📄 radius_server.c
字号:
} sess->last_reply = reply; sess->last_from_port = from_port; sess->last_identifier = msg->hdr->identifier; os_memcpy(sess->last_authenticator, msg->hdr->authenticator, 16); } else { data->counters.packets_dropped++; client->counters.packets_dropped++; } if (sess->eap_if->eapSuccess || sess->eap_if->eapFail) { RADIUS_DEBUG("Removing completed session 0x%x after timeout", sess->sess_id); eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess); eloop_register_timeout(10, 0, radius_server_session_remove_timeout, data, sess); } return 0;}static void radius_server_receive_auth(int sock, void *eloop_ctx, void *sock_ctx){ struct radius_server_data *data = eloop_ctx; u8 *buf = NULL; struct sockaddr_storage from; socklen_t fromlen; int len; struct radius_client *client = NULL; struct radius_msg *msg = NULL; char abuf[50]; int from_port = 0; buf = os_malloc(RADIUS_MAX_MSG_LEN); if (buf == NULL) { goto fail; } fromlen = sizeof(from); len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0, (struct sockaddr *) &from, &fromlen); if (len < 0) { perror("recvfrom[radius_server]"); goto fail; }#ifdef CONFIG_IPV6 if (data->ipv6) { struct sockaddr_in6 *from6 = (struct sockaddr_in6 *) &from; if (inet_ntop(AF_INET6, &from6->sin6_addr, abuf, sizeof(abuf)) == NULL) abuf[0] = '\0'; from_port = ntohs(from6->sin6_port); RADIUS_DEBUG("Received %d bytes from %s:%d", len, abuf, from_port); client = radius_server_get_client(data, (struct in_addr *) &from6->sin6_addr, 1); }#endif /* CONFIG_IPV6 */ if (!data->ipv6) { struct sockaddr_in *from4 = (struct sockaddr_in *) &from; os_strlcpy(abuf, inet_ntoa(from4->sin_addr), sizeof(abuf)); from_port = ntohs(from4->sin_port); RADIUS_DEBUG("Received %d bytes from %s:%d", len, abuf, from_port); client = radius_server_get_client(data, &from4->sin_addr, 0); } RADIUS_DUMP("Received data", buf, len); if (client == NULL) { RADIUS_DEBUG("Unknown client %s - packet ignored", abuf); data->counters.invalid_requests++; goto fail; } msg = radius_msg_parse(buf, len); if (msg == NULL) { RADIUS_DEBUG("Parsing incoming RADIUS frame failed"); data->counters.malformed_access_requests++; client->counters.malformed_access_requests++; goto fail; } os_free(buf); buf = NULL; if (wpa_debug_level <= MSG_MSGDUMP) { radius_msg_dump(msg); } if (msg->hdr->code != RADIUS_CODE_ACCESS_REQUEST) { RADIUS_DEBUG("Unexpected RADIUS code %d", msg->hdr->code); data->counters.unknown_types++; client->counters.unknown_types++; goto fail; } data->counters.access_requests++; client->counters.access_requests++; if (radius_msg_verify_msg_auth(msg, (u8 *) client->shared_secret, client->shared_secret_len, NULL)) { RADIUS_DEBUG("Invalid Message-Authenticator from %s", abuf); data->counters.bad_authenticators++; client->counters.bad_authenticators++; goto fail; } if (radius_server_request(data, msg, (struct sockaddr *) &from, fromlen, client, abuf, from_port, NULL) == -2) return; /* msg was stored with the session */fail: if (msg) { radius_msg_free(msg); os_free(msg); } os_free(buf);}static int radius_server_open_socket(int port){ int s; struct sockaddr_in addr; s = socket(PF_INET, SOCK_DGRAM, 0); if (s < 0) { perror("socket"); return -1; } os_memset(&addr, 0, sizeof(addr)); addr.sin_family = AF_INET; addr.sin_port = htons(port); if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) { perror("bind"); close(s); return -1; } return s;}#ifdef CONFIG_IPV6static int radius_server_open_socket6(int port){ int s; struct sockaddr_in6 addr; s = socket(PF_INET6, SOCK_DGRAM, 0); if (s < 0) { perror("socket[IPv6]"); return -1; } os_memset(&addr, 0, sizeof(addr)); addr.sin6_family = AF_INET6; os_memcpy(&addr.sin6_addr, &in6addr_any, sizeof(in6addr_any)); addr.sin6_port = htons(port); if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) { perror("bind"); close(s); return -1; } return s;}#endif /* CONFIG_IPV6 */static void radius_server_free_sessions(struct radius_server_data *data, struct radius_session *sessions){ struct radius_session *session, *prev; session = sessions; while (session) { prev = session; session = session->next; radius_server_session_free(data, prev); }}static void radius_server_free_clients(struct radius_server_data *data, struct radius_client *clients){ struct radius_client *client, *prev; client = clients; while (client) { prev = client; client = client->next; radius_server_free_sessions(data, prev->sessions); os_free(prev->shared_secret); os_free(prev); }}static struct radius_client *radius_server_read_clients(const char *client_file, int ipv6){ FILE *f; const int buf_size = 1024; char *buf, *pos; struct radius_client *clients, *tail, *entry; int line = 0, mask, failed = 0, i; struct in_addr addr;#ifdef CONFIG_IPV6 struct in6_addr addr6;#endif /* CONFIG_IPV6 */ unsigned int val; f = fopen(client_file, "r"); if (f == NULL) { RADIUS_ERROR("Could not open client file '%s'", client_file); return NULL; } buf = os_malloc(buf_size); if (buf == NULL) { fclose(f); return NULL; } clients = tail = NULL; while (fgets(buf, buf_size, f)) { /* Configuration file format: * 192.168.1.0/24 secret * 192.168.1.2 secret * fe80::211:22ff:fe33:4455/64 secretipv6 */ line++; buf[buf_size - 1] = '\0'; pos = buf; while (*pos != '\0' && *pos != '\n') pos++; if (*pos == '\n') *pos = '\0'; if (*buf == '\0' || *buf == '#') continue; pos = buf; while ((*pos >= '0' && *pos <= '9') || *pos == '.' || (*pos >= 'a' && *pos <= 'f') || *pos == ':' || (*pos >= 'A' && *pos <= 'F')) { pos++; } if (*pos == '\0') { failed = 1; break; } if (*pos == '/') { char *end; *pos++ = '\0'; mask = strtol(pos, &end, 10); if ((pos == end) || (mask < 0 || mask > (ipv6 ? 128 : 32))) { failed = 1; break; } pos = end; } else { mask = ipv6 ? 128 : 32; *pos++ = '\0'; } if (!ipv6 && inet_aton(buf, &addr) == 0) { failed = 1; break; }#ifdef CONFIG_IPV6 if (ipv6 && inet_pton(AF_INET6, buf, &addr6) <= 0) { if (inet_pton(AF_INET, buf, &addr) <= 0) { failed = 1; break; } /* Convert IPv4 address to IPv6 */ if (mask <= 32) mask += (128 - 32); os_memset(addr6.s6_addr, 0, 10); addr6.s6_addr[10] = 0xff; addr6.s6_addr[11] = 0xff; os_memcpy(addr6.s6_addr + 12, (char *) &addr.s_addr, 4); }#endif /* CONFIG_IPV6 */ while (*pos == ' ' || *pos == '\t') { pos++; } if (*pos == '\0') { failed = 1; break; } entry = os_zalloc(sizeof(*entry)); if (entry == NULL) { failed = 1; break; } entry->shared_secret = os_strdup(pos); if (entry->shared_secret == NULL) { failed = 1; os_free(entry); break; } entry->shared_secret_len = os_strlen(entry->shared_secret); entry->addr.s_addr = addr.s_addr; if (!ipv6) { val = 0; for (i = 0; i < mask; i++) val |= 1 << (31 - i); entry->mask.s_addr = htonl(val); }#ifdef CONFIG_IPV6 if (ipv6) { int offset = mask / 8; os_memcpy(entry->addr6.s6_addr, addr6.s6_addr, 16); os_memset(entry->mask6.s6_addr, 0xff, offset); val = 0; for (i = 0; i < (mask % 8); i++) val |= 1 << (7 - i); if (offset < 16) entry->mask6.s6_addr[offset] = val; }#endif /* CONFIG_IPV6 */ if (tail == NULL) { clients = tail = entry; } else { tail->next = entry; tail = entry; } } if (failed) { RADIUS_ERROR("Invalid line %d in '%s'", line, client_file); radius_server_free_clients(NULL, clients); clients = NULL; } os_free(buf); fclose(f); return clients;}struct radius_server_data *radius_server_init(struct radius_server_conf *conf){ struct radius_server_data *data;#ifndef CONFIG_IPV6 if (conf->ipv6) { fprintf(stderr, "RADIUS server compiled without IPv6 " "support.\n"); return NULL; }#endif /* CONFIG_IPV6 */ data = os_zalloc(sizeof(*data)); if (data == NULL) return NULL; os_get_time(&data->start_time); data->conf_ctx = conf->conf_ctx; data->eap_sim_db_priv = conf->eap_sim_db_priv; data->ssl_ctx = conf->ssl_ctx; data->ipv6 = conf->ipv6; if (conf->pac_opaque_encr_key) { data->pac_opaque_encr_key = os_malloc(16); os_memcpy(data->pac_opaque_encr_key, conf->pac_opaque_encr_key, 16); } if (conf->eap_fast_a_id) data->eap_fast_a_id = os_strdup(conf->eap_fast_a_id); data->get_eap_user = conf->get_eap_user; data->eap_sim_aka_result_ind = conf->eap_sim_aka_result_ind; data->tnc = conf->tnc; data->clients = radius_server_read_clients(conf->client_file, conf->ipv6); if (data->clients == NULL) { printf("No RADIUS clients configured.\n"); radius_server_deinit(data); return NULL; }#ifdef CONFIG_IPV6 if (conf->ipv6) data->auth_sock = radius_server_open_socket6(conf->auth_port); else#endif /* CONFIG_IPV6 */ data->auth_sock = radius_server_open_socket(conf->auth_port); if (data->auth_sock < 0) { printf("Failed to open UDP socket for RADIUS authentication " "server\n"); radius_server_deinit(data); return NULL; } if (eloop_register_read_sock(data->auth_sock, radius_server_receive_auth, data, NULL)) { radius_server_deinit(data); return NULL; } return data;}void radius_server_deinit(struct radius_server_data *data){ if (data == NULL) return; if (data->auth_sock >= 0) { eloop_unregister_read_sock(data->auth_sock); close(data->auth_sock); } radius_server_free_clients(data, data->clients); os_free(data->pac_opaque_encr_key); os_free(data->eap_fast_a_id); os_free(data);}int radius_server_get_mib(struct radius_server_data *data, char *buf, size_t buflen){ int ret, uptime; unsigned int idx; char *end, *pos; struct os_time now; struct radius_client *cli; /* RFC 2619 - RADIUS Authentication Server MIB */ if (data == NULL || buflen == 0) return 0; pos = buf; end = buf + buflen; os_get_time(&now); uptime = (now.sec - data->start_time.sec) * 100 + ((now.usec - data->start_time.usec) / 10000) % 100; ret = os_snprintf(pos, end - pos, "RADIUS-AUTH-SERVER-MIB\n" "radiusAuthServIdent=hostapd\n" "radiusAuthServUpTime=%d\n" "radiusAuthServResetTime=0\n" "radiusAuthServConfigReset=4\n", uptime); if (ret < 0 || ret >= end - pos) { *pos = '\0'; return pos - buf; } pos += ret; ret = os_snprintf(pos, end - pos, "radiusAuthServTotalAccessRequests=%u\n" "radiusAuthServTotalInvalidRequests=%u\n" "radiusAuthServTotalDupAccessRequests=%u\n" "radiusAuthServTotalAccessAccepts=%u\n" "radiusAuthServTotalAccessRejects=%u\n" "radiusAuthServTotalAccessChallenges=%u\n" "radiusAuthServTotalMalformedAccessRequests=%u\n" "radiusAuthServTotalBadAuthenticators=%u\n" "radiusAuthServTotalPacketsDropped=%u\n" "radiusAuthServTotalUnknownTypes=%u\n", data->counters.access_requests, data->counters.invalid_requests, data->counters.dup_access_requests, data->counters.access_accepts, data->counters.access_rejects, data->counters.access_challenges, data->counters.malformed_access_requests, data->counters.bad_authenticators, data->counters.packets_dropped, data->counters.unknown_types); if (ret < 0 || ret >= end - pos) { *pos = '\0'; return pos - buf; } pos += ret; for (cli = data->clients, idx = 0; cli; cli = cli->next, idx++) { char abuf[50], mbuf[50];#ifdef CONFIG_IPV6 if (data->ipv6) { if (inet_ntop(AF_INET6, &cli->addr6, abuf, sizeof(abuf)) == NULL) abuf[0] = '\0'; if (inet_ntop(AF_INET6, &cli->mask6, abuf, sizeof(mbuf)) == NULL) mbuf[0] = '\0'; }#endif /* CONFIG_IPV6 */ if (!data->ipv6) { os_strlcpy(abuf, inet_ntoa(cli->addr), sizeof(abuf)); os_strlcpy(mbuf, inet_ntoa(cli->mask), sizeof(mbuf)); } ret = os_snprintf(pos, end - pos, "radiusAuthClientIndex=%u\n" "radiusAuthClientAddress=%s/%s\n" "radiusAuthServAccessRequests=%u\n" "radiusAuthServDupAccessRequests=%u\n" "radiusAuthServAccessAccepts=%u\n" "radiusAuthServAccessRejects=%u\n" "radiusAuthServAccessChallenges=%u\n" "radiusAuthServMalformedAccessRequests=%u\n" "radiusAuthServBadAuthenticators=%u\n" "radiusAuthServPacketsDropped=%u\n" "radiusAuthServUnknownTypes=%u\n", idx, abuf, mbuf, cli->counters.access_requests, cli->counters.dup_access_requests, cli->counters.access_accepts, cli->counters.access_rejects, cli->counters.access_challenges, cli->counters.malformed_access_requests, cli->counters.bad_authenticators, cli->counters.packets_dropped, cli->counters.unknown_types); if (ret < 0 || ret >= end - pos) { *pos = '\0'; return pos - buf; } pos += ret; } return pos - buf;}static int radius_server_get_eap_user(void *ctx, const u8 *identity, size_t identity_len, int phase2, struct eap_user *user){ struct radius_session *sess = ctx; struct radius_server_data *data = sess->server; return data->get_eap_user(data->conf_ctx, identity, identity_len, phase2, user);}static struct eapol_callbacks radius_server_eapol_cb ={ .get_eap_user = radius_server_get_eap_user,};void radius_server_eap_pending_cb(struct radius_server_data *data, void *ctx){ struct radius_client *cli; struct radius_session *s, *sess = NULL; struct radius_msg *msg; if (data == NULL) return; for (cli = data->clients; cli; cli = cli->next) { for (s = cli->sessions; s; s = s->next) { if (s->eap == ctx && s->last_msg) { sess = s; break; } if (sess) break; } if (sess) break; } if (sess == NULL) { RADIUS_DEBUG("No session matched callback ctx"); return; } msg = sess->last_msg; sess->last_msg = NULL; eap_sm_pending_cb(sess->eap); if (radius_server_request(data, msg, (struct sockaddr *) &sess->last_from, sess->last_fromlen, cli, sess->last_from_addr, sess->last_from_port, sess) == -2) return; /* msg was stored with the session */ radius_msg_free(msg); os_free(msg);}
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -