/** Builds an authentication/accounting request for port id client_port with the value_pairs send and submits it to a server
*
* @param rh a handle to parsed configuration.
* @param client_port the client port number to use (may be zero to use any available).
* @param send a #VALUE_PAIR array of values (e.g., %PW_USER_NAME).
* @param received an allocated array of received values.
* @param msg must be an array of %PW_MAX_MSG_SIZE or %NULL; will contain the concatenation of any
* %PW_REPLY_MESSAGE received.
* @param add_nas_port if non-zero it will include %PW_NAS_PORT in sent pairs.
* @param request_type one of standard RADIUS codes (e.g., %PW_ACCESS_REQUEST).
* @return received value_pairs in received, messages from the server in msg and %OK_RC (0) on success, negative
* on failure as return value.
*/
int rc_aaa(rc_handle *rh, uint32_t client_port, VALUE_PAIR *send, VALUE_PAIR **received,
char *msg, int add_nas_port, int request_type)
{
SEND_DATA data;
VALUE_PAIR *adt_vp = NULL;
int result;
int i, skip_count;
SERVER *aaaserver;
int timeout = rc_conf_int(rh, "radius_timeout");
int retries = rc_conf_int(rh, "radius_retries");
int radius_deadtime = rc_conf_int(rh, "radius_deadtime");
double start_time = 0;
double now = 0;
time_t dtime;
unsigned type;
if (request_type != PW_ACCOUNTING_REQUEST) {
aaaserver = rc_conf_srv(rh, "authserver");
type = AUTH;
} else {
aaaserver = rc_conf_srv(rh, "acctserver");
type = ACCT;
}
if (aaaserver == NULL)
return ERROR_RC;
data.send_pairs = send;
data.receive_pairs = NULL;
if (add_nas_port != 0) {
/*
* Fill in NAS-Port
*/
if (rc_avpair_add(rh, &(data.send_pairs), PW_NAS_PORT,
&client_port, 0, 0) == NULL)
return ERROR_RC;
}
if (request_type == PW_ACCOUNTING_REQUEST) {
/*
* Fill in Acct-Delay-Time
*/
dtime = 0;
now = rc_getmtime();
adt_vp = rc_avpair_get(data.send_pairs, PW_ACCT_DELAY_TIME, 0);
if (adt_vp == NULL) {
adt_vp = rc_avpair_add(rh, &(data.send_pairs),
PW_ACCT_DELAY_TIME, &dtime, 0, 0);
if (adt_vp == NULL)
return ERROR_RC;
start_time = now;
} else {
start_time = now - adt_vp->lvalue;
}
}
skip_count = 0;
result = ERROR_RC;
for (i=0; (i < aaaserver->max) && (result != OK_RC) && (result != REJECT_RC)
; i++, now = rc_getmtime())
{
if (aaaserver->deadtime_ends[i] != -1 &&
aaaserver->deadtime_ends[i] > start_time) {
skip_count++;
continue;
}
if (data.receive_pairs != NULL) {
rc_avpair_free(data.receive_pairs);
data.receive_pairs = NULL;
}
rc_buildreq(rh, &data, request_type, aaaserver->name[i],
aaaserver->port[i], aaaserver->secret[i], timeout, retries);
if (request_type == PW_ACCOUNTING_REQUEST) {
dtime = now - start_time;
rc_avpair_assign(adt_vp, &dtime, 0);
}
result = rc_send_server (rh, &data, msg, type);
if (result == TIMEOUT_RC && radius_deadtime > 0)
aaaserver->deadtime_ends[i] = start_time + (double)radius_deadtime;
}
if (result == OK_RC || result == REJECT_RC || skip_count == 0)
goto exit;
result = ERROR_RC;
for (i=0; (i < aaaserver->max) && (result != OK_RC) && (result != REJECT_RC)
; i++)
{
if (aaaserver->deadtime_ends[i] == -1 ||
aaaserver->deadtime_ends[i] <= start_time) {
continue;
}
if (data.receive_pairs != NULL) {
rc_avpair_free(data.receive_pairs);
data.receive_pairs = NULL;
}
rc_buildreq(rh, &data, request_type, aaaserver->name[i],
aaaserver->port[i], aaaserver->secret[i], timeout, retries);
if (request_type == PW_ACCOUNTING_REQUEST) {
dtime = rc_getmtime() - start_time;
rc_avpair_assign(adt_vp, &dtime, 0);
}
result = rc_send_server (rh, &data, msg, type);
if (result != TIMEOUT_RC)
aaaserver->deadtime_ends[i] = -1;
}
exit:
if (request_type != PW_ACCOUNTING_REQUEST) {
*received = data.receive_pairs;
} else {
rc_avpair_free(data.receive_pairs);
}
return result;
}
/** Sends a request to a RADIUS server and waits for the reply
*
* @param rh a handle to parsed configuration
* @param ctx if non-NULL it will contain the context of sent request; It must be released using rc_aaa_ctx_free().
