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Diffstat (limited to 'net.c')
-rw-r--r--net.c316
1 files changed, 239 insertions, 77 deletions
diff --git a/net.c b/net.c
index 18c51190bf..f26c3f804e 100644
--- a/net.c
+++ b/net.c
@@ -669,12 +669,14 @@ static void config_error(Monitor *mon, const char *fmt, ...)
/* slirp network adapter */
-#define SLIRP_CFG_REDIR 1
+#define SLIRP_CFG_HOSTFWD 1
+#define SLIRP_CFG_LEGACY 2
struct slirp_config_str {
struct slirp_config_str *next;
int flags;
char str[1024];
+ int legacy_format;
};
static int slirp_inited;
@@ -683,13 +685,14 @@ const char *legacy_tftp_prefix;
const char *legacy_bootp_filename;
static VLANClientState *slirp_vc;
-static void slirp_redirection(Monitor *mon, const char *redir_str);
-static void vmchannel_init(Monitor *mon, const char *config_str);
+static void slirp_hostfwd(Monitor *mon, const char *redir_str);
+static void slirp_guestfwd(Monitor *mon, const char *config_str,
+ int legacy_format);
#ifndef _WIN32
static const char *legacy_smb_export;
-static void slirp_smb(const char *exported_dir);
+static void slirp_smb(const char *exported_dir, struct in_addr vserver_addr);
#endif
int slirp_can_output(void)
@@ -731,31 +734,122 @@ static void net_slirp_cleanup(VLANClientState *vc)
}
static int net_slirp_init(Monitor *mon, VLANState *vlan, const char *model,
- const char *name, int restricted, const char *ip,
- const char *tftp_export, const char *bootfile,
- const char *smb_export)
+ const char *name, int restricted,
+ const char *vnetwork, const char *vhost,
+ const char *vhostname, const char *tftp_export,
+ const char *bootfile, const char *vdhcp_start,
+ const char *vnameserver, const char *smb_export,
+ const char *vsmbserver)
{
if (slirp_in_use) {
/* slirp only supports a single instance so far */
return -1;
}
if (!slirp_inited) {
+ /* default settings according to historic slirp */
+ struct in_addr net = { .s_addr = htonl(0x0a000000) }; /* 10.0.0.0 */
+ struct in_addr mask = { .s_addr = htonl(0xff000000) }; /* 255.0.0.0 */
+ struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
+ struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
+ struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
+#ifndef _WIN32
+ struct in_addr smbsrv = { .s_addr = 0 };
+#endif
+ char buf[20];
+ uint32_t addr;
+ int shift;
+ char *end;
+
if (!tftp_export) {
tftp_export = legacy_tftp_prefix;
}
if (!bootfile) {
bootfile = legacy_bootp_filename;
}
+
+ if (vnetwork) {
+ if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
+ if (!inet_aton(vnetwork, &net)) {
+ return -1;
+ }
+ addr = ntohl(net.s_addr);
+ if (!(addr & 0x80000000)) {
+ mask.s_addr = htonl(0xff000000); /* class A */
+ } else if ((addr & 0xfff00000) == 0xac100000) {
+ mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
+ } else if ((addr & 0xc0000000) == 0x80000000) {
+ mask.s_addr = htonl(0xffff0000); /* class B */
+ } else if ((addr & 0xffff0000) == 0xc0a80000) {
+ mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
+ } else if ((addr & 0xffff0000) == 0xc6120000) {
+ mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
+ } else if ((addr & 0xe0000000) == 0xe0000000) {
+ mask.s_addr = htonl(0xffffff00); /* class C */
