X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/fe6177d6ec0e0f81a176a15c372f5a4535ebd8b3..8321e71491fd2257db39966a511b1a1afcf44722:/radius.c?ds=inline diff --git a/radius.c b/radius.c index 0bafc61..93a1cde 100644 --- a/radius.c +++ b/radius.c @@ -1,6 +1,6 @@ // L2TPNS Radius Stuff -char const *cvs_id_radius = "$Id: radius.c,v 1.35 2005/06/30 06:13:40 bodea Exp $"; +char const *cvs_id_radius = "$Id: radius.c,v 1.56 2009/12/08 14:49:28 bodea Exp $"; #include #include @@ -27,10 +27,43 @@ extern configt *config; extern int *radfds; extern ip_filtert *ip_filters; +static const hasht zero; + +static void calc_auth(const void *buf, size_t len, const uint8_t *in, uint8_t *out) +{ + MD5_CTX ctx; + + MD5_Init(&ctx); + MD5_Update(&ctx, (void *)buf, 4); // code, id, length + MD5_Update(&ctx, (void *)in, 16); // auth + MD5_Update(&ctx, (void *)(buf + 20), len - 20); + MD5_Update(&ctx, config->radiussecret, strlen(config->radiussecret)); + MD5_Final(out, &ctx); +} + // Set up socket for radius requests void initrad(void) { int i; + uint16_t port = 0; + uint16_t min = config->radius_bind_min; + uint16_t max = config->radius_bind_max; + int inc = 1; + struct sockaddr_in addr; + + if (min) + { + port = min; + if (!max) + max = ~0 - 1; + } + else if (max) /* no minimum specified, bind from max down */ + { + port = max; + min = 1; + inc = -1; + } + LOG(3, 0, 0, "Creating %d sockets for RADIUS queries\n", RADIUS_FDS); radfds = calloc(sizeof(int), RADIUS_FDS); for (i = 0; i < RADIUS_FDS; i++) @@ -39,6 +72,27 @@ void initrad(void) radfds[i] = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); flags = fcntl(radfds[i], F_GETFL, 0); fcntl(radfds[i], F_SETFL, flags | O_NONBLOCK); + + if (port) + { + int b; + + memset(&addr, 0, sizeof(addr)); + addr.sin_family = AF_INET; + addr.sin_addr.s_addr = INADDR_ANY; + + do { + addr.sin_port = htons(port); + if ((b = bind(radfds[i], (struct sockaddr *) &addr, sizeof(addr))) < 0) + { + if ((port += inc) < min || port > max) + { + LOG(0, 0, 0, "Can't bind RADIUS socket in range %u-%u\n", min, max); + exit(1); + } + } + } while (b < 0); + } } } @@ -123,7 +177,7 @@ void radiussend(uint16_t r, uint8_t state) return; } - if (state != RADIUSAUTH && !config->radius_accounting) + if (state != RADIUSAUTH && state != RADIUSJUSTAUTH && !config->radius_accounting) { // Radius accounting is turned off radiusclear(r, s); @@ -143,8 +197,8 @@ void radiussend(uint16_t r, uint8_t state) { if (s) { - if (state == RADIUSAUTH) - sessionshutdown(s, "RADIUS timeout.", 3, 0); + if (state == RADIUSAUTH || state == RADIUSJUSTAUTH) + sessionshutdown(s, "RADIUS timeout.", CDN_ADMIN_DISC, TERM_REAUTHENTICATION_FAILURE); else { LOG(1, s, session[s].tunnel, "RADIUS timeout, but in state %s so don't timeout session\n", @@ -165,6 +219,7 @@ void radiussend(uint16_t r, uint8_t state) switch (state) { case RADIUSAUTH: + case RADIUSJUSTAUTH: b[0] = AccessRequest; // access request break; case RADIUSSTART: @@ -182,10 +237,10 @@ void radiussend(uint16_t r, uint8_t state) { *p = 1; // user name p[1] = strlen(session[s].user) + 2; - strcpy(p + 2, session[s].user); + strcpy((char *) p + 2, session[s].user); p += p[1]; } - if (state == RADIUSAUTH) + if (state == RADIUSAUTH || state == RADIUSJUSTAUTH) { if (radius[r].chap) { @@ -212,13 +267,13 @@ void radiussend(uint16_t r, uint8_t state) while (p < pl) { MD5_CTX