icmptunnel
icmptunnel copied to clipboard
Published
20 hours ago •
DhavalKapil
DhavalKapil
Compile Error on OS X Capitain
This is the error I get when I try to compile icmptunnel on OS X Capitain.
icmptunnel git:(master) make
gcc -c -o icmptunnel.o icmptunnel.c -I.
gcc -c -o icmp.o icmp.c -I.
icmp.c:22:29: warning: declaration of 'struct iphdr' will not be visible outside of this function [-Wvisibility]
void prepare_headers(struct iphdr *ip, struct icmphdr *icmp);
^
icmp.c:22:47: warning: declaration of 'struct icmphdr' will not be visible outside of this function [-Wvisibility]
void prepare_headers(struct iphdr *ip, struct icmphdr *icmp);
^
icmp.c:100:3: warning: implicit declaration of function 'inet_pton' is invalid in C99 [-Wimplicit-function-declaration]
inet_pton(AF_INET, packet_details->src_addr, &src_addr);
^
icmp.c:103:17: error: invalid application of 'sizeof' to an incomplete type 'struct iphdr'
packet_size = sizeof(struct iphdr) + sizeof(struct icmphdr) + packet_details->payload_size;
^ ~~~~~~~~~~~~~~
icmp.c:91:10: note: forward declaration of 'struct iphdr'
struct iphdr *ip;
^
icmp.c:103:40: error: invalid application of 'sizeof' to an incomplete type 'struct icmphdr'
packet_size = sizeof(struct iphdr) + sizeof(struct icmphdr) + packet_details->payload_size;
^ ~~~~~~~~~~~~~~~~
icmp.c:92:10: note: forward declaration of 'struct icmphdr'
struct icmphdr *icmp;
^
icmp.c:114:38: error: invalid application of 'sizeof' to an incomplete type 'struct iphdr'
icmp = (struct icmphdr *)(packet + sizeof(struct iphdr));
^ ~~~~~~~~~~~~~~
icmp.c:91:10: note: forward declaration of 'struct iphdr'
struct iphdr *ip;
^
icmp.c:115:36: error: invalid application of 'sizeof' to an incomplete type 'struct iphdr'
icmp_payload = (char *)(packet + sizeof(struct iphdr) + sizeof(struct icmphdr));
^ ~~~~~~~~~~~~~~
icmp.c:91:10: note: forward declaration of 'struct iphdr'
struct iphdr *ip;
^
icmp.c:115:59: error: invalid application of 'sizeof' to an incomplete type 'struct icmphdr'
icmp_payload = (char *)(packet + sizeof(struct iphdr) + sizeof(struct icmphdr));
^ ~~~~~~~~~~~~~~~~
icmp.c:92:10: note: forward declaration of 'struct icmphdr'
struct icmphdr *icmp;
^
icmp.c:117:19: warning: incompatible pointer types passing 'struct iphdr *' to parameter of type 'struct iphdr *' [-Wincompatible-pointer-types]
prepare_headers(ip, icmp);
^~
icmp.c:22:36: note: passing argument to parameter 'ip' here
void prepare_headers(struct iphdr *ip, struct icmphdr *icmp);
^
icmp.c:117:23: warning: incompatible pointer types passing 'struct icmphdr *' to parameter of type 'struct icmphdr *' [-Wincompatible-pointer-types]
prepare_headers(ip, icmp);
^~~~
icmp.c:22:56: note: passing argument to parameter 'icmp' here
void prepare_headers(struct iphdr *ip, struct icmphdr *icmp);
^
icmp.c:119:5: error: incomplete definition of type 'struct iphdr'
ip->tot_len = htons(packet_size);
~~^
icmp.c:91:10: note: forward declaration of 'struct iphdr'
struct iphdr *ip;
^
icmp.c:120:5: error: incomplete definition of type 'struct iphdr'
ip->saddr = src_addr.s_addr;
~~^
icmp.c:91:10: note: forward declaration of 'struct iphdr'
struct iphdr *ip;
^
icmp.c:121:5: error: incomplete definition of type 'struct iphdr'
ip->daddr = dest_addr.s_addr;
~~^
icmp.c:91:10: note: forward declaration of 'struct iphdr'
struct iphdr *ip;
^
icmp.c:125:7: error: incomplete definition of type 'struct icmphdr'
icmp->type = packet_details->type;
~~~~^
icmp.c:92:10: note: forward declaration of 'struct icmphdr'
struct icmphdr *icmp;
^
