diff options
| -rw-r--r-- | toys/pending/netstat.c | 281 |
1 files changed, 97 insertions, 184 deletions
diff --git a/toys/pending/netstat.c b/toys/pending/netstat.c index bb72f461..a4096650 100644 --- a/toys/pending/netstat.c +++ b/toys/pending/netstat.c @@ -5,7 +5,7 @@ * * Not in SUSv4. * -USE_NETSTAT(NEWTOY(netstat, "pWrxwutneal", TOYFLAG_BIN)) +USE_NETSTAT(NEWTOY(netstat, "pWrxwutneal[-al]", TOYFLAG_BIN)) config NETSTAT bool "netstat" default n @@ -54,13 +54,6 @@ typedef union _iaddr6 { #define ADDR_LEN (INET6_ADDRSTRLEN + 1 + 5 + 1)//IPv6 addr len + : + port + '\0' -//For unix states -enum { - SOCK_ACCEPTCON = (1 << 16), //performed a listen. - SOCK_WAIT_DATA = (1 << 17), //wait data to read. - SOCK_NO_SPACE = (1 << 18), //no space to write. -}; - #define SOCK_NOT_CONNECTED 1 typedef struct _pidlist { @@ -273,8 +266,8 @@ static void show_ipv6(char *fname, char *label) { FILE *fp = fopen(fname, "r"); if (!fp) { - perror_msg("'%s'", fname); - return; + perror_msg("'%s'", fname); + return; } if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header. @@ -284,6 +277,7 @@ static void show_ipv6(char *fname, char *label) iaddr6 laddr6, raddr6; unsigned lport, rport, state, txq, rxq, num, uid; unsigned long inode; + int nitems = sscanf(toybuf, " %d: %8x%8x%8x%8x:%x %8x%8x%8x%8x:%x %x %x:%x " "%*X:%*X %*X %d %*d %ld", &num, &laddr6.u.a, &laddr6.u.b, &laddr6.u.c, @@ -299,72 +293,48 @@ static void show_ipv6(char *fname, char *label) fclose(fp); } -/* - * display unix socket info. - */ -static void show_unix_sockets(char *fname, char *label) +static void show_unix_sockets(void) { - FILE *fp = fopen((char *)fname, "r"); - if (!fp) { - perror_msg("'%s'", fname); - return; - } + char *types[] = {"","STREAM","DGRAM","RAW","RDM","SEQPACKET","DCCP","PACKET"}, + *states[] = {"","LISTENING","CONNECTING","CONNECTED","DISCONNECTING"}; + unsigned long refcount, flags, type, state, inode; + FILE *fp = xfopen("/proc/net/unix", "r"); if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header. while (fgets(toybuf, sizeof(toybuf), fp)) { - unsigned long refcount, label, flags, inode; - int nitems = 0, path_offset = 0, type, state; - char sock_flags[32] = {0,}, *sock_type, *sock_state, *bptr = toybuf, *term; + unsigned offset = 0; - if (!toybuf[0]) continue; + // count = 6 or 7 (first field ignored, sockets don't always have filenames) + if (6<sscanf(toybuf, "%*p: %lX %*X %lX %lX %lX %lu %n", + &refcount, &flags, &type, &state, &inode, &offset)) + continue; - nitems = sscanf(toybuf, "%*p: %lX %lX %lX %X %X %lu %n", - &refcount, &label, &flags, &type, &state, &inode, &path_offset); + // Linux exports only SO_ACCEPTCON since 2.3.15pre3 in 1999, but let's + // filter in case they add more someday. + flags &= 1<<16; - //for state one less - if (nitems < 6) break; + // Only show unconnected listening sockets with -a + if (state==1 && flags && !(toys.optflags&FLAG_a)) continue; - if (toys.optflags & FLAG_l) { - if ( !((state == SOCK_NOT_CONNECTED) && (flags & SOCK_ACCEPTCON)) ) - continue; - } else if (!