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-rw-r--r--src/sf.jail/main.c525
1 files changed, 0 insertions, 525 deletions
diff --git a/src/sf.jail/main.c b/src/sf.jail/main.c
deleted file mode 100644
index d71511b..0000000
--- a/src/sf.jail/main.c
+++ /dev/null
@@ -1,525 +0,0 @@
-#include "../module/module.h"
-#include "../util.h"
-#include "state.h"
-
-#include <jail.h>
-#include <sys/param.h>
-#include <sys/jail.h>
-
-#include <netgraph.h>
-#include <netgraph/ng_message.h>
-#include <netgraph/ng_eiface.h>
-
-#include <sys/mount.h>
-#include <sys/ioctl.h>
-#include <fs/devfs/devfs.h>
-
-char const *Usage = "usage: %1$s start [name] [configuration]\n"
- " %1$s stop [name] [configuration] [data]\n"
- " %1$s get-endpoint [name] [configuration] [data] [interface]\n"
- " %1$s cmd [name] [configuration] [data] sh\n"
- " %1$s cmd [name] [configuration] [data] wireshark [interface]\n"
- "unsupported commands: mod\n";
-
-static configuration Configuration;
-static data Data;
-static bool ConfigurationLoaded;
-static bool DataLoaded;
-
-// HELPERS
-
-static void
-Free_all(void)
-{
- if(ConfigurationLoaded == true) Free_configuration(&Configuration);
- if(DataLoaded == true) Free_data(&Data);
-}
-
-static void
-Load_configuration(ucl_object_t *root)
-{
- char *Error = Parse_configuration(&Configuration, root, "");
- if(Error != NULL)
- {
- fprintf(stderr, "%s: configuration error: %s\n", Arg0, Error);
- free(Error);
- Free_all();
- exit(-1);
- }
- ConfigurationLoaded = true;
-}
-
-static void
-Load_data(ucl_object_t *root)
-{
- char *Error = Parse_data(&Data, root, "");
- if(Error != NULL)
- {
- fprintf(stderr, "%s: data error: %s\n", Arg0, Error);
- free(Error);
- Free_all();
- exit(-1);
- }
- DataLoaded = true;
- // TODO: check that data matches configuration
-}
-
-static int
-start_interface(interface *E, interface_configuration *C, fd Control, char const *JailName)
-{
- E->Type = C->Type;
- switch(C->Type)
- {
- case interface_type_eiface:
- {
- if(Create_eiface(&E->ID, Control) == -1) return -1;
- char *InterfaceName = getifname(E->ID, Control);
- if(InterfaceName == NULL)
- {
- DestroyNetgraphNode(E->ID, Control);
- return -1;
- }
- // NOTE: This first renames the interface and only then vnets it.
- int Result =
- command("ifconfig", "ifconfig", InterfaceName, "name", C->Name, "vnet", JailName, NULL);
- free(InterfaceName);
- return Result;
- }
- case interface_type_steal:
- {
- return command("ifconfig", "ifconfig", C->steal.Interface, "name", C->Name, "vnet", JailName, NULL);
- }
- case interface_type_COUNT:
- default: __builtin_unreachable();
- }
-}
-
-static int
-stop_interface(interface *E, interface_configuration *C, fd Control, char const *JailName)
-{
- switch(C->Type)
- {
- case interface_type_eiface: return DestroyNetgraphNode(E->ID, Control);
- case interface_type_steal:
- {
- return command("ifconfig",
- "ifconfig",
- C->Name,
- "-vnet",
- JailName,
- "name",
- C->steal.Interface,
- NULL);
- }
- case interface_type_COUNT:
- default: __builtin_unreachable();
- }
-}
-
-static int
-stop_interfaces(interfaces *E, interfaces_configuration *C, fd Control, char const *JailName)
-{
- for(size_t i = 0; i < E->Count; ++i)
- {
- if(stop_interface(E->_ + i, C->_ + i, Control, JailName) == -1)
- {
- fprintf(stderr, "failed to stop interface '%s'\n", C->_[i].Name);
- return -1;
- }
- }
- return 0;
-}
-
-static int
-start_interfaces(interfaces *E, interfaces_configuration *C, fd Control, char const *Name)
