Hi Didier, Thanks for your reply. Apologies for the delayed response; I hadn't accessed my list mail in a while.
> > $ gcc packetforwardrohc.c -o packetforwardrohc -I/usr/include > > -L/usr/lib -lpcap `libnet-config --defines --cflags --libs` > > -lrohc_comp -lrohc_common -lm > > > > In file included from headers.h:8, > > from packetforwardrohc.c:50: > > /home/josie/rohc-1.2.0/src/comp/rohc_comp.h:197: warning: ‘struct > > ip_packet’ declared inside parameter list > > /home/josie/rohc-1.2.0/src/comp/rohc_comp.h:197: warning: its scope > > is only this definition or declaration, which is probably not what > > you want /home/josie/rohc-1.2.0/src/comp/rohc_comp.h:205: warning: > > ‘struct ip_packet’ declared inside parameter list > > /home/josie/rohc-1.2.0/src/comp/rohc_comp.h:210: warning: ‘struct > > ip_packet’ declared inside parameter list > > /home/josie/rohc-1.2.0/src/comp/rohc_comp.h:279: warning: ‘struct > > ip_packet’ declared inside parameter list > > /home/josie/rohc-1.2.0/src/comp/rohc_comp.h:280: warning: ‘struct > > ip_packet’ declared inside parameter list > > /home/josie/rohc-1.2.0/src/comp/rohc_comp.h:290: warning: ‘struct > > ip_packet’ declared inside parameter list > > In file included from packetforwardrohc.c:50: > > headers.h:14:1: warning: "ETHER_ADDR_LEN" redefined > > In file included from /usr/include/libnet.h:57, > > from packetforwardrohc.c:49: > > /usr/include/net/ethernet.h:52:1: warning: this is the location of the > > previous definition > > packetforwardrohc.c: In function ‘got_packet’: > > packetforwardrohc.c:535: warning: passing argument 2 of > > ‘rohc_compress’ discards qualifiers from pointer target type > > /usr/lib/gcc/i486-linux-gnu/4.2.4/../../../../lib/crt1.o: In function > > `_start': > > (.text+0x18): undefined reference to `main' > > collect2: ld returned 1 exit status > > GCC reports a problem in the file > "/home/josie/rohc-1.2.0/src/comp/rohc_comp.h", it means you try to > include this file in your code. You should not include this file > that way. > > You should first install the ROHC library binaries and headers on > your system from the sources and then build your program with the > installed binaries and headers (and not the ones you may found in the > source directory). > > The ROHC headers (rohc_comp.h among others) should be installed on your > system if you followed the steps described at > https://answers.launchpad.net/rohc/+faq/635. Check that the > file /usr/include/rohc_comp.h exist. If not, install the library first. > I realised that I had included the '/home/...../src/... .h' in a second of the program's files, so I deleted this second set. Then, in your program (packetforwardrohc.c), simply put the 2 following > lines at the top of the code: > #include <rohc.h> > #include <rohc_comp.h> > I also made the changes above, from what I initially had, which was #include "rohc.h" #include "rohc_comp.h" When I compiled again there were fewer errors: $ gcc -o packetforwardrohc packetforwardrohc.c -lrohc_decomp -lrohc_comp -lrohc_common -lm -lnet -lpcap packetforwardrohc.c: In function ‘got_packet’: packetforwardrohc.c:540: warning: passing argument 2 of ‘rohc_compress’ discards qualifiers from pointer target type /usr/lib/gcc/i486-linux-gnu/4.2.4/../../../../lib/crt1.o: In function `_start': (.text+0x18): undefined reference to `main' collect2: ld returned 1 exit status > A simple program example for using the ROHC compression is attached to > this message. You may build it with the following GCC command : > $ gcc -o simple_rohc_program -g -Wall \ > -lrohc_common -lrohc_comp -lm \ > simple_rohc_program.c > Thanks a lot, the simple program is running perfectly, and I'll use it to help debug my program. Regards, Josephine
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