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-rw-r--r--src/ipcpd/ipcp-data.c29
-rw-r--r--src/ipcpd/ipcp-data.h9
-rw-r--r--src/ipcpd/ipcp.c4
-rw-r--r--src/ipcpd/shim-udp/main.c294
4 files changed, 319 insertions, 17 deletions
diff --git a/src/ipcpd/ipcp-data.c b/src/ipcpd/ipcp-data.c
index 2ed20943..1828fda9 100644
--- a/src/ipcpd/ipcp-data.c
+++ b/src/ipcpd/ipcp-data.c
@@ -436,8 +436,8 @@ uint64_t ipcp_data_get_addr(struct ipcp_data * data,
return addr;
}
-static flow_t * find_flow(struct ipcp_data * data,
- uint32_t port_id)
+flow_t * ipcp_data_find_flow(struct ipcp_data * data,
+ uint32_t port_id)
{
struct list_head * h;
list_for_each(h, &data->flows) {
@@ -452,7 +452,7 @@ static flow_t * find_flow(struct ipcp_data * data,
bool ipcp_data_has_flow(struct ipcp_data * data,
uint32_t port_id)
{
- return find_flow(data, port_id) != NULL;
+ return ipcp_data_find_flow(data, port_id) != NULL;
}
int ipcp_data_add_flow(struct ipcp_data * data,
@@ -474,3 +474,26 @@ int ipcp_data_add_flow(struct ipcp_data * data,
return 0;
}
+
+int ipcp_data_del_flow(struct ipcp_data * data,
+ uint32_t port_id)
+{
+ flow_t * f;
+
+ if (data == NULL)
+ return -1;
+
+ pthread_mutex_lock(&data->flow_lock);
+
+ f = ipcp_data_find_flow(data, port_id);
+ if (f == NULL)
+ return -1;
+
+ list_del(&f->list);
+
+ free(f);
+
+ pthread_mutex_unlock(&data->flow_lock);
+
+ return 0;
+}
diff --git a/src/ipcpd/ipcp-data.h b/src/ipcpd/ipcp-data.h
index a8db44f7..3f036ef5 100644
--- a/src/ipcpd/ipcp-data.h
+++ b/src/ipcpd/ipcp-data.h
@@ -80,12 +80,11 @@ uint64_t ipcp_data_get_addr(struct ipcp_data * data,
const char * ap_name);
bool ipcp_data_has_flow(struct ipcp_data * data,
uint32_t port_id);
-bool ipcp_data_has_flow_s(struct ipcp_data * data,
- uint32_t port_id,
- enum flow_state state);
+flow_t * ipcp_data_find_flow(struct ipcp_data * data,
+ uint32_t port_id);
int ipcp_data_add_flow(struct ipcp_data * data,
flow_t * flow);
-int ipcp_data_remove_flow(struct ipcp_data * data,
- uint32_t port_id);
+int ipcp_data_del_flow(struct ipcp_data * data,
+ uint32_t port_id);
#endif /* IPCPD_IPCP_DATA_H */
diff --git a/src/ipcpd/ipcp.c b/src/ipcpd/ipcp.c
index 0b652ff6..e0dac20b 100644
--- a/src/ipcpd/ipcp.c
+++ b/src/ipcpd/ipcp.c
@@ -174,8 +174,8 @@ int ipcp_main_loop(struct ipcp * _ipcp)
LOG_ERR("Flow_alloc unsupported.");
break;
}
- ret_msg.has_result = true;
- ret_msg.result = _ipcp->ops->ipcp_flow_alloc(
+ ret_msg.has_fd = true;
+ ret_msg.fd = _ipcp->ops->ipcp_flow_alloc(
msg->port_id,
msg->dst_ap_name,
msg->ap_name,
diff --git a/src/ipcpd/shim-udp/main.c b/src/ipcpd/shim-udp/main.c
index df731490..66513b02 100644
--- a/src/ipcpd/shim-udp/main.c
+++ b/src/ipcpd/shim-udp/main.c
@@ -43,10 +43,23 @@
#include <stdlib.h>
