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Diffstat (limited to 'toys')
-rw-r--r--toys/pending/netstat.c279
1 files changed, 108 insertions, 171 deletions
diff --git a/toys/pending/netstat.c b/toys/pending/netstat.c
index 415a4f65..c14c79e0 100644
--- a/toys/pending/netstat.c
+++ b/toys/pending/netstat.c
@@ -16,7 +16,7 @@ config NETSTAT
-r routing table
-a all sockets (not just connected)
- -l lay listening server sockets
+ -l listening server sockets
-t TCP sockets
-u UDP sockets
-w raw sockets
@@ -33,58 +33,40 @@ config NETSTAT
GLOBALS(
struct num_cache *inodes;
- int some_process_unidentified;
+ int wpad;
);
-typedef union _iaddr {
- unsigned u;
- unsigned char b[4];
-} iaddr;
-
-typedef union _iaddr6 {
- struct {
- unsigned a;
- unsigned b;
- unsigned c;
- unsigned d;
- } u;
- unsigned char b[16];
-} iaddr6;
-
-#define ADDR_LEN (INET6_ADDRSTRLEN + 1 + 5 + 1)//IPv6 addr len + : + port + '\0'
-
/*
* For TCP/UDP/RAW display data.
*/
-static void display_data(unsigned rport, char *label,
+static void display_data(unsigned rport, char *proto,
unsigned rxq, unsigned txq, char *lip, char *rip,
unsigned state, unsigned uid, unsigned long inode)
{
- char *ss_state = "UNKNOWN", buf[12];
+ char *ss_state = "UNKNOWN", buf[12], *s;
char *state_label[] = {"", "ESTABLISHED", "SYN_SENT", "SYN_RECV", "FIN_WAIT1",
"FIN_WAIT2", "TIME_WAIT", "CLOSE", "CLOSE_WAIT",
"LAST_ACK", "LISTEN", "CLOSING", "UNKNOWN"};
- char user[11];
struct passwd *pw;
- if (!strcmp(label, "tcp")) {
+ s = proto;
+ if (strstart(&s, "tcp")) {
int sz = ARRAY_LEN(state_label);
if (!state || state >= sz) state = sz-1;
ss_state = state_label[state];
- } else if (!strcmp(label, "udp")) {
+ } else if (strstart(&s, "udp")) {
if (state == 1) ss_state = state_label[state];
else if (state == 7) ss_state = "";
- } else if (!strcmp(label, "raw")) sprintf(ss_state = buf, "%u", state);
+ } else if (strstart(&s, "raw")) sprintf(ss_state = buf, "%u", state);
- if (!(toys.optflags & FLAG_n) && (pw = getpwuid(uid)))
- snprintf(user, sizeof(user), "%s", pw->pw_name);
- else snprintf(user, sizeof(user), "%d", uid);
+ if (!(toys.optflags & FLAG_n) && (pw = bufgetpwuid(uid)))
+ snprintf(toybuf, sizeof(toybuf), "%s", pw->pw_name);
+ else snprintf(toybuf, sizeof(toybuf), "%d", uid);
- xprintf("%3s %6d %6d ", label, rxq, txq);
- xprintf((toys.optflags & FLAG_W) ? "%-51.51s %-51.51s " : "%-23.23s %-23.23s "
- , lip, rip);
- xprintf("%-11s", ss_state);
- if ((toys.optflags & FLAG_e)) xprintf(" %-10s %-11ld", user, inode);
+ printf("%-6s%6d%7d ", proto, rxq, txq);
+ printf("%*.*s %*.*s ", -TT.wpad, TT.wpad, lip, -TT.wpad, TT.wpad, rip);
+ printf("%-11s", ss_state);
+ if ((toys.optflags & FLAG_e)) printf(" %-10s %-11ld", toybuf, inode);
if ((toys.optflags & FLAG_p)) {
struct num_cache *nc = get_num_cache(TT.inodes, inode);
@@ -93,125 +75,74 @@ static void display_data(unsigned rport, char *label,
xputc('\n');
}
-/*
- * For TCP/UDP/RAW show data.