-{
- Data.Interfaces._ = calloc(sizeof(interface), Configuration.Interfaces.Count);
- for(E->Count = 0; E->Count < C->Count; ++E->Count)
- {
- interface *E_ = E->_ + E->Count;
- interface_configuration *C_ = C->_ + E->Count;
- if(start_interface(E_, C_, Control, Name) == -1) goto error;
- }
- return 0;
-error:
- stop_interfaces(E, C, Control, Name);
- Free_interfaces(E);
- return -1;
-}
-
-static int
-start_jail(jid_t *JID, char const *Name, char const *Path)
-{
- *JID = jail_setv(JAIL_CREATE, "name", Name, "vnet", "new", "persist", "true", "path", Path, NULL);
- if(*JID == -1)
- {
- fprintf(stderr, "jail creation failed: %s\n", strerror(errno));
- return -1;
- }
- return 0;
-}
-
-static int
-stop_jail(jid_t JID)
-{
- if(jail_remove(JID) == -1)
- {
- fprintf(stderr, "jail removal failed: %s\n", strerror(errno));
- Free_all();
- return -1;
- }
- return 0;
-}
-
-NAMED_ENUM(mapping_type, unionfs_below, unionfs, devfs, nullfs);
-
-static int
-mapping_mount(mapping *M, char const *TargetPrefix, mapping_type Type)
-{
- char Target[MAXPATHLEN];
- snprintf(Target, sizeof(Target), "%s/%s", TargetPrefix, M->Target);
- if(mkdir(Target, 755) == -1)
- {
- if(errno != EEXIST)
- {
- fprintf(stderr, "mkdir %s: %s\n", Target, strerror(errno));
- return -1;
- }
- }
- switch(Type)
- {
- case mapping_type_unionfs_below: return mount_unionfs(Target, M->Source, true);
- case mapping_type_unionfs: return mount_unionfs(Target, M->Source, false);
- case mapping_type_devfs: return mount_devfs(Target);
- case mapping_type_nullfs: return mount_nullfs(Target, M->Source);
- case mapping_type_COUNT:
- default: __builtin_unreachable();
- }
-}
-
-static int
-mapping_umount(char const *TargetPrefix, char const *Target_)
-{
- char Target[MAXPATHLEN];
- snprintf(Target, sizeof(Target), "%s/%s", TargetPrefix, Target_);
- // NOTE: unmount fails because some processes somehow still hold a reference to the jail FS
- while(unmount(Target, MNT_FORCE) == -1)
- {
- fprintf(stderr, "unmount %s failed: %s\n", Target, strerror(errno));
- if(errno != EBUSY) return -1;
- sleep(1);
- }
- return 0;
-}
-
-static int
-rm(char const *Path)
-{
- pid_t PID = fork();
- if(PID == -1) return -1;
- if(PID == 0)
- {
- close(STDIN_FILENO);
- dup2(STDERR_FILENO, STDOUT_FILENO);
- close_all();
- fprintf(stderr, "rm -r %s\n", Path);
- execlp("rm", "rm", "-r", Path, NULL);
- exit(-1);
- }
- int Exit;
- waitpid(PID, &Exit, 0);
- if(!WIFEXITED(Exit) || (WEXITSTATUS(Exit) != 0)) return -1;
- return 0;
-}
-
-static int
-ApplyDevfsRuleset(char const *Prefix, s64 Ruleset)
-{
- if(Ruleset == 0) return 0;
- devfs_rsnum RS = (devfs_rsnum)Ruleset;
- if(RS != Ruleset)
- {
- fprintf(stderr, "Ruleset invalid: %ld\n", Ruleset);
- return -1;
- }
- char Path[MAXPATHLEN];
- snprintf(Path, sizeof(Path), "%s/dev", Prefix);
- fd DevFD = open(Path, O_RDONLY);
- if(DevFD == -1)
- {
- fprintf(stderr, "open '%s' failed: %s\n", Path, strerror(errno));
- return -1;
- }
- if(ioctl(DevFD, DEVFSIO_SAPPLY, &RS) == -1)
- {
- fprintf(stderr, "ruleset %hu apply failed: %s\n", RS, strerror(errno));
- close(DevFD);
- return -1;
- }
- close(DevFD);
- return 0;
-}
-
-static int
-start_fs(filesystem_configuration *E, char const *Path)
-{
- bool CreatedPath = false;
- size_t LayerAt = 0;
- size_t VolumeAt = 0;
- bool Mounted_devfs = false;
- bool Mounted_temporary = false;
- if(mkdir(Path, 0755) == -1)
- {
- fprintf(stderr, "mkdir %s: %s\n", Path, strerror(errno));
