diff options
| -rw-r--r-- | include/net/net.h | 13 | ||||
| -rw-r--r-- | net/filter-mirror.c | 66 | ||||
| -rw-r--r-- | net/net.c | 70 | ||||
| -rw-r--r-- | net/socket.c | 77 |
4 files changed, 121 insertions, 105 deletions
diff --git a/include/net/net.h b/include/net/net.h index 059a464212..50b10504c5 100644 --- a/include/net/net.h +++ b/include/net/net.h @@ -57,6 +57,8 @@ typedef void (SetOffload)(NetClientState *, int, int, int, int, int); typedef void (SetVnetHdrLen)(NetClientState *, int); typedef int (SetVnetLE)(NetClientState *, bool); typedef int (SetVnetBE)(NetClientState *, bool); +typedef struct SocketReadState SocketReadState; +typedef void (SocketReadStateFinalize)(SocketReadState *rs); typedef struct NetClientInfo { NetClientOptionsKind type; @@ -102,6 +104,15 @@ typedef struct NICState { bool peer_deleted; } NICState; +struct SocketReadState { + int state; /* 0 = getting length, 1 = getting data */ + uint32_t index; + uint32_t packet_len; + uint8_t buf[NET_BUFSIZE]; + SocketReadStateFinalize *finalize; +}; + +int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size); char *qemu_mac_strdup_printf(const uint8_t *macaddr); NetClientState *qemu_find_netdev(const char *id); int qemu_find_net_clients_except(const char *id, NetClientState **ncs, @@ -160,6 +171,8 @@ ssize_t qemu_deliver_packet_iov(NetClientState *sender, void print_net_client(Monitor *mon, NetClientState *nc); void hmp_info_network(Monitor *mon, const QDict *qdict); +void net_socket_rs_init(SocketReadState *rs, + SocketReadStateFinalize *finalize); /* NIC info */ diff --git a/net/filter-mirror.c b/net/filter-mirror.c index c0c4dc60b6..35df37451d 100644 --- a/net/filter-mirror.c +++ b/net/filter-mirror.c @@ -40,10 +40,7 @@ typedef struct MirrorState { char *outdev; CharDriverState *chr_in; CharDriverState *chr_out; - int state; /* 0 = getting length, 1 = getting data */ - unsigned int index; - unsigned int packet_len; - uint8_t buf[REDIRECTOR_MAX_LEN]; + SocketReadState rs; } MirrorState; static int filter_mirror_send(CharDriverState *chr_out, @@ -108,51 +105,12 @@ static void redirector_chr_read(void *opaque, const uint8_t *buf, int size) { NetFilterState *nf = opaque; MirrorState *s = FILTER_REDIRECTOR(nf); - unsigned int l; - - while (size > 0) { - /* reassemble a packet from the network */ - switch (s->state) { /* 0 = getting length, 1 = getting data */ - case 0: - l = 4 - s->index; - if (l > size) { - l = size; - } - memcpy(s->buf + s->index, buf, l); - buf += l; - size -= l; - s->index += l; - if (s->index == 4) { - /* got length */ - s->packet_len = ntohl(*(uint32_t *)s->buf); - s->index = 0; - s->state = 1; - } - break; - case 1: - l = s->packet_len - s->index; - if (l > size) { - l = size; - } - if (s->index + l <= sizeof(s->buf)) { - memcpy(s->buf + s->index, buf, l); - } else { - error_report("serious error: oversized packet received."); - s->index = s->state = 0; - qemu_chr_add_handlers(s->chr_in, NULL, NULL, NULL, NULL); - return; - } - - s->index += l; - buf += l; - size -= l; - if (s->index >= s->packet_len) { - s->index = 0; - s->state = 0; - redirector_to_filter(nf, s->buf, s->packet_len); - } - break; - } + int ret; + + ret = net_fill_rstate(&s->rs, buf, size); + + if (ret == -1) { + qemu_chr_add_handlers(s->chr_in, NULL, NULL, NULL, NULL); } } @@ -258,6 +216,14 @@ static void filter_mirror_setup(NetFilterState *nf, Error **errp) } } +static void redirector_rs_finalize(SocketReadState *rs) +{ + MirrorState *s = container_of(rs, MirrorState, rs); + NetFilterState *nf = NETFILTER(s); + + redirector_to_filter(nf, rs->buf, rs->packet_len); +} + static void filter_redirector_setup(NetFilterState *nf, Error **errp) { MirrorState *s = FILTER_REDIRECTOR(nf); @@ -274,7 +240,7 @@ static void filter_redirector_setup(NetFilterState *nf, Error **errp) } } - s->state = s->index = 0; + net_socket_rs_init(&s->rs, redirector_rs_finalize); if (s->indev) { s->chr_in = qemu_chr_find(s->indev); @@ -1550,3 +1550,73 @@ QemuOptsList qemu_net_opts = { { /* end of list */ } }, }; + +void net_socket_rs_init(SocketReadState *rs, + SocketReadStateFinalize *finalize) +{ + rs->state = 0; + rs->index = 0; + rs->packet_len = 0; + memset(rs->buf, 0, sizeof(rs->buf)); + rs->finalize = finalize; +} + +/* + * Returns + * 0: SocketReadState is not ready + * 1: SocketReadState is ready + * otherwise error occurs + */ +int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size) +{ + unsigned int l; + + while (size > 0) { + /* reassemble a packet from the network */ + switch (rs->state) { /* 0 = getting length, 1 = getting data */ + case 0: + l = 4 - rs->index; + if (l > size) { + l = size; + } + memcpy(rs->buf + rs->index, buf, l); + buf += l; + size -= l; + rs->index += l; + if (rs->index == 4) { + /* got length */ + rs->packet_len = ntohl(*(uint32_t *)rs->buf); + rs->index = 0; + rs->state = 1; + } + break; + case 1: + l = rs->packet_len - rs->index; + if (l > size) { + l = size; + } + if (rs->index + l <= sizeof(rs->buf)) { + memcpy(rs->buf + rs->index, buf, l); + } else { + fprintf(stderr, "serious error: oversized packet received," + "connection terminated.