/* * lsfd-sock-xinfo.c - read various information from files under /proc/net/ * * Copyright (C) 2022 Red Hat, Inc. All rights reserved. * Written by Masatake YAMATO * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it would be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include /* inet_ntop */ #include /* in6_addr */ #include /* open(2) */ #include /* getifaddrs */ #include /* SCNu16 */ #include /* if_nametoindex */ #include /* ETH_P_* */ #include /* SS_* */ #include /* NETLINK_* */ #include /* UNIX_PATH_MAX */ #include /* for setns(2) */ #include #include #include #include /* SOCK_* */ #include "xalloc.h" #include "nls.h" #include "libsmartcols.h" #include "sysfs.h" #include "bitops.h" #include "lsfd.h" #include "lsfd-sock.h" static void load_xinfo_from_proc_icmp(ino_t netns_inode); static void load_xinfo_from_proc_icmp6(ino_t netns_inode); static void load_xinfo_from_proc_unix(ino_t netns_inode); static void load_xinfo_from_proc_raw(ino_t netns_inode); static void load_xinfo_from_proc_tcp(ino_t netns_inode); static void load_xinfo_from_proc_udp(ino_t netns_inode); static void load_xinfo_from_proc_udplite(ino_t netns_inode); static void load_xinfo_from_proc_tcp6(ino_t netns_inode); static void load_xinfo_from_proc_udp6(ino_t netns_inode); static void load_xinfo_from_proc_udplite6(ino_t netns_inode); static void load_xinfo_from_proc_raw6(ino_t netns_inode); static void load_xinfo_from_proc_netlink(ino_t netns_inode); static void load_xinfo_from_proc_packet(ino_t netns_inode); static int self_netns_fd = -1; static struct stat self_netns_sb; static void *xinfo_tree; /* for tsearch/tfind */ static void *netns_tree; struct iface { unsigned int index; char name[IF_NAMESIZE]; }; static const char *get_iface_name(ino_t netns, unsigned int iface_index); struct netns { ino_t inode; struct iface *ifaces; }; static int netns_compare(const void *a, const void *b) { const struct netns *netns_a = a; const struct netns *netns_b = b; return netns_a->inode - netns_b->inode; } static void netns_free(void *netns) { struct netns *nsobj = netns; free(nsobj->ifaces); free(netns); } /* * iface index -> iface name mappings */ static void load_ifaces_from_getifaddrs(struct netns *nsobj) { struct ifaddrs *ifa_list; struct ifaddrs *ifa; size_t i, count = 0; if (getifaddrs(&ifa_list) < 0) return; for (ifa = ifa_list; ifa != NULL; ifa = ifa->ifa_next) count++; nsobj->ifaces = xcalloc(count + 1, sizeof(*nsobj->ifaces)); for (ifa = ifa_list, i = 0; ifa != NULL; ifa = ifa->ifa_next, i++) { unsigned int if_index = if_nametoindex(ifa->ifa_name); nsobj->ifaces[i].index = if_index; strncpy(nsobj->ifaces[i].name, ifa->ifa_name, IF_NAMESIZE - 1); /* The slot for the last byte is already filled by calloc. */ } /* nsobj->ifaces[count] is the sentinel value. */ freeifaddrs(ifa_list); return; } static const char *get_iface_name(ino_t netns, unsigned int iface_index) { struct netns key = { .inode = netns }; struct netns **nsobj = tfind(&key, &netns_tree, netns_compare); if (!nsobj) return NULL; for (size_t i = 0; (*nsobj)->ifaces[i].index; i++) { if ((*nsobj)->ifaces[i].index == iface_index) return (*nsobj)->ifaces[i].name; } return NULL; } static bool is_sock_xinfo_loaded(ino_t netns) { struct netns key = { .inode = netns }; return tfind(&key, &netns_tree, netns_compare)? true: false; } static struct netns *mark_sock_xinfo_loaded(ino_t ino) { struct netns *netns = xcalloc(1, sizeof(*netns)); ino_t **tmp; netns->inode = ino; tmp = tsearch(netns, &netns_tree, netns_compare); if (tmp == NULL) errx(EXIT_FAILURE, _("failed to allocate memory")); return *(struct netns **)tmp; } static void load_sock_xinfo_no_nsswitch(struct netns *nsobj) { ino_t netns = nsobj? nsobj->inode: 0; load_xinfo_from_proc_unix(netns); load_xinfo_from_proc_tcp(netns); load_xinfo_from_proc_udp(netns); load_xinfo_from_proc_udplite(netns); load_xinfo_from_proc_raw(netns); load_xinfo_from_proc_tcp6(netns); load_xinfo_from_proc_udp6(netns); load_xinfo_from_proc_udplite6(netns); load_xinfo_from_proc_raw6(netns); load_xinfo_from_proc_icmp(netns); load_xinfo_from_proc_icmp6(netns); load_xinfo_from_proc_netlink(netns); load_xinfo_from_proc_packet(netns); if (nsobj) load_ifaces_from_getifaddrs(nsobj); } static void load_sock_xinfo_with_fd(int fd, struct netns *nsobj) { if (setns(fd, CLONE_NEWNET) == 0) { load_sock_xinfo_no_nsswitch(nsobj); setns(self_netns_fd, CLONE_NEWNET); } } void load_sock_xinfo(struct path_cxt *pc, const char *name, ino_t netns) { if (self_netns_fd == -1) return; if (!is_sock_xinfo_loaded(netns)) { int fd; struct netns *nsobj = mark_sock_xinfo_loaded(netns); fd = ul_path_open(pc, O_RDONLY, name); if (fd < 0) return; load_sock_xinfo_with_fd(fd, nsobj); close(fd); } } void initialize_sock_xinfos(void) { struct path_cxt *pc; DIR *dir; struct dirent *d; self_netns_fd = open("/proc/self/ns/net", O_RDONLY); if (self_netns_fd < 0) load_sock_xinfo_no_nsswitch(NULL); else { if (fstat(self_netns_fd, &self_netns_sb) == 0) { struct netns *nsobj = mark_sock_xinfo_loaded(self_netns_sb.st_ino); load_sock_xinfo_no_nsswitch(nsobj); } } /* Load /proc/net/{unix,...