diff options
Diffstat (limited to 'src/fnet')
-rw-r--r-- | src/fnet/Makefile.in | 43 | ||||
-rw-r--r-- | src/fnet/fnet.h | 40 | ||||
-rw-r--r-- | src/fnet/interface.c | 183 | ||||
-rw-r--r-- | src/fnet/main.c | 70 | ||||
-rw-r--r-- | src/fnet/veth.c | 230 |
5 files changed, 566 insertions, 0 deletions
diff --git a/src/fnet/Makefile.in b/src/fnet/Makefile.in new file mode 100644 index 000000000..1bfb4c68d --- /dev/null +++ b/src/fnet/Makefile.in | |||
@@ -0,0 +1,43 @@ | |||
1 | all: fnet | ||
2 | |||
3 | prefix=@prefix@ | ||
4 | exec_prefix=@exec_prefix@ | ||
5 | libdir=@libdir@ | ||
6 | sysconfdir=@sysconfdir@ | ||
7 | |||
8 | VERSION=@PACKAGE_VERSION@ | ||
9 | NAME=@PACKAGE_NAME@ | ||
10 | HAVE_SECCOMP_H=@HAVE_SECCOMP_H@ | ||
11 | HAVE_SECCOMP=@HAVE_SECCOMP@ | ||
12 | HAVE_CHROOT=@HAVE_CHROOT@ | ||
13 | HAVE_BIND=@HAVE_BIND@ | ||
14 | HAVE_FATAL_WARNINGS=@HAVE_FATAL_WARNINGS@ | ||
15 | HAVE_NETWORK=@HAVE_NETWORK@ | ||
16 | HAVE_USERNS=@HAVE_USERNS@ | ||
17 | HAVE_X11=@HAVE_X11@ | ||
18 | HAVE_FILE_TRANSFER=@HAVE_FILE_TRANSFER@ | ||
19 | HAVE_WHITELIST=@HAVE_WHITELIST@ | ||
20 | HAVE_GLOBALCFG=@HAVE_GLOBALCFG@ | ||
21 | HAVE_APPARMOR=@HAVE_APPARMOR@ | ||
22 | HAVE_OVERLAYFS=@HAVE_OVERLAYFS@ | ||
23 | HAVE_PRIVATE_HOME=@HAVE_PRIVATE_HOME@ | ||
24 | EXTRA_LDFLAGS +=@EXTRA_LDFLAGS@ | ||
25 | |||
26 | H_FILE_LIST = $(sort $(wildcard *.[h])) | ||
27 | C_FILE_LIST = $(sort $(wildcard *.c)) | ||
28 | OBJS = $(C_FILE_LIST:.c=.o) | ||
29 | BINOBJS = $(foreach file, $(OBJS), $file) | ||
30 | CFLAGS += -ggdb $(HAVE_FATAL_WARNINGS) -O2 -DVERSION='"$(VERSION)"' -DPREFIX='"$(prefix)"' -DSYSCONFDIR='"$(sysconfdir)/firejail"' -DLIBDIR='"$(libdir)"' $(HAVE_X11) $(HAVE_PRIVATE_HOME) $(HAVE_APPARMOR) $(HAVE_OVERLAYFS) $(HAVE_SECCOMP) $(HAVE_GLOBALCFG) $(HAVE_SECCOMP_H) $(HAVE_CHROOT) $(HAVE_NETWORK) $(HAVE_USERNS) $(HAVE_BIND) $(HAVE_FILE_TRANSFER) $(HAVE_WHITELIST) -fstack-protector-all -D_FORTIFY_SOURCE=2 -fPIE -pie -Wformat -Wformat-security | ||
31 | LDFLAGS += -pie -Wl,-z,relro -Wl,-z,now -lpthread | ||
32 | |||
33 | %.o : %.c $(H_FILE_LIST) ../include/common.h ../include/euid_common.h ../include/libnetlink.h ../include/pid.h | ||
34 | $(CC) $(CFLAGS) $(INCLUDE) -c $< -o $@ | ||
35 | |||
36 | fnet: $(OBJS) ../lib/libnetlink.o ../lib/common.o | ||
37 | $(CC) $(LDFLAGS) -o $@ $(OBJS) ../lib/libnetlink.o ../lib/common.o $(LIBS) $(EXTRA_LDFLAGS) | ||
38 | |||
39 | clean:; rm -f *.o fnet | ||
40 | |||
41 | distclean: clean | ||
42 | rm -fr Makefile | ||
43 | |||
diff --git a/src/fnet/fnet.h b/src/fnet/fnet.h new file mode 100644 index 000000000..58efbbed5 --- /dev/null +++ b/src/fnet/fnet.h | |||
@@ -0,0 +1,40 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2014-2016 Firejail Authors | ||
3 | * | ||
4 | * This file is part of firejail project | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or modify | ||
7 | * it under the terms of the GNU General Public License as published by | ||
8 | * the Free Software Foundation; either version 2 of the License, or | ||
9 | * (at your option) any later version. | ||
10 | * | ||