\n"); + rs->index = rs->state = 0; + return -1; + } + + rs->index += l; + buf += l; + size -= l; + if (rs->index >= rs->packet_len) { + rs->index = 0; + rs->state = 0; + if (rs->finalize) { + rs->finalize(rs); + } + return 1; + } + break; + } + } + return 0; +} diff --git a/net/socket.c b/net/socket.c index 9fa2cd8d51..333fb9ecfa 100644 --- a/net/socket.c +++ b/net/socket.c @@ -38,11 +38,8 @@ typedef struct NetSocketState { NetClientState nc; int listen_fd; int fd; - int state; /* 0 = getting length, 1 = getting data */ - unsigned int index; - unsigned int packet_len; + SocketReadState rs; unsigned int send_index; /* number of bytes sent (only SOCK_STREAM) */ - uint8_t buf[NET_BUFSIZE]; struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */ IOHandler *send_fn; /* differs between SOCK_STREAM/SOCK_DGRAM */ bool read_poll; /* waiting to receive data? */ @@ -143,11 +140,22 @@ static void net_socket_send_completed(NetClientState *nc, ssize_t len) } } +static void net_socket_rs_finalize(SocketReadState *rs) +{ + NetSocketState *s = container_of(rs, NetSocketState, rs); + + if (qemu_send_packet_async(&s->nc, rs->buf, + rs->packet_len, + net_socket_send_completed) == 0) { + net_socket_read_poll(s, false); + } +} + static void net_socket_send(void *opaque) { NetSocketState *s = opaque; int size; - unsigned l; + int ret; uint8_t buf1[NET_BUFSIZE]; const uint8_t *buf; @@ -166,61 +174,18 @@ static void net_socket_send(void *opaque) closesocket(s->fd); s->fd = -1; - s->state = 0; - s->index = 0; - s->packet_len = 0; + net_socket_rs_init(&s->rs, net_socket_rs_finalize); s->nc.link_down = true; - memset(s->buf, 0, sizeof(s->buf)); memset(s->nc.info_str, 0, sizeof(s->nc.info_str)); return; } buf = buf1; - while (size > 0) { - /* reassemble a packet from the network */ - switch(s->state) { - case 0: - l = 4 - s->index; - if (l > size) - l = size; - memcpy(s->buf + s->index, buf, l); - buf += l; - size -= l; - s->index += l; - if (s->index == 4) { - /* got length */ - s->packet_len = ntohl(*(uint32_t *)s->buf); - s->index = 0; - s->state = 1; - } - break; - case 1: - l = s->packet_len - s->index; - if (l > size) - l = size; - if (s->index + l <= sizeof(s->buf)) { - memcpy(s->buf + s->index, buf, l); - } else { - fprintf(stderr, "serious error: oversized packet received," - "connection terminated.\n"); - s->state = 0; - goto eoc; - } - s->index += l; - buf += l; - size -= l; - if (s->index >= s->packet_len) { - s->index = 0; - s->state = 0; - if (qemu_send_packet_async(&s->nc, s->buf, s->packet_len, - net_socket_send_completed) == 0) { - net_socket_read_poll(s, false); - break; - } - } - break; - } + ret = net_fill_rstate(&s->rs, buf, size); + + if (ret == -1) { + goto eoc; } } @@ -229,7 +194,7 @@ static void net_socket_send_dgram(void *opaque) NetSocketState *s = opaque; int size; - size = qemu_recv(s->fd, s->buf, sizeof(s->buf), 0); + size = qemu_recv(s->fd, s->rs.buf, sizeof(s->rs.buf), 0); if (size < 0) return; if (size == 0) { @@ -238,7 +203,7 @@ static void net_socket_send_dgram(void *opaque) net_socket_write_poll(s, false); return; } - if (qemu_send_packet_async(&s->nc, s->buf, size, + if (qemu_send_packet_async(&s->nc, s->rs.buf, size, net_socket_send_completed) == 0) { net_socket_read_poll(s, false); } @@ -401,6 +366,7 @@ static NetSocketState *net_socket_fd_init_dgram(NetClientState *peer, s->fd = fd; s->listen_fd = -1; s->send_fn = net_socket_send_dgram; + net_socket_rs_init(&s->rs, net_socket_rs_finalize); net_socket_read_poll(s, true); /* mcast: save bound address as dst */ @@ -451,6 +417,7 @@ static NetSocketState *net_socket_fd_init_stream(NetClientState *peer, s->fd = fd; s->listen_fd = -1; + net_socket_rs_init(&s->rs, net_socket_rs_finalize); /* Disable Nagle algorithm on TCP sockets to reduce latency */ socket_set_nodelay(fd); |