- goto error;
- }
- CreatedPath = true;
- for(LayerAt = 0; LayerAt < E->LayerCount; ++LayerAt)
- {
- if(mapping_mount(&(mapping){ .Source = E->Layer[LayerAt], .Target = "/" },
- Path,
- mapping_type_unionfs_below) == -1)
- goto error;
- }
- if(E->Temporary != NULL)
- {
- if(mkdir(E->Temporary, 755) == -1)
- {
- if(errno != EEXIST)
- {
- fprintf(stderr, "mkdir %s: %s\n", E->Temporary, strerror(errno));
- goto error;
- }
- }
- if(mapping_mount(&(mapping){ .Source = E->Temporary, .Target = "/" }, Path, mapping_type_unionfs) == -1)
- goto error;
- }
- Mounted_temporary = true;
- if(mapping_mount(&(mapping){ .Target = "/dev" }, Path, mapping_type_devfs) == -1) goto error;
- if(ApplyDevfsRuleset(Path, E->DevfsRuleset) == -1) goto error;
- for(VolumeAt = 0; VolumeAt < E->VolumeCount; ++VolumeAt)
- {
- if(mapping_mount(E->Volume + VolumeAt, Path, mapping_type_nullfs) == -1) goto error;
- }
- return 0;
-error:
- for(size_t i = 0; i < VolumeAt; ++i) mapping_umount(Path, E->Volume[E->VolumeCount - 1 - i].Target);
- if(Mounted_devfs) mapping_umount(Path, "/dev");
- if(Mounted_temporary) mapping_umount(Path, "/");
- for(size_t i = 0; i < LayerAt; ++i) mapping_umount(Path, "/");
- if(CreatedPath) rm(Path);
- return -1;
-}
-
-static int
-stop_fs(filesystem_configuration *E, char const *Path)
-{
- for(size_t i = 0; i < E->VolumeCount; ++i) mapping_umount(Path, E->Volume[E->VolumeCount - 1 - i].Target);
- mapping_umount(Path, "/dev");
- if(E->Temporary != NULL) mapping_umount(Path, "/");
- for(size_t i = 0; i < E->LayerCount; ++i) mapping_umount(Path, "/");
- if(rm(Path) == -1)
- {
- fprintf(stderr, "rm -r %s: %s\n", Path, strerror(errno));
- goto error;
- }
- return 0;
-error:
- return -1;
-}
-
-static bool
-ValidJailName(char const *Name)
-{
- for(char const *At = Name; *At; ++At)
- {
- if(isnumber(*At) == false) return true;
- }
- return true;
-}
-
-// COMMANDS
-
-static char const *FilesystemPrefix = "/tmp/sf";
-
-int
-start(char const *Name, ucl_object_t *configuration)
-{
- if(ValidJailName(Name) == false) return -1;
- Load_configuration(configuration);
- fd Control = -1;
- Data.JID = -1;
- char Path[PATH_MAX];
- snprintf(Path, sizeof(Path), "%s/%s", FilesystemPrefix, Name);
- if(mkdir(FilesystemPrefix, 0755) == -1)
- {
- if(errno != EEXIST)
- {
- fprintf(stderr, "mkdir %s: %s\n", FilesystemPrefix, strerror(errno));
- goto error;
- }
- }
- if(start_fs(&Configuration.Filesystem, Path) == -1) goto error;
- if(start_jail(&Data.JID, Name, Path) == -1) goto error;
- if(NgMkSockNode(NULL, &Control, NULL) == -1)
- {
- fprintf(stderr, "Failed to create netgraph socket: %s\n", strerror(errno));
- goto error;
- }
- if(start_interfaces(&Data.Interfaces, &Configuration.Interfaces, Control, Name) == -1)
- {
- fprintf(stderr, "failed to start interfaces\n");
- goto error;
- }
- DataLoaded = true;
- close(Control);
- exec_string_array(&Configuration.Init, false, Data.JID);
- jprint_state S;
- bzero(&S, sizeof(S));
- S.F = stdout;
- Save_data(&S, &Data);
- Free_all();
- return 0;
-error:
- if(Control != -1) close(Control);
- if(Data.JID != -1) stop_jail(Data.JID);
- Free_all();
- return -1;
-}
-
-int
-stop(char const *Name, ucl_object_t *configuration, ucl_object_t *data)
-{
- if(ValidJailName(Name) == false) return -1;
- Load_configuration(configuration);
- Load_data(data);
- exec_string_array(&Configuration.Shutdown, true, Data.JID);
- fd Control = -1;