* @param data a pointer to a SEND_DATA structure
* @param msg must be an array of %PW_MAX_MSG_SIZE or NULL; will contain the concatenation of
* any %PW_REPLY_MESSAGE received.
* @param type must be %AUTH or %ACCT
* @return OK_RC (0) on success, TIMEOUT_RC on timeout REJECT_RC on acess reject, or negative
* on failure as return value.
*/
int rc_send_server_ctx(rc_handle * rh, RC_AAA_CTX ** ctx, SEND_DATA * data,
char *msg, rc_type type)
{
int sockfd = -1;
AUTH_HDR *auth, *recv_auth;
char *server_name, *p; /* Name of server to query */
struct sockaddr_storage our_sockaddr;
struct addrinfo *auth_addr = NULL;
socklen_t salen;
int result = 0;
int total_length;
int length, pos;
int retry_max;
const rc_sockets_override *sfuncs;
unsigned discover_local_ip;
size_t secretlen;
char secret[MAX_SECRET_LENGTH + 1];
unsigned char vector[AUTH_VECTOR_LEN];
uint8_t recv_buffer[BUFFER_LEN];
uint8_t send_buffer[BUFFER_LEN];
uint8_t *attr;
int retries;
VALUE_PAIR *vp;
struct pollfd pfd;
double start_time, timeout;
struct sockaddr_storage *ss_set = NULL;
char *server_type = "auth";
server_name = data->server;
if (server_name == NULL || server_name[0] == '\0')
return ERROR_RC;
if ((vp = rc_avpair_get(data->send_pairs, PW_SERVICE_TYPE, 0)) &&
(vp->lvalue == PW_ADMINISTRATIVE)) {
strcpy(secret, MGMT_POLL_SECRET);
auth_addr =
rc_getaddrinfo(server_name,
type == AUTH ? PW_AI_AUTH : PW_AI_ACCT);
if (auth_addr == NULL)
return ERROR_RC;
} else {
if (data->secret != NULL) {
strlcpy(secret, data->secret, MAX_SECRET_LENGTH);
}
/*
else
{
*/
if (rc_find_server_addr
(rh, server_name, &auth_addr, secret, type) != 0) {
rc_log(LOG_ERR,
"rc_send_server: unable to find server: %s",
server_name);
return ERROR_RC;
}
/*} */
}
sfuncs = &rh->so;
if (sfuncs->static_secret) {
/* any static secret set in sfuncs overrides the configured */
strlcpy(secret, sfuncs->static_secret,
MAX_SECRET_LENGTH);
}
if (sfuncs->lock) {
if (sfuncs->lock(sfuncs->ptr) != 0) {
rc_log(LOG_ERR, "%s: lock error", __func__);
return ERROR_RC;
}
}
rc_own_bind_addr(rh, &our_sockaddr);
discover_local_ip = 0;
if (our_sockaddr.ss_family == AF_INET) {
if (((struct sockaddr_in *)(&our_sockaddr))->sin_addr.s_addr ==
INADDR_ANY) {
discover_local_ip = 1;
}
}
DEBUG(LOG_ERR, "DEBUG: rc_send_server: creating socket to: %s",
server_name);
if (discover_local_ip) {
result = rc_get_srcaddr(SA(&our_sockaddr), auth_addr->ai_addr);
if (result != 0) {
memset(secret, '\0', sizeof(secret));
rc_log(LOG_ERR,
"rc_send_server: cannot figure our own address");