#include <pthread.h>
+#include "irmd_messages.pb-c.h"
+
+typedef IrmMsg irm_msg_t;
+
+#include "ipcpd_messages.pb-c.h"
+
+typedef IpcpMsg ipcp_msg_t;
+
#define THIS_TYPE IPCP_SHIM_UDP
+#define LISTEN_PORT htons(0x0D1F)
+#define SHIM_UDP_BUF_SIZE 256
#define shim_data(type) ((struct ipcp_udp_data *) type->data)
+#define local_ip (((struct ipcp_udp_data *) \
+ _ipcp->data)->s_saddr.sin_addr.s_addr)
+
/* global for trapping signal */
int irmd_pid;
@@ -64,16 +77,16 @@ struct ipcp_udp_data {
uint32_t ip_addr;
uint32_t dns_addr;
+ /* listen server */
+ struct sockaddr_in s_saddr;
+ int s_fd;
+
pthread_mutex_t lock;
};
struct udp_flow {
/* FLOW MUST BE FIRST !!!! */
flow_t flow;
-
- uint16_t localport;
-
- struct sockaddr_in * remote;
int fd;
};
@@ -131,10 +144,117 @@ struct ipcp_udp_data * ipcp_udp_data_create(char * ap_name,
return udp_data;
}
+void * ipcp_udp_listener()
+{
+ char buf[SHIM_UDP_BUF_SIZE];
+ int n = 0;
+
+ struct sockaddr_in f_saddr;
+ struct sockaddr_in c_saddr;
+ struct hostent * hostp;
+ struct udp_flow * flow;
+ int sfd = shim_data(_ipcp)->s_fd;
+
+ irm_msg_t msg = IRM_MSG__INIT;
+ irm_msg_t * ret_msg ;
+
+ while (true) {
+ flow = malloc(sizeof *flow);
+ if (flow == NULL)
+ continue;
+ n = sizeof c_saddr;
+ n = recvfrom(sfd, buf, SHIM_UDP_BUF_SIZE, 0,
+ (struct sockaddr *) &c_saddr, (unsigned *) &n);
+ if (n < 0)
+ continue;
+
+ /* flow alloc request from other host */
+ hostp = gethostbyaddr((const char *)&c_saddr.sin_addr.s_addr,
+ sizeof(c_saddr.sin_addr.s_addr), AF_INET);
+ if (hostp == NULL)
+ continue;
+
+ /* create a new socket for the server */
+
+ flow->fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ if (flow->fd == -1) {
+ free(flow);
+ continue;
+ }
+
+ memset((char *)&f_saddr, 0, sizeof f_saddr);
+ f_saddr.sin_family = AF_INET;
+ f_saddr.sin_addr.s_addr = local_ip;
+
+ /*
+ * FIXME: we could have a port dedicated per registered AP
+ * Not that critical for UDP, but will be for LLC
+ */
+
+ f_saddr.sin_port = 0;
+
+ /* at least try to get the packet on the wire */
+ while (sendto(flow->fd, buf, n, 0,
+ (struct sockaddr *) &c_saddr, sizeof c_saddr) < 0)
+ ;
+
+ /*
+ * store the remote address in the file descriptor
+ * this avoids having to store the sockaddr_in in
+ * the flow structure
+ */
+
+ if (connect(flow->fd,
+ (struct sockaddr *)&c_saddr, sizeof c_saddr) < 0) {
+ close(flow->fd);
+ free(flow);
+ continue;
+ }
+
+
+ /* GERONIMOO */
+
+ msg.code = IRM_MSG_CODE__IPCP_FLOW_REQ_ARR;
+ msg.ap_name = "John Day";
+ msg.ae_name = ""; /* no AE */
+ msg.has_reg_ap_id = true;
+ msg.reg_ap_id = ipcp_data_get_reg_ap_id(_ipcp->data, buf);
+
+ ret_msg = send_recv_irm_msg(&msg);
+ if (ret_msg == NULL) {
+ LOG_ERR("Could not send message to IRM.");