11 | * This program is distributed in the hope that it will be useful, | ||
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
14 | * GNU General Public License for more details. | ||
15 | * | ||
16 | * You should have received a copy of the GNU General Public License along | ||
17 | * with this program; if not, write to the Free Software Foundation, Inc., | ||
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
19 | */ | ||
20 | #ifndef FNET_H | ||
21 | #define FNET_H | ||
22 | |||
23 | #include <stdio.h> | ||
24 | #include <stdlib.h> | ||
25 | #include <string.h> | ||
26 | #include <assert.h> | ||
27 | #include "../include/common.h" | ||
28 | |||
29 | // veth.c | ||
30 | int net_create_veth(const char *dev, const char *nsdev, unsigned pid); | ||
31 | int net_create_macvlan(const char *dev, const char *parent, unsigned pid); | ||
32 | int net_move_interface(const char *dev, unsigned pid); | ||
33 | |||
34 | // interface.c | ||
35 | void net_bridge_add_interface(const char *bridge, const char *dev); | ||
36 | void net_if_up(const char *ifname); | ||
37 | int net_get_mtu(const char *ifname); | ||
38 | void net_set_mtu(const char *ifname, int mtu); | ||
39 | |||
40 | #endif | ||
diff --git a/src/fnet/interface.c b/src/fnet/interface.c new file mode 100644 index 000000000..b1903dd46 --- /dev/null +++ b/src/fnet/interface.c | |||
@@ -0,0 +1,183 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2014-2016 Firejail Authors | ||
3 | * | ||
4 | * This file is part of firejail project | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or modify | ||
7 | * it under the terms of the GNU General Public License as published by | ||
8 | * the Free Software Foundation; either version 2 of the License, or | ||
9 | * (at your option) any later version. | ||
10 | * | ||
11 | * This program is distributed in the hope that it will be useful, | ||
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
14 | * GNU General Public License for more details. | ||
15 | * | ||
16 | * You should have received a copy of the GNU General Public License along | ||
17 | * with this program; if not, write to the Free Software Foundation, Inc., | ||
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
19 | */ | ||
20 | |||
21 | #include "fnet.h" | ||
22 | #include <arpa/inet.h> | ||
23 | #include <sys/socket.h> | ||
24 | #include <sys/ioctl.h> | ||
25 | #include <netdb.h> | ||
26 | #include <ifaddrs.h> | ||
27 | #include <net/if.h> | ||
28 | #include <net/if_arp.h> | ||
29 | #include <net/route.h> | ||
30 | #include <linux/if_bridge.h> | ||
31 | |||
32 | // add a veth device to a bridge | ||
33 | void net_bridge_add_interface(const char *bridge, const char *dev) { | ||
34 | if (strlen(bridge) > IFNAMSIZ) { | ||
35 | fprintf(stderr, "Error fnet: invalid network device name %s\n", bridge); | ||
36 | exit(1); | ||
37 | } | ||
38 | |||
39 | // somehow adding the interface to the bridge resets MTU on bridge device!!! | ||
40 | // workaround: restore MTU on the bridge device | ||
41 | // todo: put a real fix in | ||
42 | int mtu1 = net_get_mtu(bridge); | ||
43 | |||
