| /* vi: set sw=4 ts=4: */ |
| /* |
| * Mini netstat implementation(s) for busybox |
| * based in part on the netstat implementation from net-tools. |
| * |
| * Copyright (C) 2002 by Bart Visscher <magick@linux-fan.com> |
| * |
| * 2002-04-20 |
| * IPV6 support added by Bart Visscher <magick@linux-fan.com> |
| * |
| * 2008-07-10 |
| * optional '-p' flag support ported from net-tools by G. Somlo <somlo@cmu.edu> |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| */ |
| //config:config NETSTAT |
| //config: bool "netstat (10 kb)" |
| //config: default y |
| //config: help |
| //config: netstat prints information about the Linux networking subsystem. |
| //config: |
| //config:config FEATURE_NETSTAT_WIDE |
| //config: bool "Enable wide output" |
| //config: default y |
| //config: depends on NETSTAT |
| //config: help |
| //config: Add support for wide columns. Useful when displaying IPv6 addresses |
| //config: (-W option). |
| //config: |
| //config:config FEATURE_NETSTAT_PRG |
| //config: bool "Enable PID/Program name output" |
| //config: default y |
| //config: depends on NETSTAT |
| //config: help |
| //config: Add support for -p flag to print out PID and program name. |
| //config: +700 bytes of code. |
| |
| //applet:IF_NETSTAT(APPLET(netstat, BB_DIR_BIN, BB_SUID_DROP)) |
| |
| //kbuild:lib-$(CONFIG_NETSTAT) += netstat.o |
| |
| #include "libbb.h" |
| #include "inet_common.h" |
| |
| //usage:#define netstat_trivial_usage |
| //usage: "[-"IF_ROUTE("r")"al] [-tuwx] [-en"IF_FEATURE_NETSTAT_WIDE("W")IF_FEATURE_NETSTAT_PRG("p")"]" |
| //usage:#define netstat_full_usage "\n\n" |
| //usage: "Display networking information\n" |
| //usage: IF_ROUTE( |
| //usage: "\n -r Routing table" |
| //usage: ) |
| //usage: "\n -a All sockets" |
| //usage: "\n -l Listening sockets" |
| //usage: "\n Else: connected sockets" |
| //usage: "\n -t TCP sockets" |
| //usage: "\n -u UDP sockets" |
| //usage: "\n -w Raw sockets" |
| //usage: "\n -x Unix sockets" |
| //usage: "\n Else: all socket types" |
| //usage: "\n -e Other/more information" |
| //usage: "\n -n Don't resolve names" |
| //usage: IF_FEATURE_NETSTAT_WIDE( |
| //usage: "\n -W Wide display" |
| //usage: ) |
| //usage: IF_FEATURE_NETSTAT_PRG( |
| //usage: "\n -p Show PID/program name for sockets" |
| //usage: ) |
| |
| #define NETSTAT_OPTS "laentuwx" \ |
| IF_ROUTE( "r") \ |
| IF_FEATURE_NETSTAT_WIDE("W") \ |
| IF_FEATURE_NETSTAT_PRG( "p") |
| |
| enum { |
| OPT_sock_listen = 1 << 0, // l |
| OPT_sock_all = 1 << 1, // a |
| OPT_extended = 1 << 2, // e |
| OPT_noresolve = 1 << 3, // n |
| OPT_sock_tcp = 1 << 4, // t |
| OPT_sock_udp = 1 << 5, // u |
| OPT_sock_raw = 1 << 6, // w |
| OPT_sock_unix = 1 << 7, // x |
| OPTBIT_x = 7, |
| IF_ROUTE( OPTBIT_ROUTE,) |
| IF_FEATURE_NETSTAT_WIDE(OPTBIT_WIDE ,) |
| IF_FEATURE_NETSTAT_PRG( OPTBIT_PRG ,) |
| OPT_route = IF_ROUTE( (1 << OPTBIT_ROUTE)) + 0, // r |
| OPT_wide = IF_FEATURE_NETSTAT_WIDE((1 << OPTBIT_WIDE )) + 0, // W |
| OPT_prg = IF_FEATURE_NETSTAT_PRG( (1 << OPTBIT_PRG )) + 0, // p |
| }; |
| |
| #define NETSTAT_CONNECTED 0x01 |
| #define NETSTAT_LISTENING 0x02 |
