdes if(strchr(str, ':')) 72238106Sdes return 1; 73238106Sdes else return 0; 74238106Sdes} 75238106Sdes 76238106Sdesint 77238106Sdesfd_set_nonblock(int s) 78238106Sdes{ 79238106Sdes#ifdef HAVE_FCNTL 80238106Sdes int flag; 81238106Sdes if((flag = fcntl(s, F_GETFL)) == -1) { 82238106Sdes log_err("can't fcntl F_GETFL: %s", strerror(errno)); 83238106Sdes flag = 0; 84238106Sdes } 85238106Sdes flag |= O_NONBLOCK; 86238106Sdes if(fcntl(s, F_SETFL, flag) == -1) { 87238106Sdes log_err("can't fcntl F_SETFL: %s", strerror(errno)); 88238106Sdes return 0; 89238106Sdes } 90238106Sdes#elif defined(HAVE_IOCTLSOCKET) 91238106Sdes unsigned long on = 1; 92238106Sdes if(ioctlsocket(s, FIONBIO, &on) != 0) { 93238106Sdes log_err("can't ioctlsocket FIONBIO on: %s", 94238106Sdes wsa_strerror(WSAGetLastError())); 95238106Sdes } 96238106Sdes#endif 97238106Sdes return 1; 98238106Sdes} 99238106Sdes 100238106Sdesint 101238106Sdesfd_set_block(int s) 102238106Sdes{ 103238106Sdes#ifdef HAVE_FCNTL 104238106Sdes int flag; 105238106Sdes if((flag = fcntl(s, F_GETFL)) == -1) { 106238106Sdes log_err("cannot fcntl F_GETFL: %s", strerror(errno)); 107238106Sdes flag = 0; 108238106Sdes } 109238106Sdes flag &= ~O_NONBLOCK; 110238106Sdes if(fcntl(s, F_SETFL, flag) == -1) { 111238106Sdes log_err("cannot fcntl F_SETFL: %s", strerror(errno)); 112238106Sdes return 0; 113238106Sdes } 114238106Sdes#elif defined(HAVE_IOCTLSOCKET) 115238106Sdes unsigned long off = 0; 116238106Sdes if(ioctlsocket(s, FIONBIO, &off) != 0) { 117238106Sdes log_err("can't ioctlsocket FIONBIO off: %s", 118238106Sdes wsa_strerror(WSAGetLastError())); 119238106Sdes } 120238106Sdes#endif 121238106Sdes return 1; 122238106Sdes} 123238106Sdes 124238106Sdesint 125238106Sdesis_pow2(size_t num) 126238106Sdes{ 127238106Sdes if(num == 0) return 1; 128238106Sdes return (num & (num-1)) == 0; 129238106Sdes} 130238106Sdes 131238106Sdesvoid* 132238106Sdesmemdup(void* data, size_t len) 133238106Sdes{ 134238106Sdes void* d; 135238106Sdes if(!data) return NULL; 136238106Sdes if(len == 0) return NULL; 137238106Sdes d = malloc(len); 138238106Sdes if(!d) return NULL; 139238106Sdes memcpy(d, data, len); 140238106Sdes return d; 141238106Sdes} 142238106Sdes 143238106Sdesvoid 144238106Sdeslog_addr(enum verbosity_value v, const char* str, 145238106Sdes struct sockaddr_storage* addr, socklen_t addrlen) 146238106Sdes{ 147238106Sdes uint16_t port; 148238106Sdes const char* family = "unknown"; 149238106Sdes char dest[100]; 150238106Sdes int af = (int)((struct sockaddr_in*)addr)->sin_family; 151238106Sdes void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 152238106Sdes if(verbosity < v) 153238106Sdes return; 154238106Sdes switch(af) { 155238106Sdes case AF_INET: family="ip4"; break; 156238106Sdes case AF_INET6: family="ip6"; 157238106Sdes sinaddr = &((struct sockaddr_in6*)addr)->sin6_addr; 158238106Sdes break; 159238106Sdes case AF_UNIX: family="unix"; break; 160238106Sdes default: break; 161238106Sdes } 162238106Sdes if(inet_ntop(af, sinaddr, dest, (socklen_t)sizeof(dest)) == 0) { 163269257Sdes (void)strlcpy(dest, "(inet_ntop error)", sizeof(dest)); 164238106Sdes } 165238106Sdes dest[sizeof(dest)-1] = 0; 166238106Sdes port = ntohs(((struct sockaddr_in*)addr)->sin_port); 167238106Sdes if(verbosity >= 4) 168238106Sdes verbose(v, "%s %s %s port %d (len %d)", str, family, dest, 169238106Sdes (int)port, (int)addrlen); 170238106Sdes else verbose(v, "%s %s port %d", str, dest, (int)port); 171238106Sdes} 172238106Sdes 173238106Sdesint 174238106Sdesextstrtoaddr(const char* str, struct sockaddr_storage* addr, 175238106Sdes socklen_t* addrlen) 176238106Sdes{ 177238106Sdes char* s; 178238106Sdes int port = UNBOUND_DNS_PORT; 179238106Sdes if((s=strchr(str, '@'))) { 180238106Sdes char buf[MAX_ADDR_STRLEN]; 181238106Sdes if(s-str >= MAX_ADDR_STRLEN) { 182238106Sdes return 0; 183238106Sdes } 184269257Sdes (void)strlcpy(buf, str, sizeof(buf)); 185238106Sdes buf[s-str] = 0; 186238106Sdes port = atoi(s+1); 187238106Sdes if(port == 0 && strcmp(s+1,"0")!=0) { 188238106Sdes return 0; 189238106Sdes } 190238106Sdes return ipstrtoaddr(buf, port, addr, addrlen); 191238106Sdes } 192238106Sdes return ipstrtoaddr(str, port, addr, addrlen); 193238106Sdes} 194238106Sdes 195238106Sdes 196238106Sdesint 197238106Sdesipstrtoaddr(const char* ip, int port, struct sockaddr_storage* addr, 198238106Sdes socklen_t* addrlen) 199238106Sdes{ 200238106Sdes uint16_t p; 201238106Sdes if(!ip) return 0; 202238106Sdes p = (uint16_t) port; 203238106Sdes if(str_is_ip6(ip)) { 204238106Sdes char buf[MAX_ADDR_STRLEN]; 205238106Sdes char* s; 206238106Sdes struct sockaddr_in6* sa = (struct sockaddr_in6*)addr; 207238106Sdes *addrlen = (socklen_t)sizeof(struct sockaddr_in6); 208238106Sdes memset(sa, 0, *addrlen); 209238106Sdes sa->sin6_family = AF_INET6; 210238106Sdes sa->sin6_port = (in_port_t)htons(p); 211238106Sdes if((s=strchr(ip, '%'))) { /* ip6%interface, rfc 4007 */ 212238106Sdes if(s-ip >= MAX_ADDR_STRLEN) 213238106Sdes return 0; 214269257Sdes (void)strlcpy(buf, ip, sizeof(buf)); 215238106Sdes buf[s-ip]=0; 216238106Sdes sa->sin6_scope_id = (uint32_t)atoi(s+1); 217238106Sdes ip = buf; 218238106Sdes } 219238106Sdes if(inet_pton((int)sa->sin6_family, ip, &sa->sin6_addr) <= 0) { 220238106Sdes return 0; 221238106Sdes } 222238106Sdes } else { /* ip4 */ 223238106Sdes struct sockaddr_in* sa = (struct sockaddr_in*)addr; 224238106Sdes *addrlen = (socklen_t)sizeof(struct sockaddr_in); 225238106Sdes memset(sa, 0, *addrlen); 226238106Sdes sa->sin_family = AF_INET; 227238106Sdes sa->sin_port = (in_port_t)htons(p); 228238106Sdes if(inet_pton((int)sa->sin_family, ip, &sa->sin_addr) <= 0) { 229238106Sdes return 0; 230238106Sdes } 231238106Sdes } 232238106Sdes return 1; 233238106Sdes} 234238106Sdes 235238106Sdesint netblockstrtoaddr(const char* str, int port, struct sockaddr_storage* addr, 236238106Sdes socklen_t* addrlen, int* net) 237238106Sdes{ 238238106Sdes char* s = NULL; 239238106Sdes *net = (str_is_ip6(str)?128:32); 240238106Sdes if((s=strchr(str, '/'))) { 241238106Sdes if(atoi(s+1) > *net) { 242238106Sdes log_err("netblock too large: %s", str); 243238106Sdes return 0; 244238106Sdes } 245238106Sdes *net = atoi(s+1); 246238106Sdes if(*net == 0 && strcmp(s+1, "0") != 0) { 247238106Sdes log_err("cannot parse netblock: '%s'", str); 248238106Sdes return 0; 249238106Sdes } 250238106Sdes if(!