+ } else {
+ mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
+ }
+ } else {
+ if (!inet_aton(buf, &net)) {
+ return -1;
+ }
+ shift = strtol(vnetwork, &end, 10);
+ if (*end != '\0') {
+ if (!inet_aton(vnetwork, &mask)) {
+ return -1;
+ }
+ } else if (shift < 4 || shift > 32) {
+ return -1;
+ } else {
+ mask.s_addr = htonl(0xffffffff << (32 - shift));
+ }
+ }
+ net.s_addr &= mask.s_addr;
+ host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
+ dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
+ dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
+ }
+
+ if (vhost && !inet_aton(vhost, &host)) {
+ return -1;
+ }
+ if ((host.s_addr & mask.s_addr) != net.s_addr) {
+ return -1;
+ }
+
+ if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
+ return -1;
+ }
+ if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
+ dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
+ return -1;
+ }
+
+ if (vnameserver && !inet_aton(vnameserver, &dns)) {
+ return -1;
+ }
+ if ((dns.s_addr & mask.s_addr) != net.s_addr ||
+ dns.s_addr == host.s_addr) {
+ return -1;
+ }
+
+#ifndef _WIN32
+ if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
+ return -1;
+ }
+#endif
+
+ slirp_init(restricted, net, mask, host, vhostname, tftp_export,
+ bootfile, dhcp, dns);
slirp_inited = 1;
- slirp_init(restricted, ip, tftp_export, bootfile);
while (slirp_configs) {
struct slirp_config_str *config = slirp_configs;
- if (config->flags & SLIRP_CFG_REDIR) {
- slirp_redirection(mon, config->str);
+ if (config->flags & SLIRP_CFG_HOSTFWD) {
+ slirp_hostfwd(mon, config->str);
} else {
- vmchannel_init(mon, config->str);
+ slirp_guestfwd(mon, config->str,
+ config->flags & SLIRP_CFG_LEGACY);
}
slirp_configs = config->next;
qemu_free(config);
@@ -765,7 +859,7 @@ static int net_slirp_init(Monitor *mon, VLANState *vlan, const char *model,
smb_export = legacy_smb_export;
}
if (smb_export) {
- slirp_smb(smb_export);
+ slirp_smb(smb_export, smbsrv);
}
#endif
}
@@ -777,7 +871,7 @@ static int net_slirp_init(Monitor *mon, VLANState *vlan, const char *model,
return 0;
}
-static void net_slirp_redir_rm(Monitor *mon, const char *port_str)
+static void net_slirp_hostfwd_remove(Monitor *mon, const char *port_str)
{
int host_port;
char buf[256] = "";
@@ -803,23 +897,24 @@ static void net_slirp_redir_rm(Monitor *mon, const char *port_str)
host_port = atoi(p);
- n = slirp_redir_rm(is_udp, host_port);
+ n = slirp_remove_hostfwd(is_udp, host_port);
- monitor_printf(mon, "removed %d redirections to %s port %d\n", n,
- is_udp ? "udp" : "tcp", host_port);
+ monitor_printf(mon, "removed %d host forwarding rules for %s port %d\n",
+ n, is_udp ? "udp" : "tcp", host_port);
return;
fail_syntax:
monitor_printf(mon, "invalid format\n");
}
-static void slirp_redirection(Monitor *mon, const char *redir_str)
+static void slirp_hostfwd(Monitor *mon, const char *redir_str)
{
- struct in_addr guest_addr;
+ struct in_addr guest_addr = { .s_addr = 0 };
int host_port, guest_port;
const char *p;
- char buf[256], *r;
+ char buf[256];
int is_udp;
+ char *end;
p = redir_str;
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
@@ -836,33 +931,31 @@ static void slirp_redirection(Monitor *mon, const char *redir_str)