result = ERROR_RC;
goto cleanup;
}
}
if (sfuncs->get_fd) {
sockfd = sfuncs->get_fd(sfuncs->ptr, SA(&our_sockaddr));
if (sockfd < 0) {
memset(secret, '\0', sizeof(secret));
rc_log(LOG_ERR, "rc_send_server: socket: %s",
strerror(errno));
result = ERROR_RC;
goto cleanup;
}
}
retry_max = data->retries; /* Max. numbers to try for reply */
retries = 0; /* Init retry cnt for blocking call */
if (data->svc_port) {
if (our_sockaddr.ss_family == AF_INET)
((struct sockaddr_in *)auth_addr->ai_addr)->sin_port =
htons((unsigned short)data->svc_port);
else
((struct sockaddr_in6 *)auth_addr->ai_addr)->sin6_port =
htons((unsigned short)data->svc_port);
}
/*
* Fill in NAS-IP-Address (if needed)
*/
if (rh->nas_addr_set) {
rc_avpair_remove(&(data->send_pairs), PW_NAS_IP_ADDRESS, 0);
rc_avpair_remove(&(data->send_pairs), PW_NAS_IPV6_ADDRESS, 0);
ss_set = &rh->nas_addr;
} else if (rc_avpair_get(data->send_pairs, PW_NAS_IP_ADDRESS, 0) == NULL &&
rc_avpair_get(data->send_pairs, PW_NAS_IPV6_ADDRESS, 0) == NULL) {
ss_set = &our_sockaddr;
}
if (ss_set) {
if (ss_set->ss_family == AF_INET) {
uint32_t ip;
ip = *((uint32_t
*) (&((struct sockaddr_in *)ss_set)->
sin_addr));
ip = ntohl(ip);
rc_avpair_add(rh, &(data->send_pairs),
PW_NAS_IP_ADDRESS, &ip, 0, 0);
} else {
void *p;
p = &((struct sockaddr_in6 *)ss_set)->sin6_addr;
rc_avpair_add(rh, &(data->send_pairs),
PW_NAS_IPV6_ADDRESS, p, 16, 0);
}
}
/*
* Fill in NAS-Identifier (if needed)
*/
p = rc_conf_str(rh, "nas-identifier");
if (p != NULL) {
rc_avpair_remove(&(data->send_pairs), PW_NAS_IDENTIFIER, 0);
rc_avpair_add(rh, &(data->send_pairs),
PW_NAS_IDENTIFIER, p, -1, 0);
}
/* Build a request */
auth = (AUTH_HDR *) send_buffer;
auth->code = data->code;
auth->id = data->seq_nbr;
if (data->code == PW_ACCOUNTING_REQUEST) {
server_type = "acct";
total_length =
rc_pack_list(data->send_pairs, secret, auth) + AUTH_HDR_LEN;
auth->length = htons((unsigned short)total_length);
memset((char *)auth->vector, 0, AUTH_VECTOR_LEN);
secretlen = strlen(secret);
memcpy((char *)auth + total_length, secret, secretlen);
rc_md5_calc(vector, (unsigned char *)auth,
total_length + secretlen);
memcpy((char *)auth->vector, (char *)vector, AUTH_VECTOR_LEN);
} else {
rc_random_vector(vector);
memcpy((char *)auth->vector, (char *)vector, AUTH_VECTOR_LEN);
total_length =
rc_pack_list(data->send_pairs, secret, auth) + AUTH_HDR_LEN;
auth->length = htons((unsigned short)total_length);
}
if (radcli_debug) {
char our_addr_txt[50] = ""; /* hold a text IP */
