From a288258785bac3c2000227532f4a17210813c506 Mon Sep 17 00:00:00 2001
From: Anton Kling <anton@kling.gg>
Date: Thu, 16 Nov 2023 15:24:45 +0100
Subject: Kernel: Change how syscalls are built and implemented.

---
 kernel/scalls/recvfrom.c | 59 ------------------------------------------------
 1 file changed, 59 deletions(-)
 delete mode 100644 kernel/scalls/recvfrom.c

(limited to 'kernel/scalls/recvfrom.c')

diff --git a/kernel/scalls/recvfrom.c b/kernel/scalls/recvfrom.c
deleted file mode 100644
index af4e809..0000000
--- a/kernel/scalls/recvfrom.c
+++ /dev/null
@@ -1,59 +0,0 @@
-#include <assert.h>
-#include <fs/vfs.h>
-#include <math.h>
-#include <poll.h>
-#include <scalls/recvfrom.h>
-
-size_t syscall_recvfrom(
-    int socket, void *buffer, size_t length, int flags,
-    struct two_args
-        *extra_args /*struct sockaddr *address, socklen_t *address_len*/) {
-
-  struct sockaddr *address = (struct sockaddr *)extra_args->a;
-  socklen_t *address_len = (socklen_t *)extra_args->b;
-  kprintf("address: %x\n", address);
-  kprintf("address_len: %x\n", address_len);
-
-  if (flags & MSG_WAITALL) {
-    struct pollfd fds[1];
-    fds[0].fd = socket;
-    fds[0].events = POLLIN;
-    poll(fds, 1, 0);
-  }
-
-  u16 data_length;
-  socklen_t tmp_socklen;
-  vfs_pread(socket, &tmp_socklen, sizeof(socklen_t), 0);
-  if (address_len)
-    *address_len = tmp_socklen;
-  if (address) {
-    vfs_pread(socket, address, tmp_socklen, 0);
-  } else {
-    // We still have to throwaway the data.
-    char devnull[100];
-    for (; tmp_socklen;) {
-      int rc = vfs_pread(socket, devnull, min(tmp_socklen, 100), 0);
-      assert(rc >= 0);
-      tmp_socklen -= rc;
-    }
-  }
-
-  vfs_pread(socket, &data_length, sizeof(data_length), 0);
-  // If it is reading less than the packet length that could cause
-  // problems as the next read will not be put at a new header. Luckily
-  // it seems as if other UNIX systems can discard the rest of the
-  // packet if not read.
-
-  // Read in the data requested
-  int read_len = min(length, data_length);
-  int rc = vfs_pread(socket, buffer, read_len, 0);
-  // Discard the rest of the packet
-  int rest = data_length - read_len;
-  char devnull[100];
-  for (; rest;) {
-    int rc = vfs_pread(socket, devnull, 100, 0);
-    assert(rc >= 0);
-    rest -= rc;
-  }
-  return rc;
-}
-- 
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