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/* ISC license. */
#include <skalibs/nonposix.h>
#include <sys/uio.h>
#include <errno.h>
#include <string.h>
#include <sys/socket.h>
#include <skalibs/posixishard.h>
#include <skalibs/types.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/djbunix.h>
#include <skalibs/unix-timed.h>
#include <skalibs/textmessage.h>
#include <skalibs/textclient.h>
union aligner_u
{
struct cmsghdr cmsghdr ;
int i ;
} ;
static int getfd (void *p)
{
return ((int *)p)[0] ;
}
static int one (void *p)
{
(void)p ;
return 1 ;
}
static int sendit (void *p)
{
int *fd = p ;
union aligner_u ancilbuf[1 + (CMSG_SPACE(sizeof(int)) - 1) / sizeof(union aligner_u)] ;
ssize_t r ;
char ch = '|' ;
struct iovec v = { .iov_base = &ch, .iov_len = 1 } ;
struct msghdr hdr =
{
.msg_name = 0,
.msg_namelen = 0,
.msg_iov = &v,
.msg_iovlen = 1,
.msg_control = ancilbuf,
.msg_controllen = CMSG_SPACE(sizeof(int))
} ;
struct cmsghdr *c = CMSG_FIRSTHDR(&hdr) ;
memset(hdr.msg_control, 0, hdr.msg_controllen) ;
c->cmsg_level = SOL_SOCKET ;
c->cmsg_type = SCM_RIGHTS ;
c->cmsg_len = CMSG_LEN(sizeof(int)) ;
*(int *)CMSG_DATA(c) = fd[1] ;
do r = sendmsg(fd[0], &hdr, MSG_NOSIGNAL) ;
while (r < 0 && errno == EINTR) ;
if (r <= 0) return 0 ;
fd_close(fd[1]) ;
return 1 ;
}
int textclient_server_init_fromsocket (textmessage_receiver_t *in, textmessage_sender_t *syncout, textmessage_sender_t *asyncout, char const *before, size_t beforelen, char const *after, size_t afterlen, tain_t const *deadline, tain_t *stamp)
{
int fd[3] = { textmessage_sender_fd(syncout) } ;
struct iovec v ;
if (sanitize_read(textmessage_timed_receive(in, &v, deadline, stamp)) <= 0) return 0 ;
if (v.iov_len != beforelen || memcmp(v.iov_base, before, beforelen)) return (errno = EPROTO, 0) ;
if (pipenbcoe(fd+1) < 0) return 0 ;
if (!timed_flush(fd, &getfd, &one, &sendit, deadline, stamp)) goto err ;
if (!textmessage_timed_send(syncout, after, afterlen, deadline, stamp)) goto err ;
textmessage_sender_init(asyncout, fd[2]) ;
if (!textmessage_timed_send(asyncout, after, afterlen, deadline, stamp)) goto err ;
return 1 ;
err:
fd_close(fd[2]) ;
fd_close(fd[1]) ;
return 0 ;
}
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