ctx; - MD5Init(&ctx); - MD5Update(&ctx, config->radiussecret, strlen(config->radiussecret)); + MD5_Init(&ctx); + MD5_Update(&ctx, config->radiussecret, strlen(config->radiussecret)); if (p) - MD5Update(&ctx, pass + p - 16, 16); + MD5_Update(&ctx, pass + p - 16, 16); else - MD5Update(&ctx, radius[r].auth, 16); - MD5Final(hash, &ctx); + MD5_Update(&ctx, radius[r].auth, 16); + MD5_Final(hash, &ctx); do { pass[p] ^= hash[p & 15]; @@ -234,8 +289,8 @@ void radiussend(uint16_t r, uint8_t state) p += p[1]; } } - else if (state == RADIUSSTART || state == RADIUSSTOP || state == RADIUSINTERIM) - { // accounting + else // accounting + { *p = 40; // accounting type p[1] = 6; *(uint32_t *) (p + 2) = htonl(state - RADIUSSTART + 1); // start=1, stop=2, interim=3 @@ -244,7 +299,7 @@ void radiussend(uint16_t r, uint8_t state) { *p = 44; // session ID p[1] = 18; - sprintf(p + 2, "%08X%08X", session[s].unique_id, session[s].opened); + sprintf((char *) p + 2, "%08X%08X", session[s].unique_id, session[s].opened); p += p[1]; if (state == RADIUSSTART) { // start @@ -265,13 +320,11 @@ void radiussend(uint16_t r, uint8_t state) p[1] = 6; *(uint32_t *) (p + 2) = htonl(session[s].cout); p += p[1]; - if (state == RADIUSSTOP) - { - *p = 46; // session time - p[1] = 6; - *(uint32_t *) (p + 2) = htonl(time(NULL) - session[s].opened); - p += p[1]; - } + + *p = 46; // session time + p[1] = 6; + *(uint32_t *) (p + 2) = htonl(time(NULL) - session[s].opened); + p += p[1]; *p = 47; // input packets p[1] = 6; @@ -292,56 +345,116 @@ void radiussend(uint16_t r, uint8_t state) p[1] = 6; *(uint32_t *) (p + 2) = htonl(session[s].cout_wrap); p += p[1]; + + if (state == RADIUSSTOP && radius[r].term_cause) + { + *p = 49; // acct-terminate-cause + p[1] = 6; + *(uint32_t *) (p + 2) = htonl(radius[r].term_cause); + p += p[1]; + + if (radius[r].term_msg) + { + *p = 26; // vendor-specific + *(uint32_t *) (p + 2) = htonl(9); // Cisco + p[6] = 1; // Cisco-AVPair + p[7] = 2 + sprintf((char *) p + 8, "disc-cause-ext=%s", radius[r].term_msg); + p[1] = p[7] + 6; + p += p[1]; + } + } } - if (session[s].snoop_ip && session[s].snoop_port) { - *p = 26; // vendor-specific - *(uint32_t *) (p + 2) = htonl(9); // Cisco - p[6] = 1; // Cisco-AVPair - p[7] = 2 + sprintf(p + 8, "intercept=%s:%d", - fmtaddr(session[s].snoop_ip, 0), session[s].snoop_port); - - p[1] = p[7] + 6; - p += p[1]; + struct param_radius_account acct = { &tunnel[session[s].tunnel], &session[s], &p }; + run_plugins(PLUGIN_RADIUS_ACCOUNT, &acct); } } } + if (s) { - *p = 5; // NAS-Port + *p = 5; // NAS-Port p[1] = 6; *(uint32_t *) (p + 2) = htonl(s); p += p[1]; - } - if (s && session[s].ip) - { - *p = 8; // Framed-IP-Address + + *p = 6; // Service-Type p[1] = 6; - *(uint32_t *) (p + 2) = htonl(session[s].ip); - p += p[1]; - } - if (*session[s].called) - { - *p = 30; // called - p[1] = strlen(session[s].called) + 2; - strcpy(p + 2, session[s].called); + *(uint32_t *) (p + 2) = htonl((state == RADIUSJUSTAUTH ? 8 : 2)); // Authenticate only or Framed-User respectevily p += p[1]; - } - if (*radius[r].calling) - { - *p = 31; // calling - p[1] = strlen(radius[r].calling) + 2; - strcpy(p + 2, radius[r].calling); - p += p[1]; - } - else if (*session[s].calling) - { - *p = 31; // calling - p[1] = strlen(session[s].calling) + 2; - strcpy(p + 2, session[s].calling); + + *p = 7; // Framed-Protocol + p[1] = htonl((state == RADIUSJUSTAUTH ? 