- if(NgMkSockNode(NULL, &Control, NULL) == -1)
- {
- fprintf(stderr, "Failed to create netgraph socket: %s\n", strerror(errno));
- goto error;
- }
- if(stop_interfaces(&Data.Interfaces, &Configuration.Interfaces, Control, Name) == -1) goto error;
- if(stop_jail(Data.JID) == -1) goto error;
- char Path[PATH_MAX];
- snprintf(Path, sizeof(Path), "%s/%s", FilesystemPrefix, Name);
- if(stop_fs(&Configuration.Filesystem, Path) == -1) goto error;
- Free_all();
- return 0;
-error:
- Free_all();
- return -1;
-}
-
-int
-get_endpoint(char const *Name, ucl_object_t *configuration, ucl_object_t *data, char const *Interface)
-{
- if(ValidJailName(Name) == false) return -1;
- Load_configuration(configuration);
- Load_data(data);
- for(size_t i = 0; i < Configuration.Interfaces.Count; ++i)
- {
- interface_configuration *C = Configuration.Interfaces._ + i;
- if(strcmp(C->Name, Interface) == 0)
- {
- interface *E = Data.Interfaces._ + i;
- jprint_state S;
- bzero(&S, sizeof(S));
- S.F = stdout;
- JPrintObjectBegin(&S);
- JPrintMember(&S, "address");
- char Address[NG_PATHSIZ];
- snprintf(Address, sizeof(Address), "[%x]:", E->ID);
- JPrint_string(&S, Address);
- JPrintMember(&S, "hook");
- JPrint_string(&S, "ether");
- JPrintObjectEnd(&S);
- Free_all();
- return 0;
- }
- }
- Free_all();
- return -1;
-}
-
-int
-cmd(char const *Name, ucl_object_t *configuration, ucl_object_t *data, size_t ArgCount, char **Arg)
-{
- if(ValidJailName(Name) == false) return -1;
- Load_configuration(configuration);
- Load_data(data);
- if(ArgCount < 1) usage();
- char const *Command = Arg[0];
- --ArgCount;
- ++Arg;
- if(strcmp(Command, "sh") == 0)
- {
- size_t ExtraArguments = 2;
- char **Args = alloca(sizeof(char *) * (ArgCount + ExtraArguments + 1));
- Args[0] = "jexec";
- Args[1] = strdup(Name);
- memcpy(Args + ExtraArguments, Arg, sizeof(char *) * ArgCount);
- Args[ArgCount + ExtraArguments] = NULL;
- execvp("jexec", Args);
- fprintf(stderr, "execvp failed: %s\n", strerror(errno));
- exit(-1);
- } else if(strcmp(Command, "wireshark") == 0)
- {
- if(ArgCount < 1) usage();
- char const *Interface = Arg[0];
- --ArgCount;
- ++Arg;
- fd Pipe[2];
- if(pipe(Pipe) == -1)
- {
- fprintf(stderr, "pipe: %s\n", strerror(errno));
- return -1;
- }
- pid_t PID = fork();
- if(PID == -1)
- {
- fprintf(stderr, "fork: %s\n", strerror(errno));
- return -1;
- } else if(PID == 0)
- {
- dup2(Pipe[1], STDOUT_FILENO);
- close(Pipe[0]);
- close(Pipe[1]);
- close_all();
- if(jail_attach(Data.JID))
- {
- fprintf(stderr, "jail_attach(%d): %s\n", Data.JID, strerror(errno));
- exit(-1);
- }
- execlp("tcpdump", "tcpdump", "-s", "-0", "-U", "-w", "-", "-i", Interface, NULL);
- fprintf(stderr, "execlp failed: %s\n", strerror(errno));
- exit(-1);
- } else
- {
- dup2(Pipe[0], STDIN_FILENO);
- close(Pipe[0]);
- close(Pipe[1]);
- close_all();
- char Title[64];
- snprintf(Title, sizeof(Title), "gui.window_title:%s:%s", Name, Interface);
- execlp("wireshark", "wireshark", "-o", Title, "-k", "-i", "-", NULL);
- fprintf(stderr, "execlp failed: %s\n", strerror(errno));
- exit(-1);
- }
- } else
- {
- fprintf(stderr, "unknown command %s\n", Command);
- usage();
- }
-}
-
-int
-mod(char const *Name, ucl_object_t *configuration, ucl_object_t *data, size_t ArgCount, char **Arg)
-{
- if(ValidJailName(Name) == false) return -1;
- Load_configuration(configuration);
- Load_data(data);
- UNUSED(ArgCount, Arg);
- usage();
-}
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