combine avahi-core and avahi-common components into one library

[catta] / avahi-core / netlink.c

diff --git a/avahi-core/netlink.c b/avahi-core/netlink.c
deleted file mode 100644 (file)
index acea696..0000000
--- a/avahi-core/netlink.c
+++ /dev/null
@@ -1,208 +0,0 @@
-/***
-  This file is part of avahi.
-
-  avahi is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as
-  published by the Free Software Foundation; either version 2.1 of the
-  License, or (at your option) any later version.
-
-  avahi is distributed in the hope that it will be useful, but WITHOUT
-  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
-  Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public
-  License along with avahi; if not, write to the Free Software
-  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
-  USA.
-***/
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <assert.h>
-
-#include <avahi-common/malloc.h>
-#include "netlink.h"
-#include "log.h"
-
-struct AvahiNetlink {
-    int fd;
-    unsigned seq;
-    AvahiNetlinkCallback callback;
-    void* userdata;
-    uint8_t* buffer;
-    size_t buffer_length;
-
-    const AvahiPoll *poll_api;
-    AvahiWatch *watch;
-};
-
-int avahi_netlink_work(AvahiNetlink *nl, int block) {
-    ssize_t bytes;
-    struct msghdr smsg;
-    struct cmsghdr *cmsg;
-    struct ucred *cred;
-    struct iovec iov;
-    struct nlmsghdr *p;
-    char cred_msg[CMSG_SPACE(sizeof(struct ucred))];
-
-    assert(nl);
-
-    iov.iov_base = nl->buffer;
-    iov.iov_len = nl->buffer_length;
-
-    smsg.msg_name = NULL;
-    smsg.msg_namelen = 0;
-    smsg.msg_iov = &iov;
-    smsg.msg_iovlen = 1;
-    smsg.msg_control = cred_msg;
-    smsg.msg_controllen = sizeof(cred_msg);
-    smsg.msg_flags = (block ? 0 : MSG_DONTWAIT);
-
-    if ((bytes = recvmsg(nl->fd, &smsg, 0)) < 0) {
-        if (errno == EAGAIN || errno == EINTR)
-            return 0;
-
-        avahi_log_error(__FILE__": recvmsg() failed: %s", strerror(errno));
-        return -1;
-    }
-
-    cmsg = CMSG_FIRSTHDR(&smsg);
-
-    if (!cmsg || cmsg->cmsg_type != SCM_CREDENTIALS) {
-        avahi_log_warn("No sender credentials received, ignoring data.");
-        return -1;
-    }
-
-    cred = (struct ucred*) CMSG_DATA(cmsg);
-
-    if (cred->uid != 0)
-        return -1;
-
-    p = (struct nlmsghdr *) nl->buffer;
-
-    assert(nl->callback);
-
-    for (; bytes > 0; p = NLMSG_NEXT(p, bytes)) {
-        if (!NLMSG_OK(p, (size_t) bytes)) {
-            avahi_log_warn(__FILE__": packet truncated");
-            return -1;
-        }
-
-        nl->callback(nl, p, nl->userdata);
-    }
-
-    return 0;
-}
-
-static void socket_event(AvahiWatch *w, int fd, AVAHI_GCC_UNUSED AvahiWatchEvent event, void *userdata) {
-    AvahiNetlink *nl = userdata;
-
-    assert(w);
-    assert(nl);
-    assert(fd == nl->fd);
-
-    avahi_netlink_work(nl, 0);
-}
-
-AvahiNetlink *avahi_netlink_new(const AvahiPoll *poll_api, uint32_t groups, void (*cb) (AvahiNetlink *nl, struct nlmsghdr *n, void* userdata), void* userdata) {
-    int fd = -1;
-    const int on = 1;
-    struct sockaddr_nl addr;
-    AvahiNetlink *nl = NULL;
-
-    assert(poll_api);
-    assert(cb);
-
-    if ((fd = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE)) < 0) {
-        avahi_log_error(__FILE__": socket(PF_NETLINK): %s", strerror(errno));
-        return NULL;
-    }
-
-    memset(&addr, 0, sizeof(addr));
-    addr.nl_family = AF_NETLINK;
-    addr.nl_groups = groups;
-    addr.nl_pid = 0; // use 0 instead of getpid() to allow multiple instances of avahi in one process
-
-    if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
-        avahi_log_error(__FILE__": bind(): %s", strerror(errno));
-        goto fail;
-    }
-
-    if (setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on)) < 0) {
-        avahi_log_error(__FILE__": SO_PASSCRED: %s", strerror(errno));
-        goto fail;
-    }
-
-    if (!(nl = avahi_new(AvahiNetlink, 1))) {
-        avahi_log_error(__FILE__": avahi_new() failed.");
-        goto fail;
-    }
-
-    nl->poll_api = poll_api;
-    nl->fd = fd;
-    nl->seq = 0;
-    nl->callback = cb;
-    nl->userdata = userdata;
-
-    if (!(nl->buffer = avahi_new(uint8_t, nl->buffer_length = 64*1024))) {
-        avahi_log_error(__FILE__": avahi_new() failed.");
-        goto fail;
-    }
-
-    if (!(nl->watch = poll_api->watch_new(poll_api, fd, AVAHI_WATCH_IN, socket_event, nl))) {
-        avahi_log_error(__FILE__": Failed to create watch.");
-        goto fail;
-    }
-
-    return nl;
-
-fail:
-
-    if (fd >= 0)
-        close(fd);
-
-    if (nl) {
-        avahi_free(nl->buffer);
-        avahi_free(nl);
-    }
-
-    return NULL;
-}
-
-void avahi_netlink_free(AvahiNetlink *nl) {
-    assert(nl);
-
-    if (nl->watch)
-        nl->poll_api->watch_free(nl->watch);
-
-    if (nl->fd >= 0)
-        close(nl->fd);
-
-    avahi_free(nl->buffer);
-    avahi_free(nl);
-}
-
-int avahi_netlink_send(AvahiNetlink *nl, struct nlmsghdr *m, unsigned *ret_seq) {
-    assert(nl);
-    assert(m);
-
-    m->nlmsg_seq = nl->seq++;
-    m->nlmsg_flags |= NLM_F_ACK;
-
-    if (send(nl->fd, m, m->nlmsg_len, 0) < 0) {
-        avahi_log_error(__FILE__": send(): %s", strerror(errno));
-        return -1;
-    }
-
-    if (ret_seq)
-        *ret_seq = m->nlmsg_seq;
-
-    return 0;
-}