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libc: handle socket_fs special cases

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- catch inaccessible file on bind()
- support UDP ENETDOWN and TCP EAGAIN on sendto()
This commit is contained in:
Christian Helmuth 2017-11-23 17:36:03 +01:00
parent 73a3ef4dbe
commit 2b649cb633
1 changed files with 24 additions and 15 deletions
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39
repos/libports/src/lib/libc/socket_fs_plugin.cc
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@ -499,12 +499,15 @@ extern "C" int socket_fs_bind(int libc_fd, sockaddr const *addr, socklen_t addrl
Sockaddr_string addr_string(host_string(*(sockaddr_in *)addr),
port_string(*(sockaddr_in *)addr));
int const len = strlen(addr_string.base());
int const n = write(context->bind_fd(), addr_string.base(), len);
if (n != len) return Errno(EACCES);
fsync(context->bind_fd());
return 0;
try {
int const len = strlen(addr_string.base());
int const n = write(context->bind_fd(), addr_string.base(), len);
if (n != len) return Errno(EACCES);
fsync(context->bind_fd());
return 0;
} catch (Socket_fs::Context::Inaccessible) {
return Errno(EINVAL);
}
}
@ -620,18 +623,24 @@ static ssize_t do_sendto(Libc::File_descriptor *fd,
/* TODO ENOTCONN, EISCONN, EDESTADDRREQ */
/* TODO ECONNRESET */
if (dest_addr) {
Sockaddr_string addr_string(host_string(*(sockaddr_in const *)dest_addr),
port_string(*(sockaddr_in const *)dest_addr));
int const len = strlen(addr_string.base());
int const n = write(context->remote_fd(), addr_string.base(), len);
if (n != len) return Errno(EIO);
}
try {
if (dest_addr) {
Sockaddr_string addr_string(host_string(*(sockaddr_in const *)dest_addr),
port_string(*(sockaddr_in const *)dest_addr));
int const len = strlen(addr_string.base());
int const n = write(context->remote_fd(), addr_string.base(), len);
if (n != len) return Errno(EIO);
}
lseek(context->data_fd(), 0, 0);
ssize_t out_len = write(context->data_fd(), buf, len);
if (out_len == 0) {
switch (context->proto()) {
case Socket_fs::Context::Proto::UDP: return Errno(ENETDOWN);
case Socket_fs::Context::Proto::TCP: return Errno(EAGAIN);
}
}
return out_len;
} catch (Socket_fs::Context::Inaccessible) {
return Errno(EINVAL);