| #define NETSTAT_NUMERIC 0x04 |
| /* Must match getopt32 option string */ |
| #define NETSTAT_TCP 0x10 |
| #define NETSTAT_UDP 0x20 |
| #define NETSTAT_RAW 0x40 |
| #define NETSTAT_UNIX 0x80 |
| #define NETSTAT_ALLPROTO (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW|NETSTAT_UNIX) |
| |
| |
| enum { |
| 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, /* now a valid state */ |
| }; |
| |
| static const char *const tcp_state[] = { |
| "", |
| "ESTABLISHED", |
| "SYN_SENT", |
| "SYN_RECV", |
| "FIN_WAIT1", |
| "FIN_WAIT2", |
| "TIME_WAIT", |
| "CLOSE", |
| "CLOSE_WAIT", |
| "LAST_ACK", |
| "LISTEN", |
| "CLOSING" |
| }; |
| |
| typedef enum { |
| SS_FREE = 0, /* not allocated */ |
| SS_UNCONNECTED, /* unconnected to any socket */ |
| SS_CONNECTING, /* in process of connecting */ |
| SS_CONNECTED, /* connected to socket */ |
| SS_DISCONNECTING /* in process of disconnecting */ |
| } socket_state; |
| |
| #define SO_ACCEPTCON (1<<16) /* performed a listen */ |
| #define SO_WAITDATA (1<<17) /* wait data to read */ |
| #define SO_NOSPACE (1<<18) /* no space to write */ |
| |
| #define ADDR_NORMAL_WIDTH 23 |
| /* When there are IPv6 connections the IPv6 addresses will be |
| * truncated to none-recognition. The '-W' option makes the |
| * address columns wide enough to accommodate for longest possible |
| * IPv6 addresses, i.e. addresses of the form |
| * xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:ddd.ddd.ddd.ddd |
| */ |
| #define ADDR_WIDE 51 /* INET6_ADDRSTRLEN + 5 for the port number */ |
| #if ENABLE_FEATURE_NETSTAT_WIDE |
| # define FMT_NET_CONN_DATA "%s %6lu %6lu %-*s %-*s %-12s" |
| # define FMT_NET_CONN_HEADER "\nProto Recv-Q Send-Q %-*s %-*s State %s\n" |
| #else |
| # define FMT_NET_CONN_DATA "%s %6lu %6lu %-23s %-23s %-12s" |
| # define FMT_NET_CONN_HEADER "\nProto Recv-Q Send-Q %-23s %-23s State %s\n" |
| #endif |
| |
| #define PROGNAME_WIDTH 20 |
| #define PROGNAME_WIDTH_STR "20" |
| /* PROGNAME_WIDTH chars: 12345678901234567890 */ |
| #define PROGNAME_BANNER "PID/Program name " |
| |
| struct prg_node { |
| struct prg_node *next; |
| long inode; |
| char name[PROGNAME_WIDTH]; |
| }; |
| |
| #define PRG_HASH_SIZE 211 |
| |
| struct globals { |
| smalluint flags; |
| #if ENABLE_FEATURE_NETSTAT_PRG |
| smallint prg_cache_loaded; |
| struct prg_node *prg_hash[PRG_HASH_SIZE]; |
| #endif |
| #if ENABLE_FEATURE_NETSTAT_PRG |
| const char *progname_banner; |
| #endif |
| #if ENABLE_FEATURE_NETSTAT_WIDE |
| unsigned addr_width; |
| #endif |
| }; |
| #define G (*ptr_to_globals) |
| #define flags (G.flags ) |
| #define prg_cache_loaded (G.prg_cache_loaded) |
| #define prg_hash (G.prg_hash ) |
| #if ENABLE_FEATURE_NETSTAT_PRG |
| # define progname_banner (G.progname_banner ) |
| #else |
| # define progname_banner "" |
| #endif |
| #define INIT_G() do { \ |
| SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ |
| flags = NETSTAT_CONNECTED | NETSTAT_ALLPROTO; \ |
| } while (0) |
| |
| |
| #if ENABLE_FEATURE_NETSTAT_PRG |
| |
| /* Deliberately truncating long to unsigned *int* */ |