char auth_addr_txt[50] = ""; /* hold a text IP */
getnameinfo(SA(&our_sockaddr), SS_LEN(&our_sockaddr), NULL, 0,
our_addr_txt, sizeof(our_addr_txt), NI_NUMERICHOST);
getnameinfo(auth_addr->ai_addr, auth_addr->ai_addrlen, NULL, 0,
auth_addr_txt, sizeof(auth_addr_txt),
NI_NUMERICHOST);
DEBUG(LOG_ERR,
"DEBUG: timeout=%d retries=%d local %s : 0, remote %s : %u\n",
data->timeout, retry_max, our_addr_txt, auth_addr_txt,
data->svc_port);
}
for (;;) {
do {
result =
sfuncs->sendto(sfuncs->ptr, sockfd, (char *)auth,
(unsigned int)total_length, (int)0,
SA(auth_addr->ai_addr),
auth_addr->ai_addrlen);
} while (result == -1 && errno == EINTR);
if (result == -1) {
rc_log(LOG_ERR, "%s: socket: %s", __FUNCTION__,
strerror(errno));
result = ERROR_RC;
goto cleanup;
}
pfd.fd = sockfd;
pfd.events = POLLIN;
pfd.revents = 0;
start_time = rc_getmtime();
for (timeout = data->timeout; timeout > 0;
timeout -= rc_getmtime() - start_time) {
result = poll(&pfd, 1, timeout * 1000);
if (result != -1 || errno != EINTR)
break;
}
if (result == -1) {
rc_log(LOG_ERR, "rc_send_server: poll: %s",
strerror(errno));
memset(secret, '\0', sizeof(secret));
SCLOSE(sockfd);
result = ERROR_RC;
goto cleanup;
}
if (result == 1 && (pfd.revents & POLLIN) != 0) {
salen = auth_addr->ai_addrlen;
do {
length = sfuncs->recvfrom(sfuncs->ptr, sockfd,
(char *)recv_buffer,
(int)
sizeof(recv_buffer),
(int)0,
SA(auth_addr->
ai_addr), &salen);
} while (length == -1 && errno == EINTR);
if (length <= 0) {
int e = errno;
rc_log(LOG_ERR,
"rc_send_server: recvfrom: %s:%d: %s",
server_name, data->svc_port,
strerror(e));
if (length == -1 && (e == EAGAIN || e == EINTR))
continue;
SCLOSE(sockfd);
memset(secret, '\0', sizeof(secret));
result = ERROR_RC;
goto cleanup;
}
recv_auth = (AUTH_HDR *) recv_buffer;
if (length < AUTH_HDR_LEN
|| length < ntohs(recv_auth->length)) {
rc_log(LOG_ERR,
"rc_send_server: recvfrom: %s:%d: reply is too short",
server_name, data->svc_port);
SCLOSE(sockfd);
memset(secret, '\0', sizeof(secret));
result = ERROR_RC;
goto cleanup;
}
result =
rc_check_reply(recv_auth, BUFFER_LEN, secret,
vector, data->seq_nbr);
if (result != BADRESPID_RC) {
/* if a message that doesn't match our ID was received, then ignore
* it, and try to receive more, until timeout. That is because in
* DTLS the channel is shared, and we may receive duplicates or
* out-of-order packets. */
break;
}
}
/*
* Timed out waiting for response. Retry "retry_max" times
* before giving up. If retry_max = 0, don't retry at all.