(s = strdup(str))) { 251238106Sdes log_err("out of memory"); 252238106Sdes return 0; 253238106Sdes } 254238106Sdes *strchr(s, '/') = '\0'; 255238106Sdes } 256238106Sdes if(!ipstrtoaddr(s?s:str, port, addr, addrlen)) { 257238106Sdes free(s); 258238106Sdes log_err("cannot parse ip address: '%s'", str); 259238106Sdes return 0; 260238106Sdes } 261238106Sdes if(s) { 262238106Sdes free(s); 263238106Sdes addr_mask(addr, *addrlen, *net); 264238106Sdes } 265238106Sdes return 1; 266238106Sdes} 267238106Sdes 268238106Sdesvoid 269238106Sdeslog_nametypeclass(enum verbosity_value v, const char* str, uint8_t* name, 270238106Sdes uint16_t type, uint16_t dclass) 271238106Sdes{ 272238106Sdes char buf[LDNS_MAX_DOMAINLEN+1]; 273238106Sdes char t[12], c[12]; 274238106Sdes const char *ts, *cs; 275238106Sdes if(verbosity < v) 276238106Sdes return; 277238106Sdes dname_str(name, buf); 278238106Sdes if(type == LDNS_RR_TYPE_TSIG) ts = "TSIG"; 279238106Sdes else if(type == LDNS_RR_TYPE_IXFR) ts = "IXFR"; 280238106Sdes else if(type == LDNS_RR_TYPE_AXFR) ts = "AXFR"; 281238106Sdes else if(type == LDNS_RR_TYPE_MAILB) ts = "MAILB"; 282238106Sdes else if(type == LDNS_RR_TYPE_MAILA) ts = "MAILA"; 283238106Sdes else if(type == LDNS_RR_TYPE_ANY) ts = "ANY"; 284269257Sdes else if(sldns_rr_descript(type) && sldns_rr_descript(type)->_name) 285269257Sdes ts = sldns_rr_descript(type)->_name; 286238106Sdes else { 287238106Sdes snprintf(t, sizeof(t), "TYPE%d", (int)type); 288238106Sdes ts = t; 289238106Sdes } 290269257Sdes if(sldns_lookup_by_id(sldns_rr_classes, (int)dclass) && 291269257Sdes sldns_lookup_by_id(sldns_rr_classes, (int)dclass)->name) 292269257Sdes cs = sldns_lookup_by_id(sldns_rr_classes, (int)dclass)->name; 293238106Sdes else { 294238106Sdes snprintf(c, sizeof(c), "CLASS%d", (int)dclass); 295238106Sdes cs = c; 296238106Sdes } 297238106Sdes log_info("%s %s %s %s", str, buf, ts, cs); 298238106Sdes} 299238106Sdes 300238106Sdesvoid log_name_addr(enum verbosity_value v, const char* str, uint8_t* zone, 301238106Sdes struct sockaddr_storage* addr, socklen_t addrlen) 302238106Sdes{ 303238106Sdes uint16_t port; 304238106Sdes const char* family = "unknown_family "; 305238106Sdes char namebuf[LDNS_MAX_DOMAINLEN+1]; 306238106Sdes char dest[100]; 307238106Sdes int af = (int)((struct sockaddr_in*)addr)->sin_family; 308238106Sdes void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 309238106Sdes if(verbosity < v) 310238106Sdes return; 311238106Sdes switch(af) { 312238106Sdes case AF_INET: family=""; break; 313238106Sdes case AF_INET6: family=""; 314238106Sdes sinaddr = &((struct sockaddr_in6*)addr)->sin6_addr; 315238106Sdes break; 316238106Sdes case AF_UNIX: family="unix_family "; break; 317238106Sdes default: break; 318238106Sdes } 319238106Sdes if(inet_ntop(af, sinaddr, dest, (socklen_t)sizeof(dest)) == 0) { 320269257Sdes (void)strlcpy(dest, "(inet_ntop error)", sizeof(dest)); 321238106Sdes } 322238106Sdes dest[sizeof(dest)-1] = 0; 323238106Sdes port = ntohs(((struct sockaddr_in*)addr)->sin_port); 324238106Sdes dname_str(zone, namebuf); 325238106Sdes if(af != AF_INET && af != AF_INET6) 326238106Sdes verbose(v, "%s <%s> %s%s#%d (addrlen %d)", 327238106Sdes str, namebuf, family, dest, (int)port, (int)addrlen); 328238106Sdes else verbose(v, "%s <%s> %s%s#%d", 329238106Sdes str, namebuf, family, dest, (int)port); 330238106Sdes} 331238106Sdes 332238106Sdesint 333238106Sdessockaddr_cmp(struct sockaddr_storage* addr1, socklen_t len1, 334238106Sdes struct sockaddr_storage* addr2, socklen_t len2) 335238106Sdes{ 336238106Sdes struct sockaddr_in* p1_in = (struct sockaddr_in*)addr1; 337238106Sdes struct sockaddr_in* p2_in = (struct sockaddr_in*)addr2; 338238106Sdes struct sockaddr_in6* p1_in6 = (struct sockaddr_in6*)addr1; 339238106Sdes struct sockaddr_in6* p2_in6 = (struct sockaddr_in6*)addr2; 340238106Sdes if(len1 < len2) 341238106Sdes return -1; 342238106Sdes if(len1 > len2) 343238106Sdes return 1; 344238106Sdes log_assert(len1 == len2); 345238106Sdes if( p1_in->sin_family < p2_in->sin_family) 346238106Sdes return -1; 347238106Sdes if( p1_in->sin_family > p2_in->sin_family) 348238106Sdes return 1; 349238106Sdes log_assert( p1_in->sin_family == p2_in->sin_family ); 350238106Sdes /* compare ip4 */ 351238106Sdes if( p1_in->sin_family == AF_INET ) { 352238106Sdes /* just order it, ntohs not required */ 353238106Sdes if(p1_in->sin_port < p2_in->sin_port) 354238106Sdes return -1; 355238106Sdes if(p1_in->sin_port > p2_in->sin_port) 356238106Sdes return 1; 357238106Sdes log_assert(p1_in->sin_port == p2_in->sin_port); 358238106Sdes return memcmp(&p1_in->sin_addr, &p2_in->sin_addr, INET_SIZE); 359238106Sdes } else if (p1_in6->sin6_family == AF_INET6) { 360238106Sdes /* just order it, ntohs not required */ 361238106Sdes if(p1_in6->sin6_port < p2_in6->sin6_port) 362238106Sdes return -1; 363238106Sdes if(p1_in6->sin6_port > p2_in6->sin6_port) 364238106Sdes return 1; 365238106Sdes log_assert(p1_in6->sin6_port == p2_in6->sin6_port); 366238106Sdes return memcmp(&p1_in6->sin6_addr, &p2_in6->sin6_addr, 367238106Sdes INET6_SIZE); 368238106Sdes } else { 369238106Sdes /* eek unknown type, perform this comparison for sanity. */ 370238106Sdes return memcmp(addr1, addr2, len1); 371238106Sdes } 372238106Sdes} 373238106Sdes 374238106Sdesint 375238106Sdessockaddr_cmp_addr(struct sockaddr_storage* addr1, socklen_t len1, 376238106Sdes struct sockaddr_storage* addr2, socklen_t len2) 377238106Sdes{ 378238106Sdes struct sockaddr_in* p1_in = (struct sockaddr_in*)addr1; 379238106Sdes struct sockaddr_in* p2_in = (struct sockaddr_in*)addr2; 380238106Sdes struct sockaddr_in6* p1_in6 = (struct sockaddr_in6*)addr1; 381238106Sdes struct sockaddr_in6* p2_in6 = (struct sockaddr_in6*)addr2; 382238106Sdes if(len1 < len2) 383238106Sdes return -1; 384238106Sdes if(len1 > len2) 385238106Sdes return 1; 386238106Sdes log_assert(len1 == len2); 387238106Sdes if( p1_in->sin_family < p2_in->sin_family) 388238106Sdes return -1; 389238106Sdes if( p1_in->sin_family > p2_in->sin_family) 390238106Sdes return 1; 391238106Sdes log_assert( p1_in->sin_family == p2_in->sin_family ); 392238106Sdes /* compare ip4 */ 393238106Sdes if( p1_in->sin_family == AF_INET ) { 394238106Sdes return memcmp(&p1_in->sin_addr, &p2_in->sin_addr, INET_SIZE); 395238106Sdes } else if (p1_in6->sin6_family == AF_INET6) { 396238106Sdes return memcmp(&p1_in6->sin6_addr, &p2_in6->sin6_addr, 397238106Sdes INET6_SIZE); 398238106Sdes } else { 399238106Sdes /* eek unknown type, perform this comparison for sanity. */ 400238106Sdes return memcmp(addr1, addr2, len1); 401238106Sdes } 402238106Sdes} 403238106Sdes 404238106Sdesint 405238106Sdesaddr_is_ip6(struct sockaddr_storage* addr, socklen_t len) 406238106Sdes{ 407238106Sdes if(len == (socklen_t)sizeof(struct sockaddr_in6) && 408238106Sdes ((struct sockaddr_in6*)addr)->sin6_family == AF_INET6) 409238106Sdes return 1; 410238106Sdes else return 0; 411238106Sdes} 412238106Sdes 413238106Sdesvoid 414238106Sdesaddr_mask(struct sockaddr_storage* addr, socklen_t len, int net) 415238106Sdes{ 416238106Sdes uint8_t mask[8] = {0x0, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe}; 417238106Sdes int i, max; 418238106Sdes uint8_t* s; 419238106Sdes if(addr_is_ip6(addr, len)) { 420238106Sdes s = (uint8_t*)&((struct sockaddr_in6*)addr)->sin6_addr; 421238106Sdes max = 128; 422238106Sdes } else { 423238106Sdes s = (uint8_t*)&((struct