- */
-static void show_data(unsigned rport, char *label, unsigned rxq, unsigned txq,
- char *lip, char *rip, unsigned state, unsigned uid,
- unsigned long inode)
+// convert address into text format.
+static void addr2str(int af, void *addr, unsigned port, char *buf, int len,
+ char *proto)
{
- if (toys.optflags & FLAG_l) {
- if (!rport && (state & 0xA))
- display_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
- } else if (toys.optflags & FLAG_a)
- display_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
- //rport && (TCP | UDP | RAW)
- else if (rport & (0x10 | 0x20 | 0x40))
- display_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
-}
+ int pos, count;
+ struct servent *ser = 0;
-/*
- * used to get service name.
- */
-static char *get_servname(int port, char *label)
-{
- int lport = htons(port);
-
- if (!lport) return xmprintf("%s", "*");
- struct servent *ser = getservbyport(lport, label);
- if (ser) return xmprintf("%s", ser->s_name);
- return xmprintf("%u", (unsigned)ntohs(lport));
-}
+ // Convert to numeric address
+ if (!inet_ntop(af, addr, buf, 256)) {
+ *buf = 0;
-/*
- * used to convert address into text format.
- */
-static void addr2str(int af, void *addr, unsigned port, char *buf, char *label)
-{
- char ip[ADDR_LEN] = {0,};
- if (!inet_ntop(af, addr, ip, ADDR_LEN)) {
- *buf = '\0';
return;
}
- size_t iplen = strlen(ip);
+ buf[len] = 0;
+ pos = strlen(buf);
+
+ // If there's no port number, it's a local :* binding, nothing to look up.
if (!port) {
- strncat(ip+iplen, ":*", ADDR_LEN-iplen-1);
- memcpy(buf, ip, ADDR_LEN);
+ if (len-pos<2) pos = len-2;
+ strcpy(buf+pos, ":*");
+
return;
}
if (!(toys.optflags & FLAG_n)) {
struct addrinfo hints, *result, *rp;
+ char cut[4];
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = af;
- if (!getaddrinfo(ip, NULL, &hints, &result)) {
- char hbuf[NI_MAXHOST] = {0,}, sbuf[NI_MAXSERV] = {0,};
- socklen_t sock_len;
- char *sname = NULL;
- int plen = 0;
-
- if (af == AF_INET) sock_len = sizeof(struct sockaddr_in);
- else sock_len = sizeof(struct sockaddr_in6);
+ if (!getaddrinfo(buf, NULL, &hints, &result)) {
+ socklen_t sock_len = (af == AF_INET) ? sizeof(struct sockaddr_in)
+ : sizeof(struct sockaddr_in6);
+ // We assume that a failing getnameinfo dosn't stomp "buf" here.
for (rp = result; rp; rp = rp->ai_next)
- if (!getnameinfo(rp->ai_addr, sock_len, hbuf, sizeof(hbuf), sbuf,
- sizeof(sbuf), NI_NUMERICSERV))
- break;
-
+ if (!getnameinfo(rp->ai_addr, sock_len, buf, 256, 0, 0, 0)) break;
freeaddrinfo(result);
- sname = get_servname(port, label);
- plen = strlen(sname);
- if (*hbuf) {
- memset(ip, 0, ADDR_LEN);
- memcpy(ip, hbuf, (ADDR_LEN - plen - 2));
- iplen = strlen(ip);
- }
- snprintf(ip + iplen, ADDR_LEN-iplen, ":%s", sname);
- free(sname);
+ buf[len] = 0;
+ pos = strlen(buf);
}
- }
- else snprintf(ip+iplen, ADDR_LEN-iplen, ":%d", port);
- memcpy(buf, ip, ADDR_LEN);
-}
-/*
- * display ipv4 info for TCP/UDP/RAW.
- */
-static void show_ipv4(char *fname, char *label)
-{
- FILE *fp = fopen(fname, "r");
- if (!fp) {
- perror_msg("'%s'", fname);
- return;
+ // Doesn't understand proto "tcp6", so truncate
+ memcpy(cut, proto, 3);
+ cut[3] = 0;
+ ser = getservbyport(htons(port), cut);
}
- if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header.