| #define PRG_HASHIT(x) ((unsigned)(x) % PRG_HASH_SIZE) |
| |
| static void prg_cache_add(long inode, char *name) |
| { |
| unsigned hi = PRG_HASHIT(inode); |
| struct prg_node **pnp, *pn; |
| |
| prg_cache_loaded = 2; |
| for (pnp = prg_hash + hi; (pn = *pnp) != NULL; pnp = &pn->next) { |
| if (pn->inode == inode) { |
| /* Some warning should be appropriate here |
| * as we got multiple processes for one i-node */ |
| return; |
| } |
| } |
| *pnp = xzalloc(sizeof(struct prg_node)); |
| pn = *pnp; |
| pn->inode = inode; |
| safe_strncpy(pn->name, name, PROGNAME_WIDTH); |
| } |
| |
| static const char *prg_cache_get(long inode) |
| { |
| unsigned hi = PRG_HASHIT(inode); |
| struct prg_node *pn; |
| |
| for (pn = prg_hash[hi]; pn; pn = pn->next) |
| if (pn->inode == inode) |
| return pn->name; |
| return "-"; |
| } |
| |
| #if ENABLE_FEATURE_CLEAN_UP |
| static void prg_cache_clear(void) |
| { |
| struct prg_node **pnp, *pn; |
| |
| for (pnp = prg_hash; pnp < prg_hash + PRG_HASH_SIZE; pnp++) { |
| while ((pn = *pnp) != NULL) { |
| *pnp = pn->next; |
| free(pn); |
| } |
| } |
| } |
| #else |
| #define prg_cache_clear() ((void)0) |
| #endif |
| |
| static long extract_socket_inode(const char *lname) |
| { |
| long inode = -1; |
| |
| if (is_prefixed_with(lname, "socket:[")) { |
| /* "socket:[12345]", extract the "12345" as inode */ |
| inode = bb_strtoul(lname + sizeof("socket:[")-1, (char**)&lname, 0); |
| if (*lname != ']') |
| inode = -1; |
| } else if (is_prefixed_with(lname, "[0000]:")) { |
| /* "[0000]:12345", extract the "12345" as inode */ |
| inode = bb_strtoul(lname + sizeof("[0000]:")-1, NULL, 0); |
| if (errno) /* not NUL terminated? */ |
| inode = -1; |
| } |
| |
| #if 0 /* bb_strtol returns all-ones bit pattern on ERANGE anyway */ |
| if (errno == ERANGE) |
| inode = -1; |
| #endif |
| return inode; |
| } |
| |
| static int FAST_FUNC add_to_prg_cache_if_socket(const char *fileName, |
| struct stat *statbuf UNUSED_PARAM, |
| void *pid_slash_progname, |
| int depth UNUSED_PARAM) |
| { |
| char *linkname; |
| long inode; |
| |
| linkname = xmalloc_readlink(fileName); |
| if (linkname != NULL) { |
| inode = extract_socket_inode(linkname); |
| free(linkname); |
| if (inode >= 0) |
| prg_cache_add(inode, (char *)pid_slash_progname); |
| } |
| return TRUE; |
| } |
| |
| static int FAST_FUNC dir_act(const char *fileName, |
| struct stat *statbuf UNUSED_PARAM, |
| void *userData UNUSED_PARAM, |
| int depth) |
| { |
| const char *pid; |
| char *pid_slash_progname; |
| char proc_pid_fname[sizeof("/proc/%u/cmdline") + sizeof(long)*3]; |
| char cmdline_buf[512]; |
| int n, len; |
| |
| if (depth == 0) /* "/proc" itself */ |
| return TRUE; /* continue looking one level below /proc */ |
| |
| pid = fileName + sizeof("/proc/")-1; /* point after "/proc/" */ |
| if (!isdigit(pid[0])) /* skip /proc entries which aren't processes */ |
| return SKIP; |
| |
| len = snprintf(proc_pid_fname, sizeof(proc_pid_fname), "%s/cmdline", fileName); |
| n = open_read_close(proc_pid_fname, cmdline_buf, sizeof(cmdline_buf) - 1); |
| if (n < 0) |
| return FALSE; |
| cmdline_buf[n] = '\0'; |