icmp.c:126:7: error: incomplete definition of type 'struct icmphdr'
icmp->checksum = 0;
~~~~^
icmp.c:92:10: note: forward declaration of 'struct icmphdr'
struct icmphdr *icmp;
^
icmp.c:127:7: error: incomplete definition of type 'struct icmphdr'
icmp->checksum = in_cksum((unsigned short *)icmp, sizeof(struct icmphdr) + packet_details->payload_size);
~~~~^
icmp.c:92:10: note: forward declaration of 'struct icmphdr'
struct icmphdr *icmp;
^
icmp.c:127:53: error: invalid application of 'sizeof' to an incomplete type 'struct icmphdr'
icmp->checksum = in_cksum((unsigned short *)icmp, sizeof(struct icmphdr) + packet_details->payload_size);
^ ~~~~~~~~~~~~~~~~
icmp.c:92:10: note: forward declaration of 'struct icmphdr'
struct icmphdr *icmp;
^
icmp.c:162:83: warning: passing 'int *' to parameter of type 'socklen_t *' (aka 'unsigned int *') converts between pointers to integer types with different sign [-Wpointer-sign]
packet_size = recvfrom(sock_fd, packet, MTU, 0, (struct sockaddr *)&(src_addr), &src_addr_size);
^~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/sys/socket.h:592:25: note: passing argument to parameter here
socklen_t * __restrict) __DARWIN_ALIAS_C(recvfrom);
^
icmp.c:165:38: error: invalid application of 'sizeof' to an incomplete type 'struct iphdr'
icmp = (struct icmphdr *)(packet + sizeof(struct iphdr));
^ ~~~~~~~~~~~~~~
icmp.c:147:10: note: forward declaration of 'struct iphdr'
struct iphdr *ip;
^
icmp.c:166:36: error: invalid application of 'sizeof' to an incomplete type 'struct iphdr'
icmp_payload = (char *)(packet + sizeof(struct iphdr) + sizeof(struct icmphdr));
^ ~~~~~~~~~~~~~~
icmp.c:147:10: note: forward declaration of 'struct iphdr'
struct iphdr *ip;
^
icmp.c:166:59: error: invalid application of 'sizeof' to an incomplete type 'struct icmphdr'
icmp_payload = (char *)(packet + sizeof(struct iphdr) + sizeof(struct icmphdr));
^ ~~~~~~~~~~~~~~~~
icmp.c:148:10: note: forward declaration of 'struct icmphdr'
struct icmphdr *icmp;
^
icmp.c:169:3: warning: implicit declaration of function 'inet_ntop' is invalid in C99 [-Wimplicit-function-declaration]
inet_ntop(AF_INET, &(ip->saddr), packet_details->src_addr, INET_ADDRSTRLEN);
^
icmp.c:169:26: error: incomplete definition of type 'struct iphdr'
inet_ntop(AF_INET, &(ip->saddr), packet_details->src_addr, INET_ADDRSTRLEN);
~~^
icmp.c:147:10: note: forward declaration of 'struct iphdr'
struct iphdr *ip;
^
icmp.c:170:26: error: incomplete definition of type 'struct iphdr'
inet_ntop(AF_INET, &(ip->daddr), packet_details->dest_addr, INET_ADDRSTRLEN);
~~^
icmp.c:147:10: note: forward declaration of 'struct iphdr'
struct iphdr *ip;
^
icmp.c:171:30: error: incomplete definition of type 'struct icmphdr'
packet_details->type = icmp->type;
~~~~^
icmp.c:148:10: note: forward declaration of 'struct icmphdr'
struct icmphdr *icmp;
^
icmp.c:172:48: error: invalid application of 'sizeof' to an incomplete type 'struct iphdr'
packet_details->payload_size = packet_size - sizeof(struct iphdr) - sizeof(struct icmphdr);
^ ~~~~~~~~~~~~~~
icmp.c:147:10: note: forward declaration of 'struct iphdr'
struct iphdr *ip;
^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
7 warnings and 20 errors generated.
make: *** [icmp.o] Error 1
The issue is probably with some header file. Presently it works fine on linux. Will look into it in some time
For what it's worth, I also tried compiling this with gcc47 (sourced from pkg-src and installed on OS X 10.11.2) instead of clang and it still exited with errors
gcc -c -o icmptunnel.o icmptunnel.c -I.
gcc -c -o icmp.o icmp.c -I.