(toys.optflags & FLAG_a)) { - if ((state == SOCK_NOT_CONNECTED) && (flags & SOCK_ACCEPTCON)) continue; - } + if (type==10) type = 7; // move SOCK_PACKET into line + if (type>ARRAY_LEN(types)) type = 0; + if (state>ARRAY_LEN(states)) state = 0; + sprintf(toybuf, "[ %s]", flags ? "ACC " : ""); - //prepare socket type, state and flags. - { - char *ss_type[] = { "", "STREAM", "DGRAM", "RAW", "RDM", "SEQPACKET", - "UNKNOWN"}; - char *ss_state[] = { "FREE", "LISTENING", "CONNECTING", "CONNECTED", - "DISCONNECTING", "UNKNOWN"}; - - int sz = ARRAY_LEN(ss_type);//sizeof(ss_type)/sizeof(ss_type[0]); - if ( (type < SOCK_STREAM) || (type > SOCK_SEQPACKET) ) - sock_type = ss_type[sz-1]; - else sock_type = ss_type[type]; - - sz = ARRAY_LEN(ss_state);//sizeof(ss_state)/sizeof(ss_state[0]); - if ((state < 0) || (state > sz-2)) sock_state = ss_state[sz-1]; - else if (state == SOCK_NOT_CONNECTED) { - if (flags & SOCK_ACCEPTCON) sock_state = ss_state[state]; - else sock_state = " "; - } else sock_state = ss_state[state]; - - strcpy(sock_flags, "[ "); - if (flags & SOCK_ACCEPTCON) strcat(sock_flags, "ACC "); - if (flags & SOCK_WAIT_DATA) strcat(sock_flags, "W "); - if (flags & SOCK_NO_SPACE) strcat(sock_flags, "N "); - strcat(sock_flags, "]"); + printf("unix %-6ld %-11s %-10s %-13s %8lu ", + refcount, toybuf, types[type], states[state], inode); + if (toys.optflags & FLAG_p) printf("%-20s", get_pid_name(inode)); + + if (offset) { + char *s = toybuf+offset, *ss; + + if ((ss = strrchr(s, '\n'))) *ss = 0; + xprintf("%s", s); } - xprintf("%-5s %-6ld %-11s %-10s %-13s %8lu ", (!label ? "unix" : "??"), - refcount, sock_flags, sock_type, sock_state, inode); - if (toys.optflags & FLAG_p) xprintf("%-20s", get_pid_name(inode)); - - bptr += path_offset; - if ((term = strchr(bptr, '\n'))) *term = '\0'; - xprintf("%s\n", bptr); - }//End of while + xputc('\n'); + } + fclose(fp); } @@ -472,111 +442,69 @@ static void clean_pid_list(void) } /* - * For TCP/UDP/RAW show the header. - */ -static void show_header(void) -{ - xprintf("Proto Recv-Q Send-Q "); - xprintf((toys.optflags & FLAG_W) ? "%-51s %-51s" : "%-23s %-23s", - "Local Address", "Foreign Address"); - xprintf(" State "); - if (toys.optflags & FLAG_e) xprintf(" User Inode "); - if (toys.optflags & FLAG_p) xprintf(" PID/Program Name"); - xputc('\n'); -} - -/* - * used to get the flag values for route command. + * extract inet4 route info from /proc/net/route file and display it. */ -static void get_flag_value(char *flagstr, int flags) +static void display_routes(void) { - int i = 0; - char *str = flagstr; static const char flagchars[] = "GHRDMDAC"; static const unsigned flagarray[] = { - RTF_GATEWAY, - RTF_HOST, - RTF_REINSTATE, - RTF_DYNAMIC, - RTF_MODIFIED, - RTF_DEFAULT, - RTF_ADDRCONF, - RTF_CACHE + RTF_GATEWAY, RTF_HOST, RTF_REINSTATE, RTF_DYNAMIC, RTF_MODIFIED }; - *str++ = 'U'; - - while ( (*str = flagchars[i]) ) { - if (flags & flagarray[i++]) ++str; - } -} - -/* - * extract inet4 route info from /proc/net/route file and display it. - */ -static void display_routes(int is_more_info, int notresolve) -{ -#define IPV4_MASK (RTF_GATEWAY|RTF_HOST|RTF_REINSTATE|RTF_DYNAMIC|RTF_MODIFIED) unsigned long dest, gate, mask; int flags, ref, use, metric, mss, win, irtt; - char iface[64]={0,}; - char flag_val[10]={0,}; //there are 9 flags "UGHRDMDAC" for route. - + char *out = toybuf, *flag_val; + char iface[64]={0}; FILE *fp = xfopen("/proc/net/route", "r"); if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header. xprintf("Kernel IP routing table\n" "Destination Gateway Genmask Flags %s Iface\n", - is_more_info ? " MSS Window irtt" : "Metric Ref Use"); + !