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slirp: use polling callbacks, drop glib requirement
It would be legitimate to use libslirp without glib. Let's add_poll/get_revents pair of callbacks to provide the same functionality. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
This commit is contained in:
Marc-André Lureau
Samuel Thibault
parent
6e513a78ea
commit
deaeb3f71d
72
net/slirp.c
72
net/slirp.c
@ -211,6 +211,71 @@ static const SlirpCb slirp_cb = {
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.notify = qemu_notify_event,
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};
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static int slirp_poll_to_gio(int events)
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{
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int ret = 0;
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if (events & SLIRP_POLL_IN) {
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ret |= G_IO_IN;
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}
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if (events & SLIRP_POLL_OUT) {
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ret |= G_IO_OUT;
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}
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if (events & SLIRP_POLL_PRI) {
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ret |= G_IO_PRI;
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}
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if (events & SLIRP_POLL_ERR) {
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ret |= G_IO_ERR;
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}
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if (events & SLIRP_POLL_HUP) {
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ret |= G_IO_HUP;
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}
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return ret;
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}
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static int net_slirp_add_poll(int fd, int events, void *opaque)
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{
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GArray *pollfds = opaque;
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GPollFD pfd = {
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.fd = fd,
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.events = slirp_poll_to_gio(events),
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};
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int idx = pollfds->len;
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g_array_append_val(pollfds, pfd);
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return idx;
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}
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static int slirp_gio_to_poll(int events)
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{
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int ret = 0;
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if (events & G_IO_IN) {
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ret |= SLIRP_POLL_IN;
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}
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if (events & G_IO_OUT) {
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ret |= SLIRP_POLL_OUT;
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}
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if (events & G_IO_PRI) {
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ret |= SLIRP_POLL_PRI;
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}
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if (events & G_IO_ERR) {
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ret |= SLIRP_POLL_ERR;
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}
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if (events & G_IO_HUP) {
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ret |= SLIRP_POLL_HUP;
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}
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return ret;
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}
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static int net_slirp_get_revents(int idx, void *opaque)
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{
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GArray *pollfds = opaque;
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return slirp_gio_to_poll(g_array_index(pollfds, GPollFD, idx).revents);
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}
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static void net_slirp_poll_notify(Notifier *notifier, void *data)
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{
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MainLoopPoll *poll = data;
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@ -218,12 +283,13 @@ static void net_slirp_poll_notify(Notifier *notifier, void *data)
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switch (poll->state) {
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case MAIN_LOOP_POLL_FILL:
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slirp_pollfds_fill(s->slirp, poll->pollfds, &poll->timeout);
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slirp_pollfds_fill(s->slirp, &poll->timeout,
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net_slirp_add_poll, poll->pollfds);
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break;
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case MAIN_LOOP_POLL_OK:
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case MAIN_LOOP_POLL_ERR:
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slirp_pollfds_poll(s->slirp, poll->pollfds,
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poll->state == MAIN_LOOP_POLL_ERR);
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slirp_pollfds_poll(s->slirp, poll->state == MAIN_LOOP_POLL_ERR,
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net_slirp_get_revents, poll->pollfds);
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break;
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default:
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g_assert_not_reached();
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@ -1,7 +1,6 @@
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#ifndef LIBSLIRP_H
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#define LIBSLIRP_H
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#include <glib.h>
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#include <stdint.h>
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#include <stdbool.h>
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@ -15,8 +14,18 @@
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typedef struct Slirp Slirp;
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enum {
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SLIRP_POLL_IN = 1 << 0,
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SLIRP_POLL_OUT = 1 << 1,
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SLIRP_POLL_PRI = 1 << 2,
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SLIRP_POLL_ERR = 1 << 3,