*/
if (retries++ >= retry_max) {
char radius_server_ip[128];
struct sockaddr_in *si =
(struct sockaddr_in *)auth_addr->ai_addr;
inet_ntop(auth_addr->ai_family, &si->sin_addr,
radius_server_ip, sizeof(radius_server_ip));
rc_log(LOG_ERR,
"rc_send_server: no reply from RADIUS %s server %s:%u",
server_type, radius_server_ip, data->svc_port);
SCLOSE(sockfd);
memset(secret, '\0', sizeof(secret));
result = TIMEOUT_RC;
goto cleanup;
}
}
/*
* If UDP is larger than RADIUS, shorten it to RADIUS.
*/
if (length > ntohs(recv_auth->length))
length = ntohs(recv_auth->length);
/*
* Verify that it's a valid RADIUS packet before doing ANYTHING with it.
*/
attr = recv_buffer + AUTH_HDR_LEN;
while (attr < (recv_buffer + length)) {
if (attr[0] == 0) {
rc_log(LOG_ERR,
"rc_send_server: recvfrom: %s:%d: attribute zero is invalid",
server_name, data->svc_port);
SCLOSE(sockfd);
memset(secret, '\0', sizeof(secret));
result = ERROR_RC;
goto cleanup;
}
if (attr[1] < 2) {
rc_log(LOG_ERR,
"rc_send_server: recvfrom: %s:%d: attribute length is too small",
server_name, data->svc_port);
SCLOSE(sockfd);
memset(secret, '\0', sizeof(secret));
result = ERROR_RC;
goto cleanup;
}
if ((attr + attr[1]) > (recv_buffer + length)) {
rc_log(LOG_ERR,
"rc_send_server: recvfrom: %s:%d: attribute overflows the packet",
server_name, data->svc_port);
SCLOSE(sockfd);
memset(secret, '\0', sizeof(secret));
result = ERROR_RC;
goto cleanup;
}
attr += attr[1];
}
length = ntohs(recv_auth->length) - AUTH_HDR_LEN;
if (length > 0) {
data->receive_pairs = rc_avpair_gen(rh, NULL, recv_auth->data,
length, 0);
} else {
data->receive_pairs = NULL;
}
SCLOSE(sockfd);
result = populate_ctx(ctx, secret, vector);
if (result != OK_RC) {
memset(secret, '\0', sizeof(secret));
goto cleanup;
}
memset(secret, '\0', sizeof(secret));
if (msg) {
*msg = '\0';
pos = 0;
vp = data->receive_pairs;
while (vp) {
if ((vp = rc_avpair_get(vp, PW_REPLY_MESSAGE, 0))) {
strappend(msg, PW_MAX_MSG_SIZE, &pos,
vp->strvalue);
strappend(msg, PW_MAX_MSG_SIZE, &pos, "\n");
vp = vp->next;
}
}
}
if ((recv_auth->code == PW_ACCESS_ACCEPT) ||
(recv_auth->code == PW_PASSWORD_ACK) ||
(recv_auth->code == PW_ACCOUNTING_RESPONSE)) {
result = OK_RC;
} else if ((recv_auth->code == PW_ACCESS_REJECT) ||
(recv_auth->code == PW_PASSWORD_REJECT)) {
result = REJECT_RC;
} else {
rc_log(LOG_ERR, "rc_send_server: received RADIUS server response neither ACCEPT nor REJECT, invalid");
result = BADRESP_RC;
}
cleanup:
if (auth_addr)
freeaddrinfo(auth_addr);
if (sfuncs->unlock) {
if (sfuncs->unlock(sfuncs->ptr) != 0) {
rc_log(LOG_ERR, "%s: unlock error", __func__);
}
}
return result;
}
/** Sends a request to a RADIUS server and waits for the reply
*
* @param rh a handle to parsed configuration
* @param data a pointer to a #SEND_DATA structure
* @param msg must be an array of %PW_MAX_MSG_SIZE or %NULL; will contain the concatenation of
* any %PW_REPLY_MESSAGE received.