(toys.optflags&FLAG_e) ? " MSS Window irtt" : "Metric Ref Use"); while (fgets(toybuf, sizeof(toybuf), fp)) { - int nitems = 0; - char *destip = NULL, *gateip = NULL, *maskip = NULL; - - nitems = sscanf(toybuf, "%63s%lx%lx%X%d%d%d%lx%d%d%d\n", iface, &dest, - &gate, &flags, &ref, &use, &metric, &mask, &mss, &win, &irtt); - if (nitems != 11) {//EOF with no (nonspace) chars read. - if ((nitems < 0) && feof(fp)) break; - perror_exit("sscanf"); - } + char *destip = 0, *gateip = 0, *maskip = 0; - //skip down interfaces. + if (11 != sscanf(toybuf, "%63s%lx%lx%X%d%d%d%lx%d%d%d", iface, &dest, + &gate, &flags, &ref, &use, &metric, &mask, &mss, &win, &irtt)) + break; + + // skip down interfaces. if (!(flags & RTF_UP)) continue; - if (dest) {//For Destination - if (inet_ntop(AF_INET, &dest, toybuf, sizeof(toybuf)) ) - destip = xstrdup(toybuf); - } else { - if (!notresolve) destip = xstrdup("default"); - else destip = xstrdup("0.0.0.0"); - } +// TODO /proc/net/ipv6_route - if (gate) {//For Gateway - if (inet_ntop(AF_INET, &gate, toybuf, sizeof(toybuf)) ) - gateip = xstrdup(toybuf); - } else { - if (!notresolve) gateip = xstrdup("*"); - else gateip = xstrdup("0.0.0.0"); - } + if (dest) { + if (inet_ntop(AF_INET, &dest, out, 16)) destip = out; + } else destip = (toys.optflags&FLAG_n) ? "0.0.0.0" : "default"; + out += 16; + if (gate) { + if (inet_ntop(AF_INET, &gate, out, 16)) gateip = out; + } else gateip = (toys.optflags&FLAG_n) ? "0.0.0.0" : "*"; + out += 16; + +// TODO /24 //For Mask - if (inet_ntop(AF_INET, &mask, toybuf, sizeof(toybuf)) ) - maskip = xstrdup(toybuf); + if (inet_ntop(AF_INET, &mask, out, 16)) maskip = out; + else maskip = "?"; + out += 16; //Get flag Values - get_flag_value(flag_val, flags & IPV4_MASK); - if (flags & RTF_REJECT) flag_val[0] = '!'; + flag_val = out; + *out++ = 'U'; + for (dest = 0; dest < ARRAY_LEN(flagarray); dest++) + if (flags&flagarray[dest]) *out++ = flagchars[dest]; + *out = 0; + if (flags & RTF_REJECT) *flag_val = '!'; xprintf("%-15.15s %-15.15s %-16s%-6s", destip, gateip, maskip, flag_val); - if (is_more_info) xprintf("%5d %-5d %6d %s\n", mss, win, irtt, iface); + if (!(toys.optflags & FLAG_e)) + xprintf("%5d %-5d %6d %s\n", mss, win, irtt, iface); else xprintf("%-6d %-2d %7d %s\n", metric, ref, use, iface); + } - if (destip) free(destip); - if (gateip) free(gateip); - if (maskip) free(maskip); - }//end of while. fclose(fp); -#undef IPV4_MASK } /* @@ -584,30 +512,20 @@ static void display_routes(int is_more_info, int notresolve) */ void netstat_main(void) { -#define IS_NETSTAT_PROTO_FLAGS_UP (toys.optflags & (FLAG_t | FLAG_u | FLAG_w \ - | FLAG_x)) - - // For no