+ close(flow->fd);
+ free(flow);
+ continue;
+ }
+
+ if (!ret_msg->has_port_id) {
+ LOG_ERR("Didn't get port_id.");
+ free(ret_msg);
+ close(flow->fd);
+ free(flow);
+ continue;
+ }
+
+ flow->flow.port_id = ret_msg->port_id;
+ flow->flow.oflags = FLOW_O_DEFAULT;
+ flow->flow.state = FLOW_PENDING;
+
+ if(ipcp_data_add_flow(_ipcp->data, (flow_t *) flow)) {
+ LOG_DBGF("Could not add flow.");
+ free(ret_msg);
+ close(flow->fd);
+ free(flow);
+ continue;
+ }
+ }
+}
+
int ipcp_udp_bootstrap(struct dif_config * conf)
{
char ipstr[INET_ADDRSTRLEN];
char dnsstr[INET_ADDRSTRLEN];
+ pthread_t handler;
if (conf->type != THIS_TYPE) {
LOG_ERR("Config doesn't match IPCP type.");
@@ -162,6 +282,27 @@ int ipcp_udp_bootstrap(struct dif_config * conf)
shim_data(_ipcp)->ip_addr = conf->ip_addr;
shim_data(_ipcp)->dns_addr = conf->dns_addr;
+ /* UDP listen server */
+
+ if ((shim_data(_ipcp)->s_fd =
+ socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) {
+ LOG_DBGF("Can't create socket.");
+ return -1;
+ }
+
+ shim_data(_ipcp)->s_saddr.sin_family = AF_INET;
+ shim_data(_ipcp)->s_saddr.sin_addr.s_addr = conf->ip_addr;
+ shim_data(_ipcp)->s_saddr.sin_port = LISTEN_PORT;
+
+ if (bind(shim_data(_ipcp)->s_fd,
+ (struct sockaddr *)&shim_data(_ipcp)->s_saddr,
+ sizeof shim_data(_ipcp)->s_saddr ) < 0) {
+ LOG_ERR("Couldn't bind to %s.", ipstr);
+ return -1;
+ }
+
+ pthread_create(&handler, NULL, ipcp_udp_listener, NULL);
+
_ipcp->state = IPCP_ENROLLED;
LOG_DBG("Bootstrapped shim IPCP over UDP %s-%d.",
@@ -196,7 +337,6 @@ int ipcp_udp_ap_unreg(uint32_t reg_ap_id)
{
char * name = strdup(ipcp_data_get_reg_ap_name(_ipcp->data,
reg_ap_id));
- LOG_DBG("Unregistering %s.", name);
ipcp_data_del_reg_entry(_ipcp->data, reg_ap_id);
@@ -214,11 +354,151 @@ int ipcp_udp_flow_alloc(uint32_t port_id,
char * src_ae_name,
struct qos_spec * qos)
{
- return 0;
+ char buf[SHIM_UDP_BUF_SIZE];
+ struct udp_flow * flow = NULL;
+ struct sockaddr_in l_saddr;
+ struct sockaddr_in r_saddr;
+ int n;
+
+ irm_msg_t msg = IRM_MSG__INIT;
+ irm_msg_t * ret_msg = NULL;
+
+ if (dst_ap_name == NULL || src_ap_name == NULL || src_ae_name == NULL)
+ return -1;
+
+ LOG_DBG("Received flow allocation request from %s to %s.",
+ src_ap_name, dst_ap_name);
+
+ if (strlen(dst_ap_name) > 255
+ || strlen(src_ap_name) > 255
+ || strlen(src_ae_name) > 255) {
+ LOG_ERR("Name too long for this shim.");
+ return -1;
+ }
+
+ if (qos != NULL)
+ LOG_DBGF("QoS requested. UDP/IP can't do that.");
+
+ flow = malloc (sizeof *flow);
+ if (flow == NULL)
+ return -1;
+
+ flow->fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ if (flow->fd == -1) {
+ free(flow);
+ return -1;
+ }
+
+ /* this socket is for the flow */
+ memset((char *)&l_saddr, 0, sizeof l_saddr);