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SLIRP_POLL_HUP = 1 << 4,
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};
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typedef ssize_t (*SlirpWriteCb)(const void *buf, size_t len, void *opaque);
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typedef void (*SlirpTimerCb)(void *opaque);
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typedef int (*SlirpAddPollCb)(int fd, int events, void *opaque);
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typedef int (*SlirpGetREventsCb)(int idx, void *opaque);
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/*
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* Callbacks from slirp
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@ -63,9 +72,11 @@ Slirp *slirp_init(int restricted, bool in_enabled, struct in_addr vnetwork,
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void *opaque);
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void slirp_cleanup(Slirp *slirp);
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void slirp_pollfds_fill(Slirp *slirp, GArray *pollfds, uint32_t *timeout);
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void slirp_pollfds_fill(Slirp *slirp, uint32_t *timeout,
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SlirpAddPollCb add_poll, void *opaque);
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void slirp_pollfds_poll(Slirp *slirp, GArray *pollfds, int select_error);
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void slirp_pollfds_poll(Slirp *slirp, int select_error,
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SlirpGetREventsCb get_revents, void *opaque);
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void slirp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len);
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@ -386,7 +386,8 @@ static void slirp_update_timeout(Slirp *slirp, uint32_t *timeout)
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*timeout = t;
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}
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void slirp_pollfds_fill(Slirp *slirp, GArray *pollfds, uint32_t *timeout)
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void slirp_pollfds_fill(Slirp *slirp, uint32_t *timeout,
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SlirpAddPollCb add_poll, void *opaque)
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{
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struct socket *so, *so_next;
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@ -428,12 +429,8 @@ void slirp_pollfds_fill(Slirp *slirp, GArray *pollfds, uint32_t *timeout)
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* Set for reading sockets which are accepting
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*/
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if (so->so_state & SS_FACCEPTCONN) {
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GPollFD pfd = {
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.fd = so->s,
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.events = G_IO_IN | G_IO_HUP | G_IO_ERR,
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};
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so->pollfds_idx = pollfds->len;
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g_array_append_val(pollfds, pfd);
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so->pollfds_idx = add_poll(so->s,
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SLIRP_POLL_IN | SLIRP_POLL_HUP | SLIRP_POLL_ERR, opaque);
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continue;
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}
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@ -441,12 +438,8 @@ void slirp_pollfds_fill(Slirp *slirp, GArray *pollfds, uint32_t *timeout)
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* Set for writing sockets which are connecting
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*/
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if (so->so_state & SS_ISFCONNECTING) {
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GPollFD pfd = {
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.fd = so->s,
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.events = G_IO_OUT | G_IO_ERR,
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};
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so->pollfds_idx = pollfds->len;
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g_array_append_val(pollfds, pfd);
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so->pollfds_idx = add_poll(so->s,
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SLIRP_POLL_OUT | SLIRP_POLL_ERR, opaque);
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continue;
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}
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@ -455,7 +448,7 @@ void slirp_pollfds_fill(Slirp *slirp, GArray *pollfds, uint32_t *timeout)
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* we have something to send
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*/
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if (CONN_CANFSEND(so) && so->so_rcv.sb_cc) {
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events |= G_IO_OUT | G_IO_ERR;
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events |= SLIRP_POLL_OUT | SLIRP_POLL_ERR;
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}
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/*
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@ -464,16 +457,12 @@ void slirp_pollfds_fill(Slirp *slirp, GArray *pollfds, uint32_t *timeout)
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*/
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if (CONN_CANFRCV(so) &&
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(so->so_snd.sb_cc < (so->so_snd.sb_datalen/2))) {
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events |= G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_PRI;
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events |= SLIRP_POLL_IN | SLIRP_POLL_HUP |
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SLIRP_POLL_ERR | SLIRP_POLL_PRI;
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}
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if (events) {
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GPollFD pfd = {
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.fd = so->s,
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.events = events,
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};
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so->pollfds_idx = pollfds->len;
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g_array_append_val(pollfds, pfd);
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so->pollfds_idx = add_poll(so->s, events, opaque);
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}
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}
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@ -508,12 +497,8 @@ void slirp_pollfds_fill(Slirp *slirp, GArray *pollfds, uint32_t *timeout)
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* (XXX <= 4 ?)