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
goto fail_syntax;
}
- host_port = strtol(buf, &r, 0);
- if (r == buf) {
+ host_port = strtol(buf, &end, 0);
+ if (*end != '\0' || host_port < 1 || host_port > 65535) {
goto fail_syntax;
}
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
goto fail_syntax;
}
- if (buf[0] == '\0') {
- pstrcpy(buf, sizeof(buf), "10.0.2.15");
- }
- if (!inet_aton(buf, &guest_addr)) {
+ if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
goto fail_syntax;
}
- guest_port = strtol(p, &r, 0);
- if (r == p) {
+ guest_port = strtol(p, &end, 0);
+ if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
goto fail_syntax;
}
- if (slirp_redir(is_udp, host_port, guest_addr, guest_port) < 0) {
- config_error(mon, "could not set up redirection '%s'\n", redir_str);
+ if (slirp_add_hostfwd(is_udp, host_port, guest_addr, guest_port) < 0) {
+ config_error(mon, "could not set up host forwarding rule '%s'\n",
+ redir_str);
}
return;
fail_syntax:
- config_error(mon, "invalid redirection format '%s'\n", redir_str);
+ config_error(mon, "invalid host forwarding rule '%s'\n", redir_str);
}
void net_slirp_redir(Monitor *mon, const char *redir_str, const char *redir_opt2)
@@ -875,7 +968,7 @@ void net_slirp_redir(Monitor *mon, const char *redir_str, const char *redir_opt2
} else {
config = qemu_malloc(sizeof(*config));
pstrcpy(config->str, sizeof(config->str), redir_str);
- config->flags = SLIRP_CFG_REDIR;
+ config->flags = SLIRP_CFG_HOSTFWD;
config->next = slirp_configs;
slirp_configs = config;
}
@@ -883,11 +976,11 @@ void net_slirp_redir(Monitor *mon, const char *redir_str, const char *redir_opt2
}
if (!strcmp(redir_str, "remove")) {
- net_slirp_redir_rm(mon, redir_opt2);
+ net_slirp_hostfwd_remove(mon, redir_opt2);
return;
}
- slirp_redirection(mon, redir_str);
+ slirp_hostfwd(mon, redir_str);
}
#ifndef _WIN32
@@ -925,7 +1018,7 @@ static void smb_exit(void)
erase_dir(smb_dir);
}
-static void slirp_smb(const char *exported_dir)
+static void slirp_smb(const char *exported_dir, struct in_addr vserver_addr)
{
char smb_conf[1024];
char smb_cmdline[1024];
@@ -971,19 +1064,24 @@ static void slirp_smb(const char *exported_dir)
snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
SMBD_COMMAND, smb_conf);
- slirp_add_exec(0, smb_cmdline, 4, 139);
+ if (slirp_add_exec(0, smb_cmdline, vserver_addr, 139) < 0) {
+ fprintf(stderr, "conflicting/invalid smbserver address\n");
+ exit(1);
+ }
}
/* automatic user mode samba server configuration (legacy interface) */
void net_slirp_smb(const char *exported_dir)
{
+ struct in_addr vserver_addr = { .s_addr = 0 };
+
if (legacy_smb_export) {
fprintf(stderr, "-smb given twice\n");
exit(1);
}
legacy_smb_export = exported_dir;
if (slirp_inited) {
- slirp_smb(exported_dir);
+ slirp_smb(exported_dir, vserver_addr);
}
}
@@ -994,51 +1092,85 @@ void do_info_slirp(Monitor *mon)
slirp_stats();
}
-struct VMChannel {
+struct GuestFwd {
CharDriverState *hd;
+ struct in_addr server;
int port;
};
-static int vmchannel_can_read(void *opaque)
+static int guestfwd_can_read(void *opaque)
{
- struct VMChannel *vmc = (struct VMChannel*)opaque;
- return slirp_socket_can_recv(4, vmc->port);
+ struct GuestFwd *fwd = opaque;