0 : 6)); + *(uint32_t *) (p + 2) = htonl((state == RADIUSJUSTAUTH ? 0 : 1)); // PPP p += p[1]; + + if (session[s].ip) + { + *p = 8; // Framed-IP-Address + p[1] = 6; + *(uint32_t *) (p + 2) = htonl(session[s].ip); + p += p[1]; + } + + if (session[s].route[0].ip) + { + int r; + for (r = 0; s && r < MAXROUTE && session[s].route[r].ip; r++) + { + int width = 32; + if (session[s].route[r].mask) + { + int mask = session[s].route[r].mask; + while (!(mask & 1)) + { + width--; + mask >>= 1; + } + } + + *p = 22; // Framed-Route + p[1] = sprintf((char *) p + 2, "%s/%d %s 1", + fmtaddr(htonl(session[s].route[r].ip), 0), + width, fmtaddr(htonl(session[s].ip), 1)) + 2; + + p += p[1]; + } + } + + if (session[s].session_timeout) + { + *p = 27; // Session-Timeout + p[1] = 6; + *(uint32_t *) (p + 2) = htonl(session[s].session_timeout); + p += p[1]; + } + + if (session[s].idle_timeout) + { + *p = 28; // Idle-Timeout + p[1] = 6; + *(uint32_t *) (p + 2) = htonl(session[s].idle_timeout); + p += p[1]; + } + + if (*session[s].called) + { + *p = 30; // called + p[1] = strlen(session[s].called) + 2; + strcpy((char *) p + 2, session[s].called); + p += p[1]; + } + + if (*session[s].calling) + { + *p = 31; // calling + p[1] = strlen(session[s].calling) + 2; + strcpy((char *) p + 2, session[s].calling); + p += p[1]; + } } + // NAS-IP-Address *p = 4; p[1] = 6; @@ -350,20 +463,11 @@ void radiussend(uint16_t r, uint8_t state) // All AVpairs added *(uint16_t *) (b + 2) = htons(p - b); - if (state != RADIUSAUTH) + if (state != RADIUSAUTH && state != RADIUSJUSTAUTH) { - // Build auth for accounting packet - char z[16] = {0}; - char hash[16] = {0}; - MD5_CTX ctx; - MD5Init(&ctx); - MD5Update(&ctx, b, 4); - MD5Update(&ctx, z, 16); - MD5Update(&ctx, b + 20, (p - b) - 20); - MD5Update(&ctx, config->radiussecret, strlen(config->radiussecret)); - MD5Final(hash, &ctx); - memcpy(b + 4, hash, 16); - memcpy(radius[r].auth, hash, 16); + // Build auth for accounting packet + calc_auth(b, p - b, zero, b + 4); + memcpy(radius[r].auth, b + 4, 16); } memset(&addr, 0, sizeof(addr)); addr.sin_family = AF_INET; @@ -372,7 +476,7 @@ void radiussend(uint16_t r, uint8_t state) // get radius port uint16_t port = config->radiusport[(radius[r].try - 1) % config->numradiusservers]; // assume RADIUS accounting port is the authentication port +1 - addr.sin_port = htons((state == RADIUSAUTH) ? port : port+1); + addr.sin_port = htons((state == RADIUSAUTH || state == RADIUSJUSTAUTH) ? port : port+1); } LOG_HEX(5, "RADIUS Send", b, (p - b)); @@ -381,9 +485,9 @@ void radiussend(uint16_t r, uint8_t state) static void handle_avpair(sessionidt s, uint8_t *avp, int len) { - char *key = avp; - char *value = memchr(avp, '=', len); - char tmp[2048] = ""; + uint8_t *key = avp; + uint8_t *value = memchr(avp, '=', len); + uint8_t tmp[2048] = ""; if (value) { @@ -415,7 +519,7 @@ static void handle_avpair(sessionidt s, uint8_t *avp, int len) // Run hooks { - struct param_radius_response p = { &tunnel[session[s].tunnel], &session[s], key, value }; + struct param_radius_response p = { &tunnel[session[s].tunnel], &session[s], (char *) key, (char *) value }; run_plugins(PLUGIN_RADIUS_RESPONSE, &p); } } @@ -423,8 +527,7 @@ static void handle_avpair(sessionidt s, uint8_t *avp, int len) // process RADIUS response void processrad(uint8_t *buf, int len, char socket_index) { - uint8_t b[MAXCONTROL]; - MD5_CTX ctx; + uint8_t b[MAXETHER]; uint16_t r; sessionidt s; tunnelidt t = 0; @@ -456,19 +559,14 @@ void processrad(uint8_t *buf, int len, char socket_index) LOG(1, s, session[s].tunnel, " Unexpected RADIUS response\n"); return; } - if (radius[r].state != RADIUSAUTH && radius[r].state != RADIUSSTART + if (radius[r].state != RADIUSAUTH && radius[r].state != RADIUSJUSTAUTH && radius[r].state != RADIUSSTART && radius[r].state != RADIUSSTOP && radius[r].state != RADIUSINTERIM) { LOG(1, s, session[s].tunnel, " Unexpected RADIUS response\n"); return; } t = session[s].tunnel; - MD5Init(&ctx); - MD5Update(&ctx, buf, 4); - MD5Update(&ctx, radius[r].auth, 16); - MD5Update(&ctx, buf + 20, len - 20); - MD5Update(&ctx, config->radiussecret, strlen(config->radiussecret)); - MD5Final(hash, &ctx); + calc_auth(buf, len, radius[r].auth, hash); do { if (memcmp(hash, buf + 4, 16)) { @@ -476,7 +574,7 @@ void processrad(uint8_t *buf, int len, char socket_index) return; // Do nothing. On timeout, it will try the next radius server. } - if ((radius[r].state == RADIUSAUTH && r_code != AccessAccept && r_code != AccessReject) || + if (((radius[r].state == RADIUSAUTH ||radius[r].state == RADIUSJUSTAUTH) && r_code != AccessAccept && r_code != AccessReject) || ((radius[r].state == RADIUSSTART || radius[r].state == RADIUSSTOP || radius[r].state == RADIUSINTERIM) && r_code != AccountingResponse)) { LOG(1, s, session[s].tunnel, " Unexpected RADIUS response %s\n", radius_code(r_code)); @@ -484,7 +582,7 @@ void processrad(uint8_t *buf, int len, char socket_index) // care off finishing the radius session if that's really correct. } - if (radius[r].state == RADIUSAUTH) + if (radius[r].state == RADIUSAUTH || radius[r].state == RADIUSJUSTAUTH) { // run post-auth plugin struct param_post_auth packet = { @@ -502,7 +600,7 @@ void processrad(uint8_t *buf, int len, char socket_index) if (radius[r].chap) { // CHAP - uint8_t *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPCHAP); + uint8_t *p = makeppp(b, sizeof(b), 0, 0, s, t, PPPCHAP, 0, 0, 0); if (!p) return; // Abort! *p = (r_code == AccessAccept) ? 3 : 4; // ack/nak @@ -516,7 +614,7 @@ void processrad(uint8_t *buf, int len, char socket_index) else { // PAP - uint8_t *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPPAP); + uint8_t *p = makeppp(b, sizeof(b), 0, 0, s, t, PPPPAP, 0, 0, 0); if (!p) return; // Abort! // ack/nak @@ -538,6 +636,35 @@ void processrad(uint8_t *buf, int len, char socket_index) uint8_t *e = buf + len; for (; p + 2 <= e && p[1] && p + p[1] <= e; p += p[1]) { + if (*p == 26 && p[1] >= 7) + { + // Vendor-Specific Attribute + uint32_t vendor = ntohl(*(int *)(p + 2)); + uint8_t attrib = *(p + 6); + int attrib_length = *(p + 7) - 2; + + LOG(4, s, session[s].tunnel, " Radius reply contains Vendor-Specific. Vendor=%u Attrib=%u Length=%d\n", vendor, attrib, attrib_length); + if (vendor == 9 && attrib == 1) // Cisco-AVPair + { + if (attrib_length < 0) continue; + LOG(3, s, session[s].tunnel, " Cisco-AVPair value: %.