} of the network namespace * specified with netns files under /var/run/netns/. * * `ip netns' command pins a network namespace on * /var/run/netns. */ pc = ul_new_path("/var/run/netns"); if (!pc) err(EXIT_FAILURE, _("failed to alloc path context for /var/run/netns")); dir = ul_path_opendir(pc, NULL); if (dir == NULL) { ul_unref_path(pc); return; } while ((d = readdir(dir))) { struct stat sb; int fd; struct netns *nsobj; if (ul_path_stat(pc, &sb, 0, d->d_name) < 0) continue; if (is_sock_xinfo_loaded(sb.st_ino)) continue; nsobj = mark_sock_xinfo_loaded(sb.st_ino); fd = ul_path_open(pc, O_RDONLY, d->d_name); if (fd < 0) continue; load_sock_xinfo_with_fd(fd, nsobj); close(fd); } closedir(dir); ul_unref_path(pc); } static void free_sock_xinfo(void *node) { struct sock_xinfo *xinfo = node; if (xinfo->class->free) xinfo->class->free(xinfo); free(node); } void finalize_sock_xinfos(void) { if (self_netns_fd != -1) close(self_netns_fd); tdestroy(netns_tree, netns_free); tdestroy(xinfo_tree, free_sock_xinfo); } static int xinfo_compare(const void *a, const void *b) { return ((struct sock_xinfo *)a)->inode - ((struct sock_xinfo *)b)->inode; } static void add_sock_info(struct sock_xinfo *xinfo) { struct sock_xinfo **tmp = tsearch(xinfo, &xinfo_tree, xinfo_compare); if (tmp == NULL) errx(EXIT_FAILURE, _("failed to allocate memory")); } struct sock_xinfo *get_sock_xinfo(ino_t netns_inode) { struct sock_xinfo key = { .inode = netns_inode }; struct sock_xinfo **xinfo = tfind(&key, &xinfo_tree, xinfo_compare); if (xinfo) return *xinfo; return NULL; } bool is_nsfs_dev(dev_t dev) { return dev == self_netns_sb.st_dev; } static const char *sock_decode_type(uint16_t type) { switch (type) { case SOCK_STREAM: return "stream"; case SOCK_DGRAM: return "dgram"; case SOCK_RAW: return "raw"; case SOCK_RDM: return "rdm"; case SOCK_SEQPACKET: return "seqpacket"; case SOCK_DCCP: return "dccp"; case SOCK_PACKET: return "packet"; default: return "unknown"; } } /* * Protocol specific code */ /* * UNIX */ struct unix_xinfo { struct sock_xinfo sock; int acceptcon; /* flags */ uint16_t type; uint8_t st; char path[ UNIX_PATH_MAX + 1 /* for @ */ + 1 /* \0? */ ]; }; static const char *unix_decode_state(uint8_t st) { switch (st) { case SS_FREE: return "free"; case SS_UNCONNECTED: return "unconnected"; case SS_CONNECTING: return "connecting"; case SS_CONNECTED: return "connected"; case SS_DISCONNECTING: return "disconnecting"; default: return "unknown"; } } static char *unix_get_name(struct sock_xinfo *sock_xinfo, struct sock *sock) { struct unix_xinfo *ux = (struct unix_xinfo *)sock_xinfo; const char *state = unix_decode_state(ux->st); char *str = NULL; if (sock->protoname && (strcmp(sock->protoname, "UNIX-STREAM") == 0)) xasprintf(&str, "state=%s%s%s", (ux->acceptcon)? "listen": state, *(ux->path)? " path=": "", *(ux->path)? ux->path: ""); else xasprintf(&str, "state=%s%s%s type=%s", (ux->acceptcon)? "listen": state, *(ux->path)? " path=": "", *(ux->path)? ux->path: "", sock_decode_type(ux->type)); return str; } static char *unix_get_type(struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__))) { const char *str; struct unix_xinfo *ux = (struct unix_xinfo *)sock_xinfo; str = sock_decode_type(ux->type); return xstrdup(str); } static char *unix_get_state(struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__))) { const char *str; struct unix_xinfo *ux = (struct unix_xinfo *)sock_xinfo; if (ux->acceptcon) return xstrdup("listen"); str = unix_decode_state(ux->st); return xstrdup(str); } static bool unix_get_listening(struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__))) { struct unix_xinfo *ux = (struct unix_xinfo *)sock_xinfo; return ux->acceptcon; } static bool unix_fill_column(struct proc *proc __attribute__((__unused__)), struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__)), struct libscols_line *ln __attribute__((__unused__)), int column_id, size_t column_index __attribute__((__unused__)), char **str) { struct unix_xinfo *ux = (struct unix_xinfo *)sock_xinfo; switch (column_id) { case COL_UNIX_PATH: if (*ux->path) { *str = xstrdup(ux->path); return true; } break; } return false; } static const struct sock_xinfo_class unix_xinfo_class = { .get_name = unix_get_name, .get_type = unix_get_type, .get_state = unix_get_state, .get_listening = unix_get_listening, .fill_column = unix_fill_column, .free = NULL, }; /* UNIX_LINE_LEN need at least 54 + 21 + UNIX_PATH_MAX + 1. * * An actual number must be used in this definition * since UNIX_LINE_LEN is specified as an argument for * stringify_value(). */ #define UNIX_LINE_LEN 256 static void load_xinfo_from_proc_unix(ino_t netns_inode) { char line[UNIX_LINE_LEN]; FILE *unix_fp; unix_fp = fopen("/proc/net/unix", "r"); if (!unix_fp) return; if (fgets(line, sizeof(line), unix_fp) == NULL) goto out; if (!(line[0] == 'N' && line[1] == 'u' && line[2] == 'm')) /* Unexpected line */ goto out; while (fgets(line, sizeof(line), unix_fp)) { uint64_t flags; uint32_t type; unsigned int st; unsigned long inode; struct unix_xinfo *ux; char path[UNIX_LINE_LEN + 1] = { 0 }; if (sscanf(line, "%*x: %*x %*x %" SCNx64 " %x %x %lu %" stringify_value(UNIX_LINE_LEN) "[^\n]", &flags, &type, &st, &inode, path) < 4) continue; if (inode == 0) continue; ux = xcalloc(1, sizeof(*ux)); ux->sock.class = &unix_xinfo_class; ux->sock.inode = (ino_t)inode; ux->sock.netns_inode = netns_inode; ux->acceptcon = !!flags; ux->type = type; ux->st = st; xstrncpy(ux->path, path, sizeof(ux->path)); add_sock_info(&ux->sock); } out: fclose(unix_fp); } /* * AF_INET */ struct inet_xinfo { struct sock_xinfo sock; struct in_addr local_addr; struct in_addr remote_addr; }; static uint32_t kernel32_to_cpu(enum sysfs_byteorder byteorder, uint32_t v) { if (byteorder == SYSFS_BYTEORDER_LITTLE) return le32_to_cpu(v); else return be32_to_cpu(v); } /* * AF_INET6 */ struct inet6_xinfo { struct sock_xinfo sock; struct in6_addr local_addr; struct in6_addr remote_addr; }; /* * L4 abstract-layer