* @param flags must be %AUTH or %ACCT
* @return %OK_RC (0) on success, %TIMEOUT_RC on timeout %REJECT_RC on acess reject, or negative
* on failure as return value.
*/
int rc_send_server (rc_handle const *rh, SEND_DATA *data, char *msg, unsigned flags)
{
int sockfd;
AUTH_HDR *auth, *recv_auth;
char *server_name; /* Name of server to query */
struct sockaddr_storage our_sockaddr;
struct addrinfo *auth_addr = NULL;
socklen_t salen;
int result = 0;
int total_length;
int length, pos;
int retry_max;
unsigned discover_local_ip;
size_t secretlen;
char secret[MAX_SECRET_LENGTH + 1];
unsigned char vector[AUTH_VECTOR_LEN];
uint8_t recv_buffer[BUFFER_LEN];
uint8_t send_buffer[BUFFER_LEN];
char our_addr_txt[50]; /* hold a text IP */
char auth_addr_txt[50]; /* hold a text IP */
uint8_t *attr;
int retries;
VALUE_PAIR *vp;
struct pollfd pfd;
double start_time, timeout;
server_name = data->server;
if (server_name == NULL || server_name[0] == '\0')
return ERROR_RC;
if(data->secret != NULL)
{
// no need to look up the secret from configuration
strlcpy(secret, data->secret, MAX_SECRET_LENGTH);
auth_addr = rc_getaddrinfo (server_name, flags==AUTH?PW_AI_AUTH:PW_AI_ACCT);
if(auth_addr == NULL)
{
rc_log(LOG_ERR, "rc_send_server: unable to resolve server: %s", server_name);
return ERROR_RC;
}
}
else if (rc_find_server_addr (rh, server_name, &auth_addr, secret, flags) != 0)
{
rc_log(LOG_ERR, "rc_send_server: unable to find server: %s", server_name);
return ERROR_RC;
}
rc_own_bind_addr(rh, &our_sockaddr);
discover_local_ip = 0;
if (our_sockaddr.ss_family == AF_INET) {
if (((struct sockaddr_in*)(&our_sockaddr))->sin_addr.s_addr == INADDR_ANY) {
discover_local_ip = 1;
}
}
DEBUG(LOG_ERR, "DEBUG: rc_send_server: creating socket to: %s", server_name);
if (discover_local_ip) {
result = rc_get_srcaddr(SA(&our_sockaddr), auth_addr->ai_addr);
if (result != 0) {
memset (secret, '\0', sizeof (secret));
rc_log(LOG_ERR, "rc_send_server: cannot figure our own address");
result = ERROR_RC;
goto cleanup;
}
}
sockfd = socket (our_sockaddr.ss_family, SOCK_DGRAM, 0);
if (sockfd < 0)
{
memset (secret, '\0', sizeof (secret));
rc_log(LOG_ERR, "rc_send_server: socket: %s", strerror(errno));
result = ERROR_RC;
goto cleanup;
}
if (our_sockaddr.ss_family == AF_INET)
((struct sockaddr_in*)&our_sockaddr)->sin_port = 0;
else
((struct sockaddr_in6*)&our_sockaddr)->sin6_port = 0;
if (bind(sockfd, SA(&our_sockaddr), SS_LEN(&our_sockaddr)) < 0)
{
close (sockfd);
memset (secret, '\0', sizeof (secret));
rc_log(LOG_ERR, "rc_send_server: bind: %s: %s", server_name, strerror(errno));
result = ERROR_RC;
goto cleanup;
}
retry_max = data->retries; /* Max. numbers to try for reply */
retries = 0; /* Init retry cnt for blocking call */
if (data->svc_port) {
