/** Takes attribute/value pairs from buffer and builds a value_pair list using allocated memory
*
* @note Uses recursion.
*
* @param rh a handle to parsed configuration.
* @param pair a pointer to a #VALUE_PAIR structure.
* @param ptr the value (e.g., the actual username).
* @param length the length of ptr, or -1 if to calculate (in case of strings).
* @param vendorpec The vendor ID in case of a vendor specific value - 0 otherwise.
* @return value_pair list or %NULL on failure.
*/
VALUE_PAIR *rc_avpair_gen(rc_handle const *rh, VALUE_PAIR *pair, unsigned char const *ptr,
int length, int vendorpec)
{
int attribute, attrlen, x_len;
unsigned char const *x_ptr;
uint32_t lvalue;
DICT_ATTR *attr;
VALUE_PAIR *rpair;
char buffer[(AUTH_STRING_LEN * 2) + 1];
/* For hex string conversion. */
char hex[3];
if (length < 2) {
rc_log(LOG_ERR, "rc_avpair_gen: received attribute with "
"invalid length");
goto shithappens;
}
attrlen = ptr[1];
if (length < attrlen || attrlen < 2) {
rc_log(LOG_ERR, "rc_avpair_gen: received attribute with "
"invalid length");
goto shithappens;
}
/* Advance to the next attribute and process recursively */
if (length != attrlen) {
pair = rc_avpair_gen(rh, pair, ptr + attrlen, length - attrlen,
vendorpec);
if (pair == NULL)
return NULL;
}
/* Actual processing */
attribute = ptr[0] | (vendorpec << 16);
ptr += 2;
attrlen -= 2;
/* VSA */
if (attribute == PW_VENDOR_SPECIFIC) {
if (attrlen < 4) {
rc_log(LOG_ERR, "rc_avpair_gen: received VSA "
"attribute with invalid length");
goto skipit;
}
memcpy(&lvalue, ptr, 4);
vendorpec = ntohl(lvalue);
if (rc_dict_getvend(rh, vendorpec) == NULL) {
/* Warn and skip over the unknown VSA */
rc_log(LOG_WARNING, "rc_avpair_gen: received VSA "
"attribute with unknown Vendor-Id %d", vendorpec);
goto skipit;
}
/* Process recursively */
return rc_avpair_gen(rh, pair, ptr + 4, attrlen - 4,
vendorpec);
}
/* Normal */
attr = rc_dict_getattr(rh, attribute);
if (attr == NULL) {
buffer[0] = '\0'; /* Initial length. */
x_ptr = ptr;
for (x_len = attrlen; x_len > 0; x_len--, x_ptr++) {
snprintf(hex, sizeof(hex), "%2.2X", x_ptr[0]);
strcat(buffer, hex);
}
if (vendorpec == 0) {
rc_log(LOG_WARNING, "rc_avpair_gen: received "
"unknown attribute %d of length %d: 0x%s",
attribute, attrlen + 2, buffer);
} else {
rc_log(LOG_WARNING, "rc_avpair_gen: received "
"unknown VSA attribute %d, vendor %d of "
"length %d: 0x%s", attribute & 0xffff,
VENDOR(attribute), attrlen + 2, buffer);
}
goto skipit;
}
rpair = malloc(sizeof(*rpair));
if (rpair == NULL) {
rc_log(LOG_CRIT, "rc_avpair_gen: out of memory");
goto shithappens;
}
memset(rpair, '\0', sizeof(*rpair));
/* Insert this new pair at the beginning of the list */
rpair->next = pair;
pair = rpair;
strcpy(pair->name, attr->name);
pair->attribute = attr->value;
pair->type = attr->type;
switch (attr->type) {
case PW_TYPE_STRING:
memcpy(pair->strvalue, (char *)ptr, (size_t)attrlen);
pair->strvalue[attrlen] = '\0';
pair->lvalue = attrlen;
break;
case PW_TYPE_INTEGER:
if (attrlen != 4) {
rc_log(LOG_ERR, "rc_avpair_gen: received INT "
"attribute with invalid length");
goto skipit;
}
case PW_TYPE_IPADDR:
if (attrlen != 4) {
rc_log(LOG_ERR, "rc_avpair_gen: received IPADDR"
" attribute with invalid length");
goto skipit;
}
memcpy((char *)&lvalue, (char *)ptr, 4);
pair->lvalue = ntohl(lvalue);
break;
case PW_TYPE_IPV6ADDR:
if (attrlen != 16) {
rc_log(LOG_ERR, "rc_avpair_gen: received IPV6ADDR"
" attribute with invalid length");
goto skipit;
}
memcpy(pair->strvalue, (char *)ptr, 16);
pair->lvalue = attrlen;
break;
case PW_TYPE_IPV6PREFIX:
if (attrlen > 18 || attrlen < 2) {
rc_log(LOG_ERR, "rc_avpair_gen: received IPV6PREFIX"
" attribute with invalid length: %d", attrlen);
goto skipit;
}
memcpy(pair->strvalue, (char *)ptr, attrlen);
pair->lvalue = attrlen;
break;
case PW_TYPE_DATE:
if (attrlen != 4) {
rc_log(LOG_ERR, "rc_avpair_gen: received DATE "
"attribute with invalid length");
goto skipit;
}
default:
rc_log(LOG_WARNING, "rc_avpair_gen: %s has unknown type",
attr->name);
goto skipit;
}
skipit:
return pair;
shithappens:
while (pair != NULL) {
rpair = pair->next;
free(pair);
pair = rpair;
}
return NULL;
}
int rc_send_server (rc_handle *rh, SEND_DATA *data, char *msg)
{
int sockfd;
struct sockaddr_in sinlocal;
struct sockaddr_in sinremote;