icmp.c:22:47: warning: 'struct icmphdr' declared inside parameter list [enabled by default]
icmp.c:22:47: warning: its scope is only this definition or declaration, which is probably not what you want [enabled by default]
icmp.c:22:47: warning: 'struct iphdr' declared inside parameter list [enabled by default]
icmp.c: In function 'send_icmp_packet':
icmp.c:103:24: error: invalid application of 'sizeof' to incomplete type 'struct iphdr'
icmp.c:103:47: error: invalid application of 'sizeof' to incomplete type 'struct icmphdr'
icmp.c:114:45: error: invalid application of 'sizeof' to incomplete type 'struct iphdr'
icmp.c:115:43: error: invalid application of 'sizeof' to incomplete type 'struct iphdr'
icmp.c:115:66: error: invalid application of 'sizeof' to incomplete type 'struct icmphdr'
icmp.c:117:3: warning: passing argument 1 of 'prepare_headers' from incompatible pointer type [enabled by default]
icmp.c:22:6: note: expected 'struct iphdr *' but argument is of type 'struct iphdr *'
icmp.c:117:3: warning: passing argument 2 of 'prepare_headers' from incompatible pointer type [enabled by default]
icmp.c:22:6: note: expected 'struct icmphdr *' but argument is of type 'struct icmphdr *'
icmp.c:119:5: error: dereferencing pointer to incomplete type
icmp.c:120:5: error: dereferencing pointer to incomplete type
icmp.c:121:5: error: dereferencing pointer to incomplete type
icmp.c:125:7: error: dereferencing pointer to incomplete type
icmp.c:126:7: error: dereferencing pointer to incomplete type
icmp.c:127:7: error: dereferencing pointer to incomplete type
icmp.c:127:60: error: invalid application of 'sizeof' to incomplete type 'struct icmphdr'
icmp.c: In function 'receive_icmp_packet':
icmp.c:165:45: error: invalid application of 'sizeof' to incomplete type 'struct iphdr'
icmp.c:166:43: error: invalid application of 'sizeof' to incomplete type 'struct iphdr'
icmp.c:166:66: error: invalid application of 'sizeof' to incomplete type 'struct icmphdr'
icmp.c:169:26: error: dereferencing pointer to incomplete type
icmp.c:170:26: error: dereferencing pointer to incomplete type
icmp.c:171:30: error: dereferencing pointer to incomplete type
icmp.c:172:55: error: invalid application of 'sizeof' to incomplete type 'struct iphdr'
icmp.c:172:78: error: invalid application of 'sizeof' to incomplete type 'struct icmphdr'
icmp.c: At top level:
icmp.c:220:47: warning: 'struct icmphdr' declared inside parameter list [enabled by default]
icmp.c:220:47: warning: 'struct iphdr' declared inside parameter list [enabled by default]
icmp.c:220:6: error: conflicting types for 'prepare_headers'
icmp.c:22:6: note: previous declaration of 'prepare_headers' was here
icmp.c: In function 'prepare_headers':
icmp.c:222:5: error: dereferencing pointer to incomplete type
icmp.c:223:5: error: dereferencing pointer to incomplete type
icmp.c:224:5: error: dereferencing pointer to incomplete type
icmp.c:225:5: error: dereferencing pointer to incomplete type
icmp.c:226:5: error: dereferencing pointer to incomplete type
icmp.c:227:5: error: dereferencing pointer to incomplete type
icmp.c:228:5: error: dereferencing pointer to incomplete type
icmp.c:230:7: error: dereferencing pointer to incomplete type
icmp.c:231:7: error: dereferencing pointer to incomplete type
icmp.c:232:7: error: dereferencing pointer to incomplete type
icmp.c:233:7: error: dereferencing pointer to incomplete type
make: *** [icmp.o] Error 1
running echo $? reveals that it exited with code 2. gcc version used is version 4.7.4 built and installed yesterday.
Perhapsstruct iphdr is defined differently/not defined in OS X. I'll have to define it myself.
I'm still searching for other solutions though.
Yeah, I tried declaring the structs manually in the icmp.c file [struct iphdr{stuff}; , etc], which fixed the 'incomplete type' issues. I do agree that there is probably a more portable solution to the problem though.
@martinorob An alternative ICMP tunnel implementation with a working OS X client is Hans: http://code.gerade.org/hans/ https://github.com/friedrich/hans
struct iphdr not exists on MacOS, use the define code below
#ifdef APPLE #define iphdr ip #endif
