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-rw-r--r--lib/parse.c752
1 files changed, 752 insertions, 0 deletions
diff --git a/lib/parse.c b/lib/parse.c
new file mode 100644
index 000000000000..1a49d16bbd7e
--- /dev/null
+++ b/lib/parse.c
@@ -0,0 +1,752 @@
+/*
+ * Copyright (C) 1993-2001 by Darren Reed.
+ *
+ * See the IPFILTER.LICENCE file for details on licencing.
+ *
+ * $Id: parse.c,v 1.34.2.1 2004/12/09 19:41:21 darrenr Exp $
+ */
+#include <ctype.h>
+#include "ipf.h"
+#include "opts.h"
+
+static frentry_t *fp = NULL;
+
+/* parse()
+ *
+ * parse a line read from the input filter rule file
+ */
+struct frentry *parse(line, linenum)
+char *line;
+int linenum;
+{
+ static fripf_t fip;
+ char *cps[31], **cpp, *endptr, *proto = NULL, *s;
+ struct protoent *p = NULL;
+ int i, cnt = 1, j;
+ u_int k;
+
+ if (fp == NULL) {
+ fp = malloc(sizeof(*fp));
+ if (fp == NULL)
+ return NULL;
+ }
+
+ while (*line && ISSPACE(*line))
+ line++;
+ if (!*line)
+ return NULL;
+
+ bzero((char *)fp, sizeof(*fp));
+ bzero((char *)&fip, sizeof(fip));
+ fp->fr_v = use_inet6 ? 6 : 4;
+ fp->fr_ipf = &fip;
+ fp->fr_dsize = sizeof(fip);
+ fp->fr_ip.fi_v = fp->fr_v;
+ fp->fr_mip.fi_v = 0xf;
+ fp->fr_type = FR_T_NONE;
+ fp->fr_loglevel = 0xffff;
+ fp->fr_isc = (void *)-1;
+ fp->fr_tag = FR_NOTAG;
+
+ /*
+ * break line up into max of 20 segments
+ */
+ if (opts & OPT_DEBUG)
+ fprintf(stderr, "parse [%s]\n", line);
+ for (i = 0, *cps = strtok(line, " \b\t\r\n"); cps[i] && i < 30; cnt++)
+ cps[++i] = strtok(NULL, " \b\t\r\n");
+ cps[i] = NULL;
+
+ if (cnt < 3) {
+ fprintf(stderr, "%d: not enough segments in line\n", linenum);
+ return NULL;
+ }
+
+ cpp = cps;
+ /*
+ * The presence of an '@' followed by a number gives the position in
+ * the current rule list to insert this one.
+ */
+ if (**cpp == '@')
+ fp->fr_hits = (U_QUAD_T)atoi(*cpp++ + 1) + 1;
+
+ /*
+ * Check the first keyword in the rule and any options that are
+ * expected to follow it.
