From 3cbb9793bf5645f400545aeef904a48fe5dca64c Mon Sep 17 00:00:00 2001
From: Uros Majstorovic <majstor@majstor.org>
Date: Sat, 19 Oct 2019 19:40:32 +0200
Subject: network sockets added

---
 code/fe310/eos/sock.c | 102 ++++++++++++++++++++++++++++++++++++++++++++++++++
 code/fe310/eos/sock.h |  24 ++++++++++++
 2 files changed, 126 insertions(+)
 create mode 100644 code/fe310/eos/sock.c
 create mode 100644 code/fe310/eos/sock.h

(limited to 'code')

diff --git a/code/fe310/eos/sock.c b/code/fe310/eos/sock.c
new file mode 100644
index 0000000..b217b43
--- /dev/null
+++ b/code/fe310/eos/sock.c
@@ -0,0 +1,102 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "eos.h"
+#include "event.h"
+#include "net.h"
+
+#include "sock.h"
+
+static eos_sock_fptr_t sock_handler[EOS_SOCK_MAX_SOCK];
+static uint16_t sock_handler_flags_buf_free = 0;
+static uint16_t sock_handler_flags_buf_acq = 0;
+
+static void sock_handler_evt(unsigned char type, unsigned char *buffer, uint16_t len) {
+    if (buffer[0] == EOS_SOCK_MTYPE_PKT) {
+        uint8_t sock = buffer[1];
+        if (sock && (sock <= EOS_SOCK_MAX_SOCK)) {
+            sock--;
+        } else {
+            eos_evtq_bad_handler(type, buffer, len);
+            eos_net_free(buffer, 0);
+            return;
+        }
+        uint16_t buf_free = ((uint16_t)1 << sock) & sock_handler_flags_buf_free;
+        uint16_t buf_acq = ((uint16_t)1 << sock) & sock_handler_flags_buf_acq;
+        if (buf_free) {
+            eos_net_free(buffer, buf_acq);
+            buffer = NULL;
+            len = 0;
+        }
+
+        sock_handler[sock](buffer, len);
+
+        if (buf_free && buf_acq) eos_net_release();
+    }
+}
+
+void eos_sock_init(void) {
+    eos_net_set_handler(EOS_NET_MTYPE_SOCK, sock_handler_evt, 0);
+}
+
+int eos_sock_open_udp(void) {
+    unsigned char type = EOS_SOCK_MTYPE_OPEN_DGRAM;
+    unsigned char *buffer = eos_net_alloc();
+    uint16_t buf_size;
+    int rv, sock;
+
+    buffer[0] = type;
+    rv = eos_net_send(EOS_NET_MTYPE_SOCK, buffer, 1, 0);
+    if (rv) return rv;
+
+    eos_evtq_get(EOS_NET_MTYPE_SOCK, &type, 1, &buffer, &buf_size);
+    if (buf_size < 2) {
+        eos_net_free(buffer, 0);
+        return EOS_ERR_NET;
+    }
+
+    sock = buffer[1];
+    eos_net_free(buffer, 1);
+
+    return sock;
+}
+
+void eos_sock_close(int sock) {
+    unsigned char *buffer = eos_net_alloc();
+    buffer[0] = EOS_SOCK_MTYPE_CLOSE;
+    buffer[1] = sock;
+    eos_net_send(EOS_NET_MTYPE_SOCK, buffer, 2, 1);
+}
+
+int eos_sock_sendto(int sock, unsigned char *buffer, uint16_t size, unsigned char more, EOSNetAddr *addr) {
+    unsigned char type = EOS_NET_MTYPE_SOCK;
+
+    buffer[0] = EOS_SOCK_MTYPE_PKT;
+    buffer[1] = sock;
+    memcpy(buffer+2, addr->host, sizeof(addr->host));
+    memcpy(buffer+2+sizeof(addr->host), &addr->port, sizeof(addr->port));
+    return eos_net_send(type, buffer, size, more);
+}
+
+void eos_sock_getfrom(unsigned char *buffer, EOSNetAddr *addr) {
+    memcpy(addr->host, buffer+2, sizeof(addr->host));
+    memcpy(&addr->port, buffer+2+sizeof(addr->host), sizeof(addr->port));
+}
+
+
+void eos_sock_set_handler(int sock, eos_sock_fptr_t handler, uint8_t flags) {
+    if (sock && (sock <= EOS_SOCK_MAX_SOCK)) {
+        sock--;
+    } else {
+        return;
+    }
+    if (flags) {
+        uint16_t flag = (uint16_t)1 << sock;
+        if (flags & EOS_NET_FLAG_BUF_FREE) sock_handler_flags_buf_free |= flag;
+        if (flags & EOS_NET_FLAG_BUF_ACQ) sock_handler_flags_buf_acq |= flag;
+    }
+    sock_handler[sock] = handler;
+}
+
+
diff --git a/code/fe310/eos/sock.h b/code/fe310/eos/sock.h
new file mode 100644
index 0000000..8e9717d
--- /dev/null
+++ b/code/fe310/eos/sock.h
@@ -0,0 +1,24 @@
+#include <stdint.h>
+
+#define EOS_SOCK_MTYPE_PKT          0
+#define EOS_SOCK_MTYPE_OPEN_DGRAM   1
+#define EOS_SOCK_MTYPE_CLOSE        127
+
+#define EOS_SOCK_MAX_SOCK           2
+
+#define EOS_SOCK_SIZE_UDP_HDR       8
+
+#define EOS_IPv4_ADDR_SIZE          4
+
+typedef struct EOSNetAddr {
+    unsigned char host[EOS_IPv4_ADDR_SIZE];
+    uint16_t port;
+} EOSNetAddr;
+
+typedef void (*eos_sock_fptr_t) (unsigned char *, uint16_t);
+
+int eos_sock_open_udp(void);
+void eos_sock_close(int sock);
+int eos_sock_sendto(int sock, unsigned char *buffer, uint16_t size, unsigned char more, EOSNetAddr *addr);
+void eos_sock_getfrom(unsigned char *buffer, EOSNetAddr *addr);
+void eos_sock_set_handler(int sock, eos_sock_fptr_t handler, uint8_t flags);
-- 
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