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*/
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if ((so->so_state & SS_ISFCONNECTED) && so->so_queued <= 4) {
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GPollFD pfd = {
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.fd = so->s,
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.events = G_IO_IN | G_IO_HUP | G_IO_ERR,
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};
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so->pollfds_idx = pollfds->len;
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g_array_append_val(pollfds, pfd);
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so->pollfds_idx = add_poll(so->s,
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SLIRP_POLL_IN | SLIRP_POLL_HUP | SLIRP_POLL_ERR, opaque);
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}
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}
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@ -538,19 +523,16 @@ void slirp_pollfds_fill(Slirp *slirp, GArray *pollfds, uint32_t *timeout)
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}
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if (so->so_state & SS_ISFCONNECTED) {
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GPollFD pfd = {
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.fd = so->s,
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.events = G_IO_IN | G_IO_HUP | G_IO_ERR,
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};
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so->pollfds_idx = pollfds->len;
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g_array_append_val(pollfds, pfd);
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so->pollfds_idx = add_poll(so->s,
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SLIRP_POLL_IN | SLIRP_POLL_HUP | SLIRP_POLL_ERR, opaque);
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}
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}
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slirp_update_timeout(slirp, timeout);
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}
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void slirp_pollfds_poll(Slirp *slirp, GArray *pollfds, int select_error)
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void slirp_pollfds_poll(Slirp *slirp, int select_error,
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SlirpGetREventsCb get_revents, void *opaque)
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{
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struct socket *so, *so_next;
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int ret;
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@ -587,8 +569,7 @@ void slirp_pollfds_poll(Slirp *slirp, GArray *pollfds, int select_error)
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revents = 0;
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if (so->pollfds_idx != -1) {
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revents = g_array_index(pollfds, GPollFD,
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so->pollfds_idx).revents;
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revents = get_revents(so->pollfds_idx, opaque);
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}
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if (so->so_state & SS_NOFDREF || so->s == -1) {
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@ -598,9 +579,9 @@ void slirp_pollfds_poll(Slirp *slirp, GArray *pollfds, int select_error)
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/*
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* Check for URG data
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* This will soread as well, so no need to
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* test for G_IO_IN below if this succeeds
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* test for SLIRP_POLL_IN below if this succeeds
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*/
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if (revents & G_IO_PRI) {
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if (revents & SLIRP_POLL_PRI) {
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ret = sorecvoob(so);
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if (ret < 0) {
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/* Socket error might have resulted in the socket being
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@ -611,7 +592,8 @@ void slirp_pollfds_poll(Slirp *slirp, GArray *pollfds, int select_error)
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/*
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* Check sockets for reading
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*/
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else if (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR)) {
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else if (revents &
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(SLIRP_POLL_IN | SLIRP_POLL_HUP | SLIRP_POLL_ERR)) {
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/*
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* Check for incoming connections
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*/
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@ -636,7 +618,7 @@ void slirp_pollfds_poll(Slirp *slirp, GArray *pollfds, int select_error)
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* Check sockets for writing
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*/
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if (!(so->so_state & SS_NOFDREF) &&
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(revents & (G_IO_OUT | G_IO_ERR))) {
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(revents & (SLIRP_POLL_OUT | SLIRP_POLL_ERR))) {
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/*
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* Check for non-blocking, still-connecting sockets
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*/
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@ -689,12 +671,11 @@ void slirp_pollfds_poll(Slirp *slirp, GArray *pollfds, int select_error)
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revents = 0;
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if (so->pollfds_idx != -1) {
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revents = g_array_index(pollfds, GPollFD,
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so->pollfds_idx).revents;
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revents = get_revents(so->pollfds_idx, opaque);
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}
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if (so->s != -1 &&
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(revents & (G_IO_IN | G_IO_HUP | G_IO_ERR))) {
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(revents & (SLIRP_POLL_IN | SLIRP_POLL_HUP | SLIRP_POLL_ERR))) {
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sorecvfrom(so);
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}
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}
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@ -710,12 +691,11 @@ void slirp_pollfds_poll(Slirp *slirp, GArray *pollfds, int select_error)
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revents = 0;
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if (so->pollfds_idx != -1) {
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revents = g_array_index(pollfds, GPollFD,
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so->pollfds_idx).revents;
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revents = get_revents(so->pollfds_idx, opaque);
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}
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if (so->s != -1 &&
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(revents & (G_IO_IN | G_IO_HUP | G_IO_ERR))) {
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(revents & (SLIRP_POLL_IN | SLIRP_POLL_HUP | SLIRP_POLL_ERR))) {
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icmp_receive(so);
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}
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}
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