for protocols stacked on IP and IP6. */ enum l4_state { /* * Taken from linux/include/net/tcp_states.h. * (GPL-2.0-or-later) * * UDP and RAW sockets also uses the contents in Linux. */ TCP_ESTABLISHED = 1, TCP_SYN_SENT, TCP_SYN_RECV, TCP_FIN_WAIT1, TCP_FIN_WAIT2, TCP_TIME_WAIT, TCP_CLOSE, TCP_CLOSE_WAIT, TCP_LAST_ACK, TCP_LISTEN, TCP_CLOSING, TCP_NEW_SYN_RECV, TCP_MAX_STATES /* Leave at the end! */ }; static const char *l4_decode_state(enum l4_state st) { const char * table [] = { [TCP_ESTABLISHED] = "established", [TCP_SYN_SENT] = "syn-sent", [TCP_SYN_RECV] = "syn-recv", [TCP_FIN_WAIT1] = "fin-wait1", [TCP_FIN_WAIT2] = "fin-wait2", [TCP_TIME_WAIT] = "time-wait", [TCP_CLOSE] = "close", [TCP_CLOSE_WAIT] = "close-wait", [TCP_LAST_ACK] = "last-ack", [TCP_LISTEN] = "listen", [TCP_CLOSING] = "closing", [TCP_NEW_SYN_RECV] = "new-syn-recv", }; if (st < TCP_MAX_STATES) return table[st]; return "unknown"; } struct l4_xinfo { union { struct inet_xinfo inet; struct inet6_xinfo inet6; }; enum l4_state st; }; enum l4_side { L4_LOCAL, L4_REMOTE }; enum l3_decorator { L3_DECO_START, L3_DECO_END }; struct l4_xinfo_class { struct sock_xinfo_class sock; struct sock_xinfo *(*scan_line)(const struct sock_xinfo_class *, char *, ino_t, enum sysfs_byteorder); void * (*get_addr)(struct l4_xinfo *, enum l4_side); bool (*is_any_addr)(void *); int family; const char *l3_decorator[2]; }; #define l3_fill_column_handler(L3, SOCK_XINFO, COLUMN_ID, STR) __extension__ \ ({ \ struct l4_xinfo_class *class = (struct l4_xinfo_class *)SOCK_XINFO->class; \ struct l4_xinfo *l4 = (struct l4_xinfo *)SOCK_XINFO; \ void *n = NULL; \ char s[BUFSIZ]; \ bool r = false; \ \ switch (COLUMN_ID) { \ case COL_##L3##_LADDR: \ n = class->get_addr(l4, L4_LOCAL); \ break; \ case COL_##L3##_RADDR: \ n = class->get_addr(l4, L4_REMOTE); \ break; \ default: \ break; \ } \ \ if (n && inet_ntop(class->family, n, s, sizeof(s))) { \ *STR = xstrdup(s); \ r = true; \ } \ r; \ }) /* * TCP */ struct tcp_xinfo { struct l4_xinfo l4; uint16_t local_port; uint16_t remote_port; }; static char *tcp_get_name(struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__))) { char *str = NULL; struct tcp_xinfo *tcp = ((struct tcp_xinfo *)sock_xinfo); struct l4_xinfo *l4 = &tcp->l4; const char *st_str = l4_decode_state(l4->st); struct l4_xinfo_class *class = (struct l4_xinfo_class *)sock_xinfo->class; void *laddr = class->get_addr(l4, L4_LOCAL); void *raddr = class->get_addr(l4, L4_REMOTE); char local_s[BUFSIZ]; char remote_s[BUFSIZ]; const char *start = class->l3_decorator[L3_DECO_START]; const char *end = class->l3_decorator[L3_DECO_END]; if (!inet_ntop(class->family, laddr, local_s, sizeof(local_s))) xasprintf(&str, "state=%s", st_str); else if (l4->st == TCP_LISTEN || !inet_ntop(class->family, raddr, remote_s, sizeof(remote_s))) xasprintf(&str, "state=%s laddr=%s%s%s:%"PRIu16, st_str, start, local_s, end, tcp->local_port); else xasprintf(&str, "state=%s laddr=%s%s%s:%"PRIu16" raddr=%s%s%s:%"PRIu16, st_str, start, local_s, end, tcp->local_port, start, remote_s, end, tcp->remote_port); return str; } static char *tcp_get_type(struct sock_xinfo *sock_xinfo __attribute__((__unused__)), struct sock *sock __attribute__((__unused__))) { return xstrdup("stream"); } static char *tcp_get_state(struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__))) { return xstrdup(l4_decode_state(((struct l4_xinfo *)sock_xinfo)->st)); } static bool tcp_get_listening(struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__))) { return ((struct l4_xinfo *)sock_xinfo)->st == TCP_LISTEN; } #define l4_fill_column_handler(L4, SOCK_XINFO, COLUMN_ID, STR) __extension__ \ ({ \ struct l4_xinfo_class *class = (struct l4_xinfo_class *)SOCK_XINFO->class; \ struct tcp_xinfo *tcp = (struct tcp_xinfo *)SOCK_XINFO; \ struct l4_xinfo *l4 = &tcp->l4; \ void *n = NULL; \ bool has_laddr = false; \ unsigned short p; \ bool has_lport = false; \ char s[BUFSIZ]; \ bool r = true; \ \ switch (COLUMN_ID) { \ case COL_##L4##_LADDR: \ n = class->get_addr(l4, L4_LOCAL); \ has_laddr = true; \ p = tcp->local_port; \ /* FALL THROUGH */ \ case COL_##L4##_RADDR: \ if (!has_laddr) { \ n = class->get_addr(l4, L4_REMOTE); \ p = tcp->remote_port; \ } \ if (n && inet_ntop(class->family, n, s, sizeof(s))) \ xasprintf(STR, "%s%s%s:%"PRIu16, \ class->l3_decorator[L3_DECO_START], \ s, \ class->l3_decorator[L3_DECO_END], \ p); \ break; \ case COL_##L4##_LPORT: \ p = tcp->local_port; \ has_lport = true; \ /* FALL THROUGH */ \ case COL_##L4##_RPORT: \ if (!has_lport) \ p = tcp->remote_port; \ xasprintf(STR, "%"PRIu16, p); \ break; \ default: \ r = false; \ break; \ } \ r; \ }) static struct sock_xinfo *tcp_xinfo_scan_line(const struct sock_xinfo_class *class, char * line, ino_t netns_inode, enum sysfs_byteorder byteorder) { unsigned long local_addr; unsigned long local_port; unsigned long remote_addr; unsigned long remote_port; unsigned long st; unsigned long long inode; struct tcp_xinfo *tcp; struct inet_xinfo *inet; struct sock_xinfo *sock; if (sscanf(line, "%*d: %lx:%lx %lx:%lx %lx %*x:%*x %*x:%*x %*x %*u %*u %lld", &local_addr, &local_port, &remote_addr, &remote_port, &st, &inode) != 6) return NULL; if (inode == 0) return NULL; tcp = xcalloc(1, sizeof(*tcp)); inet = &tcp->l4.inet; sock = &inet->sock; sock->class = class; sock->inode = (ino_t)inode; sock->netns_inode = netns_inode; inet->local_addr.s_addr = kernel32_to_cpu(byteorder, local_addr); tcp->local_port = local_port; inet->remote_addr.s_addr = kernel32_to_cpu(byteorder, remote_addr); tcp->remote_port = remote_port; tcp->l4.st = st; return sock; } static void *tcp_xinfo_get_addr(struct l4_xinfo *l4, enum l4_side side) { return (side == L4_LOCAL) ? &l4->inet.local_addr : &l4->inet.remote_addr; } static bool tcp_xinfo_is_any_addr(void *addr) { return ((struct in_addr *)addr)->s_addr == INADDR_ANY; } static bool tcp_fill_column(struct proc *proc __attribute__((__unused__)), struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__)), struct libscols_line *ln __attribute__((__unused__)), int column_id, size_t column_index __attribute__((__unused__)), char **str) { return l3_fill_column_handler(INET, sock_xinfo, column_id, str) || l4_fill_column_handler(TCP, sock_xinfo, column_id, str); } static const struct l4_xinfo_class tcp_xinfo_class = { .sock = { .get_name = tcp_get_name, .get_type = tcp_get_type, .get_state = tcp_get_state, .get_listening = tcp_get_listening, .fill_column = tcp_fill_column, .free = NULL, }, .scan_line = tcp_xinfo_scan_line, .get_addr = tcp_xinfo_get_addr, .is_any_addr = tcp_xinfo_is_any_addr, .family = AF_INET, .l3_decorator = {"", ""}, }; static bool L4_verify_initial_line(const char *line) { /* At least we expect two white spaces. */ if (strncmp(line, " ", 2) != 0) return false; line += 2; /* Skip white spaces. */ line = skip_space(line); return strncmp(line, "sl", 2) == 0; } #define TCP_LINE_LEN 256 static void load_xinfo_from_proc_inet_L4(ino_t netns_inode, const char *proc_file, const struct l4_xinfo_class *class) { char line[TCP_LINE_LEN]; FILE *tcp_fp; tcp_fp = fopen(proc_file, "r"); if (!tcp_fp) return; if (fgets(line, sizeof(line), tcp_fp) == NULL) goto out; if (!L4_verify_initial_line(line)) /* Unexpected line */ goto out; enum sysfs_byteorder byteorder = sysfs_get_byteorder(NULL); while (fgets(line, sizeof(line), tcp_fp)) { struct sock_xinfo *sock = class->scan_line(&class->sock, line, netns_inode, byteorder); if (sock) add_sock_info(sock); } out: fclose(tcp_fp); } static void load_xinfo_from_proc_tcp(ino_t netns_inode) { load_xinfo_from_proc_inet_L4(netns_inode, "/proc/net/tcp", &tcp_xinfo_class); } /* * UDP */ static char *udp_get_name(struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__))) { char *str = NULL; struct tcp_xinfo *tcp = ((struct tcp_xinfo *)sock_xinfo); struct l4_xinfo *l4 = &tcp->l4; unsigned int st = l4->st; const char *st_str = l4_decode_state(st); struct l4_xinfo_class *class = (struct l4_xinfo_class *)sock_xinfo->class; void *laddr = class->get_addr(l4, L4_LOCAL); void *raddr = class->get_addr(l4, L4_REMOTE); char local_s[BUFSIZ]; char remote_s[BUFSIZ]; const char *start = class->l3_decorator[L3_DECO_START]; const char *end = class->l3_decorator[L3_DECO_END]; if (!inet_ntop(class->family, laddr, local_s, sizeof(local_s))) xasprintf(&str, "state=%s", st_str); else if ((class->is_any_addr(raddr) && tcp->remote_port == 0) || !inet_ntop(class->family, raddr, remote_s, sizeof(remote_s))) xasprintf(&str, "state=%s laddr=%s%s%s:%"PRIu16, st_str, start, local_s, end, tcp->local_port); else xasprintf(&str, "state=%s laddr=%s%s%s:%"PRIu16" raddr=%s%s%s:%"PRIu16, st_str, start, local_s, end, tcp->local_port, start, remote_s, end, tcp->remote_port); return str; } static char *udp_get_type(struct sock_xinfo *sock_xinfo __attribute__((__unused__)), struct sock *sock __attribute__((__unused__))) { return xstrdup("dgram"); } static bool udp_fill_column(struct proc *proc __attribute__((__unused__)), struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__)), struct libscols_line *ln __attribute__((__unused__)), int column_id, size_t column_index __attribute__((__unused__)), char **str) { return l3_fill_column_handler(INET, sock_xinfo, column_id, str) || l4_fill_column_handler(UDP, sock_xinfo, column_id, str); } static const struct l4_xinfo_class udp_xinfo_class = { .sock = { .get_name = udp_get_name, .get_type = udp_get_type, .get_state = tcp_get_state, .get_listening = NULL, .fill_column = udp_fill_column, .free = NULL, }, .scan_line = tcp_xinfo_scan_line, .get_addr = tcp_xinfo_get_addr, .is_any_addr = tcp_xinfo_is_any_addr, .family = AF_INET, .l3_decorator = {"", ""}, }; static void load_xinfo_from_proc_udp(ino_t netns_inode) { load_xinfo_from_proc_inet_L4(netns_inode, "/proc/net/udp", &udp_xinfo_class); } /* * UDP-Lite */ static bool udplite_fill_column(struct proc *proc __attribute__((__unused__)), struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__)), struct libscols_line *ln __attribute__((__unused__)), int column_id, size_t column_index __attribute__((__unused__)), char **str) { return l3_fill_column_handler(INET, sock_xinfo, column_id, str) || l4_fill_column_handler(UDPLITE, sock_xinfo, column_id, str); } static const struct l4_xinfo_class udplite_xinfo_class = { .sock = { .get_name = udp_get_name, .get_type = udp_get_type, .get_state = tcp_get_state, .get_listening = NULL, .fill_column = udplite_fill_column, .free = NULL, }, .scan_line = tcp_xinfo_scan_line, .get_addr = tcp_xinfo_get_addr, .is_any_addr = tcp_xinfo_is_any_addr, .family = AF_INET, .l3_decorator = {"", ""}, }; static void load_xinfo_from_proc_udplite(ino_t netns_inode) { load_xinfo_from_proc_inet_L4(netns_inode, "/proc/net/udplite", &udplite_xinfo_class); } /* * RAW */ struct raw_xinfo { struct l4_xinfo l4; uint16_t protocol; }; static char *raw_get_name_common(struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__)), const char *port_label) { char *str = NULL; struct l4_xinfo_class *class = (struct l4_xinfo_class *)sock_xinfo->class; struct raw_xinfo *raw = ((struct raw_xinfo *)sock_xinfo); struct