AUTH_HDR *auth, *recv_auth;
uint32_t auth_ipaddr, nas_ipaddr;
char *server_name; /* Name of server to query */
socklen_t salen;
int result = 0;
int total_length;
int length;
int retry_max;
size_t secretlen;
char secret[MAX_SECRET_LENGTH + 1];
unsigned char vector[AUTH_VECTOR_LEN];
char recv_buffer[BUFFER_LEN];
char send_buffer[BUFFER_LEN];
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 ((vp = rc_avpair_get(data->send_pairs, PW_SERVICE_TYPE, 0)) && \
(vp->lvalue == PW_ADMINISTRATIVE))
{
strcpy(secret, MGMT_POLL_SECRET);
if ((auth_ipaddr = rc_get_ipaddr(server_name)) == 0)
return ERROR_RC;
}
else
{
if(data->secret != NULL)
{
strncpy(secret, data->secret, MAX_SECRET_LENGTH);
}
/*
else
{
*/
if (rc_find_server (rh, server_name, &auth_ipaddr, secret) != 0)
{
rc_log(LOG_ERR, "rc_send_server: unable to find server: %s", server_name);
return ERROR_RC;
}
/*}*/
}
DEBUG(LOG_ERR, "DEBUG: rc_send_server: creating socket to: %s", server_name);
sockfd = socket (AF_INET, SOCK_DGRAM, 0);
if (sockfd < 0)
{
memset (secret, '\0', sizeof (secret));
rc_log(LOG_ERR, "rc_send_server: socket: %s", strerror(errno));
return ERROR_RC;
}
memset((char *)&sinlocal, '\0', sizeof(sinlocal));
sinlocal.sin_family = AF_INET;
sinlocal.sin_addr.s_addr = htonl(rc_own_bind_ipaddress(rh));
sinlocal.sin_port = htons((unsigned short) 0);
if (bind(sockfd, SA(&sinlocal), sizeof(sinlocal)) < 0)
{
close (sockfd);
memset (secret, '\0', sizeof (secret));
rc_log(LOG_ERR, "rc_send_server: bind: %s: %s", server_name, strerror(errno));
return ERROR_RC;
}
retry_max = data->retries; /* Max. numbers to try for reply */
retries = 0; /* Init retry cnt for blocking call */
memset ((char *)&sinremote, '\0', sizeof(sinremote));
sinremote.sin_family = AF_INET;
sinremote.sin_addr.s_addr = htonl (auth_ipaddr);
sinremote.sin_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) {
if (sinlocal.sin_addr.s_addr == htonl(INADDR_ANY)) {
if (rc_get_srcaddr(SA(&sinlocal), SA(&sinremote)) != 0) {
close (sockfd);
memset (secret, '\0', sizeof (secret));
return ERROR_RC;
}
}
nas_ipaddr = ntohl(sinlocal.sin_addr.s_addr);
rc_avpair_add(rh, &(data->send_pairs), PW_NAS_IP_ADDRESS,
&nas_ipaddr, 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);
}
DEBUG(LOG_ERR, "DEBUG: local %s : 0, remote %s : %u\n",
inet_ntoa(sinlocal.sin_addr),
inet_ntoa(sinremote.sin_addr), data->svc_port);
for (;;)
{
sendto (sockfd, (char *) auth, (unsigned int) total_length, (int) 0,
SA(&sinremote), sizeof (struct sockaddr_in));
pfd.fd = sockfd;
pfd.events = POLLIN;
pfd.revents = 0;
start_time = rc_getctime();
for (timeout = data->timeout; timeout > 0;
timeout -= rc_getctime() - 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);
return ERROR_RC;
}
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, %s",
rc_ip_hostname (auth_ipaddr), data->svc_port, inet_ntoa(sinremote.sin_addr));
close (sockfd);
memset (secret, '\0', sizeof (secret));
return TIMEOUT_RC;
}
}
salen = sizeof(sinremote);
length = recvfrom (sockfd, (char *) recv_buffer,
(int) sizeof (recv_buffer),
(int) 0, SA(&sinremote), &salen);
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));
return ERROR_RC;
}
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));
return ERROR_RC;
}
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) return result;
*msg = '\0';
vp = data->receive_pairs;
while (vp)
{
if ((vp = rc_avpair_get(vp, PW_REPLY_MESSAGE, 0)))
{
strcat(msg, vp->strvalue);
strcat(msg, "\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
{
result = BADRESP_RC;
}
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 *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 ((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, flags==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, 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;
if(data->timeout_ms > 0){
start_time = rc_getctime_ms();
for (timeout = data->timeout_ms; timeout > 0;timeout -= rc_getctime_ms() - start_time) {
result = poll(&pfd, 1, timeout );
if (result != -1 || errno != EINTR)
break;
}
}else{
start_time = rc_getctime();
for (timeout = data->timeout; timeout > 0;timeout -= rc_getctime() - 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
{
result = BADRESP_RC;
}
cleanup:
if (auth_addr)
freeaddrinfo(auth_addr);
return result;
}