| |
| /* go through all files in /proc/PID/fd and check whether they are sockets */ |
| strcpy(proc_pid_fname + len - (sizeof("cmdline")-1), "fd"); |
| pid_slash_progname = concat_path_file(pid, bb_basename(cmdline_buf)); /* "PID/argv0" */ |
| n = recursive_action(proc_pid_fname, |
| ACTION_RECURSE | ACTION_QUIET, |
| add_to_prg_cache_if_socket, |
| NULL, |
| (void *)pid_slash_progname, |
| 0); |
| free(pid_slash_progname); |
| |
| if (!n) |
| return FALSE; /* signal permissions error to caller */ |
| |
| return SKIP; /* caller should not recurse further into this dir */ |
| } |
| |
| static void prg_cache_load(void) |
| { |
| int load_ok; |
| |
| prg_cache_loaded = 1; |
| load_ok = recursive_action("/proc", ACTION_RECURSE | ACTION_QUIET, |
| NULL, dir_act, NULL, 0); |
| if (load_ok) |
| return; |
| |
| if (prg_cache_loaded == 1) |
| bb_simple_error_msg("can't scan /proc - are you root?"); |
| else |
| bb_simple_error_msg("showing only processes with your user ID"); |
| } |
| |
| #else |
| |
| #define prg_cache_clear() ((void)0) |
| |
| #endif //ENABLE_FEATURE_NETSTAT_PRG |
| |
| |
| #if ENABLE_FEATURE_IPV6 |
| static void build_ipv6_addr(char* local_addr, struct sockaddr_in6* localaddr) |
| { |
| char addr6[INET6_ADDRSTRLEN]; |
| struct in6_addr in6; |
| |
| sscanf(local_addr, "%08X%08X%08X%08X", |
| &in6.s6_addr32[0], &in6.s6_addr32[1], |
| &in6.s6_addr32[2], &in6.s6_addr32[3]); |
| inet_ntop(AF_INET6, &in6, addr6, sizeof(addr6)); |
| inet_pton(AF_INET6, addr6, &localaddr->sin6_addr); |
| |
| localaddr->sin6_family = AF_INET6; |
| } |
| #endif |
| |
| static void build_ipv4_addr(char* local_addr, struct sockaddr_in* localaddr) |
| { |
| sscanf(local_addr, "%X", &localaddr->sin_addr.s_addr); |
| localaddr->sin_family = AF_INET; |
| } |
| |
| static const char *get_sname(int port, const char *proto, int numeric) |
| { |
| if (!port) |
| return "*"; |
| if (!numeric) { |
| struct servent *se = getservbyport(port, proto); |
| if (se) |
| return se->s_name; |
| } |
| /* hummm, we may return static buffer here!! */ |
| return itoa(ntohs(port)); |
| } |
| |
| static char *ip_port_str(struct sockaddr *addr, int port, const char *proto, int numeric) |
| { |
| char *host, *host_port; |
| |
| /* Code which used "*" for INADDR_ANY is removed: it's ambiguous |
| * in IPv6, while "0.0.0.0" is not. */ |
| |
| host = NULL; |
| if (!numeric) |
| host = xmalloc_sockaddr2host_noport(addr); |
| if (!host) |
| host = xmalloc_sockaddr2dotted_noport(addr); |
| |
| host_port = xasprintf("%s:%s", host, get_sname(htons(port), proto, numeric)); |
| free(host); |
| return host_port; |
| } |
| |
| struct inet_params { |
| int local_port, rem_port, state, uid; |
| union { |
| struct sockaddr sa; |
| struct sockaddr_in sin; |
| #if ENABLE_FEATURE_IPV6 |
| struct sockaddr_in6 sin6; |
| #endif |
| } localaddr, remaddr; |
| unsigned long rxq, txq, inode; |
| }; |
| |
| static int scan_inet_proc_line(struct inet_params *param, char *line) |
| { |
| int num; |
| /* IPv6 /proc files use 32-char hex representation |
| * of IPv6 address, followed by :PORT_IN_HEX |
| */ |