l4_xinfo *l4 = &raw->l4; const char *st_str = l4_decode_state(l4->st); void *laddr = class->get_addr(l4, L4_LOCAL); void *raddr = class->get_addr(l4, L4_REMOTE); char local_s[BUFSIZ]; char remote_s[BUFSIZ]; if (!inet_ntop(class->family, laddr, local_s, sizeof(local_s))) xasprintf(&str, "state=%s", st_str); else if (class->is_any_addr(raddr) || !inet_ntop(class->family, raddr, remote_s, sizeof(remote_s))) xasprintf(&str, "state=%s %s=%"PRIu16" laddr=%s", st_str, port_label, raw->protocol, local_s); else xasprintf(&str, "state=%s %s=%"PRIu16" laddr=%s raddr=%s", st_str, port_label, raw->protocol, local_s, remote_s); return str; } static char *raw_get_name(struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__))) { return raw_get_name_common(sock_xinfo, sock, "protocol"); } static char *raw_get_type(struct sock_xinfo *sock_xinfo __attribute__((__unused__)), struct sock *sock __attribute__((__unused__))) { return xstrdup("raw"); } static bool raw_fill_column(struct proc *proc __attribute__((__unused__)), struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__)), struct libscols_line *ln __attribute__((__unused__)), int column_id, size_t column_index __attribute__((__unused__)), char **str) { if (l3_fill_column_handler(INET, sock_xinfo, column_id, str)) return true; if (column_id == COL_RAW_PROTOCOL) { xasprintf(str, "%"PRIu16, ((struct raw_xinfo *)sock_xinfo)->protocol); return true; } return false; } static struct sock_xinfo *raw_xinfo_scan_line(const struct sock_xinfo_class *class, char * line, ino_t netns_inode, enum sysfs_byteorder byteorder) { unsigned long local_addr; unsigned long protocol; unsigned long remote_addr; unsigned long st; unsigned long long inode; struct raw_xinfo *raw; struct inet_xinfo *inet; struct sock_xinfo *sock; if (sscanf(line, "%*d: %lx:%lx %lx:%*x %lx %*x:%*x %*x:%*x %*x %*u %*u %lld", &local_addr, &protocol, &remote_addr, &st, &inode) != 5) return NULL; if (inode == 0) return NULL; raw = xcalloc(1, sizeof(*raw)); inet = &raw->l4.inet; sock = &inet->sock; sock->class = class; sock->inode = (ino_t)inode; sock->netns_inode = netns_inode; inet->local_addr.s_addr = kernel32_to_cpu(byteorder, local_addr); inet->remote_addr.s_addr = kernel32_to_cpu(byteorder, remote_addr); raw->protocol = protocol; raw->l4.st = st; return sock; } static const struct l4_xinfo_class raw_xinfo_class = { .sock = { .get_name = raw_get_name, .get_type = raw_get_type, .get_state = tcp_get_state, .get_listening = NULL, .fill_column = raw_fill_column, .free = NULL, }, .scan_line = raw_xinfo_scan_line, .get_addr = tcp_xinfo_get_addr, .is_any_addr = tcp_xinfo_is_any_addr, .family = AF_INET, .l3_decorator = {"", ""}, }; static void load_xinfo_from_proc_raw(ino_t netns_inode) { load_xinfo_from_proc_inet_L4(netns_inode, "/proc/net/raw", &raw_xinfo_class); } /* * PING */ static char *ping_get_name(struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__))) { return raw_get_name_common(sock_xinfo, sock, "id"); } static char *ping_get_type(struct sock_xinfo *sock_xinfo __attribute__((__unused__)), struct sock *sock __attribute__((__unused__))) { return xstrdup("dgram"); } static bool ping_fill_column(struct proc *proc __attribute__((__unused__)), struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__)), struct libscols_line *ln __attribute__((__unused__)), int column_id, size_t column_index __attribute__((__unused__)), char **str) { if (l3_fill_column_handler(INET, sock_xinfo, column_id, str)) return true; if (column_id == COL_PING_ID) { xasprintf(str, "%"PRIu16, ((struct raw_xinfo *)sock_xinfo)->protocol); return true; } return false; } static const struct l4_xinfo_class ping_xinfo_class = { .sock = { .get_name = ping_get_name, .get_type = ping_get_type, .get_state = tcp_get_state, .get_listening = NULL, .fill_column = ping_fill_column, .free = NULL, }, .scan_line = raw_xinfo_scan_line, .get_addr = tcp_xinfo_get_addr, .is_any_addr = tcp_xinfo_is_any_addr, .family = AF_INET, .l3_decorator = {"", ""}, }; static void load_xinfo_from_proc_icmp(ino_t netns_inode) { load_xinfo_from_proc_inet_L4(netns_inode, "/proc/net/icmp", &ping_xinfo_class); } /* * TCP6 */ static struct sock_xinfo *tcp6_xinfo_scan_line(const struct sock_xinfo_class *class, char * line, ino_t netns_inode, enum sysfs_byteorder byteorder) { uint32_t local_addr[4]; unsigned int local_port; uint32_t remote_addr[4]; unsigned int remote_port; unsigned int st; unsigned long inode; struct tcp_xinfo *tcp; struct inet6_xinfo *inet6; struct sock_xinfo *sock; if (sscanf(line, "%*d: " "%08x%08x%08x%08x:%04x " "%08x%08x%08x%08x:%04x " "%x %*x:%*x %*x:%*x %*x %*u %*d %lu ", local_addr+0, local_addr+1, local_addr+2, local_addr+3, &local_port, remote_addr+0, remote_addr+1, remote_addr+2, remote_addr+3, &remote_port, &st, &inode) != 12) return NULL; if (inode == 0) return NULL; tcp = xmalloc(sizeof(*tcp)); inet6 = &tcp->l4.inet6; sock = &inet6->sock; sock->class = class; sock->inode = (ino_t)inode; sock->netns_inode = netns_inode; tcp->local_port = local_port; for (int i = 0; i < 4; i++) { inet6->local_addr.s6_addr32[i] = kernel32_to_cpu(byteorder, local_addr[i]); inet6->remote_addr.s6_addr32[i] = kernel32_to_cpu(byteorder, remote_addr[i]); } tcp->remote_port = remote_port; tcp->l4.st = st; return sock; } static bool tcp6_fill_column(struct proc *proc __attribute__((__unused__)), struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__)), struct libscols_line *ln __attribute__((__unused__)), int column_id, size_t column_index __attribute__((__unused__)), char **str) { return l3_fill_column_handler(INET6, sock_xinfo, column_id, str) || l4_fill_column_handler(TCP, sock_xinfo, column_id, str); } static void *tcp6_xinfo_get_addr(struct l4_xinfo * l4, enum l4_side side) { return (side == L4_LOCAL) ? &l4->inet6.local_addr : &l4->inet6.remote_addr; } static bool tcp6_xinfo_is_any_addr(void *addr) { return IN6_ARE_ADDR_EQUAL(addr, &(struct in6_addr)IN6ADDR_ANY_INIT); } static const struct l4_xinfo_class tcp6_xinfo_class = { .sock = { .get_name = tcp_get_name, .get_type = tcp_get_type, .get_state = tcp_get_state, .get_listening = tcp_get_listening, .fill_column = tcp6_fill_column, .free = NULL, }, .scan_line = tcp6_xinfo_scan_line, .get_addr = tcp6_xinfo_get_addr, .is_any_addr = tcp6_xinfo_is_any_addr, .family = AF_INET6, .l3_decorator = {"[", "]"}, }; static void load_xinfo_from_proc_tcp6(ino_t netns_inode) { load_xinfo_from_proc_inet_L4(netns_inode, "/proc/net/tcp6", &tcp6_xinfo_class); } /* * UDP6 */ static bool udp6_fill_column(struct proc *proc __attribute__((__unused__)), struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__)), struct libscols_line *ln __attribute__((__unused__)), int column_id, size_t column_index __attribute__((__unused__)), char **str) { return l3_fill_column_handler(INET6, sock_xinfo, column_id, str) || l4_fill_column_handler(UDP, sock_xinfo, column_id, str); } static const struct l4_xinfo_class udp6_xinfo_class = { .sock = { .get_name = udp_get_name, .get_type = udp_get_type, .get_state = tcp_get_state, .get_listening = NULL, .fill_column = udp6_fill_column, .free = NULL, }, .scan_line = tcp6_xinfo_scan_line, .get_addr = tcp6_xinfo_get_addr, .is_any_addr = tcp6_xinfo_is_any_addr, .family = AF_INET6, .l3_decorator = {"[", "]"}, }; static void load_xinfo_from_proc_udp6(ino_t netns_inode) { load_xinfo_from_proc_inet_L4(netns_inode, "/proc/net/udp6", &udp6_xinfo_class); } /* * UDPLITEv6 */ static bool udplite6_fill_column(struct proc *proc __attribute__((__unused__)), struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__)), struct libscols_line *ln __attribute__((__unused__)), int column_id, size_t column_index __attribute__((__unused__)), char **str) { return l3_fill_column_handler(INET6, sock_xinfo, column_id, str) || l4_fill_column_handler(UDPLITE, sock_xinfo, column_id, str); } static const struct l4_xinfo_class udplite6_xinfo_class = { .sock = { .get_name = udp_get_name, .get_type = udp_get_type, .get_state = tcp_get_state, .get_listening = NULL, .fill_column = udplite6_fill_column, .free = NULL, }, .scan_line = tcp6_xinfo_scan_line, .get_addr = tcp6_xinfo_get_addr, .is_any_addr = tcp6_xinfo_is_any_addr, .family = AF_INET6, .l3_decorator = {"[", "]"}, }; static void load_xinfo_from_proc_udplite6(ino_t netns_inode) { load_xinfo_from_proc_inet_L4(netns_inode, "/proc/net/udplite6", &udplite6_xinfo_class); } /* * RAW6 */ static struct sock_xinfo *raw6_xinfo_scan_line(const struct sock_xinfo_class *class, char * line, ino_t netns_inode, enum sysfs_byteorder byteorder) { uint32_t local_addr[4]; unsigned int protocol; uint32_t remote_addr[4]; unsigned int st; unsigned long inode; struct raw_xinfo *raw; struct inet6_xinfo *inet6; struct sock_xinfo *sock; if (sscanf(line, "%*d: " "%08x%08x%08x%08x:%04x " "%08x%08x%08x%08x:0000 " "%x %*x:%*x %*x:%*x %*x %*u %*d %lu ", local_addr+0, local_addr+1, local_addr+2, local_addr+3, &protocol, remote_addr+0, remote_addr+1, remote_addr+2, remote_addr+3, &st, &inode) != 11) return NULL; if (inode == 0) return NULL; raw = xmalloc(sizeof(*raw)); inet6 = &raw->l4.inet6; sock = &inet6->sock; sock->class = class; sock->inode = (ino_t)inode; sock->netns_inode = netns_inode; for (int i = 0; i < 4; i++) { inet6->local_addr.s6_addr32[i] = kernel32_to_cpu(byteorder, local_addr[i]); inet6->remote_addr.s6_addr32[i] = kernel32_to_cpu(byteorder, remote_addr[i]); } raw->protocol = protocol; raw->l4.st = st; return sock; } static bool raw6_fill_column(struct proc *proc __attribute__((__unused__)), struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__)), struct libscols_line *ln __attribute__((__unused__)), int column_id, size_t column_index __attribute__((__unused__)), char **str) { struct raw_xinfo *raw; if (l3_fill_column_handler(INET6, sock_xinfo, column_id, str)) return true; raw = (struct raw_xinfo *)sock_xinfo; if (column_id == COL_RAW_PROTOCOL) { xasprintf(str, "%"PRIu16, raw->protocol); return true; } return false; } static const struct l4_xinfo_class raw6_xinfo_class = { .sock = { .get_name = raw_get_name, .get_type = raw_get_type, .get_state = tcp_get_state, .get_listening = NULL, .fill_column = raw6_fill_column, .free = NULL, }, .scan_line = raw6_xinfo_scan_line, .get_addr = tcp6_xinfo_get_addr, .is_any_addr = tcp6_xinfo_is_any_addr, .family = AF_INET6, .l3_decorator = {"[", "]"}, }; static void load_xinfo_from_proc_raw6(ino_t netns_inode) { load_xinfo_from_proc_inet_L4(netns_inode, "/proc/net/raw6", &raw6_xinfo_class); } /* * PINGv6 */ static bool ping6_fill_column(struct proc *proc __attribute__((__unused__)), struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__)), struct libscols_line *ln __attribute__((__unused__)), int column_id, size_t column_index __attribute__((__unused__)), char **str) { if (l3_fill_column_handler(INET6, sock_xinfo, column_id, str)) return true; if (column_id == COL_PING_ID) { xasprintf(str, "%"PRIu16, ((struct raw_xinfo *)sock_xinfo)->protocol); return true; } return false; } static const struct l4_xinfo_class ping6_xinfo_class = { .sock = { .get_name = ping_get_name, .get_type = ping_get_type, .get_state = tcp_get_state, .get_listening = NULL, .fill_column = ping6_fill_column, .free = NULL, }, .scan_line = raw6_xinfo_scan_line, .get_addr = tcp6_xinfo_get_addr, .is_any_addr = tcp6_xinfo_is_any_addr, .family = AF_INET6, .l3_decorator = {"[", "]"}, }; static void load_xinfo_from_proc_icmp6(ino_t netns_inode) { load_xinfo_from_proc_inet_L4(netns_inode, "/proc/net/icmp6", &ping6_xinfo_class); } /* * NETLINK */ struct netlink_xinfo { struct sock_xinfo sock; uint16_t protocol; uint32_t lportid; /* netlink_diag may provide rportid. */ uint32_t groups; }; static const char *netlink_decode_protocol(uint16_t protocol) { switch (protocol) { case NETLINK_ROUTE: return "route"; case NETLINK_UNUSED: return "unused"; case NETLINK_USERSOCK: return "usersock"; case NETLINK_FIREWALL: return "firewall"; case NETLINK_SOCK_DIAG: return "sock_diag"; case NETLINK_NFLOG: return "nflog"; case NETLINK_XFRM: return "xfrm"; case NETLINK_SELINUX: return "selinux"; case NETLINK_ISCSI: return "iscsi"; case NETLINK_AUDIT: return "audit"; case NETLINK_FIB_LOOKUP: return "fib_lookup"; case NETLINK_CONNECTOR: return "connector"; case NETLINK_NETFILTER: return "netfilter"; case NETLINK_IP6_FW: return "ip6_fw"; case NETLINK_DNRTMSG: return "dnrtmsg"; case NETLINK_KOBJECT_UEVENT: return "kobject_uevent"; case NETLINK_GENERIC: return "generic"; case NETLINK_SCSITRANSPORT: return "scsitransport"; case NETLINK_ECRYPTFS: return "ecryptfs"; case NETLINK_RDMA: return "rdma"; case NETLINK_CRYPTO: return "crypto"; #ifdef NETLINK_SMC case NETLINK_SMC: return "smc"; #endif default: return "unknown"; } } static char *netlink_get_name(struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__))) { struct netlink_xinfo *nl = (struct netlink_xinfo *)sock_xinfo; char *str = NULL; const char *protocol = netlink_decode_protocol(nl->protocol); if (nl->groups) xasprintf(&str, "protocol=%s lport=%"PRIu16 " groups=%"PRIu32, protocol, nl->lportid, nl->groups); else xasprintf(&str, "protocol=%s lport=%"PRIu16, protocol, nl->lportid); return str; } static char *netlink_get_type(struct sock_xinfo *sock_xinfo __attribute__((__unused__)), struct sock *sock __attribute__((__unused__))) { return xstrdup("raw"); } static bool netlink_fill_column(struct proc *proc __attribute__((__unused__)), struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__)), struct libscols_line *ln __attribute__((__unused__)), int column_id, size_t column_index __attribute__((__unused__)), char **str) { struct netlink_xinfo *nl = (struct netlink_xinfo *)sock_xinfo; switch (column_id) { case COL_NETLINK_GROUPS: xasprintf(str, "%"PRIu32, nl->groups); return true; case COL_NETLINK_LPORT: xasprintf(str, "%"PRIu32, nl->lportid); return true; case COL_NETLINK_PROTOCOL: *str = xstrdup(netlink_decode_protocol(nl->protocol)); return true; } return false; } static const struct sock_xinfo_class netlink_xinfo_class = { .get_name = netlink_get_name, .get_type = netlink_get_type, .get_state = NULL, .get_listening = NULL, .fill_column = netlink_fill_column, .free = NULL, }; static void load_xinfo_from_proc_netlink(ino_t netns_inode) { char line[BUFSIZ]; FILE *netlink_fp; netlink_fp = fopen("/proc/net/netlink", "r"); if (!netlink_fp) return; if (fgets(line, sizeof(line), netlink_fp) == NULL) goto out; if (!(line[0] == 's' && line[1] == 'k')) /* Unexpected line */ goto out; while (fgets(line, sizeof(line), netlink_fp)) { uint16_t protocol; uint32_t lportid; uint32_t groups; unsigned long inode; struct netlink_xinfo *nl; if (sscanf(line, "%*x %" SCNu16 " %" SCNu32 " %" SCNx32 " %*d %*d %*d %*d %*u %lu", &protocol, &lportid, &groups, &inode) < 4) continue; if (inode == 0) continue; nl = xcalloc(1, sizeof(*nl)); nl->sock.class = &netlink_xinfo_class; nl->sock.inode = (ino_t)inode; nl->sock.netns_inode = netns_inode; nl->protocol = protocol; nl->lportid = lportid; nl->groups = groups; add_sock_info(&nl->sock); } out: fclose(netlink_fp); } /* * PACKET */ struct packet_xinfo { struct sock_xinfo sock; uint16_t type; uint16_t protocol; unsigned int iface; }; static const char *packet_decode_protocol(uint16_t proto) { switch (proto) { case 0: return NULL; case ETH_P_802_3: return "802_3"; case ETH_P_AX25: return "ax25"; case ETH_P_ALL: return "all"; case ETH_P_802_2: return "802_2"; case ETH_P_SNAP: return "snap"; case ETH_P_DDCMP: return "ddcmp"; case ETH_P_WAN_PPP: return "wan_ppp"; case ETH_P_PPP_MP: return "ppp_mp"; case ETH_P_LOCALTALK: return "localtalk"; case ETH_P_CAN: return "can"; case ETH_P_CANFD: return "canfd"; #ifdef ETH_P_CANXL case ETH_P_CANXL: return "canxl"; #endif case ETH_P_PPPTALK: return "ppptalk"; case ETH_P_TR_802_2: return "tr_802_2"; case ETH_P_MOBITEX: return "mobitex"; case ETH_P_CONTROL: return "control"; case ETH_P_IRDA: return "irda"; case ETH_P_ECONET: return "econet"; case ETH_P_HDLC: return "hdlc"; case ETH_P_ARCNET: return "arcnet"; case ETH_P_DSA: return "dsa"; case ETH_P_TRAILER: return "trailer"; case ETH_P_PHONET: return "phonet"; case ETH_P_IEEE802154: return "ieee802154"; case ETH_P_CAIF: return "caif"; #ifdef ETH_P_XDSA case ETH_P_XDSA: return "xdsa"; #endif #ifdef ETH_P_MAP case ETH_P_MAP: return "map"; #endif #ifdef ETH_P_MCTP case ETH_P_MCTP: return "mctp"; #endif case ETH_P_LOOP: return "loop"; case ETH_P_PUP: return "pup"; case ETH_P_PUPAT: return "pupat"; #ifdef ETH_P_TSN case ETH_P_TSN: return "tsn"; #endif #ifdef ETH_P_ERSPAN2 case ETH_P_ERSPAN2: return "erspan2"; #endif case ETH_P_IP: return "ip"; case ETH_P_X25: return "x25"; case ETH_P_ARP: return "arp"; case ETH_P_BPQ: return "bpq"; case ETH_P_IEEEPUP: return "ieeepup"; case ETH_P_IEEEPUPAT: return "ieeepupat"; case ETH_P_BATMAN: return "batman"; case ETH_P_DEC: return "dec"; case ETH_P_DNA_DL: return "dna_dl"; case ETH_P_DNA_RC: return "dna_rc"; case ETH_P_DNA_RT: return "dna_rt"; case ETH_P_LAT: return "lat"; case ETH_P_DIAG: return "diag"; case ETH_P_CUST: return "cust"; case ETH_P_SCA: return "sca"; case ETH_P_TEB: return "teb"; case ETH_P_RARP: return "rarp"; case ETH_P_ATALK: return "atalk"; case ETH_P_AARP: return "aarp"; case ETH_P_8021Q: return "8021q"; #ifdef ETH_P_ERSPAN case ETH_P_ERSPAN: return "erspan"; #endif case ETH_P_IPX: return "ipx"; case ETH_P_IPV6: return "ipv6"; case ETH_P_PAUSE: return "pause"; case ETH_P_SLOW: return "slow"; case ETH_P_WCCP: return "wccp"; case ETH_P_MPLS_UC: return "mpls_uc"; case ETH_P_MPLS_MC: return "mpls_mc"; case ETH_P_ATMMPOA: return "atmmpoa"; #ifdef ETH_P_PPP_DISC case ETH_P_PPP_DISC: return "ppp_disc"; #endif #ifdef ETH_P_PPP_SES case ETH_P_PPP_SES: return "ppp_ses"; #endif case ETH_P_LINK_CTL: return "link_ctl"; case ETH_P_ATMFATE: return "atmfate"; case ETH_P_PAE: return "pae"; #ifdef ETH_P_PROFINET case ETH_P_PROFINET: return "profinet"; #endif #ifdef ETH_P_REALTEK case ETH_P_REALTEK: return "realtek"; #endif case ETH_P_AOE: return "aoe"; #ifdef ETH_P_ETHERCAT case ETH_P_ETHERCAT: return "ethercat"; #endif case ETH_P_8021AD: return "8021ad"; case ETH_P_802_EX1: return "802_ex1"; #ifdef ETH_P_PREAUTH case ETH_P_PREAUTH: return "preauth"; #endif case ETH_P_TIPC: return "tipc"; #ifdef ETH_P_LLDP case ETH_P_LLDP: return "lldp"; #endif #ifdef ETH_P_MRP case ETH_P_MRP: return "mrp"; #endif #ifdef ETH_P_MACSEC case ETH_P_MACSEC: return "macsec"; #endif case ETH_P_8021AH: return "8021ah"; #ifdef ETH_P_MVRP case ETH_P_MVRP: return "mvrp"; #endif case ETH_P_1588: return "1588"; #ifdef ETH_P_NCSI case ETH_P_NCSI: return "ncsi"; #endif #ifdef ETH_P_PRP case ETH_P_PRP: return "prp"; #endif #ifdef ETH_P_CFM case ETH_P_CFM: return "cfm"; #endif case ETH_P_FCOE: return "fcoe"; #ifdef ETH_P_IBOE case ETH_P_IBOE: return "iboe"; #endif case ETH_P_TDLS: return "tdls"; case ETH_P_FIP: return "fip"; #ifdef ETH_P_80221 case ETH_P_80221: return "80221"; #endif #ifdef ETH_P_HSR case ETH_P_HSR: return "hsr"; #endif #ifdef ETH_P_NSH case ETH_P_NSH: return "nsh"; #endif #ifdef ETH_P_LOOPBACK case ETH_P_LOOPBACK: return "loopback"; #endif case ETH_P_QINQ1: return "qinq1"; case ETH_P_QINQ2: return "qinq2"; case ETH_P_QINQ3: return "qinq3"; case ETH_P_EDSA: return "edsa"; #ifdef ETH_P_DSA_8021Q case ETH_P_DSA_8021Q: return "dsa_8021q"; #endif #ifdef ETH_P_DSA_A5PSW case ETH_P_DSA_A5PSW: return "dsa_a5psw"; #endif #ifdef ETH_P_IFE case ETH_P_IFE: return "ife"; #endif case ETH_P_AF_IUCV: return "af_iucv"; #ifdef ETH_P_802_3_MIN case ETH_P_802_3_MIN: return "802_3_min"; #endif default: return "unknown"; } } static char *packet_get_name(struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__))) { struct packet_xinfo *pkt = (struct packet_xinfo *)sock_xinfo; char *str = NULL; const char *type = sock_decode_type(pkt->type); const char *proto = packet_decode_protocol(pkt->protocol); const char *iface = get_iface_name(sock_xinfo->netns_inode, pkt->iface); if (iface && proto) xasprintf(&str, "type=%s protocol=%s iface=%s", type, proto, iface); else if (proto) xasprintf(&str, "type=%s protocol=%s", type, proto); else if (iface) xasprintf(&str, "type=%s iface=%s", type, iface); else xasprintf(&str, "type=%s", type); return str; } static char *packet_get_type(struct sock_xinfo *sock_xinfo __attribute__((__unused__)), struct sock *sock __attribute__((__unused__))) { const char *str; struct packet_xinfo *pkt = (struct packet_xinfo *)sock_xinfo; str = sock_decode_type(pkt->type); return xstrdup(str); } static bool packet_fill_column(struct proc *proc __attribute__((__unused__)), struct sock_xinfo *sock_xinfo, struct sock *sock __attribute__((__unused__)), struct libscols_line *ln __attribute__((__unused__)), int column_id, size_t column_index __attribute__((__unused__)), char **str) { struct packet_xinfo *pkt = (struct packet_xinfo *)sock_xinfo; switch (column_id) { case COL_PACKET_IFACE: { const char *iface; iface = get_iface_name(sock_xinfo->netns_inode, pkt->iface); if (iface) { *str = xstrdup(iface); return true; } break; } case COL_PACKET_PROTOCOL: { const char *proto; proto = packet_decode_protocol(pkt->protocol); if (proto) { *str = xstrdup(proto); return true; } break; } default: break; } return false; } static const struct sock_xinfo_class packet_xinfo_class = { .get_name = packet_get_name, .get_type = packet_get_type, .get_state = NULL, .get_listening = NULL, .fill_column = packet_fill_column, .free = NULL, }; static void load_xinfo_from_proc_packet(ino_t netns_inode) { char line[BUFSIZ]; FILE *packet_fp; packet_fp = fopen("/proc/net/packet", "r"); if (!packet_fp) return; if (fgets(line, sizeof(line), packet_fp) == NULL) goto out; if (!(line[0] == 's' && line[1] == 'k')) /* Unexpected line */ goto out; while (fgets(line, sizeof(line), packet_fp)) { uint16_t type; uint16_t protocol; unsigned int iface; unsigned long inode; struct packet_xinfo *pkt; if (sscanf(line, "%*x %*d %" SCNu16 " %" SCNu16 " %u %*d %*d %*d %lu", &type, &protocol, &iface, &inode) < 4) continue; pkt = xcalloc(1, sizeof(*pkt)); pkt->sock.class = &packet_xinfo_class; pkt->sock.inode = (ino_t)inode; pkt->sock.netns_inode = netns_inode; pkt->type = type; pkt->protocol = protocol; pkt->iface = iface; add_sock_info(&pkt->sock); } out: fclose(packet_fp); }