+ l_saddr.sin_family = AF_INET;
+ l_saddr.sin_addr.s_addr = local_ip;
+ l_saddr.sin_port = 0;
+
+ if (bind(flow->fd, (struct sockaddr *) &l_saddr, sizeof l_saddr) < 0) {
+ char ipstr[INET_ADDRSTRLEN];
+ inet_ntop(AF_INET,
+ &l_saddr.sin_addr.s_addr,
+ ipstr,
+ INET_ADDRSTRLEN);
+ close(flow->fd);
+ free(flow);
+ return -1;
+ }
+
+ /* get the remote IPv4 address using dns */
+ /* FIXME: use calls to specify DDNS server */
+
+#define IP_ADDR 0x7f000001; /* localhost */
+
+ LOG_MISSING;
+
+ memset((char *)&r_saddr, 0, sizeof r_saddr);
+ r_saddr.sin_family = AF_INET;
+ /* FIXME: pull in correct IP address */
+ r_saddr.sin_addr.s_addr = IP_ADDR; /* FIXME */
+ r_saddr.sin_port = LISTEN_PORT;
+
+ /* at least try to get the packet on the wire */
+ while (sendto(flow->fd, dst_ap_name, n, 0,
+ (struct sockaddr *) &r_saddr, sizeof r_saddr) < 0)
+
+ /* wait for the echo from the server */
+ /* FIXME: do this in a different thread not to block the entire shim */
+ n = sizeof r_saddr;
+ n = recvfrom(flow->fd, buf, SHIM_UDP_BUF_SIZE, 0,
+ (struct sockaddr *) &r_saddr, (unsigned *) &n);
+
+ flow->flow.port_id = port_id;
+ flow->flow.oflags = FLOW_O_DEFAULT;
+ flow->flow.state = FLOW_ALLOCATED;
+
+ /*
+ * store the remote address in the file descriptor
+ * this avoids having to store the sockaddr_in in
+ * the flow structure
+ */
+
+ if (connect(flow->fd,
+ (struct sockaddr *)&r_saddr, sizeof r_saddr) < 0) {
+ close(flow->fd);
+ free(flow);
+ return -1;
+ }
+
+ /* add flow to the list */
+
+ pthread_mutex_lock(&_ipcp->data->flow_lock);
+
+ if(ipcp_data_add_flow(_ipcp->data, (flow_t *)flow)) {
+ LOG_DBGF("Could not add flow.");
+ pthread_mutex_unlock(&_ipcp->data->flow_lock);
+ close(flow->fd);
+ free(flow);
+ return -1;
+ }
+
+ pthread_mutex_unlock(&_ipcp->data->flow_lock);
+
+ /* tell IRMd that flow allocation worked */
+ /* well,there is no flow allocation */
+
+ msg.code = IRM_MSG_CODE__IPCP_FLOW_ALLOC_REPLY;
+ msg.has_port_id = true;
+ msg.port_id = flow->flow.port_id;
+ msg.has_response = true;
+ msg.response = 0;
+
+ ret_msg = send_recv_irm_msg(&msg);
+ if (ret_msg == NULL) {
+ close (flow->fd);
+ ipcp_data_del_flow(_ipcp->data, flow->flow.port_id);
+ return -1;
+ }
+
+ return flow->fd;
}
int ipcp_udp_flow_alloc_resp(uint32_t port_id,
- int result)
+ int response)
{
+ struct udp_flow * flow = (struct udp_flow *) ipcp_data_find_flow(
+ _ipcp->data, port_id);
+ if (flow == NULL) {
+ return -1;
+ }
+
+ if (response) {
+ ipcp_data_del_flow(_ipcp->data, port_id);
+ return 0;
+ }
+
+ /* awaken pending flow */
+
+ if (flow->flow.state != FLOW_PENDING)
+ return -1;
+
+ flow->flow.state = FLOW_ALLOCATED;
+
return 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 12:18:07 +0000