+ */
+ if (!strcasecmp("block", *cpp)) {
+ fp->fr_flags |= FR_BLOCK;
+ if (!strncasecmp(*(cpp+1), "return-icmp-as-dest", 19) &&
+ (i = 19))
+ fp->fr_flags |= FR_FAKEICMP;
+ else if (!strncasecmp(*(cpp+1), "return-icmp", 11) && (i = 11))
+ fp->fr_flags |= FR_RETICMP;
+ if (fp->fr_flags & FR_RETICMP) {
+ cpp++;
+ if (strlen(*cpp) == i) {
+ if (*(cpp + 1) && **(cpp +1) == '(') {
+ cpp++;
+ i = 0;
+ } else
+ i = -1;
+ }
+
+ /*
+ * The ICMP code is not required to follow in ()'s
+ */
+ if ((i >= 0) && (*(*cpp + i) == '(')) {
+ i++;
+ j = icmpcode(*cpp + i);
+ if (j == -1) {
+ fprintf(stderr,
+ "%d: unrecognised icmp code %s\n",
+ linenum, *cpp + 20);
+ return NULL;
+ }
+ fp->fr_icode = j;
+ }
+ } else if (!strncasecmp(*(cpp+1), "return-rst", 10)) {
+ fp->fr_flags |= FR_RETRST;
+ cpp++;
+ }
+ } else if (!strcasecmp("count", *cpp)) {
+ fp->fr_flags |= FR_ACCOUNT;
+ } else if (!strcasecmp("pass", *cpp)) {
+ fp->fr_flags |= FR_PASS;
+ } else if (!strcasecmp("auth", *cpp)) {
+ fp->fr_flags |= FR_AUTH;
+ } else if (fp->fr_arg != 0) {
+ printf("skip %u", fp->fr_arg);
+ } else if (!strcasecmp("preauth", *cpp)) {
+ fp->fr_flags |= FR_PREAUTH;
+ } else if (!strcasecmp("nomatch", *cpp)) {
+ fp->fr_flags |= FR_NOMATCH;
+ } else if (!strcasecmp("skip", *cpp)) {
+ cpp++;
+ if (ratoui(*cpp, &k, 0, UINT_MAX))
+ fp->fr_arg = k;
+ else {
+ fprintf(stderr, "%d: integer must follow skip\n",
+ linenum);
+ return NULL;
+ }
+ } else if (!strcasecmp("log", *cpp)) {
+ fp->fr_flags |= FR_LOG;
+ if (!strcasecmp(*(cpp+1), "body")) {
+ fp->fr_flags |= FR_LOGBODY;
+ cpp++;
+ }
+ if (!strcasecmp(*(cpp+1), "first")) {
+ fp->fr_flags |= FR_LOGFIRST;
+ cpp++;
+ }
+ if (*cpp && !strcasecmp(*(cpp+1), "or-block")) {
+ fp->fr_flags |= FR_LOGORBLOCK;
+ cpp++;
+ }
+ if (!strcasecmp(*(cpp+1), "level")) {
+ cpp++;
+ if (loglevel(cpp, &fp->fr_loglevel, linenum) == -1)
+ return NULL;
+ cpp++;
+ }
+ } else {
+ /*
+ * Doesn't start with one of the action words
+ */
+ fprintf(stderr, "%d: unknown keyword (%s)\n", linenum, *cpp);
+ return NULL;
+ }
+ if (!*++cpp) {
+ fprintf(stderr, "%d: missing 'in'/'out' keyword\n", linenum);
+ return NULL;
+ }
+
+ /*
+ * Get the direction for filtering. Impose restrictions on direction
+ * if blocking with returning ICMP or an RST has been requested.
+ */
+ if (!strcasecmp("in", *cpp))
+ fp->fr_flags |= FR_INQUE;
+ else if (!strcasecmp("out", *cpp)) {
+ fp->fr_flags |= FR_OUTQUE;
+ if (fp->fr_flags & FR_RETICMP) {
+ fprintf(stderr,
+ "%d: Can only use return-icmp with 'in'\n",
+ linenum);
+ return NULL;
+ } else if (fp->fr_flags & FR_RETRST) {
+ fprintf(stderr,
+ "%d: Can only use return-rst with 'in'\n",
+ linenum);
+ return NULL;
+ }
+ }
+ if (!*++cpp) {
+ fprintf(stderr, "%d: missing source specification\n", linenum);
+ return NULL;
+ }
+
+ if (!strcasecmp("log", *cpp)) {
+ if (!*++cpp) {
+ fprintf(stderr, "%d: missing source specification\n",
+ linenum);
+ return NULL;
+ }
+ if (FR_ISPASS(fp->fr_flags))
+ fp->fr_flags |= FR_LOGP;
+ else if (FR_ISBLOCK(fp->fr_flags))
+ fp->fr_flags |= FR_LOGB;
+ if (*cpp && !strcasecmp(*cpp, "body")) {
+ fp->fr_flags |= FR_LOGBODY;
+ cpp++;
+ }
+ if (*cpp && !strcasecmp(*cpp, "first")) {
+ fp->fr_flags |= FR_LOGFIRST;
+ cpp++;
+ }
+ if (*cpp && !strcasecmp(*cpp, "or-block")) {
+ if (!FR_ISPASS(fp->fr_flags)) {
+ fprintf(stderr,
+ "%d: or-block must be used with pass\n",
+ linenum);
+ return NULL;
+ }
+ fp->fr_flags |= FR_LOGORBLOCK;
+ cpp++;
+ }
+ if (*cpp && !strcasecmp(*cpp, "level")) {
+ if (loglevel(cpp, &fp->fr_loglevel, linenum) == -1)
+ return NULL;
+ cpp++;
+ cpp++;
+ }
+ }
+
+ if (*cpp && !strcasecmp("quick", *cpp)) {
+ if (fp->fr_arg != 0) {
+ fprintf(stderr, "%d: cannot use skip with quick\n",
+ linenum);
+ return NULL;
+ }
+ cpp++;
+ fp->fr_flags |= FR_QUICK;
+ }
+
+ /*
+ * Parse rule options that are available if a rule is tied to an
+ * interface.