+ return slirp_socket_can_recv(fwd->server, fwd->port);
}
-static void vmchannel_read(void *opaque, const uint8_t *buf, int size)
+static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
{
- struct VMChannel *vmc = (struct VMChannel*)opaque;
- slirp_socket_recv(4, vmc->port, buf, size);
+ struct GuestFwd *fwd = opaque;
+ slirp_socket_recv(fwd->server, fwd->port, buf, size);
}
-static void vmchannel_init(Monitor *mon, const char *config_str)
+static void slirp_guestfwd(Monitor *mon, const char *config_str,
+ int legacy_format)
{
- struct VMChannel *vmc;
- char *devname;
- char name[20];
+ struct in_addr server = { .s_addr = 0 };
+ struct GuestFwd *fwd;
+ const char *p;
+ char buf[128];
+ char *end;
int port;
- port = strtol(config_str, &devname, 10);
- if (port < 1 || port > 65535 || *devname != ':') {
- config_error(mon, "invalid vmchannel port number\n");
- return;
+ p = config_str;
+ if (legacy_format) {
+ if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
+ goto fail_syntax;
+ }
+ } else {
+ if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
+ goto fail_syntax;
+ }
+ if (strcmp(buf, "tcp") && buf[0] != '\0') {
+ goto fail_syntax;
+ }
+ if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
+ goto fail_syntax;
+ }
+ if (buf[0] != '\0' && !inet_aton(buf, &server)) {
+ goto fail_syntax;
+ }
+ if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
+ goto fail_syntax;
+ }
+ }
+ port = strtol(buf, &end, 10);
+ if (*end != '\0' || port < 1 || port > 65535) {
+ goto fail_syntax;
}
- devname++;
- vmc = qemu_malloc(sizeof(struct VMChannel));
- snprintf(name, sizeof(name), "vmchannel%d", port);
- vmc->hd = qemu_chr_open(name, devname, NULL);
- if (!vmc->hd) {
- config_error(mon, "could not open vmchannel device '%s'\n", devname);
- qemu_free(vmc);
+ fwd = qemu_malloc(sizeof(struct GuestFwd));
+ snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
+ fwd->hd = qemu_chr_open(buf, p, NULL);
+ if (!fwd->hd) {
+ config_error(mon, "could not open guest forwarding device '%s'\n",
+ buf);
+ qemu_free(fwd);
return;
}
- vmc->port = port;
+ fwd->server = server;
+ fwd->port = port;
- slirp_add_exec(3, vmc->hd, 4, port);
- qemu_chr_add_handlers(vmc->hd, vmchannel_can_read, vmchannel_read,
- NULL, vmc);
+ if (slirp_add_exec(3, fwd->hd, server, port) < 0) {
+ config_error(mon, "conflicting/invalid host:port in guest forwarding "
+ "rule '%s'\n", config_str);
+ qemu_free(fwd);
+ return;
+ }
+ qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
+ NULL, fwd);
return;
+
+ fail_syntax:
+ config_error(mon, "invalid guest forwarding rule '%s'\n", config_str);
}
#endif /* CONFIG_SLIRP */
@@ -2252,15 +2384,21 @@ int net_client_init(Monitor *mon, const char *device, const char *p)
#ifdef CONFIG_SLIRP
if (!strcmp(device, "user")) {
static const char * const slirp_params[] = {
- "vlan", "name", "hostname", "restrict", "ip", "tftp", "bootfile",
- "smb", "redir", "channel", NULL
+ "vlan", "name", "hostname", "restrict", "ip", "net", "host",
+ "tftp", "bootfile", "dhcpstart", "dns", "smb", "smbserver",
+ "hostfwd", "guestfwd", NULL
};
struct slirp_config_str *config;
+ int restricted = 0;
+ char *vnet = NULL;
+ char *vhost = NULL;
+ char *vhostname = NULL;
char *tftp_export = NULL;