| char local_addr[33], rem_addr[33]; /* 32 + 1 for NUL */ |
| |
| num = sscanf(line, |
| "%*d: %32[0-9A-Fa-f]:%X " |
| "%32[0-9A-Fa-f]:%X %X " |
| "%lX:%lX %*X:%*X " |
| "%*X %d %*d %lu ", |
| local_addr, ¶m->local_port, |
| rem_addr, ¶m->rem_port, ¶m->state, |
| ¶m->txq, ¶m->rxq, |
| ¶m->uid, ¶m->inode); |
| if (num < 9) { |
| return 1; /* error */ |
| } |
| |
| if (strlen(local_addr) > 8) { |
| #if ENABLE_FEATURE_IPV6 |
| build_ipv6_addr(local_addr, ¶m->localaddr.sin6); |
| build_ipv6_addr(rem_addr, ¶m->remaddr.sin6); |
| #endif |
| } else { |
| build_ipv4_addr(local_addr, ¶m->localaddr.sin); |
| build_ipv4_addr(rem_addr, ¶m->remaddr.sin); |
| } |
| return 0; |
| } |
| |
| static void print_inet_line(struct inet_params *param, |
| const char *state_str, const char *proto, int is_connected) |
| { |
| if ((is_connected && (flags & NETSTAT_CONNECTED)) |
| || (!is_connected && (flags & NETSTAT_LISTENING)) |
| ) { |
| char *l = ip_port_str( |
| ¶m->localaddr.sa, param->local_port, |
| proto, flags & NETSTAT_NUMERIC); |
| char *r = ip_port_str( |
| ¶m->remaddr.sa, param->rem_port, |
| proto, flags & NETSTAT_NUMERIC); |
| printf(FMT_NET_CONN_DATA, |
| proto, param->rxq, param->txq, |
| IF_FEATURE_NETSTAT_WIDE(G.addr_width,) l, |
| IF_FEATURE_NETSTAT_WIDE(G.addr_width,) r, |
| state_str); |
| #if ENABLE_FEATURE_NETSTAT_PRG |
| if (option_mask32 & OPT_prg) |
| printf("%."PROGNAME_WIDTH_STR"s", prg_cache_get(param->inode)); |
| #endif |
| bb_putchar('\n'); |
| free(l); |
| free(r); |
| } |
| } |
| |
| static int FAST_FUNC tcp_do_one(char *line) |
| { |
| struct inet_params param; |
| |
| memset(¶m, 0, sizeof(param)); |
| if (scan_inet_proc_line(¶m, line)) |
| return 1; |
| |
| print_inet_line(¶m, tcp_state[param.state], "tcp", param.rem_port); |
| return 0; |
| } |
| |
| #if ENABLE_FEATURE_IPV6 |
| # define NOT_NULL_ADDR(A) ( \ |
| ( (A.sa.sa_family == AF_INET6) \ |
| && (A.sin6.sin6_addr.s6_addr32[0] | A.sin6.sin6_addr.s6_addr32[1] | \ |
| A.sin6.sin6_addr.s6_addr32[2] | A.sin6.sin6_addr.s6_addr32[3]) \ |
| ) || ( \ |
| (A.sa.sa_family == AF_INET) \ |
| && A.sin.sin_addr.s_addr != 0 \ |
| ) \ |
| ) |
| #else |
| # define NOT_NULL_ADDR(A) (A.sin.sin_addr.s_addr) |
| #endif |
| |
| static int FAST_FUNC udp_do_one(char *line) |
| { |
| int have_remaddr; |
| const char *state_str; |
| struct inet_params param; |
| |
| memset(¶m, 0, sizeof(param)); /* otherwise we display garbage IPv6 scope_ids */ |
| if (scan_inet_proc_line(¶m, line)) |
| return 1; |
| |
| state_str = "UNKNOWN"; |
| switch (param.state) { |
| case TCP_ESTABLISHED: |
| state_str = "ESTABLISHED"; |
| break; |
| case TCP_CLOSE: |
| state_str = ""; |
| break; |
| } |
| |
| have_remaddr = NOT_NULL_ADDR(param.remaddr); |
| print_inet_line(¶m, state_str, "udp", have_remaddr); |
| return 0; |
| } |
| |
| static int FAST_FUNC raw_do_one(char *line) |
| { |
| int have_remaddr; |
| struct inet_params param; |
| |
| if (scan_inet_proc_line(¶m, line)) |
| return 1; |
| |
| have_remaddr = NOT_NULL_ADDR(param.remaddr); |
| print_inet_line(¶m, itoa(param.state), "raw", have_remaddr); |
| return 0; |