+ */
+ *fp->fr_ifname = '\0';
+ *fp->fr_oifname = '\0';
+ if (*cpp && !strcasecmp(*cpp, "on")) {
+ if (!*++cpp) {
+ fprintf(stderr, "%d: interface name missing\n",
+ linenum);
+ return NULL;
+ }
+ (void)strncpy(fp->fr_ifname, *cpp, IFNAMSIZ-1);
+ fp->fr_ifname[IFNAMSIZ-1] = '\0';
+ cpp++;
+ if (!*cpp) {
+ if ((fp->fr_flags & FR_RETMASK) == FR_RETRST) {
+ fprintf(stderr,
+ "%d: %s can only be used with TCP\n",
+ linenum, "return-rst");
+ return NULL;
+ }
+ return fp;
+ }
+
+ if (!strcasecmp(*cpp, "out-via")) {
+ if (fp->fr_flags & FR_OUTQUE) {
+ fprintf(stderr,
+ "out-via must be used with in\n");
+ return NULL;
+ }
+ cpp++;
+ (void)strncpy(fp->fr_oifname, *cpp, IFNAMSIZ-1);
+ fp->fr_oifname[IFNAMSIZ-1] = '\0';
+ cpp++;
+ } else if (!strcasecmp(*cpp, "in-via")) {
+ if (fp->fr_flags & FR_INQUE) {
+ fprintf(stderr,
+ "in-via must be used with out\n");
+ return NULL;
+ }
+ cpp++;
+ (void)strncpy(fp->fr_oifname, *cpp, IFNAMSIZ-1);
+ fp->fr_oifname[IFNAMSIZ-1] = '\0';
+ cpp++;
+ }
+
+ if (!strcasecmp(*cpp, "dup-to") && *(cpp + 1)) {
+ cpp++;
+ if (to_interface(&fp->fr_dif, *cpp, linenum))
+ return NULL;
+ cpp++;
+ }
+ if (*cpp && !strcasecmp(*cpp, "to") && *(cpp + 1)) {
+ cpp++;
+ if (to_interface(&fp->fr_tif, *cpp, linenum))
+ return NULL;
+ cpp++;
+ } else if (*cpp && !strcasecmp(*cpp, "fastroute")) {
+ if (!(fp->fr_flags & FR_INQUE)) {
+ fprintf(stderr,
+ "can only use %s with 'in'\n",
+ "fastroute");
+ return NULL;
+ }
+ fp->fr_flags |= FR_FASTROUTE;
+ cpp++;
+ }
+
+ /*
+ * Set the "other" interface name. Lets you specify both
+ * inbound and outbound interfaces for state rules. Do not
+ * prevent both interfaces from being the same.