44 | struct ifreq ifr; | ||
45 | int err; | ||
46 | int ifindex = if_nametoindex(dev); | ||
47 | |||
48 | if (ifindex <= 0) | ||
49 | errExit("if_nametoindex"); | ||
50 | |||
51 | int sock; | ||
52 | if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) | ||
53 | errExit("socket"); | ||
54 | |||
55 | memset(&ifr, 0, sizeof(ifr)); | ||
56 | strncpy(ifr.ifr_name, bridge, IFNAMSIZ); | ||
57 | #ifdef SIOCBRADDIF | ||
58 | ifr.ifr_ifindex = ifindex; | ||
59 | err = ioctl(sock, SIOCBRADDIF, &ifr); | ||
60 | if (err < 0) | ||
61 | #endif | ||
62 | { | ||
63 | unsigned long args[4] = { BRCTL_ADD_IF, ifindex, 0, 0 }; | ||
64 | |||
65 | ifr.ifr_data = (char *) args; | ||
66 | err = ioctl(sock, SIOCDEVPRIVATE, &ifr); | ||
67 | } | ||
68 | (void) err; | ||
69 | close(sock); | ||
70 | |||
71 | int mtu2 = net_get_mtu(bridge); | ||
72 | if (mtu1 != mtu2) { | ||
73 | net_set_mtu(bridge, mtu1); | ||
74 | } | ||
75 | } | ||
76 | |||
77 | |||
78 | // bring interface up | ||
79 | void net_if_up(const char *ifname) { | ||
80 | if (strlen(ifname) > IFNAMSIZ) { | ||
81 | fprintf(stderr, "Error fnet: invalid network device name %s\n", ifname); | ||
82 | exit(1); | ||
83 | } | ||
84 | |||
85 | int sock = socket(AF_INET,SOCK_DGRAM,0); | ||
86 | if (sock < 0) | ||
87 | errExit("socket"); | ||
88 | |||
89 | // get the existing interface flags | ||
90 | struct ifreq ifr; | ||
91 | memset(&ifr, 0, sizeof(ifr)); | ||
92 | strncpy(ifr.ifr_name, ifname, IFNAMSIZ); | ||
93 | ifr.ifr_addr.sa_family = AF_INET; | ||
94 | |||
95 | // read the existing flags | ||
96 | if (ioctl(sock, SIOCGIFFLAGS, &ifr ) < 0) { | ||
97 | close(sock); | ||
98 | printf("Error fnet: cannot bring up interface %s\n", ifname); | ||
99 | errExit("ioctl"); | ||
100 | } | ||
101 | |||
102 | ifr.ifr_flags |= IFF_UP; | ||
103 | |||
104 | // set the new flags | ||
105 | if (ioctl( sock, SIOCSIFFLAGS, &ifr ) < 0) { | ||
106 | close(sock); | ||
107 | printf("Error fnet: cannot bring up interface %s\n", ifname); | ||
108 | errExit("ioctl"); | ||
109 | } | ||
110 | |||
111 | // checking | ||
112 | // read the existing flags | ||
113 | if (ioctl(sock, SIOCGIFFLAGS, &ifr ) < 0) { | ||
114 | close(sock); | ||
115 | printf("Error fnet: cannot bring up interface %s\n", ifname); | ||
116 | errExit("ioctl"); | ||
117 | } | ||
118 | |||
119 | // wait not more than 500ms for the interface to come up | ||
120 | int cnt = 0; | ||
121 | while (cnt < 50) { | ||
122 | usleep(10000); // sleep 10ms | ||
123 | |||
124 | // read the existing flags | ||
125 | if (ioctl(sock, SIOCGIFFLAGS, &ifr ) < 0) { | ||
126 | close(sock); | ||
127 | printf("Error fnet: cannot bring up interface %s\n", ifname); | ||
128 | errExit("ioctl"); | ||
129 | } | ||
130 | if (ifr.ifr_flags & IFF_RUNNING) | ||
131 | break; | ||
132 | cnt++; | ||
133 | } | ||
134 | |||
135 | close(sock); | ||
136 | } | ||
137 | |||
138 | int net_get_mtu(const char *ifname) { | ||
139 | int mtu = 0; | ||
140 | if (strlen(ifname) > IFNAMSIZ) { | ||
141 | fprintf(stderr, "Error fnet: invalid network device name %s\n", ifname); | ||
142 | exit(1); | ||