if (our_sockaddr.ss_family == AF_INET)
((struct sockaddr_in*)auth_addr->ai_addr)->sin_port = htons ((unsigned short) data->svc_port);
else
((struct sockaddr_in6*)auth_addr->ai_addr)->sin6_port = htons ((unsigned short) data->svc_port);
}
/*
* Fill in NAS-IP-Address (if needed)
*/
if (rc_avpair_get(data->send_pairs, PW_NAS_IP_ADDRESS, 0) == NULL &&
rc_avpair_get(data->send_pairs, PW_NAS_IPV6_ADDRESS, 0) == NULL) {
if (our_sockaddr.ss_family == AF_INET) {
uint32_t ip;
ip = *((uint32_t*)(&((struct sockaddr_in*)&our_sockaddr)->sin_addr));
ip = ntohl(ip);
rc_avpair_add(rh, &(data->send_pairs), PW_NAS_IP_ADDRESS,
&ip, 0, 0);
} else {
void *p;
p = &((struct sockaddr_in6*)&our_sockaddr)->sin6_addr;
rc_avpair_add(rh, &(data->send_pairs), PW_NAS_IPV6_ADDRESS,
p, 0, 0);
}
}
/* Build a request */
auth = (AUTH_HDR *) send_buffer;
auth->code = data->code;
auth->id = data->seq_nbr;
if (data->code == PW_ACCOUNTING_REQUEST)
{
total_length = rc_pack_list(data->send_pairs, secret, auth) + AUTH_HDR_LEN;
auth->length = htons ((unsigned short) total_length);
memset((char *) auth->vector, 0, AUTH_VECTOR_LEN);
secretlen = strlen (secret);
memcpy ((char *) auth + total_length, secret, secretlen);
rc_md5_calc (vector, (unsigned char *) auth, total_length + secretlen);
memcpy ((char *) auth->vector, (char *) vector, AUTH_VECTOR_LEN);
}
else
{
rc_random_vector (vector);
memcpy ((char *) auth->vector, (char *) vector, AUTH_VECTOR_LEN);
total_length = rc_pack_list(data->send_pairs, secret, auth) + AUTH_HDR_LEN;
auth->length = htons ((unsigned short) total_length);
}
getnameinfo(SA(&our_sockaddr), SS_LEN(&our_sockaddr), NULL, 0, our_addr_txt, sizeof(our_addr_txt), NI_NUMERICHOST);
getnameinfo(auth_addr->ai_addr, auth_addr->ai_addrlen, NULL, 0, auth_addr_txt, sizeof(auth_addr_txt), NI_NUMERICHOST);
DEBUG(LOG_ERR, "DEBUG: local %s : 0, remote %s : %u\n",
our_addr_txt, auth_addr_txt, data->svc_port);
for (;;)
{
do {
result = sendto (sockfd, (char *) auth, (unsigned int)total_length,
(int) 0, SA(auth_addr->ai_addr), auth_addr->ai_addrlen);
} while (result == -1 && errno == EINTR);
if (result == -1) {
rc_log(LOG_ERR, "%s: socket: %s", __FUNCTION__, strerror(errno));
}
pfd.fd = sockfd;
pfd.events = POLLIN;
pfd.revents = 0;
start_time = rc_getmtime();
for (timeout = data->timeout; timeout > 0;
timeout -= rc_getmtime() - start_time) {
result = poll(&pfd, 1, timeout * 1000);
if (result != -1 || errno != EINTR)
break;
}
if (result == -1)
{
rc_log(LOG_ERR, "rc_send_server: poll: %s", strerror(errno));
memset (secret, '\0', sizeof (secret));
close (sockfd);
result = ERROR_RC;
goto cleanup;
}
if (result == 1 && (pfd.revents & POLLIN) != 0)
break;
/*
* Timed out waiting for response. Retry "retry_max" times
* before giving up. If retry_max = 0, don't retry at all.