+ */
+ strcpy(fp->fr_ifnames[3], "*");
+ if ((*cpp != NULL) && (*(cpp + 1) != NULL) &&
+ ((((fp->fr_flags & FR_INQUE) != 0) &&
+ (strcasecmp(*cpp, "out-via") == 0)) ||
+ (((fp->fr_flags & FR_OUTQUE) != 0) &&
+ (strcasecmp(*cpp, "in-via") == 0)))) {
+ cpp++;
+
+ s = strchr(*cpp, ',');
+ if (s != NULL) {
+ *s++ = '\0';
+ (void)strncpy(fp->fr_ifnames[3], s,
+ IFNAMSIZ - 1);
+ fp->fr_ifnames[3][IFNAMSIZ - 1] = '\0';
+ }
+
+ (void)strncpy(fp->fr_ifnames[2], *cpp, IFNAMSIZ - 1);
+ fp->fr_ifnames[2][IFNAMSIZ - 1] = '\0';
+ cpp++;
+ } else
+ strcpy(fp->fr_ifnames[2], "*");
+
+ }
+
+ if (*cpp && !strcasecmp(*cpp, "tos")) {
+ if (!*++cpp) {
+ fprintf(stderr, "%d: tos missing value\n", linenum);
+ return NULL;
+ }
+ fp->fr_tos = strtol(*cpp, NULL, 0);
+ fp->fr_mip.fi_tos = 0xff;
+ cpp++;
+ }
+
+ if (*cpp && !strcasecmp(*cpp, "ttl")) {
+ if (!*++cpp) {
+ fprintf(stderr, "%d: ttl missing hopcount value\n",
+ linenum);
+ return NULL;
+ }
+ if (ratoi(*cpp, &i, 0, 255))
+ fp->fr_ttl = i;
+ else {
+ fprintf(stderr, "%d: invalid ttl (%s)\n",
+ linenum, *cpp);
+ return NULL;
+ }
+ fp->fr_mip.fi_ttl = 0xff;
+ cpp++;
+ }
+
+ /*
+ * check for "proto <protoname>" only decode udp/tcp/icmp as protoname
+ */
+ if (*cpp && !strcasecmp(*cpp, "proto")) {
+ if (!*++cpp) {
+ fprintf(stderr, "%d: protocol name missing\n", linenum);
+ return NULL;
+ }
+ fp->fr_type = FR_T_IPF;
+ proto = *cpp++;
+ if (!strcasecmp(proto, "tcp/udp")) {
+ fp->fr_flx |= FI_TCPUDP;
+ fp->fr_mflx |= FI_TCPUDP;
+ } else if (use_inet6 && !strcasecmp(proto, "icmp")) {
+ fprintf(stderr,
+"%d: use proto ipv6-icmp with IPv6 (or use proto 1 if you really mean icmp)\n",
+ linenum);
+ return NULL;
+ } else {
+ fp->fr_proto = getproto(proto);
+ fp->fr_mip.fi_p = 0xff;
+ }
+ }
+ if ((fp->fr_proto != IPPROTO_TCP) &&
+ ((fp->fr_flags & FR_RETMASK) == FR_RETRST)) {
+ fprintf(stderr, "%d: %s can only be used with TCP\n",
+ linenum, "return-rst");
+ return NULL;
+ }
+
+ /*
+ * get the from host and bit mask to use against packets
+ */
+
+ if (!*cpp) {
+ fprintf(stderr, "%d: missing source specification\n", linenum);
+ return NULL;
+ }
+ if (!strcasecmp(*cpp, "all")) {
+ cpp++;
+ if (!*cpp) {
+ if (fp->fr_type == FR_T_NONE) {
+ fp->fr_dsize = 0;
+ fp->fr_data = NULL;
+ }
+ return fp;
+ }
+ fp->fr_type = FR_T_IPF;
+#ifdef IPFILTER_BPF
+ } else if (!strcmp(*cpp, "{")) {
+ struct bpf_program bpf;
+ struct pcap *p;
+ char **cp;
+ u_32_t l;
+
+ if (fp->fr_type != FR_T_NONE) {
+ fprintf(stderr,
+ "%d: cannot mix BPF/ipf matching\n", linenum);
+ return NULL;