sockaddr_in*)addr)->sin_addr; 424238106Sdes max = 32; 425238106Sdes } 426238106Sdes if(net >= max) 427238106Sdes return; 428238106Sdes for(i=net/8+1; i<max/8; i++) { 429238106Sdes s[i] = 0; 430238106Sdes } 431238106Sdes s[net/8] &= mask[net&0x7]; 432238106Sdes} 433238106Sdes 434238106Sdesint 435238106Sdesaddr_in_common(struct sockaddr_storage* addr1, int net1, 436238106Sdes struct sockaddr_storage* addr2, int net2, socklen_t addrlen) 437238106Sdes{ 438238106Sdes int min = (net1<net2)?net1:net2; 439238106Sdes int i, to; 440238106Sdes int match = 0; 441238106Sdes uint8_t* s1, *s2; 442238106Sdes if(addr_is_ip6(addr1, addrlen)) { 443238106Sdes s1 = (uint8_t*)&((struct sockaddr_in6*)addr1)->sin6_addr; 444238106Sdes s2 = (uint8_t*)&((struct sockaddr_in6*)addr2)->sin6_addr; 445238106Sdes to = 16; 446238106Sdes } else { 447238106Sdes s1 = (uint8_t*)&((struct sockaddr_in*)addr1)->sin_addr; 448238106Sdes s2 = (uint8_t*)&((struct sockaddr_in*)addr2)->sin_addr; 449238106Sdes to = 4; 450238106Sdes } 451238106Sdes /* match = bits_in_common(s1, s2, to); */ 452238106Sdes for(i=0; i<to; i++) { 453238106Sdes if(s1[i] == s2[i]) { 454238106Sdes match += 8; 455238106Sdes } else { 456238106Sdes uint8_t z = s1[i]^s2[i]; 457238106Sdes log_assert(z); 458238106Sdes while(!(z&0x80)) { 459238106Sdes match++; 460238106Sdes z<<=1; 461238106Sdes } 462238106Sdes break; 463238106Sdes } 464238106Sdes } 465238106Sdes if(match > min) match = min; 466238106Sdes return match; 467238106Sdes} 468238106Sdes 469238106Sdesvoid 470238106Sdesaddr_to_str(struct sockaddr_storage* addr, socklen_t addrlen, 471238106Sdes char* buf, size_t len) 472238106Sdes{ 473238106Sdes int af = (int)((struct sockaddr_in*)addr)->sin_family; 474238106Sdes void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 475238106Sdes if(addr_is_ip6(addr, addrlen)) 476238106Sdes sinaddr = &((struct sockaddr_in6*)addr)->sin6_addr; 477238106Sdes if(inet_ntop(af, sinaddr, buf, (socklen_t)len) == 0) { 478238106Sdes snprintf(buf, len, "(inet_ntop_error)"); 479238106Sdes } 480238106Sdes} 481238106Sdes 482238106Sdesint 483238106Sdesaddr_is_ip4mapped(struct sockaddr_storage* addr, socklen_t addrlen) 484238106Sdes{ 485238106Sdes /* prefix for ipv4 into ipv6 mapping is ::ffff:x.x.x.x */ 486238106Sdes const uint8_t map_prefix[16] = 487238106Sdes {0,0,0,0, 0,0,0,0, 0,0,0xff,0xff, 0,0,0,0}; 488238106Sdes uint8_t* s; 489238106Sdes if(!addr_is_ip6(addr, addrlen)) 490238106Sdes return 0; 491238106Sdes /* s is 16 octet ipv6 address string */ 492238106Sdes s = (uint8_t*)&((struct sockaddr_in6*)addr)->sin6_addr; 493238106Sdes return (memcmp(s, map_prefix, 12) == 0); 494238106Sdes} 495238106Sdes 496238106Sdesint addr_is_broadcast(struct sockaddr_storage* addr, socklen_t addrlen) 497238106Sdes{ 498238106Sdes int af = (int)((struct sockaddr_in*)addr)->sin_family; 499238106Sdes void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 500238106Sdes return af == AF_INET && addrlen>=(socklen_t)sizeof(struct sockaddr_in) 501238106Sdes && memcmp(sinaddr, "\377\377\377\377", 4) == 0; 502238106Sdes} 503238106Sdes 504238106Sdesint addr_is_any(struct sockaddr_storage* addr, socklen_t addrlen) 505238106Sdes{ 506238106Sdes int af = (int)((struct sockaddr_in*)addr)->sin_family; 507238106Sdes void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 508238106Sdes void* sin6addr = &((struct sockaddr_in6*)addr)->sin6_addr; 509238106Sdes if(af == AF_INET && addrlen>=(socklen_t)sizeof(struct sockaddr_in) 510238106Sdes && memcmp(sinaddr, "\000\000\000\000", 4) == 0) 511238106Sdes return 1; 512238106Sdes else if(af==AF_INET6 && addrlen>=(socklen_t)sizeof(struct sockaddr_in6) 513238106Sdes && memcmp(sin6addr, "\000\000\000\000\000\000\000\000" 514238106Sdes "\000\000\000\000\000\000\000\000", 16) == 0) 515238106Sdes return 1; 516238106Sdes return 0; 517238106Sdes} 518238106Sdes 519238106Sdesvoid sock_list_insert(struct sock_list** list, struct sockaddr_storage* addr, 520238106Sdes socklen_t len, struct regional* region) 521238106Sdes{ 522238106Sdes struct sock_list* add = (struct sock_list*)regional_alloc(region, 523238106Sdes sizeof(*add) - sizeof(add->addr) + (size_t)len); 524238106Sdes if(!add) { 525238106Sdes log_err("out of memory in socketlist insert"); 526238106Sdes return; 527238106Sdes } 528238106Sdes log_assert(list); 529238106Sdes add->next = *list; 530238106Sdes add->len = len; 531238106Sdes *list = add; 532238106Sdes if(len) memmove(&add->addr, addr, len); 533238106Sdes} 534238106Sdes 535238106Sdesvoid sock_list_prepend(struct sock_list** list, struct sock_list* add) 536238106Sdes{ 537238106Sdes struct sock_list* last = add; 538238106Sdes if(!last) 539238106Sdes return; 540238106Sdes while(last->next) 541238106Sdes last = last->next; 542238106Sdes last->next = *list; 543238106Sdes *list = add; 544238106Sdes} 545238106Sdes 546238106Sdesint sock_list_find(struct sock_list* list, struct sockaddr_storage* addr, 547238106Sdes socklen_t len) 548238106Sdes{ 549238106Sdes while(list) { 550238106Sdes if(len == list->len) { 551238106Sdes if(len == 0 || sockaddr_cmp_addr(addr, len, 552238106Sdes &list->addr, list->len) == 0) 553238106Sdes return 1; 554238106Sdes } 555238106Sdes list = list->next; 556238106Sdes } 557238106Sdes return 0; 558238106Sdes} 559238106Sdes 560238106Sdesvoid sock_list_merge(struct sock_list** list, struct regional* region, 561238106Sdes struct sock_list* add) 562238106Sdes{ 563238106Sdes struct sock_list* p; 564238106Sdes for(p=add; p; p=p->next) { 565238106Sdes if(!sock_list_find(*list, &p->addr, p->len)) 566238106Sdes sock_list_insert(list, &p->addr, p->len, region); 567238106Sdes } 568238106Sdes} 569238106Sdes 570238106Sdesvoid 571238106Sdeslog_crypto_err(const char* str) 572238106Sdes{ 573249141Sdes#ifdef HAVE_SSL 574238106Sdes /* error:[error code]:[library name]:[function name]:[reason string] */ 575238106Sdes char buf[128]; 576238106Sdes unsigned long e; 577238106Sdes ERR_error_string_n(ERR_get_error(), buf, sizeof(buf)); 578238106Sdes log_err("%s crypto %s", str, buf); 579238106Sdes while( (e=ERR_get_error()) ) { 580238106Sdes ERR_error_string_n(e, buf, sizeof(buf)); 581238106Sdes log_err("and additionally crypto %s", buf); 582238106Sdes } 583249141Sdes#else 584249141Sdes (void)str; 585249141Sdes#endif /* HAVE_SSL */ 586238106Sdes} 587238106Sdes 588238106Sdesvoid* listen_sslctx_create(char* key, char* pem, char* verifypem) 589238106Sdes{ 590249141Sdes#ifdef HAVE_SSL 591238106Sdes SSL_CTX* ctx = SSL_CTX_new(SSLv23_server_method()); 592238106Sdes if(!ctx) { 593238106Sdes log_crypto_err("could not SSL_CTX_new"); 594238106Sdes return NULL; 595238106Sdes } 596238106Sdes /* no SSLv2 because has defects */ 597238106Sdes if(!(SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2)){ 598238106Sdes log_crypto_err("could not set SSL_OP_NO_SSLv2"); 599238106Sdes SSL_CTX_free(ctx); 600238106Sdes return NULL; 601238106Sdes } 602238106Sdes if(!SSL_CTX_use_certificate_file(ctx, pem, SSL_FILETYPE_PEM)) { 603238106Sdes log_err("error for cert file: %s", pem); 604238106Sdes log_crypto_err("error in SSL_CTX use_certificate_file"); 605238106Sdes SSL_CTX_free(ctx); 606238106Sdes return NULL; 607238106Sdes } 608238106Sdes if(!SSL_CTX_use_PrivateKey_file(ctx, key, SSL_FILETYPE_PEM)) { 609238106Sdes log_err("error for private key file: %s", key); 610238106Sdes log_crypto_err("Error in SSL_CTX use_PrivateKey_file"); 611238106Sdes SSL_CTX_free(ctx); 612238106Sdes return NULL; 613238106Sdes } 614238106Sdes if(!SSL_CTX_check_private_key(ctx)) { 615238106Sdes log_err("error for key file: %s", key); 616238106Sdes log_crypto_err("Error in SSL_CTX check_private_key"); 617238106Sdes SSL_CTX_free(ctx); 618238106Sdes return NULL; 619238106Sdes } 620238106Sdes 621238106Sdes if(verifypem && verifypem[0]) { 622238106Sdes if(!SSL_CTX_load_verify_locations(ctx, verifypem, NULL)) { 623238106Sdes log_crypto_err("Error in SSL_CTX verify locations"); 624238106Sdes SSL_CTX_free(ctx); 625238106Sdes return NULL; 626238106Sdes } 627238106Sdes SSL_CTX_set_client_CA_list(ctx, SSL_load_client_CA_file( 628238106Sdes verifypem)); 629238106Sdes SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL); 630238106Sdes } 631238106Sdes return ctx; 632249141Sdes#else 633249141Sdes (void)key; (void)pem; (void)verifypem; 634249141Sdes return NULL; 635249141Sdes#endif 636238106Sdes} 637238106Sdes 638238106Sdesvoid* connect_sslctx_create(char* key, char* pem, char* verifypem) 639238106Sdes{ 640249141Sdes#ifdef HAVE_SSL 641238106Sdes SSL_CTX* ctx = SSL_CTX_new(SSLv23_client_method()); 642238106Sdes if(!ctx) { 643238106Sdes log_crypto_err("could not allocate SSL_CTX pointer"); 644238106Sdes return NULL; 645238106Sdes } 646238106Sdes if(!(SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2)) { 647238106Sdes log_crypto_err("could not set SSL_OP_NO_SSLv2"); 648238106Sdes SSL_CTX_free(ctx); 649238106Sdes return NULL; 650238106Sdes } 651238106Sdes if(key && key[0]) { 652238106Sdes if(!SSL_CTX_use_certificate_file(ctx, pem, SSL_FILETYPE_PEM)) { 653238106Sdes log_err("error in client certificate %s", pem); 654238106Sdes log_crypto_err("error in certificate file"); 655238106Sdes SSL_CTX_free(ctx); 656238106Sdes return NULL; 657238106Sdes } 658238106Sdes if(!SSL_CTX_use_PrivateKey_file(ctx, key, SSL_FILETYPE_PEM)) { 659238106Sdes log_err("error in client private key %s", key); 660238106Sdes log_crypto_err("error in key file"); 661238106Sdes SSL_CTX_free(ctx); 662238106Sdes return NULL; 663238106Sdes } 664238106Sdes if(!SSL_CTX_check_private_key(ctx)) { 665238106Sdes log_err("error in client key %s", key); 666238106Sdes log_crypto_err("error in SSL_CTX_check_private_key"); 667238106Sdes SSL_CTX_free(ctx); 668238106Sdes return NULL; 669238106Sdes } 670238106Sdes } 671238106Sdes if(verifypem && verifypem[0]) { 672238106Sdes if(!SSL_CTX_load_verify_locations(ctx, verifypem, NULL) != 1) { 673238106Sdes log_crypto_err("error in SSL_CTX verify"); 674238106Sdes SSL_CTX_free(ctx); 675238106Sdes return NULL; 676238106Sdes } 677238106Sdes SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL); 678238106Sdes } 679238106Sdes return ctx; 680249141Sdes#else 681249141Sdes (void)key; (void)pem; (void)verifypem; 682249141Sdes return NULL; 683249141Sdes#endif 684238106Sdes} 685238106Sdes 686238106Sdesvoid* incoming_ssl_fd(void* sslctx, int fd) 