curl_easy_getinfo undefined symbol error

Question

I am using asterisk version 13.5.0. In utils directory, I created a new module called curl_util with source code as below:

#include "asterisk/curl_utils.h"
HttpResponse * httpResponseNew()
{
    HttpResponse * response = calloc(1, sizeof(HttpResponse));

    return response;
error:
    return NULL;
}

HttpResponse * httpRequestPost(char *url, char *post_body, size_t size)
{
    struct MemoryStruct chunk;
    CURL *curl = curl_easy_init();

    chunk.memory = malloc(1);
    chunk.size = 0;

    HttpResponse *response = httpResponseNew();
    curl_easy_setopt(curl, CURLOPT_URL, url);
    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
    curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 0);
    curl_easy_setopt(curl, CURLOPT_POST, 1L);
    curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post_body);
    curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, size);
    curl_easy_setopt(curl, CURLOPT_TIMEOUT, 30);
    curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, HttpResponseMemoryWriter);
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);

    response->res = curl_easy_perform(curl);

    if (response->res != CURLE_OK)
    {
        response->OK = 0;
    }
    else
    {
        response->OK = 1;
        response->size = chunk.size;
        response->body = chunk.memory;
    }

    curl_easy_cleanup(curl);

    return response;

error:
    free(chunk.memory);
    if (curl) curl_easy_cleanup(curl);
    return response;
}

In chan_sip.c, I call above mentioned httpRequestPost function. Executing make and make install are OK. But, when starting dahdi and asterisk, I got the following error:

Error loading module chan_sip.so: undefined symbol: httpRequestPost

loader.c: module chan_sip.so could not be loaded.

Could you please give hints or advices to fix this error? Thank you in advance.

Maybe it has to do with module load order? see the book for info on load order — QuickDanger
Thank you. For my case, I guessed curl_util is not linked for make file to build it although in Makefile, the path to curl_util is included already. So, I tried moving the above source code to chan_sip.c then the error disappeared. However, I get another error: Error loading module chan_sip.so: undefined symbol: curl_easy_getinfo. loader.c: module chan_sip.so could not be loaded. — Aloha
I wonder if asterisk has a function that parses xml content from a URL similar to function httpRequestPost() said above. Anybody know? — Aloha
I would use an AGI and parse the XML outside of the dialplan. This way you could actually do the CURL request and XML parsing in a single line of dialplan, using an external script, which can send back Goto's, Dial's, etc to direct the call based on your XML. — QuickDanger

LOLKFC LOLKFC · Accepted Answer · 2016-03-30T08:16:16

Doesn't need to edit the makefile. You just need to use the ASTLDFLAGS compiler option like :

./configure
make ASTLDFLAGS="-lcurl"
make install
make samples
make config

curl_easy_getinfo undefined symbol error

2 Answers