parameter, add 't', 'u', 'w', 'x' options as default - if (!toys.optflags) toys.optflags = FLAG_t | FLAG_u | FLAG_w | FLAG_x; + char *type = "w/o"; - // For both 'a' and 'l' are set, remove 'l' option - if (toys.optflags & FLAG_a && toys.optflags & FLAG_l) - toys.optflags &= ~FLAG_l; - - // For each 'a', 'l', 'e', 'n', 'W', 'p' options - // without any 't', 'u', 'w', 'x' option, add 't', 'u', 'w', 'x' options - if (((toys.optflags & FLAG_a) || (toys.optflags & FLAG_l) || - (toys.optflags & FLAG_e) || (toys.optflags & FLAG_n) || - (toys.optflags & FLAG_W) || (toys.optflags & FLAG_p)) && - (!IS_NETSTAT_PROTO_FLAGS_UP) ) - toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x; - - //Display routing table. if (toys.optflags & FLAG_r) { - display_routes(!(toys.optflags & FLAG_e), (toys.optflags & FLAG_n)); + display_routes(); + return; } + if (!(toys.optflags&(FLAG_t|FLAG_u|FLAG_w|FLAG_x))) + toys.optflags |= FLAG_t|FLAG_u|FLAG_w|FLAG_x; + + if (toys.optflags & FLAG_a) type = "established and"; + else if (toys.optflags & FLAG_l) type = "only"; + if (toys.optflags & FLAG_p) { dirtree_read("/proc", scan_pids); // TODO: we probably shouldn't warn if all the processes we're going to @@ -618,16 +536,17 @@ void netstat_main(void) " will not be shown, you would have to be root to see it all.)\n"); } - //For TCP/UDP/RAW. - if ( (toys.optflags & FLAG_t) || (toys.optflags & FLAG_u) || - (toys.optflags & FLAG_w) ) { - xprintf("Active Internet connections "); + if (toys.optflags&(FLAG_t|FLAG_u|FLAG_w)) { + int pad = (toys.optflags&FLAG_W) ? -51 : -23; + + printf("Active %s (%s servers)\n", "Internet connections", type); - if (toys.optflags & FLAG_a) xprintf("(servers and established)\n"); - else if (toys.optflags & FLAG_l) xprintf("(only servers)\n"); - else xprintf("(w/o servers)\n"); + printf("Proto Recv-Q Send-Q %*s %*s State ", pad, "Local Addres", + pad, "Foreign Address"); + if (toys.optflags & FLAG_e) printf(" User Inode "); + if (toys.optflags & FLAG_p) printf(" PID/Program Name"); + xputc('\n'); - show_header(); if (toys.optflags & FLAG_t) {//For TCP show_ipv4("/proc/net/tcp", "tcp"); show_ipv6("/proc/net/tcp6", "tcp"); @@ -641,21 +560,15 @@ void netstat_main(void) show_ipv6("/proc/net/raw6", "raw"); } } - if (toys.optflags & FLAG_x) {//For UNIX - xprintf("Active UNIX domain sockets "); - if (toys.optflags & FLAG_a) xprintf("(servers and established)\n"); - else if (toys.optflags & FLAG_l) xprintf("(only servers)\n"); - else xprintf("(w/o servers)\n"); - - if (toys.optflags & FLAG_p) - xprintf("Proto RefCnt Flags Type State " - "I-Node PID/Program Name Path\n"); - else - xprintf("Proto RefCnt Flags Type State " - "I-Node Path\n"); - show_unix_sockets("/proc/net/unix", "unix"); + + if (toys.optflags & FLAG_x) { + xprintf("Active %s (%s servers)\n", "UNIX domain sockets", type); + + xprintf("Proto RefCnt Flags Type State I-Node %s Path\n", + (toys.optflags&FLAG_p) ? "PID/Program Name" : "I-Node"); + show_unix_sockets(); } + if (toys.optflags & FLAG_p) clean_pid_list(); - if (toys.exitval) toys.exitval = 0; -#undef IS_NETSTAT_PROTO_FLAGS_UP + toys.exitval = 0; } |