-
- while (fgets(toybuf, sizeof(toybuf), fp)) {
- char lip[ADDR_LEN] = {0,}, rip[ADDR_LEN] = {0,};
- iaddr laddr, raddr;
- unsigned lport, rport, state, txq, rxq, num, uid;
- unsigned long inode;
-
- int nitems = sscanf(toybuf, " %d: %x:%x %x:%x %x %x:%x %*X:%*X %*X %d %*d %ld",
- &num, &laddr.u, &lport, &raddr.u, &rport, &state, &txq,
- &rxq, &uid, &inode);
- if (nitems == 10) {
- addr2str(AF_INET, &laddr, lport, lip, label);
- addr2str(AF_INET, &raddr, rport, rip, label);
- show_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
+ // Append :service
+ count = snprintf(0, 0, ":%u", port);
+ if (ser) {
+ count = snprintf(0, 0, ":%s", ser->s_name);
+ // sheer paranoia
+ if (count>=len) {
+ count = len-1;
+ ser->s_name[count] = 0;
}
- }//End of While
- fclose(fp);
+ }
+ if (len-pos<count) pos = len-count;
+ if (ser) sprintf(buf+pos, ":%s", ser->s_name);
+ else sprintf(buf+pos, ":%u", port);
}
-/*
- * display ipv6 info for TCP/UDP/RAW.
- */
-static void show_ipv6(char *fname, char *label)
+// Display info for tcp/udp/raw
+static void show_ip(char *fname)
{
+ char *label = strrchr(fname, '/')+1;
FILE *fp = fopen(fname, "r");
if (!fp) {
perror_msg("'%s'", fname);
@@ -221,23 +152,39 @@ static void show_ipv6(char *fname, char *label)
if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header.
while (fgets(toybuf, sizeof(toybuf), fp)) {
- char lip[ADDR_LEN] = {0,}, rip[ADDR_LEN] = {0,};
- iaddr6 laddr6, raddr6;
- unsigned lport, rport, state, txq, rxq, num, uid;
+ char lip[256], rip[256];
+ union {
+ struct {unsigned u; unsigned char b[4];} i4;
+ struct {struct {unsigned a, b, c, d;} u; unsigned char b[16];} i6;
+ } laddr, raddr;
+ unsigned lport, rport, state, txq, rxq, num, uid, nitems;
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,
- &laddr6.u.d, &lport, &raddr6.u.a, &raddr6.u.b,
- &raddr6.u.c, &raddr6.u.d, &rport, &state, &txq, &rxq,
- &uid, &inode);
- if (nitems == 16) {
- addr2str(AF_INET6, &laddr6, lport, lip, label);
- addr2str(AF_INET6, &raddr6, rport, rip, label);
- show_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
- }
- }//End of While
+ nitems = sscanf(toybuf,
+ " %d: %8x%8x%8x%8x:%x %8x%8x%8x%8x:%x %x %x:%x %*X:%*X %*X %d %*d %ld",
+ &num, &laddr.i6.u.a, &laddr.i6.u.b, &laddr.i6.u.c,
+ &laddr.i6.u.d, &lport, &raddr.i6.u.a, &raddr.i6.u.b,
+ &raddr.i6.u.c, &raddr.i6.u.d, &rport, &state, &txq, &rxq,
+ &uid, &inode);
+
+ if (nitems!=16) {
+ nitems = sscanf(toybuf,
+ " %d: %x:%x %x:%x %x %x:%x %*X:%*X %*X %d %*d %ld",
+ &num, &laddr.i4.u, &lport, &raddr.i4.u, &rport, &state, &txq,
+ &rxq, &uid, &inode);
+
+ if (nitems!=10) continue;
+ nitems = AF_INET;
+ } else nitems = AF_INET6;
+
+ addr2str(nitems, &laddr, lport, lip, TT.wpad, label);
+ addr2str(nitems, &raddr, rport, rip, TT.wpad, label);
+
+ // listening or all or TCP/UDP/RAW
+ if (((toys.optflags & FLAG_l) && (!rport && (state & 0xA)))
+ || (toys.optflags & FLAG_a) || (rport & (0x10 | 0x20 | 0x40)))
+ display_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
+ }
fclose(fp);
}
@@ -281,7 +228,7 @@ static void show_unix_sockets(void)
if (offset) {
if ((ss = strrchr(s = toybuf+offset, '\n'))) *ss = 0;
- xprintf("%s", s);
+ printf("%s", s);
}
xputc('\n');
}
@@ -343,7 +290,7 @@ static void display_routes(void)
if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header.