*/
if (retries++ >= retry_max)
{
rc_log(LOG_ERR,
"rc_send_server: no reply from RADIUS server %s:%u",
auth_addr_txt, data->svc_port);
close (sockfd);
memset (secret, '\0', sizeof (secret));
result = TIMEOUT_RC;
goto cleanup;
}
}
salen = auth_addr->ai_addrlen;
do {
length = recvfrom (sockfd, (char *) recv_buffer,
(int) sizeof (recv_buffer),
(int) 0, SA(auth_addr->ai_addr), &salen);
} while(length == -1 && errno == EINTR);
if (length <= 0)
{
rc_log(LOG_ERR, "rc_send_server: recvfrom: %s:%d: %s", server_name,\
data->svc_port, strerror(errno));
close (sockfd);
memset (secret, '\0', sizeof (secret));
result = ERROR_RC;
goto cleanup;
}
recv_auth = (AUTH_HDR *)recv_buffer;
if (length < AUTH_HDR_LEN || length < ntohs(recv_auth->length)) {
rc_log(LOG_ERR, "rc_send_server: recvfrom: %s:%d: reply is too short",
server_name, data->svc_port);
close(sockfd);
memset(secret, '\0', sizeof(secret));
result = ERROR_RC;
goto cleanup;
}
/*
* If UDP is larger than RADIUS, shorten it to RADIUS.
*/
if (length > ntohs(recv_auth->length)) length = ntohs(recv_auth->length);
/*
* Verify that it's a valid RADIUS packet before doing ANYTHING with it.
*/
attr = recv_buffer + AUTH_HDR_LEN;
while (attr < (recv_buffer + length)) {
if (attr[0] == 0) {
rc_log(LOG_ERR, "rc_send_server: recvfrom: %s:%d: attribute zero is invalid",
server_name, data->svc_port);
close(sockfd);
memset(secret, '\0', sizeof(secret));
return ERROR_RC;
}
if (attr[1] < 2) {
rc_log(LOG_ERR, "rc_send_server: recvfrom: %s:%d: attribute length is too small",
server_name, data->svc_port);
close(sockfd);
memset(secret, '\0', sizeof(secret));
return ERROR_RC;
}
if ((attr + attr[1]) > (recv_buffer + length)) {
rc_log(LOG_ERR, "rc_send_server: recvfrom: %s:%d: attribute overflows the packet",
server_name, data->svc_port);
close(sockfd);
memset(secret, '\0', sizeof(secret));
return ERROR_RC;
}
attr += attr[1];
}
result = rc_check_reply (recv_auth, BUFFER_LEN, secret, vector, data->seq_nbr);
length = ntohs(recv_auth->length) - AUTH_HDR_LEN;
if (length > 0) {
data->receive_pairs = rc_avpair_gen(rh, NULL, recv_auth->data,
length, 0);
} else {
data->receive_pairs = NULL;
}
close (sockfd);
memset (secret, '\0', sizeof (secret));
if (result != OK_RC) {
goto cleanup;
}
if (msg) {
*msg = '\0';
pos = 0;
vp = data->receive_pairs;
while (vp)
{
if ((vp = rc_avpair_get(vp, PW_REPLY_MESSAGE, 0)))
{
strappend(msg, PW_MAX_MSG_SIZE, &pos, vp->strvalue);
strappend(msg, PW_MAX_MSG_SIZE, &pos, "\n");
vp = vp->next;
}
}
}
if ((recv_auth->code == PW_ACCESS_ACCEPT) ||
(recv_auth->code == PW_PASSWORD_ACK) ||
(recv_auth->code == PW_ACCOUNTING_RESPONSE))
{
result = OK_RC;
}
else if ((recv_auth->code == PW_ACCESS_REJECT) ||
(recv_auth->code == PW_PASSWORD_REJECT))
{
result = REJECT_RC;
}
else
{
rc_log(LOG_ERR, "rc_send_server: received RADIUS server response neither ACCEPT nor REJECT, invalid");
result = BADRESP_RC;
}
cleanup:
if (auth_addr)
freeaddrinfo(auth_addr);
return result;
}
