From 6ddfa398d6006a13c7e4d047a44a973169864aa3 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@anytun.org>
Date: Mon, 16 Mar 2009 21:54:46 +0000
Subject: added --role to options parser

---
 src/options.c | 24 ++++++++++++++++++++++++
 src/options.h |  4 ++++
 src/uanytun.c |  3 +++
 3 files changed, 31 insertions(+)

diff --git a/src/options.c b/src/options.c
index 09265da..2f77cca 100644
--- a/src/options.c
+++ b/src/options.c
@@ -223,6 +223,7 @@ int options_parse(options_t* opt, int argc, char* argv[])
 
   argc--;
 
+  char* role = NULL;
   int i, ipv4_only = 0, ipv6_only = 0;
   for(i=1; argc > 0; ++i)
   {
@@ -257,6 +258,7 @@ int options_parse(options_t* opt, int argc, char* argv[])
 #ifndef NO_PASSPHRASE
     PARSE_STRING_PARAM_SEC("-E","--passphrase", opt->passphrase_)
 #endif
+    PARSE_STRING_PARAM("-e","--role", role)
     PARSE_HEXSTRING_PARAM_SEC("-K","--key", opt->key_)
     PARSE_HEXSTRING_PARAM_SEC("-A","--salt", opt->salt_)
     PARSE_STRING_PARAM("-c","--cipher", opt->cipher_)
@@ -273,6 +275,19 @@ int options_parse(options_t* opt, int argc, char* argv[])
   if(ipv6_only)
     opt->resolv_addr_type_ = IPV6_ONLY;
 
+  if(role) {
+    if(!strcmp(role, "alice") || !strcmp(role, "server") || !strcmp(role, "left"))
+      opt->role_ = ROLE_LEFT;
+    else if(!strcmp(role, "bob") || !strcmp(role, "client") || !strcmp(role, "right"))
+      opt->role_ = ROLE_RIGHT;
+    else if(!strcmp(role, "eve") || !strcmp(role, "weak") || !strcmp(role, "symmetric"))
+      opt->role_ = ROLE_SYMMETRIC;
+    else {
+      free(role);
+      return -4;
+    }
+    free(role);
+  }
   return 0;
 }
 
@@ -341,6 +356,7 @@ void options_default(options_t* opt)
   opt->kd_prf_ = strdup("aes-ctr");
   opt->ld_kdr_ = 0;
   opt->passphrase_ = NULL;
+  opt->role_ = ROLE_LEFT;
   opt->cipher_ = strdup("aes-ctr");
   opt->auth_algo_ = strdup("sha1");
   opt->auth_tag_length_ = 10;
@@ -438,6 +454,7 @@ void options_print_usage()
 #endif
   printf("        [-K|--key] <master key>             master key to use for encryption\n");
   printf("        [-A|--salt] <master salt>           master salt to use for encryption\n");
+  printf("        [-e|--role] <role>                  alice, bob or eve");
   printf("        [-c|--cipher] <cipher type>         payload encryption algorithm\n");
   printf("        [-a|--auth-algo] <algo type>        message authentication algorithm\n");
   printf("        [-b|--auth-tag-length] <length>     length of the auth tag\n");
@@ -483,6 +500,13 @@ void options_print(options_t* opt)
   printf("kd_prf: '%s'\n", opt->kd_prf_);
   printf("ld_kdr: %d\n", opt->ld_kdr_);
   printf("passphrase: '%s'\n", opt->passphrase_);
+  printf("role: ");
+  switch(opt->role_) {
+  case ROLE_LEFT: printf("left\n"); break;
+  case ROLE_RIGHT: printf("right\n"); break;
+  case ROLE_SYMMETRIC: printf("symmetric\n"); break;
+  default: printf("??\n"); break;
+  }
 #endif
   printf("anytun02_compat: %d\n", opt->anytun02_compat_);
 
diff --git a/src/options.h b/src/options.h
index cfac90d..bbf3bd6 100644
--- a/src/options.h
+++ b/src/options.h
@@ -46,6 +46,9 @@ typedef struct ifconfig_param_struct ifconfig_param_t;
 enum resolv_addr_type_enum { ANY, IPV4_ONLY, IPV6_ONLY };
 typedef enum resolv_addr_type_enum resolv_addr_type_t;
 
+enum role_enum  { ROLE_LEFT, ROLE_RIGHT, ROLE_SYMMETRIC };
+typedef enum role_enum role_t;
+
 struct options_struct {
   char* progname_;
   int daemonize_;
@@ -72,6 +75,7 @@ struct options_struct {
   int ld_kdr_;
   char* auth_algo_;
   char* passphrase_;
+  role_t role_;
 #endif
   int anytun02_compat_;
   u_int32_t auth_tag_length_;
diff --git a/src/uanytun.c b/src/uanytun.c
index 72a0fab..78c9f77 100644
--- a/src/uanytun.c
+++ b/src/uanytun.c
@@ -324,6 +324,9 @@ int main(int argc, char* argv[])
     if(ret == -3) {
       fprintf(stderr, "syntax error: -4 and -6 are mutual exclusive\n\n");
     }
+    if(ret == -4) {
+      fprintf(stderr, "syntax error: unknown role name\n\n");
+    }
 
     if(ret != -2) 
       options_print_usage();
-- 
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