143 | } | ||
144 | |||
145 | int s; | ||
146 | struct ifreq ifr; | ||
147 | |||
148 | if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) | ||
149 | errExit("socket"); | ||
150 | |||
151 | memset(&ifr, 0, sizeof(ifr)); | ||
152 | ifr.ifr_addr.sa_family = AF_INET; | ||
153 | strncpy(ifr.ifr_name, ifname, IFNAMSIZ); | ||
154 | if (ioctl(s, SIOCGIFMTU, (caddr_t)&ifr) == 0) | ||
155 | mtu = ifr.ifr_mtu; | ||
156 | close(s); | ||
157 | |||
158 | |||
159 | return mtu; | ||
160 | } | ||
161 | |||
162 | void net_set_mtu(const char *ifname, int mtu) { | ||
163 | if (strlen(ifname) > IFNAMSIZ) { | ||
164 | fprintf(stderr, "Error fnet: invalid network device name %s\n", ifname); | ||
165 | exit(1); | ||
166 | } | ||
167 | |||
168 | int s; | ||
169 | struct ifreq ifr; | ||
170 | |||
171 | if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) | ||
172 | errExit("socket"); | ||
173 | |||
174 | memset(&ifr, 0, sizeof(ifr)); | ||
175 | ifr.ifr_addr.sa_family = AF_INET; | ||
176 | strncpy(ifr.ifr_name, ifname, IFNAMSIZ); | ||
177 | ifr.ifr_mtu = mtu; | ||
178 | if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) != 0) | ||
179 | fprintf(stderr, "Warning fnet: cannot set mtu for interface %s\n", ifname); | ||
180 | close(s); | ||
181 | } | ||
182 | |||
183 | |||
diff --git a/src/fnet/main.c b/src/fnet/main.c new file mode 100644 index 000000000..f17287cb9 --- /dev/null +++ b/src/fnet/main.c | |||
@@ -0,0 +1,70 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2014-2016 Firejail Authors | ||
3 | * | ||
4 | * This file is part of firejail project | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or modify | ||
7 | * it under the terms of the GNU General Public License as published by | ||
8 | * the Free Software Foundation; either version 2 of the License, or | ||
9 | * (at your option) any later version. | ||
10 | * | ||
11 | * This program is distributed in the hope that it will be useful, | ||
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
14 | * GNU General Public License for more details. | ||
15 | * | ||
16 | * You should have received a copy of the GNU General Public License along | ||
17 | * with this program; if not, write to the Free Software Foundation, Inc., | ||
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
19 | */ | ||
20 | #include "fnet.h" | ||
21 | |||
22 | static void usage(void) { | ||
23 | printf("Usage:\n"); | ||
24 | printf("\tfnet create veth dev1 dev2 bridge child\n"); | ||
25 | printf("\tfnet create macvlan dev parent child\n"); | ||
26 | printf("\tfnet moveif dev proc\n"); | ||
27 | } | ||
28 | |||
29 | int main(int argc, char **argv) { | ||
30 | #if 0 | ||
31 | { | ||
32 | system("cat /proc/self/status"); | ||
33 | int i; | ||
34 | for (i = 0; i < argc; i++) | ||
35 | printf("*%s* ", argv[i]); | ||
36 | printf("\n"); | ||
37 | } | ||
38 | #endif | ||
39 | if (argc < 2) | ||
40 | return 1; | ||
41 | |||
42 | |||
43 | |||
44 | if (strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") ==0) { | ||
45 | usage(); | ||
46 | return 0; | ||
47 | } | ||