687238106Sdes{ 688249141Sdes#ifdef HAVE_SSL 689238106Sdes SSL* ssl = SSL_new((SSL_CTX*)sslctx); 690238106Sdes if(!ssl) { 691238106Sdes log_crypto_err("could not SSL_new"); 692238106Sdes return NULL; 693238106Sdes } 694238106Sdes SSL_set_accept_state(ssl); 695238106Sdes (void)SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY); 696238106Sdes if(!SSL_set_fd(ssl, fd)) { 697238106Sdes log_crypto_err("could not SSL_set_fd"); 698238106Sdes SSL_free(ssl); 699238106Sdes return NULL; 700238106Sdes } 701238106Sdes return ssl; 702249141Sdes#else 703249141Sdes (void)sslctx; (void)fd; 704249141Sdes return NULL; 705249141Sdes#endif 706238106Sdes} 707238106Sdes 708238106Sdesvoid* outgoing_ssl_fd(void* sslctx, int fd) 709238106Sdes{ 710249141Sdes#ifdef HAVE_SSL 711238106Sdes SSL* ssl = SSL_new((SSL_CTX*)sslctx); 712238106Sdes if(!ssl) { 713238106Sdes log_crypto_err("could not SSL_new"); 714238106Sdes return NULL; 715238106Sdes } 716238106Sdes SSL_set_connect_state(ssl); 717238106Sdes (void)SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY); 718238106Sdes if(!SSL_set_fd(ssl, fd)) { 719238106Sdes log_crypto_err("could not SSL_set_fd"); 720238106Sdes SSL_free(ssl); 721238106Sdes return NULL; 722238106Sdes } 723238106Sdes return ssl; 724249141Sdes#else 725249141Sdes (void)sslctx; (void)fd; 726249141Sdes return NULL; 727249141Sdes#endif 728238106Sdes} 729249141Sdes 730249141Sdes#if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED) 731249141Sdes/** global lock list for openssl locks */ 732249141Sdesstatic lock_basic_t *ub_openssl_locks = NULL; 733249141Sdes 734249141Sdes/** callback that gets thread id for openssl */ 735249141Sdesstatic unsigned long 736249141Sdesub_crypto_id_cb(void) 737249141Sdes{ 738249141Sdes return (unsigned long)ub_thread_self(); 739249141Sdes} 740249141Sdes 741249141Sdesstatic void 742249141Sdesub_crypto_lock_cb(int mode, int type, const char *ATTR_UNUSED(file), 743249141Sdes int ATTR_UNUSED(line)) 744249141Sdes{ 745249141Sdes if((mode&CRYPTO_LOCK)) { 746249141Sdes lock_basic_lock(&ub_openssl_locks[type]); 747249141Sdes } else { 748249141Sdes lock_basic_unlock(&ub_openssl_locks[type]); 749249141Sdes } 750249141Sdes} 751249141Sdes#endif /* OPENSSL_THREADS */ 752249141Sdes 753249141Sdesint ub_openssl_lock_init(void) 754249141Sdes{ 755249141Sdes#if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED) 756249141Sdes int i; 757249141Sdes ub_openssl_locks = (lock_basic_t*)malloc( 758249141Sdes sizeof(lock_basic_t)*CRYPTO_num_locks()); 759249141Sdes if(!ub_openssl_locks) 760249141Sdes return 0; 761249141Sdes for(i=0; i<CRYPTO_num_locks(); i++) { 762249141Sdes lock_basic_init(&ub_openssl_locks[i]); 763249141Sdes } 764249141Sdes CRYPTO_set_id_callback(&ub_crypto_id_cb); 765249141Sdes CRYPTO_set_locking_callback(&ub_crypto_lock_cb); 766249141Sdes#endif /* OPENSSL_THREADS */ 767249141Sdes return 1; 768249141Sdes} 769249141Sdes 770249141Sdesvoid ub_openssl_lock_delete(void) 771249141Sdes{ 772249141Sdes#if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED) 773249141Sdes int i; 774249141Sdes if(!ub_openssl_locks) 775249141Sdes return; 776249141Sdes CRYPTO_set_id_callback(NULL); 777249141Sdes CRYPTO_set_locking_callback(NULL); 778249141Sdes for(i=0; i<CRYPTO_num_locks(); i++) { 779249141Sdes lock_basic_destroy(&ub_openssl_locks[i]); 780249141Sdes } 781249141Sdes free(ub_openssl_locks); 782249141Sdes#endif /* OPENSSL_THREADS */ 783249141Sdes} 784249141Sdes 785