char *bootfile = NULL;
+ char *vdhcp_start = NULL;
+ char *vnamesrv = NULL;
char *smb_export = NULL;
- int restricted = 0;
- char *ip = NULL;
+ char *vsmbsrv = NULL;
const char *q;
if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
@@ -2268,14 +2406,29 @@ int net_client_init(Monitor *mon, const char *device, const char *p)
ret = -1;
goto out;
}
+ if (get_param_value(buf, sizeof(buf), "ip", p)) {
+ /* emulate legacy parameter */
+ vnet = qemu_malloc(strlen(buf) + strlen("/24") + 1);
+ strcpy(vnet, buf);
+ strcat(vnet, "/24");
+ }
+ if (get_param_value(buf, sizeof(buf), "net", p)) {
+ vnet = qemu_strdup(buf);
+ }
+ if (get_param_value(buf, sizeof(buf), "host", p)) {
+ vhost = qemu_strdup(buf);
+ }
if (get_param_value(buf, sizeof(buf), "hostname", p)) {
- pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
+ vhostname = qemu_strdup(buf);
}
if (get_param_value(buf, sizeof(buf), "restrict", p)) {
restricted = (buf[0] == 'y') ? 1 : 0;
}
- if (get_param_value(buf, sizeof(buf), "ip", p)) {
- ip = qemu_strdup(buf);
+ if (get_param_value(buf, sizeof(buf), "dhcpstart", p)) {
+ vdhcp_start = qemu_strdup(buf);
+ }
+ if (get_param_value(buf, sizeof(buf), "dns", p)) {
+ vnamesrv = qemu_strdup(buf);
}
if (get_param_value(buf, sizeof(buf), "tftp", p)) {
tftp_export = qemu_strdup(buf);
@@ -2285,15 +2438,18 @@ int net_client_init(Monitor *mon, const char *device, const char *p)
}
if (get_param_value(buf, sizeof(buf), "smb", p)) {
smb_export = qemu_strdup(buf);
+ if (get_param_value(buf, sizeof(buf), "smbserver", p)) {
+ vsmbsrv = qemu_strdup(buf);
+ }
}
q = p;
while (1) {
config = qemu_malloc(sizeof(*config));
if (!get_next_param_value(config->str, sizeof(config->str),
- "redir", &q)) {
+ "hostfwd", &q)) {
break;
}
- config->flags = SLIRP_CFG_REDIR;
+ config->flags = SLIRP_CFG_HOSTFWD;
config->next = slirp_configs;
slirp_configs = config;
config = NULL;
@@ -2302,7 +2458,7 @@ int net_client_init(Monitor *mon, const char *device, const char *p)
while (1) {
config = qemu_malloc(sizeof(*config));
if (!get_next_param_value(config->str, sizeof(config->str),
- "channel", &q)) {
+ "guestfwd", &q)) {
break;
}
config->flags = 0;
@@ -2312,23 +2468,29 @@ int net_client_init(Monitor *mon, const char *device, const char *p)
}
qemu_free(config);
vlan->nb_host_devs++;
- ret = net_slirp_init(mon, vlan, device, name, restricted, ip,
- tftp_export, bootfile, smb_export);
- qemu_free(ip);
+ ret = net_slirp_init(mon, vlan, device, name, restricted, vnet, vhost,
+ vhostname, tftp_export, bootfile, vdhcp_start,
+ vnamesrv, smb_export, vsmbsrv);
+ qemu_free(vnet);
+ qemu_free(vhost);
+ qemu_free(vhostname);
qemu_free(tftp_export);
qemu_free(bootfile);
+ qemu_free(vdhcp_start);
+ qemu_free(vnamesrv);
qemu_free(smb_export);
+ qemu_free(vsmbsrv);
} else if (!strcmp(device, "channel")) {
if (!slirp_inited) {
struct slirp_config_str *config;
config = qemu_malloc(sizeof(*config));
pstrcpy(config->str, sizeof(config->str), p);
- config->flags = 0;
+ config->flags = SLIRP_CFG_LEGACY;
config->next = slirp_configs;
slirp_configs = config;
} else {
- vmchannel_init(mon, p);
+ slirp_guestfwd(mon, p, 1);
}
ret = 0;
} else
generated by cgit v1.2.1 (git 2.18.0) at 2024-07-09 16:02:09 +0000