48 | else if (argc == 7 && strcmp(argv[1], "create") == 0 && strcmp(argv[2], "veth") == 0) { | ||
49 | // create veth pair and move one end in the the namespace | ||
50 | net_create_veth(argv[3], argv[4], atoi(argv[6])); | ||
51 | |||
52 | // connect the ohter veth end to the bridge ... | ||
53 | net_bridge_add_interface(argv[5], argv[3]); | ||
54 | |||
55 | // ... and bring it up | ||
56 | net_if_up(argv[3]); | ||
57 | } | ||
58 | else if (argc == 6 && strcmp(argv[1], "create") == 0 && strcmp(argv[2], "macvlan") == 0) { | ||
59 | net_create_macvlan(argv[3], argv[4], atoi(argv[5])); | ||
60 | } | ||
61 | else if (argc == 4 && strcmp(argv[1], "moveif") == 0) { | ||
62 | net_move_interface(argv[2], atoi(argv[3])); | ||
63 | } | ||
64 | else { | ||
65 | fprintf(stderr, "Error fnet: invalid arguments\n"); | ||
66 | return 1; | ||
67 | } | ||
68 | |||
69 | return 0; | ||
70 | } | ||
diff --git a/src/fnet/veth.c b/src/fnet/veth.c new file mode 100644 index 000000000..d06bc9256 --- /dev/null +++ b/src/fnet/veth.c | |||
@@ -0,0 +1,230 @@ | |||
1 | /* code based on iproute2 ip/iplink.c, modified to be included in firejail project | ||
2 | * | ||
3 | * Original source code: | ||
4 | * | ||
5 | * Information: | ||
6 | * http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2 | ||
7 | * | ||
8 | * Download: | ||
9 | * http://www.kernel.org/pub/linux/utils/net/iproute2/ | ||
10 | * | ||
11 | * Repository: | ||
12 | * git://git.kernel.org/pub/scm/linux/kernel/git/shemminger/iproute2.git | ||
13 | * | ||
14 | * License: GPL v2 | ||
15 | * | ||
16 | * Original copyright header | ||
17 | * | ||
18 | * iplink.c "ip link". | ||
19 | * | ||
20 | * This program is free software; you can redistribute it and/or | ||
21 | * modify it under the terms of the GNU General Public License | ||
22 | * as published by the Free Software Foundation; either version | ||
23 | * 2 of the License, or (at your option) any later version. | ||
24 | * | ||
25 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | ||
26 | * | ||
27 | */ | ||
28 | /* | ||
29 | * Copyright (C) 2014-2016 Firejail Authors | ||
30 | * | ||
31 | * This file is part of firejail project | ||
32 | * | ||
33 | * This program is free software; you can redistribute it and/or modify | ||
34 | * it under the terms of the GNU General Public License as published by | ||
35 | * the Free Software Foundation; either version 2 of the License, or | ||
36 | * (at your option) any later version. | ||
37 | * | ||
38 | * This program is distributed in the hope that it will be useful, | ||
39 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
40 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
41 | * GNU General Public License for more details. | ||
42 | * | ||
43 | * You should have received a copy of the GNU General Public License along | ||
44 | * with this program; if not, write to the Free Software Foundation, Inc., | ||
45 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
46 | */ | ||
47 | |||
48 | #include "fnet.h" | ||
49 | #include "../include/libnetlink.h" | ||
50 | #include <linux/veth.h> | ||
51 | #include <net/if.h> | ||
52 | |||
53 | struct iplink_req | ||
54 | { | ||
55 | struct nlmsghdr n; | ||
56 | struct ifinfomsg i; | ||
57 | char buf[1024]; | ||
58 | }; | ||
59 | |||
60 | static struct rtnl_handle rth = { .fd = -1 }; | ||
61 | |||
62 | int net_create_veth(const char *dev, const char *nsdev, unsigned pid) { | ||
63 | int len; | ||
64 | struct iplink_req req; | ||
65 | |||
66 | assert(dev); | ||
67 | assert(nsdev); | ||
68 | assert(pid); | ||
69 | |||
70 | if (rtnl_open(&rth, 0) < 0) { | ||
71 | fprintf(stderr, "cannot open netlink\n"); | ||
72 | exit(1); | ||
73 | } | ||
74 | |||
75 | memset(&req, 0, sizeof(req)); | ||
76 | |||
77 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); | ||
78 | req.n.nlmsg_flags = NLM_F_REQUEST|NLM_F_CREATE|NLM_F_EXCL; | ||
79 | req.n.nlmsg_type = RTM_NEWLINK; | ||
80 | req.i.ifi_family = 0; | ||
81 | |||
82 | if (dev) { | ||
83 | len = strlen(dev) + 1; | ||
84 | addattr_l(&req.n, sizeof(req), IFLA_IFNAME, dev, len); | ||
85 | } | ||
86 | |||
87 | struct rtattr *linkinfo = NLMSG_TAIL(&req.n); | ||
88 | addattr_l(&req.n, sizeof(req), IFLA_LINKINFO, NULL, 0); | ||
89 | addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, "veth", strlen("veth")); | ||
90 | |||
91 | struct rtattr * data = NLMSG_TAIL(&req.n); | ||
92 | addattr_l(&req.n, sizeof(req), IFLA_INFO_DATA, NULL, 0); | ||
93 | |||
94 | struct rtattr * peerdata = NLMSG_TAIL(&req.n); | ||
95 | addattr_l (&req.n, sizeof(req), VETH_INFO_PEER, NULL, 0); | ||
96 | req.n.nlmsg_len += sizeof(struct ifinfomsg); | ||
97 | |||
98 | // place the link in the child namespace | ||
99 | addattr_l (&req.n, sizeof(req), IFLA_NET_NS_PID, &pid, 4); | ||
100 | |||
101 | if (nsdev) { | ||
102 | int len = strlen(nsdev) + 1; | ||
103 | addattr_l(&req.n, sizeof(req), IFLA_IFNAME, nsdev, len); | ||
104 | } | ||
105 | peerdata->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)peerdata; | ||
106 | |||
107 | data->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)data; | ||
108 | linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo; | ||
109 | |||
110 | // send message | ||
111 | if (rtnl_talk(&rth, &req.n, 0, 0, NULL) < 0) | ||
112 | exit(2); | ||
113 | |||
114 | return 0; | ||
115 | } | ||
116 | |||
117 | |||
118 | int net_create_macvlan(const char *dev, const char *parent, unsigned pid) { | ||
119 | int len; | ||
120 | struct iplink_req req; | ||
121 | assert(dev); | ||
122 | assert(parent); | ||
123 | |||
124 | if (rtnl_open(&rth, 0) < 0) { | ||
125 | fprintf(stderr, "cannot open netlink\n"); | ||
126 | exit(1); | ||
127 | } | ||
128 | |||
129 | memset(&req, 0, sizeof(req)); | ||
130 | |||
131 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); | ||
132 | req.n.nlmsg_flags = NLM_F_REQUEST|NLM_F_CREATE|NLM_F_EXCL; | ||
133 | req.n.nlmsg_type = RTM_NEWLINK; | ||
134 | req.i.ifi_family = 0; | ||
135 | |||
136 | // find parent ifindex | ||
137 | int parent_ifindex = if_nametoindex(parent); | ||
138 | if (parent_ifindex <= 0) { | ||
139 | fprintf(stderr, "Error: cannot find network device %s\n", parent); | ||
140 | exit(1); | ||
141 | } | ||