- xprintf("Kernel IP routing table\n"
+ printf("Kernel IP routing table\n"
"Destination Gateway Genmask Flags %s Iface\n",
!(toys.optflags&FLAG_e) ? " MSS Window irtt" : "Metric Ref Use");
@@ -383,10 +330,10 @@ static void display_routes(void)
*out = 0;
if (flags & RTF_REJECT) *flag_val = '!';
- xprintf("%-15.15s %-15.15s %-16s%-6s", destip, gateip, maskip, flag_val);
+ printf("%-15.15s %-15.15s %-16s%-6s", destip, gateip, maskip, flag_val);
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);
+ printf("%5d %-5d %6d %s\n", mss, win, irtt, iface);
+ else printf("%-6d %-2d %7d %s\n", metric, ref, use, iface);
}
fclose(fp);
@@ -397,6 +344,7 @@ void netstat_main(void)
int tuwx = FLAG_t|FLAG_u|FLAG_w|FLAG_x;
char *type = "w/o";
+ TT.wpad = (toys.optflags&FLAG_W) ? 51 : 23;
if (!(toys.optflags&(FLAG_r|tuwx))) toys.optflags |= tuwx;
if (toys.optflags & FLAG_r) display_routes();
if (!(toys.optflags&tuwx)) return;
@@ -404,45 +352,34 @@ void netstat_main(void)
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
- // list were identified.
- if (TT.some_process_unidentified)
- fprintf(stderr,
- "(Not all processes could be identified, non-owned process info\n"
- " will not be shown, you would have to be root to see it all.)\n");
- }
+ if (toys.optflags & FLAG_p) dirtree_read("/proc", scan_pids);
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);
-
- printf("Proto Recv-Q Send-Q %*s %*s State ", pad, "Local Addres",
- pad, "Foreign Address");
+ printf("Proto Recv-Q Send-Q %*s %*s State ", -TT.wpad, "Local Address",
+ -TT.wpad, "Foreign Address");
if (toys.optflags & FLAG_e) printf(" User Inode ");
if (toys.optflags & FLAG_p) printf(" PID/Program Name");
xputc('\n');
- if (toys.optflags & FLAG_t) {//For TCP
- show_ipv4("/proc/net/tcp", "tcp");
- show_ipv6("/proc/net/tcp6", "tcp");
+ if (toys.optflags & FLAG_t) {
+ show_ip("/proc/net/tcp");
+ show_ip("/proc/net/tcp6");
}
- if (toys.optflags & FLAG_u) {//For UDP
- show_ipv4("/proc/net/udp", "udp");
- show_ipv6("/proc/net/udp6", "udp");
+ if (toys.optflags & FLAG_u) {
+ show_ip("/proc/net/udp");
+ show_ip("/proc/net/udp6");
}
- if (toys.optflags & FLAG_w) {//For raw
- show_ipv4("/proc/net/raw", "raw");
- show_ipv6("/proc/net/raw6", "raw");
+ if (toys.optflags & FLAG_w) {
+ show_ip("/proc/net/raw");
+ show_ip("/proc/net/raw6");
}
}
if (toys.optflags & FLAG_x) {
- xprintf("Active %s (%s servers)\n", "UNIX domain sockets", type);
+ printf("Active %s (%s servers)\n", "UNIX domain sockets", type);
- xprintf("Proto RefCnt Flags Type State I-Node %s Path\n",
+ printf("Proto RefCnt Flags\t Type\t State\t %s Path\n",
(toys.optflags&FLAG_p) ? "PID/Program Name" : "I-Node");
show_unix_sockets();
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 07:39:00 +0000