| } |
| |
| static int FAST_FUNC unix_do_one(char *line) |
| { |
| unsigned long refcnt, proto, unix_flags; |
| unsigned long inode; |
| int type, state; |
| int num, path_ofs; |
| const char *ss_proto, *ss_state, *ss_type; |
| char ss_flags[32]; |
| |
| /* 2.6.15 may report lines like "... @/tmp/fam-user-^@^@^@^@^@^@^@..." |
| * Other users report long lines filled by NUL bytes. |
| * (those ^@ are NUL bytes too). We see them as empty lines. */ |
| if (!line[0]) |
| return 0; |
| |
| path_ofs = 0; /* paranoia */ |
| num = sscanf(line, "%*p: %lX %lX %lX %X %X %lu %n", |
| &refcnt, &proto, &unix_flags, &type, &state, &inode, &path_ofs); |
| if (num < 6) { |
| return 1; /* error */ |
| } |
| if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) != (NETSTAT_LISTENING|NETSTAT_CONNECTED)) { |
| if ((state == SS_UNCONNECTED) && (unix_flags & SO_ACCEPTCON)) { |
| if (!(flags & NETSTAT_LISTENING)) |
| return 0; |
| } else { |
| if (!(flags & NETSTAT_CONNECTED)) |
| return 0; |
| } |
| } |
| |
| switch (proto) { |
| case 0: |
| ss_proto = "unix"; |
| break; |
| default: |
| ss_proto = "??"; |
| } |
| |
| switch (type) { |
| case SOCK_STREAM: |
| ss_type = "STREAM"; |
| break; |
| case SOCK_DGRAM: |
| ss_type = "DGRAM"; |
| break; |
| case SOCK_RAW: |
| ss_type = "RAW"; |
| break; |
| case SOCK_RDM: |
| ss_type = "RDM"; |
| break; |
| case SOCK_SEQPACKET: |
| ss_type = "SEQPACKET"; |
| break; |
| default: |
| ss_type = "UNKNOWN"; |
| } |
| |
| switch (state) { |
| case SS_FREE: |
| ss_state = "FREE"; |
| break; |
| case SS_UNCONNECTED: |
| /* |
| * Unconnected sockets may be listening |
| * for something. |
| */ |
| if (unix_flags & SO_ACCEPTCON) { |
| ss_state = "LISTENING"; |
| } else { |
| ss_state = ""; |
| } |
| break; |
| case SS_CONNECTING: |
| ss_state = "CONNECTING"; |
| break; |
| case SS_CONNECTED: |
| ss_state = "CONNECTED"; |
| break; |
| case SS_DISCONNECTING: |
| ss_state = "DISCONNECTING"; |
| break; |
| default: |
| ss_state = "UNKNOWN"; |
| } |
| |
| strcpy(ss_flags, "[ "); |
| if (unix_flags & SO_ACCEPTCON) |
| strcat(ss_flags, "ACC "); |
| if (unix_flags & SO_WAITDATA) |
| strcat(ss_flags, "W "); |
| if (unix_flags & SO_NOSPACE) |
| strcat(ss_flags, "N "); |
| strcat(ss_flags, "]"); |
| |
| printf("%-5s %-6lu %-11s %-10s %-13s %6lu ", |
| ss_proto, refcnt, ss_flags, ss_type, ss_state, inode |
| ); |
| |
| #if ENABLE_FEATURE_NETSTAT_PRG |
| if (option_mask32 & OPT_prg) |
| printf("%-"PROGNAME_WIDTH_STR"s", prg_cache_get(inode)); |
| #endif |
| |
| /* TODO: currently we stop at first NUL byte. Is it a problem? */ |
| line += path_ofs; |
| chomp(line); |
| while (*line) |
| fputc_printable(*line++, stdout); |
| bb_putchar('\n'); |
| return 0; |
| } |
| |
| static void do_info(const char *file, int FAST_FUNC (*proc)(char *)) |
| { |
| int lnr; |
| FILE *procinfo; |
| char *buffer; |
| |
| /* _stdin is just to save "r" param */ |
| procinfo = fopen_or_warn_stdin(file); |
| if (procinfo == NULL) { |
| return; |
| } |
| lnr = 0; |
| /* Why xmalloc_fgets_str? because it doesn't stop on NULs */ |
| while ((buffer = xmalloc_fgets_str(procinfo, "\n")) != NULL) { |