142 | |||
143 | // add parent | ||
144 | addattr_l(&req.n, sizeof(req), IFLA_LINK, &parent_ifindex, 4); | ||
145 | |||
146 | // add new interface name | ||
147 | len = strlen(dev) + 1; | ||
148 | addattr_l(&req.n, sizeof(req), IFLA_IFNAME, dev, len); | ||
149 | |||
150 | // place the interface in child namespace | ||
151 | addattr_l (&req.n, sizeof(req), IFLA_NET_NS_PID, &pid, 4); | ||
152 | |||
153 | |||
154 | // add link info for the new interface | ||
155 | struct rtattr *linkinfo = NLMSG_TAIL(&req.n); | ||
156 | addattr_l(&req.n, sizeof(req), IFLA_LINKINFO, NULL, 0); | ||
157 | addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, "macvlan", strlen("macvlan")); | ||
158 | |||
159 | // set macvlan bridge mode | ||
160 | struct rtattr * data = NLMSG_TAIL(&req.n); | ||
161 | addattr_l(&req.n, sizeof(req), IFLA_INFO_DATA, NULL, 0); | ||
162 | int macvlan_type = MACVLAN_MODE_BRIDGE; | ||
163 | addattr_l (&req.n, sizeof(req), IFLA_INFO_KIND, &macvlan_type, 4); | ||
164 | |||
165 | data->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)data; | ||
166 | // req.n.nlmsg_len += sizeof(struct ifinfomsg); | ||
167 | |||
168 | |||
169 | data->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)data; | ||
170 | linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo; | ||
171 | |||
172 | // send message | ||
173 | if (rtnl_talk(&rth, &req.n, 0, 0, NULL) < 0) | ||
174 | exit(2); | ||
175 | |||
176 | return 0; | ||
177 | } | ||
178 | |||
179 | // move the interface dev in namespace of program pid | ||
180 | // when the interface is moved, netlink does not preserve interface configuration | ||
181 | int net_move_interface(const char *dev, unsigned pid) { | ||
182 | struct iplink_req req; | ||
183 | assert(dev); | ||
184 | |||
185 | if (rtnl_open(&rth, 0) < 0) { | ||
186 | fprintf(stderr, "cannot open netlink\n"); | ||
187 | exit(1); | ||
188 | } | ||
189 | |||
190 | memset(&req, 0, sizeof(req)); | ||
191 | |||
192 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); | ||
193 | req.n.nlmsg_flags = NLM_F_REQUEST; | ||
194 | req.n.nlmsg_type = RTM_NEWLINK; | ||
195 | req.i.ifi_family = 0; | ||
196 | |||
197 | // find ifindex | ||
198 | int ifindex = if_nametoindex(dev); | ||
199 | if (ifindex <= 0) { | ||
200 | fprintf(stderr, "Error: cannot find interface %s\n", dev); | ||
201 | exit(1); | ||
202 | } | ||
203 | req.i.ifi_index = ifindex; | ||
204 | |||
205 | // place the interface in child namespace | ||
206 | addattr_l (&req.n, sizeof(req), IFLA_NET_NS_PID, &pid, 4); | ||
207 | |||
208 | // send message | ||
209 | if (rtnl_talk(&rth, &req.n, 0, 0, NULL) < 0) | ||
210 | exit(2); | ||
211 | |||
212 | return 0; | ||
213 | } | ||
214 | |||
215 | /* | ||
216 | int main(int argc, char **argv) { | ||
217 | printf("Hello\n"); | ||
218 | |||
219 | |||
220 | char *dev = argv[3]; | ||
221 | char *nsdev = argv[8]; | ||
222 | unsigned pid; | ||
223 | sscanf(argv[10], "%u", &pid); | ||
224 | |||
225 | |||
226 | net_create_veth(dev, nsdev, pid); | ||
227 | |||
228 | return 0; | ||
229 | } | ||
230 | */ \ No newline at end of file | ||