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/* SPDX-License-Identifier: ISC */
#include "init.h"
static int send_retry(int fd, const void *dst, size_t addrlen,
const void *buffer, size_t size)
{
ssize_t ret;
retry:
ret = sendto(fd, buffer, size, MSG_NOSIGNAL, dst, addrlen);
if (ret < 0 && errno == EINTR)
goto retry;
if (ret < 0 || (size_t)ret < size)
return -1;
return 0;
}
static int send_string(int fd, const void *dst, size_t addrlen,
const char *str)
{
size_t len = strlen(str);
uint8_t raw_len[2];
raw_len[0] = (len >> 8) & 0xFF;
raw_len[1] = len & 0xFF;
if (send_retry(fd, dst, addrlen, raw_len, 2))
return -1;
return len > 0 ? send_retry(fd, dst, addrlen, str, len) : 0;
}
int init_socket_create(void)
{
struct sockaddr_un un;
int fd;
fd = socket(AF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC, 0);
if (fd < 0) {
perror("socket");
return -1;
}
memset(&un, 0, sizeof(un));
un.sun_family = AF_UNIX;
strcpy(un.sun_path, INIT_SOCK_PATH);
unlink(INIT_SOCK_PATH);
if (bind(fd, (struct sockaddr *)&un, sizeof(un))) {
perror("bind: " INIT_SOCK_PATH);
close(fd);
unlink(INIT_SOCK_PATH);
return -1;
}
return fd;
}
int init_socket_send_status(int fd, const void *dest_addr, size_t addrlen,
E_SERVICE_STATE state, service_t *svc)
{
uint8_t info[8];
if (svc == NULL || state == ESS_NONE) {
info[0] = ESS_NONE;
info[1] = 0;
info[2] = info[3] = 0;
info[4] = info[5] = info[6] = info[7] = 0xFF;
} else {
info[0] = state;
info[1] = svc->status & 0xFF;
info[2] = info[3] = 0;
info[4] = (svc->id >> 24) & 0xFF;
info[5] = (svc->id >> 16) & 0xFF;
info[6] = (svc->id >> 8) & 0xFF;
info[7] = svc->id & 0xFF;
}
if (send_retry(fd, dest_addr, addrlen, info, sizeof(info)))
return -1;
if (svc != NULL && state != ESS_NONE) {
if (send_string(fd, dest_addr, addrlen, svc->fname))
return -1;
if (send_string(fd, dest_addr, addrlen, svc->name))
return -1;
}
return 0;
}
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