+ }
+ fp->fr_type = FR_T_BPFOPC;
+ cpp++;
+ if (!strncmp(*cpp, "0x", 2)) {
+ fp->fr_data = malloc(4);
+ for (cp = cpp, i = 0; *cp; cp++, i++) {
+ if (!strcmp(*cp, "}"))
+ break;
+ fp->fr_data = realloc(fp->fr_data,
+ (i + 1) * 4);
+ l = strtoul(*cp, NULL, 0);
+ ((u_32_t *)fp->fr_data)[i] = l;
+ }
+ if (!*cp) {
+ fprintf(stderr, "Missing closing '}'\n");
+ return NULL;
+ }
+ fp->fr_dsize = i * sizeof(l);
+ bpf.bf_insns = fp->fr_data;
+ bpf.bf_len = fp->fr_dsize / sizeof(struct bpf_insn);
+ } else {
+ for (cp = cpp; *cp; cp++) {
+ if (!strcmp(*cp, "}"))
+ break;
+ (*cp)[-1] = ' ';
+ }
+ if (!*cp) {
+ fprintf(stderr, "Missing closing '}'\n");
+ return NULL;
+ }
+
+ bzero((char *)&bpf, sizeof(bpf));
+ p = pcap_open_dead(DLT_RAW, 1);
+ if (!p) {
+ fprintf(stderr, "pcap_open_dead failed\n");
+ return NULL;
+ }
+
+ if (pcap_compile(p, &bpf, *cpp, 1, 0xffffffff)) {
+ pcap_perror(p, "ipf");
+ pcap_close(p);
+ fprintf(stderr, "pcap parsing failed\n");
+ return NULL;
+ }
+ pcap_close(p);
+ fp->fr_dsize = bpf.bf_len * sizeof(struct bpf_insn);
+ fp->fr_data = bpf.bf_insns;
+ if (!bpf_validate(fp->fr_data, bpf.bf_len)) {
+ fprintf(stderr, "BPF validation failed\n");
+ return NULL;
+ }
+ if (opts & OPT_DEBUG)
+ bpf_dump(&bpf, 0);
+ }
+ cpp = cp;
+ (*cpp)++;
+#endif
+ } else {
+ fp->fr_type = FR_T_IPF;
+
+ if (strcasecmp(*cpp, "from")) {
+ fprintf(stderr, "%d: unexpected keyword (%s) - from\n",
+ linenum, *cpp);
+ return NULL;
+ }
+ if (!*++cpp) {
+ fprintf(stderr, "%d: missing host after from\n",
+ linenum);
+ return NULL;
+ }
+ if (**cpp == '!') {
+ fp->fr_flags |= FR_NOTSRCIP;
+ (*cpp)++;
+ } else if (!strcmp(*cpp, "!")) {
+ fp->fr_flags |= FR_NOTSRCIP;
+ cpp++;
+ }
+
+ s = *cpp;
+ i = hostmask(&cpp, proto, fp->fr_ifname, (u_32_t *)&fp->fr_src,
+ (u_32_t *)&fp->fr_smsk, linenum);
+ if (i == -1)
+ return NULL;
+ if (*fp->fr_ifname && !strcasecmp(s, fp->fr_ifname))
+ fp->fr_satype = FRI_DYNAMIC;
+ if (i == 1) {
+ if (fp->fr_v == 6) {
+ fprintf(stderr,
+ "can only use pools with ipv4\n");
+ return NULL;
+ }
+ fp->fr_satype = FRI_LOOKUP;
+ }
+
+ if (ports(&cpp, proto, &fp->fr_sport, &fp->fr_scmp,
+ &fp->fr_stop, linenum))
+ return NULL;
+
+ if (!*cpp) {
+ fprintf(stderr, "%d: missing to fields\n", linenum);
+ return NULL;
+ }
+
+ /*
+ * do the same for the to field (destination host)
+ */
+ if (strcasecmp(*cpp, "to")) {
+ fprintf(stderr, "%d: unexpected keyword (%s) - to\n",
+ linenum, *cpp);
+ return NULL;
+ }
+ if (!*++cpp) {
+ fprintf(stderr, "%d: missing host after to\n", linenum);