| /* line 0 is skipped */ |
| if (lnr && proc(buffer)) |
| bb_error_msg("%s: bogus data on line %d", file, lnr + 1); |
| lnr++; |
| free(buffer); |
| } |
| fclose(procinfo); |
| } |
| |
| int netstat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int netstat_main(int argc UNUSED_PARAM, char **argv) |
| { |
| unsigned opt; |
| |
| INIT_G(); |
| |
| /* Option string must match NETSTAT_xxx constants */ |
| opt = getopt32(argv, NETSTAT_OPTS); |
| if (opt & OPT_sock_listen) { // -l |
| flags &= ~NETSTAT_CONNECTED; |
| flags |= NETSTAT_LISTENING; |
| } |
| if (opt & OPT_sock_all) flags |= NETSTAT_LISTENING | NETSTAT_CONNECTED; // -a |
| //if (opt & OPT_extended) // -e |
| if (opt & OPT_noresolve) flags |= NETSTAT_NUMERIC; // -n |
| //if (opt & OPT_sock_tcp) // -t: NETSTAT_TCP |
| //if (opt & OPT_sock_udp) // -u: NETSTAT_UDP |
| //if (opt & OPT_sock_raw) // -w: NETSTAT_RAW |
| //if (opt & OPT_sock_unix) // -x: NETSTAT_UNIX |
| #if ENABLE_ROUTE |
| if (opt & OPT_route) { // -r |
| bb_displayroutes(flags & NETSTAT_NUMERIC, !(opt & OPT_extended)); |
| return 0; |
| } |
| #endif |
| #if ENABLE_FEATURE_NETSTAT_WIDE |
| G.addr_width = ADDR_NORMAL_WIDTH; |
| if (opt & OPT_wide) { // -W |
| G.addr_width = ADDR_WIDE; |
| } |
| #endif |
| #if ENABLE_FEATURE_NETSTAT_PRG |
| progname_banner = ""; |
| if (opt & OPT_prg) { // -p |
| progname_banner = PROGNAME_BANNER; |
| prg_cache_load(); |
| } |
| #endif |
| |
| opt &= NETSTAT_ALLPROTO; |
| if (opt) { |
| flags &= ~NETSTAT_ALLPROTO; |
| flags |= opt; |
| } |
| if (flags & (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW)) { |
| printf("Active Internet connections "); /* xxx */ |
| |
| if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) == (NETSTAT_LISTENING|NETSTAT_CONNECTED)) |
| printf("(servers and established)"); |
| else if (flags & NETSTAT_LISTENING) |
| printf("(only servers)"); |
| else |
| printf("(w/o servers)"); |
| printf(FMT_NET_CONN_HEADER, |
| IF_FEATURE_NETSTAT_WIDE(G.addr_width,) "Local Address", |
| IF_FEATURE_NETSTAT_WIDE(G.addr_width,) "Foreign Address", |
| progname_banner |
| ); |
| } |
| if (flags & NETSTAT_TCP) { |
| do_info("/proc/net/tcp", tcp_do_one); |
| #if ENABLE_FEATURE_IPV6 |
| do_info("/proc/net/tcp6", tcp_do_one); |
| #endif |
| } |
| if (flags & NETSTAT_UDP) { |
| do_info("/proc/net/udp", udp_do_one); |
| #if ENABLE_FEATURE_IPV6 |
| do_info("/proc/net/udp6", udp_do_one); |
| #endif |
| } |
| if (flags & NETSTAT_RAW) { |
| do_info("/proc/net/raw", raw_do_one); |
| #if ENABLE_FEATURE_IPV6 |
| do_info("/proc/net/raw6", raw_do_one); |
| #endif |
| } |
| if (flags & NETSTAT_UNIX) { |
| printf("Active UNIX domain sockets "); |
| if ((flags & (NETSTAT_LISTENING|NETSTAT_CONNECTED)) == (NETSTAT_LISTENING|NETSTAT_CONNECTED)) |
| printf("(servers and established)"); |
| else if (flags & NETSTAT_LISTENING) |
| printf("(only servers)"); |
| else |
| printf("(w/o servers)"); |
| printf("\nProto RefCnt Flags Type State I-Node %sPath\n", progname_banner); |
| do_info("/proc/net/unix", unix_do_one); |
| } |
| prg_cache_clear(); |
| return 0; |
| } |