*s\n", + attrib_length, p + 8); + + handle_avpair(s, p + 8, attrib_length); + continue; + } + else if (vendor == 529 && attrib >= 135 && attrib <= 136) // Ascend + { + // handle old-format ascend DNS attributes below + p += 6; + } + else + { + LOG(3, s, session[s].tunnel, " Unknown vendor-specific\n"); + continue; + } + } + if (*p == 8) { // Framed-IP-Address @@ -617,7 +744,7 @@ void processrad(uint8_t *buf, int len, char socket_index) else if (*p == 11) { // Filter-Id - char *filter = p + 2; + char *filter = (char *) p + 2; int l = p[1] - 2; char *suffix; int f; @@ -651,27 +778,21 @@ void processrad(uint8_t *buf, int len, char socket_index) ip_filters[f].used++; } } - else if (*p == 26 && p[1] >= 7) + else if (*p == 27) { - // Vendor-Specific Attribute - int vendor = ntohl(*(int *)(p + 2)); - char attrib = *(p + 6); - int attrib_length = *(p + 7) - 2; - - LOG(3, s, session[s].tunnel, " Radius reply contains Vendor-Specific. Vendor=%d Attrib=%d Length=%d\n", vendor, attrib, attrib_length); - if (vendor != 9 || attrib != 1) - { - LOG(3, s, session[s].tunnel, " Unknown vendor-specific\n"); - continue; - } - - if (attrib_length > 0) - { - LOG(3, s, session[s].tunnel, " Cisco-AVPair value: %.*s\n", - attrib_length, p + 8); - - handle_avpair(s, p + 8, attrib_length); - } + // Session-Timeout + if (p[1] < 6) continue; + session[s].session_timeout = ntohl(*(uint32_t *)(p + 2)); + LOG(3, s, session[s].tunnel, " Radius reply contains Session-Timeout = %u\n", session[s].session_timeout); + if(!session[s].session_timeout && config->kill_timedout_sessions) + sessionshutdown(s, "Session timeout is zero", CDN_ADMIN_DISC, 0); + } + else if (*p == 28) + { + // Idle-Timeout + if (p[1] < 6) continue; + session[s].idle_timeout = ntohl(*(uint32_t *)(p + 2)); + LOG(3, s, session[s].tunnel, " Radius reply contains Idle-Timeout = %u\n", session[s].idle_timeout); } else if (*p == 99) { @@ -680,10 +801,10 @@ void processrad(uint8_t *buf, int len, char socket_index) int prefixlen; uint8_t *n = p + 2; uint8_t *e = p + p[1]; - uint8_t *m = strchr(n, '/'); + uint8_t *m = memchr(n, '/', e - p); *m++ = 0; - inet_pton(AF_INET6, n, &r6); + inet_pton(AF_INET6, (char *) n, &r6); prefixlen = 0; while (m < e && isdigit(*m)) { @@ -710,18 +831,18 @@ void processrad(uint8_t *buf, int len, char socket_index) if (!session[s].dns1 && config->default_dns1) { - session[s].dns1 = htonl(config->default_dns1); + session[s].dns1 = ntohl(config->default_dns1); LOG(3, s, t, " Sending dns1 = %s\n", fmtaddr(config->default_dns1, 0)); } if (!session[s].dns2 && config->default_dns2) { - session[s].dns2 = htonl(config->default_dns2); + session[s].dns2 = ntohl(config->default_dns2); LOG(3, s, t, " Sending dns2 = %s\n", fmtaddr(config->default_dns2, 0)); } // Valid Session, set it up session[s].unique_id = 0; - sessionsetup(t, s); + sessionsetup(s, t); } else { @@ -748,22 +869,14 @@ void radiusretry(uint16_t r) switch (radius[r].state) { case RADIUSCHAP: // sending CHAP down PPP - sendchap(t, s); - break; - case RADIUSIPCP: - sendipcp(t, s); // send IPCP + sendchap(s, t); break; case RADIUSAUTH: // sending auth to RADIUS server - radiussend(r, RADIUSAUTH); - break; + case RADIUSJUSTAUTH: // sending auth to RADIUS server case RADIUSSTART: // sending start accounting to RADIUS server - radiussend(r, RADIUSSTART); - break; case RADIUSSTOP: // sending stop accounting to RADIUS server - radiussend(r, RADIUSSTOP); - break; case RADIUSINTERIM: // sending interim accounting to RADIUS server - radiussend(r, RADIUSINTERIM); + radiussend(r, radius[r].state); break; default: case RADIUSNULL: // Not in use @@ -777,11 +890,11 @@ void radiusretry(uint16_t r) extern int daefd; -void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen) +void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen, struct in_addr *local) { int i, r_code, r_id, length, attribute_length; - uint8_t vector[16], hash[16], *packet, attribute; - MD5_CTX ctx; + uint8_t *packet, attribute; + hasht hash; char username[MAXUSER] = ""; in_addr_t nas = 0; in_addr_t ip = 0; @@ -826,17 +939,8 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen) LOG(3, 0, 0, "Received DAE %s, id %d\n", radius_code(r_code), r_id); // check authenticator - memcpy(vector, buf + 4, 16); - memset(buf + 4, 0, 16); - - i = strlen(config->radiussecret); - if (i > 16) i = 16; - - MD5Init(&ctx); - MD5Update(&ctx, buf, len); - MD5Update(&ctx, buf, config->radiussecret, i); - MD5Final(hash, &ctx); - if (memcmp(hash, vector, 16) != 0) + calc_auth(buf, len, zero, hash); + if (memcmp(hash, buf + 4, 16) != 0) { LOG(1, 0, 0, "Incorrect vector in DAE request (wrong secret in radius config?)\n"); return; @@ -903,7 +1007,7 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen) } len = p - packet; - i = find_filter(packet, len); + i = find_filter((char *) packet, len); if (i < 0 || !*ip_filters[i].name) { error = 404; @@ -995,7 +1099,7 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen) LOG(3, s, t, " DAE Disconnect %d (%s)\n", s, session[s].user); r_code = DisconnectACK; - sessionshutdown(s, "Requested by PoD", 3, 0); // disconnect session + sessionshutdown(s, "Requested by PoD", CDN_ADMIN_DISC, TERM_ADMIN_RESET); // disconnect session break; case CoARequest: // Change of Authorization @@ -1015,20 +1119,17 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen) } // apply filters - if (fin != -1 || fout != -1) - { - if (fin == -1) - fin = 0; - else - LOG(3, s, t, " Filter in %d (%s)\n", fin, ip_filters[fin - 1].name); + if (fin == -1) + fin = 0; + else + LOG(3, s, t, " Filter in %d (%s)\n", fin, ip_filters[fin - 1].name); - if (fout == -1) - fout = 0; - else - LOG(3, s, t, " Filter out %d (%s)\n", fout, ip_filters[fout - 1].name); + if (fout == -1) + fout = 0; + else + LOG(3, s, t, " Filter out %d (%s)\n", fout, ip_filters[fout - 1].name); - filter_session(s, fin, fout); - } + filter_session(s, fin, fout); // process cisco av-pair(s) for (i = 0; i < avp; i++) @@ -1045,10 +1146,9 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen) packet = buf; *packet++ = r_code; *packet++ = r_id; - packet += 2; - memset(packet, 0, 16); - packet += 16; - len = 20; + // skip len + auth + packet += 2 + 16; + len = packet - buf; // add attributes if (error) @@ -1063,18 +1163,11 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen) *((uint16_t *)(buf + 2)) = htons(len); // make vector - i = strlen(config->radiussecret); - if (i > 16) i = 16; - - MD5Init(&ctx); - MD5Update(&ctx, buf, len); - MD5Update(&ctx, config->radiussecret, i); - MD5Final(hash, &ctx); - memcpy(buf + 4, hash, 16); + calc_auth(buf, len, hash, buf + 4); LOG(3, 0, 0, "Sending DAE %s, id=%d\n", radius_code(r_code), r_id); // send DAE response - if (sendto(daefd, buf, len, MSG_DONTWAIT | MSG_NOSIGNAL, (struct sockaddr *) addr, alen) < 0) + if (sendtofrom(daefd, buf, len, MSG_DONTWAIT | MSG_NOSIGNAL, (struct sockaddr *) addr, alen, local) < 0) LOG(0, 0, 0, "Error sending DAE response packet: %s\n", strerror(errno)); }