+ return NULL;
+ }
+
+ if (**cpp == '!') {
+ fp->fr_flags |= FR_NOTDSTIP;
+ (*cpp)++;
+ } else if (!strcmp(*cpp, "!")) {
+ fp->fr_flags |= FR_NOTDSTIP;
+ cpp++;
+ }
+
+ s = *cpp;
+ i = hostmask(&cpp, proto, fp->fr_ifname, (u_32_t *)&fp->fr_dst,
+ (u_32_t *)&fp->fr_dmsk, linenum);
+ if (i == -1)
+ return NULL;
+ if (*fp->fr_ifname && !strcasecmp(s, fp->fr_ifname))
+ fp->fr_datype = FRI_DYNAMIC;
+ if (i == 1) {
+ if (fp->fr_v == 6) {
+ fprintf(stderr,
+ "can only use pools with ipv4\n");
+ return NULL;
+ }
+ fp->fr_datype = FRI_LOOKUP;
+ }
+
+ if (ports(&cpp, proto, &fp->fr_dport, &fp->fr_dcmp,
+ &fp->fr_dtop, linenum))
+ return NULL;
+ }
+
+ if (fp->fr_type == FR_T_IPF) {
+ /*
+ * check some sanity, make sure we don't have icmp checks
+ * with tcp or udp or visa versa.
+ */
+ if (fp->fr_proto && (fp->fr_dcmp || fp->fr_scmp) &&
+ fp->fr_proto != IPPROTO_TCP &&
+ fp->fr_proto != IPPROTO_UDP) {
+ fprintf(stderr,
+ "%d: port operation on non tcp/udp\n",linenum);
+ return NULL;
+ }
+ if (fp->fr_icmp && fp->fr_proto != IPPROTO_ICMP) {
+ fprintf(stderr,
+ "%d: icmp comparisons on wrong protocol\n",
+ linenum);
+ return NULL;
+ }
+
+ if (!*cpp)
+ return fp;
+
+ if (*cpp && (fp->fr_type == FR_T_IPF) &&
+ !strcasecmp(*cpp, "flags")) {
+ if (!*++cpp) {
+ fprintf(stderr, "%d: no flags present\n",
+ linenum);
+ return NULL;
+ }
+ fp->fr_tcpf = tcp_flags(*cpp, &fp->fr_tcpfm, linenum);
+ cpp++;
+ }
+
+ /*
+ * extras...
+ */
+ if ((fp->fr_v == 4) && *cpp && (!strcasecmp(*cpp, "with") ||
+ !strcasecmp(*cpp, "and")))
+ if (extras(&cpp, fp, linenum))
+ return NULL;
+
+ /*
+ * icmp types for use with the icmp protocol
+ */
+ if (*cpp && !strcasecmp(*cpp, "icmp-type")) {
+ if (fp->fr_proto != IPPROTO_ICMP &&
+ fp->fr_proto != IPPROTO_ICMPV6) {
+ fprintf(stderr,
+ "%d: icmp with wrong protocol (%d)\n",
+ linenum, fp->fr_proto);
+ return NULL;
+ }
+ if (addicmp(&cpp, fp, linenum))
+ return NULL;
+ fp->fr_icmp = htons(fp->fr_icmp);
+ fp->fr_icmpm = htons(fp->fr_icmpm);
+ }
+ }
+
+ /*
+ * Keep something...
+ */
+ while (*cpp && !strcasecmp(*cpp, "keep"))
+ if (addkeep(&cpp, fp, linenum))
+ return NULL;
+
+ /*
+ * This is here to enforce the old interface binding behaviour.
+ * That is, "on X" is equivalent to "<dir> on X <!dir>-via -,X"
+ */
+ if (fp->fr_flags & FR_KEEPSTATE) {
+ if (*fp->fr_ifnames[0] && !*fp->fr_ifnames[3]) {
+ bcopy(fp->fr_ifnames[0], fp->fr_ifnames[3],
+ sizeof(fp->fr_ifnames[3]));
+ strncpy(fp->fr_ifnames[2], "*",
+ sizeof(fp->fr_ifnames[3]));
+ }
+ }
+
+ /*
+ * head of a new group ?
