Added minimal send implementation

Renamed minirecv.c to recv.c
Added build commands to build.sh
Added the use of common code

1 files changed, 57 insertions, 0 deletions

diff --git a/recv.c b/recv.c
new file mode 100644
index 0000000..e4433ae
--- /dev/null
+++ b/recv.c
@@ -0,0 +1,57 @@
+// Minimal server implementation for probing out things
+
+#include "common.h"
+#include <arpa/inet.h>
+#include <errno.h>
+#include <poll.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+int main(void)
+{
+    u32 serverfd, clientfd;
+    u8 on = 1;
+
+    const struct sockaddr_in address = {
+        AF_INET,
+        htons(PORT),
+        {0},
+    };
+
+    serverfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+    setsockopt(serverfd, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on));
+    if (bind(serverfd, (struct sockaddr *)&address, sizeof(address)))
+        return 1;
+
+    listen(serverfd, 256);
+
+    clientfd = accept(serverfd, 0, 0);
+
+    struct pollfd fds[1] = {
+        {clientfd, POLLIN, 0},
+    };
+
+    for (;;) {
+        int ret = poll(fds, 1, 50000);
+        if (ret == -1)
+            return 2;
+
+        if (fds[0].revents & POLLIN) {
+            u8 recv_buf[BUF_MAX];
+            u32 nrecv = recv(clientfd, recv_buf, sizeof(recv_buf), 0);
+
+            writef("client(%d): %d bytes received.\n", clientfd, nrecv);
+            if (nrecv == -1) {
+                return errno;
+            } else if (nrecv == 0) {
+                writef("client(%d): disconnected.\n", clientfd);
+                fds[0].fd      = -1;
+                fds[0].revents = 0;
+                close(clientfd);
+                return 0;
+            }
+        }
+    }
+
+    return 0;
+}