2 * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <sys/queue.h>
18 #include <sys/types.h>
30 #include "got_error.h"
32 #include "got_lib_poll.h"
36 const struct got_error *
37 gotd_imsg_recv_error(uint32_t *client_id, struct imsg *imsg)
39 struct gotd_imsg_error ierr;
42 datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
43 if (datalen != sizeof(ierr))
44 return got_error(GOT_ERR_PRIVSEP_LEN);
45 memcpy(&ierr, imsg->data, sizeof(ierr));
48 *client_id = ierr.client_id;
50 if (ierr.code == GOT_ERR_ERRNO)
51 errno = ierr.errno_code;
53 return got_error_msg(ierr.code, ierr.msg);
56 const struct got_error *
57 gotd_imsg_flush(struct imsgbuf *ibuf)
59 const struct got_error *err = NULL;
61 while (ibuf->w.queued > 0) {
62 err = got_poll_fd(ibuf->fd, POLLOUT, INFTIM);
66 if (imsg_flush(ibuf) == -1) {
67 if (errno != EAGAIN) {
69 err = got_error_from_errno("imsg_flush");
78 const struct got_error *
79 gotd_imsg_recv(struct imsg *imsg, struct imsgbuf *ibuf, size_t min_datalen)
83 n = imsg_get(ibuf, imsg);
85 return got_error_from_errno("imsg_get");
91 return got_error(GOT_ERR_PRIVSEP_READ);
92 return got_error_from_errno("imsg_read");
95 return got_error(GOT_ERR_EOF);
96 n = imsg_get(ibuf, imsg);
98 return got_error_from_errno("imsg_get");
101 if (imsg->hdr.len < IMSG_HEADER_SIZE + min_datalen)
102 return got_error(GOT_ERR_PRIVSEP_LEN);
107 const struct got_error *
108 gotd_imsg_poll_recv(struct imsg *imsg, struct imsgbuf *ibuf, size_t min_datalen)
110 const struct got_error *err = NULL;
113 err = gotd_imsg_recv(imsg, ibuf, min_datalen);
114 if (err == NULL || err->code != GOT_ERR_PRIVSEP_READ)
117 err = got_poll_fd(ibuf->fd, POLLIN, INFTIM);
126 gotd_imsg_send_error(struct imsgbuf *ibuf, uint32_t peerid,
127 uint32_t client_id, const struct got_error *err)
129 const struct got_error *flush_err;
130 struct gotd_imsg_error ierr;
133 ierr.code = err->code;
134 if (err->code == GOT_ERR_ERRNO)
135 ierr.errno_code = errno;
138 ierr.client_id = client_id;
139 strlcpy(ierr.msg, err->msg, sizeof(ierr.msg));
141 ret = imsg_compose(ibuf, GOTD_IMSG_ERROR, peerid, getpid(), -1,
142 &ierr, sizeof(ierr));
146 flush_err = gotd_imsg_flush(ibuf);
154 gotd_imsg_send_error_event(struct gotd_imsgev *iev, uint32_t peerid,
155 uint32_t client_id, const struct got_error *err)
157 struct gotd_imsg_error ierr;
160 ierr.code = err->code;
161 if (err->code == GOT_ERR_ERRNO)
162 ierr.errno_code = errno;
165 ierr.client_id = client_id;
166 strlcpy(ierr.msg, err->msg, sizeof(ierr.msg));
168 ret = gotd_imsg_compose_event(iev, GOTD_IMSG_ERROR, peerid, -1,
169 &ierr, sizeof(ierr));
177 gotd_imsg_event_add(struct gotd_imsgev *iev)
179 iev->events = EV_READ;
180 if (iev->ibuf.w.queued)
181 iev->events |= EV_WRITE;
184 event_set(&iev->ev, iev->ibuf.fd, iev->events, iev->handler, iev);
185 event_add(&iev->ev, NULL);
189 gotd_imsg_compose_event(struct gotd_imsgev *iev, uint16_t type, uint32_t peerid,
190 int fd, void *data, uint16_t datalen)
194 ret = imsg_compose(&iev->ibuf, type, peerid, getpid(), fd,
197 gotd_imsg_event_add(iev);
203 gotd_imsg_forward(struct gotd_imsgev *iev, struct imsg *imsg, int fd)
205 return gotd_imsg_compose_event(iev, imsg->hdr.type, imsg->hdr.peerid,
206 fd, imsg->data, imsg->hdr.len - IMSG_HEADER_SIZE);