+ */
+ if (*cpp && !strcasecmp(*cpp, "head")) {
+ if (fp->fr_arg != 0) {
+ fprintf(stderr, "%d: cannot use skip with head\n",
+ linenum);
+ return NULL;
+ }
+ if (!*++cpp) {
+ fprintf(stderr, "%d: head without group #\n", linenum);
+ return NULL;
+ }
+ if (strlen(*cpp) > FR_GROUPLEN) {
+ fprintf(stderr, "%d: head name too long #\n", linenum);
+ return NULL;
+ }
+ strncpy(fp->fr_grhead, *cpp, FR_GROUPLEN);
+ cpp++;
+ }
+
+ /*
+ * reference to an already existing group ?
+ */
+ if (*cpp && !strcasecmp(*cpp, "group")) {
+ if (!*++cpp) {
+ fprintf(stderr, "%d: group without group #\n",
+ linenum);
+ return NULL;
+ }
+ if (strlen(*cpp) > FR_GROUPLEN) {
+ fprintf(stderr, "%d: group name too long #\n", linenum);
+ return NULL;
+ }
+ strncpy(fp->fr_group, *cpp, FR_GROUPLEN);
+ cpp++;
+ }
+
+ if (*cpp && !strcasecmp(*cpp, "tag")) {
+ if (!*++cpp) {
+ fprintf(stderr, "%d: tag id missing value\n", linenum);
+ return NULL;
+ }
+ fp->fr_tag = strtol(*cpp, NULL, 0);
+ cpp++;
+ }
+
+ /*
+ * pps counter
+ */
+ if (*cpp && !strcasecmp(*cpp, "pps")) {
+ if (!*++cpp) {
+ fprintf(stderr, "%d: pps without rate\n", linenum);
+ return NULL;
+ }
+ if (ratoui(*cpp, &k, 0, INT_MAX))
+ fp->fr_pps = k;
+ else {
+ fprintf(stderr, "%d: invalid pps rate (%s)\n",
+ linenum, *cpp);
+ return NULL;
+ }
+ cpp++;
+ }
+
+ /*
+ * leftovers...yuck
+ */
+ if (*cpp && **cpp) {
+ fprintf(stderr, "%d: unknown words at end: [", linenum);
+ for (; *cpp; cpp++)
+ fprintf(stderr, "%s ", *cpp);
+ fprintf(stderr, "]\n");
+ return NULL;
+ }
+
+ /*
+ * lazy users...
+ */
+ if (fp->fr_type == FR_T_IPF) {
+ if ((fp->fr_tcpf || fp->fr_tcpfm) &&
+ (fp->fr_proto != IPPROTO_TCP)) {
+ fprintf(stderr,
+ "%d: TCP protocol not specified\n", linenum);
+ return NULL;
+ }
+ if (!(fp->fr_flx & FI_TCPUDP) &&
+ (fp->fr_proto != IPPROTO_TCP) &&
+ (fp->fr_proto != IPPROTO_UDP) &&
+ (fp->fr_dcmp || fp->fr_scmp)) {
+ if (!fp->fr_proto) {
+ fp->fr_flx |= FI_TCPUDP;
+ fp->fr_mflx |= FI_TCPUDP;
+ } else {
+ fprintf(stderr,
+ "%d: port check for non-TCP/UDP\n",
+ linenum);
+ return NULL;
+ }
+ }
+ }
+ if (*fp->fr_oifname && strcmp(fp->fr_oifname, "*") &&
+ !(fp->fr_flags & FR_KEEPSTATE)) {
+ fprintf(stderr, "%d: *-via <if> must be used %s\n",
+ linenum, "with keep-state");
+ return NULL;
+ }
+ return fp;
+}
generated by cgit v1.3 (git 2.53.0) at 2026-08-03 09:40:28 +0000